MWCC/compiler_and_linker/unsorted/InstrSelection.c

#include "compiler/InstrSelection.h"
#include "compiler/CError.h"
#include "compiler/CInt64.h"
#include "compiler/CMachine.h"
#include "compiler/CParser.h"
#include "compiler/CodeGen.h"
#include "compiler/CompilerTools.h"
#include "compiler/FunctionCalls.h"
#include "compiler/Intrinsics.h"
#include "compiler/Operands.h"
#include "compiler/PCode.h"
#include "compiler/PCodeInfo.h"
#include "compiler/PCodeUtilities.h"
#include "compiler/RegisterInfo.h"
#include "compiler/StructMoves.h"
#include "compiler/TOC.h"
#include "compiler/enode.h"
#include "compiler/objects.h"
#include "compiler/types.h"

PrecomputedOperand *precomputedoperands;
void (*cgdispatch[MAXEXPR + 1])(ENode *, short, short, Operand *);

// forward decls
static int ispowerof2(SInt32 val);
static void binary_immediate(Opcode opcode, ENode *left, SInt32 value, short outputReg, Operand *output);
static void shift_left_immediate(ENode *expr, short shift, short negate, short outputReg, Operand *output);
static void shift_right_immediate(ENode *expr, Type *type, short shift, short outputReg, Operand *output);
static void or_xor_immediate(Opcode opcode, ENode *expr, SInt32 value, short outputReg, Operand *output);
static void signed_divide_by_power_of_2(ENode *expr, int shift, int negate, short outputReg, Operand *output);
static void signed_mod_by_power_of_2(ENode *expr, int shift, int negate, short outputReg, Operand *output);
static void fp_binary_operator(Opcode opcode, ENode *left, ENode *right, short outputReg, Operand *output);
static void logical_expression_nobranch(ENode *cond, Boolean invert, Operand *output);
static void shift_and_mask(ENode *expr, short a, short b, short c, short outputReg, Operand *output);
static ENodeType invert_relop(ENodeType nt);

#define IS_INT_CONST(node) ( ENODE_IS((node), EINTCONST) && IS_TYPE_INT((node)->rtype) && (node)->rtype->size <= 4 )
#define IS_INT_CONST_ZERO(node) ( IS_INT_CONST(node) && (node)->data.intval.lo == 0 )

void init_cgdispatch(void) {
    ENodeType t;

    for (t = 0; t <= MAXEXPR; t++)
        cgdispatch[t] = gen_UNEXPECTED;

    cgdispatch[EPOSTINC] = gen_POSTINCDEC;
    cgdispatch[EPOSTDEC] = gen_POSTINCDEC;
    cgdispatch[EINDIRECT] = gen_INDIRECT;
    cgdispatch[EMONMIN] = gen_MONMIN;
    cgdispatch[EBINNOT] = gen_BINNOT;
    cgdispatch[ELOGNOT] = gen_LOGICAL;
    cgdispatch[EFORCELOAD] = gen_FORCELOAD;
    cgdispatch[EMUL] = gen_MUL;
    cgdispatch[EDIV] = gen_DIV;
    cgdispatch[EMODULO] = gen_MODULO;
    cgdispatch[EADD] = gen_ADD;
    cgdispatch[ESUB] = gen_SUB;
    cgdispatch[ESHL] = gen_SHL;
    cgdispatch[ESHR] = gen_SHR;
    cgdispatch[ELESS] = gen_COMPARE;
    cgdispatch[EGREATER] = gen_COMPARE;
    cgdispatch[ELESSEQU] = gen_COMPARE;
    cgdispatch[EGREATEREQU] = gen_COMPARE;
    cgdispatch[EEQU] = gen_COMPARE;
    cgdispatch[ENOTEQU] = gen_COMPARE;
    cgdispatch[EAND] = gen_AND;
    cgdispatch[EXOR] = gen_XOR;
    cgdispatch[EOR] = gen_OR;
    cgdispatch[ELAND] = gen_LOGICAL;
    cgdispatch[ELOR] = gen_LOGICAL;
    cgdispatch[EASS] = gen_ASS;
    cgdispatch[ECOMMA] = gen_COMMA;
    cgdispatch[ETYPCON] = gen_TYPCON;
    cgdispatch[EBITFIELD] = gen_BITFIELD;
    cgdispatch[EINTCONST] = gen_INTCONST;
    cgdispatch[EFLOATCONST] = gen_FLOATCONST;
    cgdispatch[ESTRINGCONST] = gen_STRINGCONST;
    cgdispatch[ECOND] = gen_COND;
    cgdispatch[EFUNCCALL] = gen_FUNCCALL;
    cgdispatch[EFUNCCALLP] = gen_FUNCCALL;
    cgdispatch[EOBJREF] = gen_OBJREF;
    cgdispatch[ENULLCHECK] = gen_NULLCHECK;
    cgdispatch[EPRECOMP] = gen_PRECOMP;
    cgdispatch[EDEFINE] = gen_DEFINE;
    cgdispatch[EREUSE] = gen_REUSE;
    cgdispatch[EVECTOR128CONST] = gen_VECTOR128CONST;
    cgdispatch[ECONDASS] = gen_CONDASS;
}

void gen_DEFINE(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    Operand *op;

    if (!expr->data.diadic.right) {
        op = lalloc(sizeof(Operand));
        memclrw(op, sizeof(Operand));
        expr->data.diadic.right = (ENode *) op;
        GEN_NODE(expr->data.diadic.left, op);
    }

    op = (Operand *) expr->data.diadic.right;
    *output = *op;
}

void gen_REUSE(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    ENode *inner = expr->data.monadic;
    CError_ASSERT(250, ENODE_IS(inner, EDEFINE));
    gen_DEFINE(inner, outputReg, outputRegHi, output);
}

void gen_POSTINCDEC(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    TypeBitfield *tbitfield;
    ENode *inner;
    Type *type;
    Operand a;
    Operand b;
    Operand c;
    Float fval;
    int objReg;
    int constReg;
    int finalReg;
    SInt32 incval;

    inner = expr->data.monadic->data.monadic;
    type = expr->rtype;
    tbitfield = NULL;

    memclrw(&a, sizeof(Operand));
    memclrw(&b, sizeof(Operand));
    memclrw(&c, sizeof(Operand));

    if (TYPE_IS_8BYTES(type)) {
        I8_gen_POSTINCDEC(expr, outputReg, outputRegHi, output);
        return;
    }

    if (IS_TYPE_FLOAT(type)) {
        if (ENODE_IS(inner, EOBJREF) && (objReg = OBJECT_REG(inner->data.objref))) {
            output->optype = OpndType_FPR;
            output->reg = (outputReg && outputReg != objReg) ? outputReg : ALLOC_FPR();
            emitpcode(PC_FMR, output->reg, objReg);
            fval = one_point_zero;
            load_floating_constant(constReg = ALLOC_FPR(), type, &fval);

            if (ENODE_IS(expr, EPOSTINC)) {
                emitpcode((type->size == 4) ? PC_FADDS : PC_FADD, objReg, objReg, constReg);
            } else {
                emitpcode((type->size == 4) ? PC_FSUBS : PC_FSUB, objReg, objReg, constReg);
            }
        } else {
            GEN_NODE(inner, &a);
            indirect(&a, inner);
            b = a;
            ENSURE_FPR(&b, type, 0);

            output->optype = OpndType_FPR;
            output->reg = ALLOC_FPR();
            emitpcode(PC_FMR, output->reg, b.reg);

            fval = one_point_zero;
            load_floating_constant(constReg = ALLOC_FPR(), type, &fval);

            finalReg = ALLOC_FPR();
            if (ENODE_IS(expr, EPOSTINC))
                emitpcode((type->size == 4) ? PC_FADDS : PC_FADD, finalReg, b.reg, constReg);
            else
                emitpcode((type->size == 4) ? PC_FSUBS : PC_FSUB, finalReg, b.reg, constReg);

            store_fp(finalReg, &a, type);
        }
    } else {
        if (IS_TYPE_POINTER(type)) {
            if (ENODE_IS(expr, EPOSTINC))
                incval = TPTR_TARGET(type)->size;
            else
                incval = -TPTR_TARGET(type)->size;
        } else {
            if (ENODE_IS(expr, EPOSTINC))
                incval = 1;
            else
                incval = -1;
        }

        if (ENODE_IS(inner, EOBJREF) && (objReg = OBJECT_REG(inner->data.objref))) {
            output->optype = OpndType_GPR;
            output->reg = (outputReg && outputReg != objReg) ? outputReg : ALLOC_GPR();
            emitpcode(PC_MR, output->reg, objReg);
            add_register_immediate(objReg, objReg, incval);
        } else {
            if (ENODE_IS(inner, EBITFIELD)) {
                tbitfield = TYPE_BITFIELD(TPTR_TARGET(inner));
                inner = inner->data.monadic;
            }
            GEN_NODE(inner, &a);
            indirect(&a, inner);
            b = a;
            ENSURE_GPR(&b, type, 0);

            if (tbitfield) {
                c = b;
                extract_bitfield(&c, tbitfield, 0, &b);
            }
            output->optype = OpndType_GPR;

            output->reg = ALLOC_GPR();
            emitpcode(PC_MR, output->reg, b.reg);

            finalReg = ALLOC_GPR();
            add_register_immediate(finalReg, b.reg, incval);

            if (tbitfield) {
                insert_bitfield(finalReg, &c, tbitfield);
                finalReg = c.reg;
            }

            store(finalReg, &a, type);
        }
    }
}

void gen_INDIRECT(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    Type *type;
    ENode *inner;
    VarInfo *vi;
    SInt32 postincvalue;
    Operand op;

    type = expr->rtype;
    inner = expr->data.monadic;

    if (TYPE_IS_8BYTES(type)) {
        I8_gen_INDIRECT(expr, outputReg, outputRegHi, output);
        return;
    }

    memclrw(&op, sizeof(Operand));
    if (ENODE_IS(inner, EOBJREF) && OBJECT_REG(inner->data.objref)) {
        vi = Registers_GetVarInfo(inner->data.objref);
        switch (vi->rclass) {
            case RegClass_GPR:
                output->optype = OpndType_GPR;
                break;
            case RegClass_FPR:
                output->optype = OpndType_FPR;
                break;
            case RegClass_VR:
                output->optype = OpndType_VR;
                break;
            case RegClass_CRFIELD:
                output->optype = OpndType_CRField;
                break;
            default:
                CError_FATAL(456);
        }
        output->reg = vi->reg;
        output->object = NULL;
        return;
    }

    if (ENODE_IS(inner, EBITFIELD)) {
        GEN_NODE(inner->data.monadic, &op);
        indirect(&op, expr);
        ENSURE_GPR(&op, type, 0);
        extract_bitfield(&op, TYPE_BITFIELD(inner->rtype), outputReg, output);
        return;
    }

    if (ispostincrementopportunity(inner, &op, &postincvalue) && (TYPE_FITS_IN_REGISTER(type) || IS_TYPE_FLOAT(type) || IS_TYPE_VECTOR(type))) {
        indirect(&op, expr);
        *output = op;
        if (TYPE_FITS_IN_REGISTER(type)) {
            ENSURE_GPR(output, type, outputReg);
        } else if (IS_TYPE_FLOAT(type)) {
            ENSURE_FPR(output, type, outputReg);
        } else {
            ENSURE_VR(output, type, outputReg);
        }

        add_register_immediate(op.reg, op.reg, postincvalue);
        return;
    }

    GEN_NODE(inner, output);
    indirect(output, expr);
}

void gen_MONMIN(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    ENode *inner;
    Type *type;
    ENode *scan;

    inner = expr->data.monadic;
    type = expr->rtype;

    if (TYPE_IS_8BYTES(type)) {
        I8_gen_MONMIN(expr, outputReg, outputRegHi, output);
        return;
    }

    if (IS_TYPE_FLOAT(type)) {
        if (ENODE_IS(inner, EADD) && ENODE_IS(inner->data.diadic.left, EMUL) && copts.fp_contract) {
            fp_multiply_add(
                    (type->size == 4) ? PC_FNMADDS : PC_FNMADD,
                    inner->data.diadic.left->data.diadic.left,
                    inner->data.diadic.left->data.diadic.right,
                    inner->data.diadic.right,
                    outputReg,
                    output);
        } else if (ENODE_IS(inner, EADD) && ENODE_IS(inner->data.diadic.right, EMUL) && copts.fp_contract) {
            fp_multiply_add(
                    (type->size == 4) ? PC_FNMADDS : PC_FNMADD,
                    inner->data.diadic.right->data.diadic.left,
                    inner->data.diadic.right->data.diadic.right,
                    inner->data.diadic.left,
                    outputReg,
                    output);
        } else if (ENODE_IS(inner, ESUB) && ENODE_IS(inner->data.diadic.left, EMUL) && copts.fp_contract) {
            fp_multiply_add(
                    (type->size == 4) ? PC_FNMSUBS : PC_FNMSUB,
                    inner->data.diadic.left->data.diadic.left,
                    inner->data.diadic.left->data.diadic.right,
                    inner->data.diadic.right,
                    outputReg,
                    output);
        } else {
            fp_unary_operator(PC_FNEG, inner, outputReg, output);
        }
        return;
    }

    scan = inner;
    while (ENODE_IS(scan, ETYPCON) && IS_TYPE_INT_OR_ENUM(type) && !is_unsigned(type))
        scan = scan->data.monadic;

    switch (scan->type) {
        case ELESS:
        case EGREATER:
        case ELESSEQU:
        case EGREATEREQU:
        case EEQU:
        case ENOTEQU:
            if (TYPE_FITS_IN_REGISTER(scan->data.diadic.left->rtype) && TYPE_FITS_IN_REGISTER(scan->data.diadic.right->rtype)) {
                gen_negated_condition_gpr(scan, output, outputReg);
                return;
            }
    }
    unary_operator(PC_NEG, inner, outputReg, output);
}

void gen_BINNOT(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    ENode *inner;
    Type *type;

    inner = expr->data.monadic;
    type = expr->rtype;

    if (TYPE_IS_8BYTES(type)) {
        I8_gen_BINNOT(expr, outputReg, outputRegHi, output);
        return;
    }

    if (ENODE_IS(inner, EAND))
        binary_operator(PC_NAND, inner->data.diadic.left, inner->data.diadic.right, outputReg, output);
    else if (ENODE_IS(inner, EOR))
        binary_operator(PC_NOR, inner->data.diadic.left, inner->data.diadic.right, outputReg, output);
    else if (ENODE_IS(inner, EXOR))
        binary_operator(PC_EQV, inner->data.diadic.left, inner->data.diadic.right, outputReg, output);
    else
        unary_operator(PC_NOT, inner, outputReg, output);
}

void gen_FORCELOAD(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    ENode *inner;

    inner = expr->data.monadic;
    GEN_NODE(inner, output);

    if (IS_TYPE_FLOAT(inner->rtype)) {
        ENSURE_FPR(output, inner->rtype, outputReg);
    } else if (IS_TYPE_VECTOR(inner->rtype)) {
        ENSURE_VR(output, inner->rtype, outputReg);
    } else if (TYPE_FITS_IN_REGISTER(inner->rtype)) {
        if (TYPE_IS_8BYTES(inner->rtype))
            coerce_to_register_pair(output, inner->rtype, outputReg, outputRegHi);
        else
            ENSURE_GPR(output, inner->rtype, outputReg);
    } else if (!IS_TYPE_VOID(inner->rtype)) {
        CError_FATAL(681);
    }
}

void gen_MUL(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    ENode *left;
    ENode *right;
    Type *type;
    int tmp;

    left = expr->data.diadic.left;
    right = expr->data.diadic.right;
    type = expr->rtype;

    if (TYPE_IS_8BYTES(type)) {
        I8_gen_MUL(expr, outputReg, outputRegHi, output);
        return;
    }

    if (IS_TYPE_FLOAT(type)) {
        fp_binary_operator((type->size == 4) ? PC_FMULS : PC_FMUL, left, right, outputReg, output);
        return;
    }

    if (ENODE_IS(right, EINTCONST) && (tmp = ispowerof2(right->data.intval.lo))) {
        shift_left_immediate(left, tmp, 0, outputReg, output);
    } else if (ENODE_IS(right, EINTCONST) && (tmp = ispowerof2(-right->data.intval.lo))) {
        shift_left_immediate(left, tmp, 1, outputReg, output);
    } else if (ENODE_IS(left, EINTCONST) && (tmp = ispowerof2(left->data.intval.lo))) {
        shift_left_immediate(right, tmp, 0, outputReg, output);
    } else if (ENODE_IS(left, EINTCONST) && (tmp = ispowerof2(-left->data.intval.lo))) {
        shift_left_immediate(right, tmp, 1, outputReg, output);
    } else if (ENODE_IS(right, EINTCONST) && FITS_IN_SHORT(right->data.intval.lo)) {
        binary_immediate(PC_MULLI, left, right->data.intval.lo, outputReg, output);
    } else if (ENODE_IS(left, EINTCONST) && FITS_IN_SHORT(left->data.intval.lo)) {
        binary_immediate(PC_MULLI, right, left->data.intval.lo, outputReg, output);
    } else {
        binary_operator(PC_MULLW, left, right, outputReg, output);
    }
}

struct ms {
    SInt32 m;
    int s;
};
static void create_signed_magic(SInt32 val, struct ms *output) {
    // PowerPC CWG page 57-58
    int p;
    UInt32 ad, anc, delta, q1, r1, q2, r2, t;

    ad = abs(val);
    t = 0x80000000U + ((UInt32) val >> 31);
    anc = t - 1 - t % ad;
    p = 31;
    q1 = 0x80000000U / anc;
    r1 = 0x80000000U - q1 * anc;
    q2 = 0x80000000U / ad;
    r2 = 0x80000000U - q2 * ad;

    do {
        p = p + 1;
        q1 = 2 * q1;
        r1 = 2 * r1;
        if (r1 >= anc) {
            q1 = q1 + 1;
            r1 = r1 - anc;
        }
        q2 = 2 * q2;
        r2 = 2 * r2;
        if (r2 >= ad) {
            q2 = q2 + 1;
            r2 = r2 - ad;
        }
        delta = ad - r2;
    } while (q1 < delta || (q1 == delta && r1 == 0));

    // after loop
    output->m = q2 + 1;
    if (val < 0)
        output->m = -output->m;
    output->s = p - 32;
}

struct mu {
    UInt32 m;
    int a;
    int s;
};
static void create_unsigned_magic(UInt32 val, struct mu *output) {
    // PowerPC CWG page 58-59
    int p;
    UInt32 nc, delta, q1, r1, q2, r2;

    output->a = 0;
    nc = - 1 - (-val) % val;
    p = 31;
    q1 = 0x80000000U / nc;
    r1 = 0x80000000U - q1 * nc;
    q2 = 0x7FFFFFFFU / val;
    r2 = 0x7FFFFFFFU - q2 * val;
    do {
        p = p + 1;
        if (r1 >= nc - r1) {
            q1 = 2 * q1 + 1;
            r1 = 2 * r1 - nc;
        } else {
            q1 = 2 * q1;
            r1 = 2 * r1;
        }
        if (r2 + 1 >= val - r2) {
            if (q2 >= 0x7FFFFFFFU)
                output->a = 1;
            q2 = 2 * q2 + 1;
            r2 = 2 * r2 + 1 - val;
        } else {
            if (q2 >= 0x80000000U)
                output->a = 1;
            q2 = 2 * q2;
            r2 = 2 * r2 + 1;
        }
        delta = val - 1 - r2;
    } while (p < 64 && (q1 < delta || (q1 == delta && r1 == 0)));

    output->m = q2 + 1;
    output->s = p - 32;
}

void gen_DIV(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    ENode *left;
    ENode *right;
    Type *type;
    int tmp;

    left = expr->data.diadic.left;
    right = expr->data.diadic.right;
    type = expr->rtype;

    if (TYPE_IS_8BYTES(type)) {
        I8_gen_DIV_MOD(expr, outputReg, outputRegHi, output);
        return;
    }

    if (IS_TYPE_FLOAT(type)) {
        fp_binary_operator((type->size == 4) ? PC_FDIVS : PC_FDIV, left, right, outputReg, output);
        return;
    }

    if (is_unsigned(type)) {
        if (ENODE_IS(right, EINTCONST) && (tmp = ispowerof2(right->data.intval.lo))) {
            shift_right_immediate(left, type, tmp, outputReg, output);
        } else if (!copts.optimize_for_size && ENODE_IS(right, EINTCONST) && right->data.intval.lo != 1) {
            SInt32 value;
            int tmpreg1;
            int tmpreg2;
            int tmpreg3;
            int tmpreg4;
            int tmpreg5;
            int tmpreg6;
            int finalReg;
            struct mu u_magicoutput;
            Operand op1;
            value = right->data.intval.lo;
            tmpreg1 = ALLOC_GPR();
            tmpreg2 = ALLOC_GPR();
            finalReg = outputReg ? outputReg : ALLOC_GPR();

            memclrw(&op1, sizeof(Operand));
            GEN_NODE(left, &op1);
            ENSURE_GPR(&op1, left->rtype, 0);

            tmpreg3 = op1.reg;
            create_unsigned_magic(value, &u_magicoutput);
            load_immediate(tmpreg2, u_magicoutput.m);
            emitpcode(PC_MULHWU, tmpreg1, tmpreg2, tmpreg3);
            if (u_magicoutput.a == 0) {
                if (u_magicoutput.s)
                    emitpcode(PC_RLWINM, finalReg, tmpreg1, (32 - u_magicoutput.s) & 31, u_magicoutput.s, 31);
                else
                    emitpcode(PC_MR, finalReg, tmpreg1);
            } else if (u_magicoutput.a == 1) {
                tmpreg4 = ALLOC_GPR();
                if (copts.optimizationlevel > 1) {
                    tmpreg5 = ALLOC_GPR();
                    tmpreg6 = ALLOC_GPR();
                } else {
                    tmpreg5 = tmpreg4;
                    tmpreg6 = tmpreg4;
                }

                emitpcode(PC_SUBF, tmpreg4, tmpreg1, tmpreg3);
                emitpcode(PC_RLWINM, tmpreg5, tmpreg4, 31, 1, 31);
                emitpcode(PC_ADD, tmpreg6, tmpreg5, tmpreg1);
                emitpcode(PC_RLWINM, finalReg, tmpreg6, (32 - (u_magicoutput.s - 1)) & 31, u_magicoutput.s - 1, 31);
            }

            output->optype = OpndType_GPR;
            output->reg = finalReg;
        } else {
            binary_operator(PC_DIVWU, left, right, outputReg, output);
        }
    } else {
        SInt32 value;
        if (ENODE_IS(right, EINTCONST) && (tmp = ispowerof2(right->data.intval.lo))) {
            signed_divide_by_power_of_2(left, tmp, 0, outputReg, output);
        } else if (ENODE_IS(right, EINTCONST) && (tmp = ispowerof2(-right->data.intval.lo))) {
            signed_divide_by_power_of_2(left, tmp, 1, outputReg, output);
        } else if (!copts.optimize_for_size && ENODE_IS(right, EINTCONST) && (value = right->data.intval.lo) != 1u && value != -1) {
            int tmpreg2;
            int tmpreg3;
            int tmpreg1;
            int tmpreg4;
            int finalReg;
            struct ms s_magicoutput;
            Operand op2;
            value = right->data.intval.lo;
            tmpreg1 = ALLOC_GPR();
            tmpreg2 = ALLOC_GPR();
            tmpreg3 = ALLOC_GPR();
            finalReg = outputReg ? outputReg : ALLOC_GPR();

            memclrw(&op2, sizeof(Operand));
            GEN_NODE(left, &op2);
            ENSURE_GPR(&op2, left->rtype, 0);

            tmpreg4 = op2.reg;
            create_signed_magic(value, &s_magicoutput);
            load_immediate(tmpreg2, s_magicoutput.m);
            emitpcode(PC_MULHW, tmpreg1, tmpreg2, tmpreg4);
            if (value > 0 && s_magicoutput.m < 0) {
                int t = ALLOC_GPR();
                emitpcode(PC_ADD, t, tmpreg1, tmpreg4);
                tmpreg1 = t;
            } else if (value < 0 && s_magicoutput.m > 0) {
                int t = ALLOC_GPR();
                emitpcode(PC_SUBF, t, tmpreg4, tmpreg1);
                tmpreg1 = t;
            }

            if (s_magicoutput.s) {
                int t = ALLOC_GPR();
                emitpcode(PC_SRAWI, t, tmpreg1, s_magicoutput.s);
                tmpreg1 = t;
            }

            emitpcode(PC_RLWINM, tmpreg3, tmpreg1, 1, 31, 31);
            emitpcode(PC_ADD, finalReg, tmpreg1, tmpreg3);

            output->optype = OpndType_GPR;
            output->reg = finalReg;
        } else {
            binary_operator(PC_DIVW, left, right, outputReg, output);
        }
    }
}

void gen_MODULO(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    ENode *left;
    ENode *right;
    int tmp;
    struct mu u_magicoutput;
    struct ms s_magicoutput;
    Operand op1;
    Operand op2;
    SInt32 value;

    left = expr->data.diadic.left;
    right = expr->data.diadic.right;
    memclrw(&op1, sizeof(Operand));
    memclrw(&op2, sizeof(Operand));

    if (TYPE_IS_8BYTES(expr->rtype)) {
        I8_gen_DIV_MOD(expr, outputReg, outputRegHi, output);
        return;
    }

    if (ENODE_IS(right, EINTCONST) && (tmp = ispowerof2(right->data.intval.lo))) {
        if (is_unsigned(expr->rtype))
            shift_and_mask(left, 0, 32 - tmp, 31, outputReg, output);
        else
            signed_mod_by_power_of_2(left, tmp, 0, outputReg, output);
    } else if (!copts.optimize_for_size && ENODE_IS(right, EINTCONST) && (value = right->data.intval.lo) != 1u && value != -1) {
        GEN_NODE(left, &op1);
        ENSURE_GPR(&op1, left->rtype, 0);

        if (is_unsigned(expr->rtype)) {
            int tmpreg1;
            int tmpreg2;
            int tmpreg3;
            int tmpreg4;
            int tmpreg5;
            int tmpreg6;
            int tmpreg7;
            int tmpreg8;
            int finalReg;

            tmpreg1 = op1.reg;
            tmpreg2 = ALLOC_GPR();
            tmpreg3 = ALLOC_GPR();
            tmpreg4 = ALLOC_GPR();
            finalReg = outputReg ? outputReg : ALLOC_GPR();

            create_unsigned_magic(right->data.intval.lo, &u_magicoutput);
            load_immediate(tmpreg3, u_magicoutput.m);
            emitpcode(PC_MULHWU, tmpreg2, tmpreg3, tmpreg1);

            if (u_magicoutput.a == 0 && u_magicoutput.s != 0)
                emitpcode(PC_RLWINM, tmpreg2, tmpreg2, (32 - u_magicoutput.s) & 31, u_magicoutput.s, 31);

            if (u_magicoutput.a == 1) {
                tmpreg5 = ALLOC_GPR();
                if (copts.optimizationlevel > 1) {
                    tmpreg6 = ALLOC_GPR();
                    tmpreg7 = ALLOC_GPR();
                    tmpreg8 = ALLOC_GPR();
                } else {
                    tmpreg6 = tmpreg5;
                    tmpreg7 = tmpreg5;
                    tmpreg8 = tmpreg5;
                }
                emitpcode(PC_SUBF, tmpreg5, tmpreg2, tmpreg1);
                emitpcode(PC_RLWINM, tmpreg6, tmpreg5, 31, 1, 31);
                emitpcode(PC_ADD, tmpreg7, tmpreg6, tmpreg2);
                emitpcode(PC_RLWINM, tmpreg8, tmpreg7, (32 - (u_magicoutput.s - 1)) & 31, u_magicoutput.s - 1, 31);
                tmpreg2 = tmpreg8;
            }

            if (value > 0 && value < 0x7FFF) {
                emitpcode(PC_MULLI, tmpreg4, tmpreg2, value);
            } else {
                GEN_NODE(right, &op2);
                ENSURE_GPR(&op2, right->rtype, 0);
                emitpcode(PC_MULLW, tmpreg4, tmpreg2, op2.reg);
            }

            emitpcode(PC_SUBF, finalReg, tmpreg4, tmpreg1);
            output->optype = OpndType_GPR;
            output->reg = finalReg;
        } else {
            int tmpreg1;
            int tmpreg2;
            int tmpreg3;
            int tmpreg4;
            int tmpreg5;
            int tmpreg6;
            int finalReg;

            tmpreg1 = op1.reg;
            tmpreg2 = ALLOC_GPR();
            tmpreg3 = ALLOC_GPR();
            tmpreg4 = ALLOC_GPR();
            tmpreg5 = ALLOC_GPR();
            tmpreg6 = ALLOC_GPR();
            finalReg = outputReg ? outputReg : ALLOC_GPR();

            create_signed_magic(right->data.intval.lo, &s_magicoutput);
            load_immediate(tmpreg3, s_magicoutput.m);
            emitpcode(PC_MULHW, tmpreg2, tmpreg3, tmpreg1);

            if (value > 0 && s_magicoutput.m < 0) {
                int tmp = ALLOC_GPR();
                emitpcode(PC_ADD, tmp, tmpreg2, tmpreg1);
                tmpreg2 = tmp;
            } else if (value < 0 && s_magicoutput.m > 0) {
                int tmp = ALLOC_GPR();
                emitpcode(PC_SUBF, tmp, tmpreg1, tmpreg2);
                tmpreg2 = tmp;
            }

            if (s_magicoutput.s != 0) {
                int tmp = ALLOC_GPR();
                emitpcode(PC_SRAWI, tmp, tmpreg2, s_magicoutput.s);
                tmpreg2 = tmp;
            }

            emitpcode(PC_RLWINM, tmpreg4, tmpreg2, 1, 31, 31);
            emitpcode(PC_ADD, tmpreg5, tmpreg2, tmpreg4);

            if (value < 0x7FFF && value > -0x4000) {
                emitpcode(PC_MULLI, tmpreg6, tmpreg5, value);
            } else {
                GEN_NODE(right, &op2);
                ENSURE_GPR(&op2, right->rtype, 0);

                emitpcode(PC_MULLW, tmpreg6, tmpreg5, op2.reg);
            }

            emitpcode(PC_SUBF, finalReg, tmpreg6, tmpreg1);
            output->optype = OpndType_GPR;
            output->reg = finalReg;
        }
    } else {
        int tmpreg1;
        int tmpreg2;
        int finalReg;

        if (right->hascall) {
            GEN_NODE(right, &op2);
            ENSURE_GPR(&op2, right->rtype, 0);
            GEN_NODE(left, &op1);
            ENSURE_GPR(&op1, left->rtype, 0);
        } else {
            GEN_NODE(left, &op1);
            ENSURE_GPR(&op1, left->rtype, 0);
            GEN_NODE(right, &op2);
            ENSURE_GPR(&op2, right->rtype, 0);
        }

        tmpreg1 = ALLOC_GPR();
        tmpreg2 = ALLOC_GPR();
        finalReg = outputReg ? outputReg : ALLOC_GPR();

        emitpcode(is_unsigned(expr->rtype) ? PC_DIVWU : PC_DIVW, tmpreg1, op1.reg, op2.reg);
        emitpcode(PC_MULLW, tmpreg2, tmpreg1, op2.reg);
        emitpcode(PC_SUBF, finalReg, tmpreg2, op1.reg);

        output->optype = OpndType_GPR;
        output->reg = finalReg;
    }
}

void gen_ADD(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    ENode *left;
    ENode *right;
    Type *type;
    Operand opleft;
    Operand opright;

    left = expr->data.diadic.left;
    right = expr->data.diadic.right;
    type = expr->rtype;

    memclrw(&opleft, sizeof(Operand));
    memclrw(&opright, sizeof(Operand));

    if (TYPE_IS_8BYTES(type)) {
        I8_gen_ADD(expr, outputReg, outputRegHi, output);
        return;
    }

    if (IS_TYPE_FLOAT(type)) {
        if (ENODE_IS(left, EMUL) && copts.fp_contract) {
            fp_multiply_add(
                    (type->size == 4) ? PC_FMADDS : PC_FMADD,
                    left->data.diadic.left,
                    left->data.diadic.right,
                    right,
                    outputReg, output);
        } else if (ENODE_IS(right, EMUL) && copts.fp_contract) {
            fp_multiply_add(
                    (type->size == 4) ? PC_FMADDS : PC_FMADD,
                    right->data.diadic.left,
                    right->data.diadic.right,
                    left,
                    outputReg, output);
        } else {
            fp_binary_operator(
                    (type->size == 4) ? PC_FADDS : PC_FADD,
                    left, right,
                    outputReg, output);
        }
        return;
    }

    if (right->hascall) {
        GEN_NODE(right, &opright);
        if (opright.optype >= OpndType_IndirectGPR_ImmOffset)
            ENSURE_GPR(&opright, right->rtype, 0);

        GEN_NODE(left, &opleft);
        if (opleft.optype >= OpndType_IndirectGPR_ImmOffset)
            ENSURE_GPR(&opleft, left->rtype, 0);
    } else {
        GEN_NODE(left, &opleft);
        if (opleft.optype >= OpndType_IndirectGPR_ImmOffset)
            ENSURE_GPR(&opleft, left->rtype, 0);

        GEN_NODE(right, &opright);
        if (opright.optype >= OpndType_IndirectGPR_ImmOffset)
            ENSURE_GPR(&opright, right->rtype, 0);
    }

    if (IS_TYPE_POINTER(expr->rtype)) {
        if (TYPE_IS_8BYTES(expr->data.diadic.left->rtype)) {
            opleft.optype = OpndType_GPR;
            opleft.regHi = 0;
        }
        if (TYPE_IS_8BYTES(expr->data.diadic.right->rtype)) {
            opright.optype = OpndType_GPR;
            opright.regHi = 0;
        }
    }

    combine(&opleft, &opright, outputReg, output);
}

void gen_SUB(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    ENode *left;
    ENode *right;
    Type *type;

    left = expr->data.diadic.left;
    right = expr->data.diadic.right;
    type = expr->rtype;

    if (TYPE_IS_8BYTES(type)) {
        I8_gen_SUB(expr, outputReg, outputRegHi, output);
        return;
    }

    if (IS_TYPE_FLOAT(type)) {
        if (ENODE_IS(left, EMUL) && copts.fp_contract) {
            fp_multiply_add(
                    (type->size == 4) ? PC_FMSUBS : PC_FMSUB,
                    left->data.diadic.left,
                    left->data.diadic.right,
                    right,
                    outputReg, output);
        } else if (ENODE_IS(right, EMUL) && copts.fp_contract) {
            fp_multiply_add(
                    (type->size == 4) ? PC_FNMSUBS : PC_FNMSUB,
                    right->data.diadic.left,
                    right->data.diadic.right,
                    left,
                    outputReg, output);
        } else {
            fp_binary_operator(
                    (type->size == 4) ? PC_FSUBS : PC_FSUB,
                    left, right,
                    outputReg, output);
        }
        return;
    }

    if (ENODE_IS(left, EINTCONST) && FITS_IN_SHORT(left->data.intval.lo))
        binary_immediate(PC_SUBFIC, right, left->data.intval.lo, outputReg, output);
    else
        binary_operator(PC_SUBF, right, left, outputReg, output);
}

void gen_SHL(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    Type *type;
    ENode *left;
    ENode *right;

    left = expr->data.diadic.left;
    right = expr->data.diadic.right;
    type = expr->rtype;

    if (TYPE_IS_8BYTES(type)) {
        I8_gen_SHL_SHR(expr, outputReg, outputRegHi, output);
        return;
    }

    if (ENODE_IS(right, EINTCONST))
        shift_left_immediate(left, right->data.intval.lo, 0, outputReg, output);
    else
        binary_operator(PC_SLW, left, right, outputReg, output);
}

void gen_SHR(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    Type *type;
    ENode *left;
    ENode *right;

    left = expr->data.diadic.left;
    right = expr->data.diadic.right;
    type = expr->rtype;

    if (TYPE_IS_8BYTES(type)) {
        I8_gen_SHL_SHR(expr, outputReg, outputRegHi, output);
        return;
    }

    if (ENODE_IS(right, EINTCONST))
        shift_right_immediate(left, type, right->data.intval.lo, outputReg, output);
    else
        binary_operator(is_unsigned(type) ? PC_SRW : PC_SRAW, left, right, outputReg, output);
}

void gen_AND(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    Type *type;
    ENode *left;
    ENode *right;
    short first;
    short last;

    left = expr->data.diadic.left;
    right = expr->data.diadic.right;
    type = expr->rtype;

    if (TYPE_IS_8BYTES(type)) {
        I8_gen_AND(expr, outputReg, outputRegHi, output);
        return;
    }

    if (ENODE_IS(right, EINTCONST) && ismaskconstant(right->data.intval.lo, &first, &last)) {
        if (ENODE_IS(left, ESHL) && ENODE_IS(left->data.diadic.right, EINTCONST) && (int)(left->data.diadic.right->data.intval.lo + last) < 32) {
            shift_and_mask(
                    left->data.diadic.left,
                    left->data.diadic.right->data.intval.lo,
                    first, last,
                    outputReg, output);
        } else if (ENODE_IS(left, ESHR) && ENODE_IS(left->data.diadic.right, EINTCONST) && (int)left->data.diadic.right->data.intval.lo <= first && last >= first) {
            if (left->data.diadic.right->data.intval.lo == 0)
                shift_and_mask(left->data.diadic.left, 0, first, last, outputReg, output);
            else
                shift_and_mask(left->data.diadic.left, 32 - left->data.diadic.right->data.intval.lo, first, last, outputReg, output);
        } else {
            shift_and_mask(left, 0, first, last, outputReg, output);
        }
        return;
    }

    if (ENODE_IS(right, EINTCONST) && FITS_IN_USHORT(right->data.intval.lo)) {
        binary_immediate(PC_ANDI, left, right->data.intval.lo, outputReg, output);
        return;
    }
    if (ENODE_IS(right, EINTCONST) && FITS_IN_HI_SHORT(right->data.intval.lo)) {
        binary_immediate(PC_ANDIS, left, right->data.intval.lo >> 16, outputReg, output);
        return;
    }

    if (ENODE_IS(left, EINTCONST) && ismaskconstant(left->data.intval.lo, &first, &last)) {
        if (ENODE_IS(right, ESHL) && ENODE_IS(right->data.diadic.right, EINTCONST) && (int)(right->data.diadic.right->data.intval.lo + last) < 32) {
            shift_and_mask(
                    right->data.diadic.left,
                    right->data.diadic.right->data.intval.lo,
                    first, last,
                    outputReg, output);
        } else if (ENODE_IS(right, ESHR) && ENODE_IS(right->data.diadic.right, EINTCONST) && (int)right->data.diadic.right->data.intval.lo <= first) {
            if (right->data.diadic.right->data.intval.lo == 0)
                shift_and_mask(right->data.diadic.left, 0, first, last, outputReg, output);
            else
                shift_and_mask(right->data.diadic.left, 32 - right->data.diadic.right->data.intval.lo, first, last, outputReg, output);
        } else {
            shift_and_mask(right, 0, first, last, outputReg, output);
        }
        return;
    }

    if (ENODE_IS(left, EINTCONST) && FITS_IN_USHORT(left->data.intval.lo)) {
        binary_immediate(PC_ANDI, right, left->data.intval.lo, outputReg, output);
        return;
    }
    if (ENODE_IS(left, EINTCONST) && FITS_IN_HI_SHORT(left->data.intval.lo)) {
        binary_immediate(PC_ANDIS, right, left->data.intval.lo >> 16, outputReg, output);
        return;
    }

    if (ENODE_IS(right, EBINNOT))
        binary_operator(PC_ANDC, left, right->data.monadic, outputReg, output);
    else if (ENODE_IS(left, EBINNOT))
        binary_operator(PC_ANDC, right, left->data.monadic, outputReg, output);
    else
        binary_operator(PC_AND, left, right, outputReg, output);
}

void gen_XOR(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    Type *type;
    ENode *left;
    ENode *right;

    left = expr->data.diadic.left;
    right = expr->data.diadic.right;
    type = expr->rtype;

    if (TYPE_IS_8BYTES(type)) {
        I8_gen_XOR(expr, outputReg, outputRegHi, output);
        return;
    }

    if (ENODE_IS(left, EINTCONST))
        or_xor_immediate(PC_XORI, right, left->data.intval.lo, outputReg, output);
    else if (ENODE_IS(right, EINTCONST))
        or_xor_immediate(PC_XORI, left, right->data.intval.lo, outputReg, output);
    else if (ENODE_IS(right, EBINNOT))
        binary_operator(PC_EQV, left, right->data.monadic, outputReg, output);
    else if (ENODE_IS(left, EBINNOT))
        binary_operator(PC_EQV, left->data.monadic, right, outputReg, output);
    else
        binary_operator(PC_XOR, left, right, outputReg, output);
}

void gen_OR(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    Type *type;
    ENode *left;
    ENode *right;

    left = expr->data.diadic.left;
    right = expr->data.diadic.right;
    type = expr->rtype;

    if (TYPE_IS_8BYTES(type)) {
        I8_gen_OR(expr, outputReg, outputRegHi, output);
        return;
    }

    if (ENODE_IS(left, EINTCONST))
        or_xor_immediate(PC_ORI, right, left->data.intval.lo, outputReg, output);
    else if (ENODE_IS(right, EINTCONST))
        or_xor_immediate(PC_ORI, left, right->data.intval.lo, outputReg, output);
    else if (ENODE_IS(right, EBINNOT))
        binary_operator(PC_ORC, left, right->data.monadic, outputReg, output);
    else if (ENODE_IS(left, EBINNOT))
        binary_operator(PC_ORC, right, left->data.monadic, outputReg, output);
    else
        binary_operator(PC_OR, left, right, outputReg, output);
}

void gen_ASS(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    Type *type;
    ENode *left;
    ENode *right;
    Operand opleft;
    Operand opright;
    Operand op2;
    VarInfo *vi;
    SInt32 incval;
    short align;
    short align2;

    type = expr->rtype;
    if (ENODE_IS(expr, ECONDASS)) {
        left = expr->data.cond.expr1;
        if (ENODE_IS(left, EINDIRECT)) {
            left = left->data.monadic;
        } else {
            CError_FATAL(1759);
        }
        right = expr->data.cond.expr2;
    } else {
        left = expr->data.diadic.left;
        right = expr->data.diadic.right;
    }

    memclrw(&opleft, sizeof(Operand));
    memclrw(&opright, sizeof(Operand));
    memclrw(&op2, sizeof(Operand));

    if (TYPE_IS_8BYTES(type)) {
        I8_gen_ASS(expr, outputReg, outputRegHi, output);
        return;
    }

    if (ENODE_IS(left, EOBJREF) && OBJECT_REG(left->data.objref)) {
        vi = Registers_GetVarInfo(left->data.objref);
        GEN_NODE_TO_REG(right, vi->reg, 0, &opright);
        switch (vi->rclass) {
            case RegClass_GPR:
                ENSURE_GPR(&opright, type, vi->reg);
                output->optype = OpndType_GPR;
                break;
            case RegClass_FPR:
                ENSURE_FPR(&opright, type, vi->reg);
                output->optype = OpndType_FPR;
                break;
            case RegClass_VR:
                ENSURE_VR(&opright, type, vi->reg);
                output->optype = OpndType_VR;
                break;
            default:
                CError_FATAL(1810);
        }
        if (opright.reg != vi->reg) {
            PCodeArg a, b;
            a.kind = PCOp_REGISTER;
            a.arg = vi->rclass;
            a.data.reg.reg = vi->reg;
            a.data.reg.effect = EffectWrite;
            b.kind = PCOp_REGISTER;
            b.arg = vi->rclass;
            b.data.reg.reg = opright.reg;
            b.data.reg.effect = EffectRead;
            appendpcode(pclastblock, makecopyinstruction(&b, &a));
        }
        output->reg = vi->reg;
        return;
    }

    if (IS_TYPE_FLOAT(type)) {
        GEN_NODE_TO_FPR(right, &opright, right->rtype, 0);
        if (ispostincrementopportunity(left, &opleft, &incval)) {
            indirect(&opleft, expr);
            store_fp(opright.reg, &opleft, type);
            add_register_immediate(opleft.reg, opleft.reg, incval);
        } else {
            GEN_NODE(left, &opleft);
            indirect(&opleft, expr);
            store_fp(opright.reg, &opleft, type);
        }
        output->optype = OpndType_FPR;
        output->reg = opright.reg;
        return;
    }

    if (IS_TYPE_VECTOR(type)) {
        GEN_NODE(right, &opright);
        if (opright.optype == OpndType_Absolute)
            ENSURE_VR(&opright, type, 0);
        else
            ENSURE_VR(&opright, right->rtype, 0);

        if (ispostincrementopportunity(left, &opleft, &incval)) {
            indirect(&opleft, expr);
            store_v(opright.reg, &opleft, type);
            add_register_immediate(opleft.reg, opleft.reg, incval);
        } else {
            GEN_NODE(left, &opleft);
            indirect(&opleft, expr);
            store_v(opright.reg, &opleft, type);
        }
        output->optype = OpndType_VR;
        output->reg = opright.reg;
        return;
    }

    if (TYPE_FITS_IN_REGISTER(type)) {
        GEN_NODE_TO_GPR(right, &opright, right->rtype, 0);

        if (ENODE_IS(left, EBITFIELD)) {
            GEN_NODE(left->data.monadic, &opleft);
            indirect(&opleft, expr);

            op2 = opleft;
            ENSURE_GPR(&op2, type, 0);
            insert_bitfield(opright.reg, &op2, TYPE_BITFIELD(left->rtype));
            store(op2.reg, &opleft, type);

            if (!expr->ignored)
                extract_bitfield(&op2, TYPE_BITFIELD(left->rtype), opright.reg, &opleft);
        } else if (ispostincrementopportunity(left, &opleft, &incval)) {
            indirect(&opleft, expr);
            store(opright.reg, &opleft, type);
            add_register_immediate(opleft.reg, opleft.reg, incval);
        } else {
            GEN_NODE(left, &opleft);
            indirect(&opleft, expr);
            store(opright.reg, &opleft, type);
        }

        output->optype = OpndType_GPR;
        output->reg = opright.reg;
        return;
    }

    GEN_NODE(right, &opright);
    GEN_NODE(left, output);

    indirect(output, expr);
    if (output->object) {
        if (output->object->datatype == DLOCAL && (output->object->u.var.info->flags & VarInfoFlag1))
            align = CMach_ArgumentAlignment(type);
        else
            align = CMach_AllocationAlignment(type, output->object->qual);
    } else {
        align = CMach_AllocationAlignment(type, 0);
    }
    if (opright.object) {
        if (opright.object->datatype == DLOCAL && (opright.object->u.var.info->flags & VarInfoFlag1))
            align2 = CMach_ArgumentAlignment(type);
        else
            align2 = CMach_AllocationAlignment(type, opright.object->qual);
    } else {
        align2 = CMach_AllocationAlignment(type, 0);
    }

    if (align2 < align)
        align = align2;

    move_block(output, &opright, type->size, align);
}

ENode *evaluate_and_skip_comma(ENode *expr) {
    Operand op;
    ENode *inner;

    memclrw(&op, sizeof(Operand));
    while (ENODE_IS(expr, ECOMMA)) {
        inner = expr->data.diadic.left;
        GEN_NODE(inner, &op);
        if (ENODE_IS(inner, EINDIRECT) && (op.flags & OpndFlags_Volatile)) {
            if (TYPE_FITS_IN_REGISTER_2(inner->rtype)) {
                ENSURE_GPR(&op, inner->rtype, 0);
            } else if (IS_TYPE_FLOAT(inner->rtype)) {
                ENSURE_FPR(&op, inner->rtype, 0);
            }
        }
        expr = expr->data.diadic.right;
    }
    return expr;
}

void gen_COMMA(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    ENode *left;
    ENode *right;

    left = expr->data.diadic.left;
    right = expr->data.diadic.right;
    GEN_NODE(left, output);

    if (ENODE_IS(left, EINDIRECT) && (output->flags & OpndFlags_Volatile)) {
        if (TYPE_FITS_IN_REGISTER_2(left->rtype)) {
            ENSURE_GPR(output, left->rtype, 0);
        } else if (IS_TYPE_FLOAT(left->rtype)) {
            ENSURE_FPR(output, left->rtype, 0);
        }
    }

    GEN_NODE_TO_REG(right, outputReg, 0, output);
}

void gen_TYPCON(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    ENode *inner;
    Type *srctype;
    Type *dsttype;

    inner = expr->data.monadic;
    srctype = inner->rtype;
    dsttype = expr->rtype;

    if (TYPE_IS_8BYTES(srctype) || TYPE_IS_8BYTES(dsttype)) {
        I8_gen_TYPCON(expr, outputReg, outputRegHi, output);
        return;
    }

    if (IS_TYPE_VOID(dsttype)) {
        GEN_NODE(inner, output);
        if (ENODE_IS(inner, EINDIRECT) && (output->flags & OpndFlags_Volatile)) {
            if (TYPE_FITS_IN_REGISTER_2(srctype)) {
                ENSURE_GPR(output, srctype, 0);
            } else if (IS_TYPE_FLOAT(srctype)) {
                ENSURE_FPR(output, srctype, 0);
            }
        }
    } else if (IS_TYPE_INT_OR_ENUM(srctype)) {
        if (IS_TYPE_FLOAT(dsttype)) {
            GEN_NODE(inner, output);
            if (srctype->size < 4)
                extend32(output, srctype, 0);
            ENSURE_GPR(output, srctype, 0);

            if (is_unsigned(srctype))
                convert_unsigned_to_floating(output, dsttype->size == 4, outputReg);
            else
                convert_integer_to_floating(output, dsttype->size == 4, outputReg);
        } else if (IS_TYPE_VECTOR(dsttype)) {
            GEN_NODE_TO_REG(inner, outputReg, 0, output);
            ENSURE_VR(output, dsttype, outputReg);
        } else if (
                srctype->size < dsttype->size &&
                !ENODE_IS_INDIRECT_TO(inner, EBITFIELD) &&
                !ENODE_IS_ASSIGN_TO(inner, EBITFIELD) &&
                !(ENODE_IS_RANGE(inner, EPOSTINC, EPREDEC) && ENODE_IS(inner->data.monadic->data.monadic, EBITFIELD))
                ) {
            GEN_NODE(inner, output);
            extend32(output, srctype, outputReg);
        } else if (dsttype->size < srctype->size || dsttype->size < 4) {
            GEN_NODE(inner, output);
            ENSURE_GPR(output, srctype, 0);
            extend32(output, dsttype, outputReg);
        } else {
            GEN_NODE_TO_REG(inner, outputReg, 0, output);
        }
    } else if (IS_TYPE_POINTER(srctype)) {
        GEN_NODE_TO_REG(inner, outputReg, 0, output);
        if (dsttype->size < srctype->size)
            ENSURE_GPR(output, srctype, outputReg);
    } else if (IS_TYPE_FLOAT(srctype)) {
        if (IS_TYPE_FLOAT(dsttype)) {
            GEN_NODE_TO_REG(inner, outputReg, 0, output);
            ENSURE_FPR(output, srctype, outputReg);

            if (dsttype->size == 4 && srctype->size != 4) {
                int tmp = outputReg ? outputReg : ALLOC_FPR();
                emitpcode(PC_FRSP, tmp, output->reg);
                output->optype = OpndType_FPR;
                output->reg = tmp;
            }
        } else if (is_unsigned(dsttype) && dsttype->size == 4) {
            GEN_NODE_TO_REG(inner, 1, 0, output);
            ENSURE_FPR(output, srctype, 1);
            convert_floating_to_unsigned(output, outputReg);
        } else {
            GEN_NODE_TO_REG(inner, 0, 0, output);
            ENSURE_FPR(output, srctype, 0);
            convert_floating_to_integer(output, outputReg);
        }
    } else if (IS_TYPE_VECTOR(srctype) && IS_TYPE_VECTOR(dsttype)) {
        GEN_NODE_TO_REG(inner, outputReg, 0, output);
        ENSURE_VR(output, srctype, outputReg);
    } else if (srctype->size == dsttype->size) {
        GEN_NODE_TO_REG(inner, outputReg, 0, output);
    } else {
        CError_FATAL(2224);
    }
}

void gen_BITFIELD(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    CError_FATAL(2238);
}

void gen_INTCONST(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    if (TYPE_IS_8BYTES(expr->rtype)) {
        I8_gen_INTCONST(expr, outputReg, outputRegHi, output);
        return;
    }

    output->optype = OpndType_Absolute;
    output->immediate = CInt64_GetULong(&expr->data.intval);
}

void gen_FLOATCONST(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    CError_FATAL(2294);
}

void gen_STRINGCONST(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    CError_FATAL(2308);
}

static Boolean COND_is_ABS_MatchNodes(ENode *cond, ENode *expr1, ENode *expr2) {
    if (cond->type != expr1->type || cond->type != expr2->type)
        return 0;

    if (!(TYPE_FITS_IN_REGISTER(cond->rtype) && TYPE_FITS_IN_REGISTER(expr1->rtype) && TYPE_FITS_IN_REGISTER(expr2->rtype)))
        return 0;

    if (cond->rtype->size != expr1->rtype->size || cond->rtype->size != expr2->rtype->size)
        return 0;

    switch (cond->type) {
        case EOBJREF:
            if (cond->data.objref != expr1->data.objref || cond->data.objref != expr2->data.objref)
                return 0;
            return 1;
        case EINDIRECT:
        case ETYPCON:
            return COND_is_ABS_MatchNodes(cond->data.monadic, expr1->data.monadic, expr2->data.monadic);
        default:
            return 0;
    }
}

static ENode *COND_is_ABS(ENode *cond, ENode *expr1, ENode *expr2) {
    ENode *tmp;

    int parity = 0;
    while (ENODE_IS(cond, ELOGNOT)) {
        parity = (parity + 1) & 1;
        cond = cond->data.monadic;
    }

    if (parity) {
        tmp = expr1;
        expr1 = expr2;
        expr2 = tmp;
    }

    switch (cond->type) {
        case ELESS:
        case ELESSEQU:
            tmp = expr1;
            expr1 = expr2;
            expr2 = tmp;
            break;
        case EGREATER:
        case EGREATEREQU:
            break;
        default:
            return NULL;
    }

    if (IS_INT_CONST_ZERO(cond->data.diadic.right)) {
        cond = cond->data.diadic.left;
    } else if (IS_INT_CONST_ZERO(cond->data.diadic.left)) {
        cond = cond->data.diadic.left;
        tmp = expr1;
        expr1 = expr2;
        expr2 = tmp;
    } else {
        return NULL;
    }

    if (ENODE_IS(expr1, EADD) && ENODE_IS(expr2, ESUB)) {
        if (COND_is_ABS_MatchNodes(cond, expr1->data.diadic.right, expr2->data.diadic.right))
            return expr1;
        else
            return NULL;
    }

    if (!ENODE_IS(expr2, EMONMIN))
        return NULL;

    expr2 = expr2->data.monadic;
    if (COND_is_ABS_MatchNodes(cond, expr1, expr2))
        return expr1;

    return NULL;
}

static int COND_has_const(ENode *expr1, ENode *expr2) {
    SInt32 diff;
    int result = 0;

    if (IS_INT_CONST(expr1))
        result += 1;
    if (IS_INT_CONST(expr2))
        result += 2;

    if (result & 1) {
        if (IS_INT_CONST_ZERO(expr1))
            return 5;
    }
    if (result & 2) {
        if (IS_INT_CONST_ZERO(expr2))
            return 6;
    }

    if (result == 3) {
        diff = expr1->data.intval.lo - expr2->data.intval.lo;
        if (diff == 1 || diff == -1)
            return 4;
    }

    return result;
}

static Boolean COND_is_COMPARE(ENode *cond, ENode *expr1, ENode *expr2, short outputReg, Operand *output) {
    SInt32 left;
    SInt32 right;
    int parity;
    int negate;
    ENodeType nt;

    while (ENODE_IS(expr1, ETYPCON) && TYPE_FITS_IN_REGISTER(expr1->rtype))
        expr1 = expr1->data.monadic;
    while (ENODE_IS(expr2, ETYPCON) && TYPE_FITS_IN_REGISTER(expr2->rtype))
        expr2 = expr2->data.monadic;

    if (!(ENODE_IS(expr1, EINTCONST) && TYPE_FITS_IN_REGISTER(expr1->rtype) && CInt64_IsInRange(expr1->data.intval, 4)))
        return 0;
    if (!(ENODE_IS(expr2, EINTCONST) && TYPE_FITS_IN_REGISTER(expr2->rtype) && CInt64_IsInRange(expr2->data.intval, 4)))
        return 0;

    left = CInt64_GetULong(&expr1->data.intval);
    right = CInt64_GetULong(&expr2->data.intval);
    parity = 0;
    negate = 0;
    switch (left) {
        case 1:
            if (right != 0)
                return 0;
            break;
        case 0:
            parity = 1;
            if (right == -1)
                negate = 1;
            else if (right != 1)
                return 0;
            break;
        case -1:
            if (right != 0)
                return 0;
            negate = 1;
            break;
        default:
            return 0;
    }

    while (ENODE_IS(cond, ELOGNOT)) {
        parity = (parity + 1) & 1;
        cond = cond->data.monadic;
    }

    if (parity) {
        nt = invert_relop(cond->type);
        if (nt == cond->type)
            return 0;
        cond->type = nt;
    }

    if (negate)
        gen_negated_condition_gpr(cond, output, outputReg);
    else
        gen_condition_gpr(cond, output, outputReg);

    return 1;
}

void gen_COND(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    ENode *cond;
    ENode *expr1;
    ENode *expr2;
    Type *type;
    PCodeLabel *label1;
    PCodeLabel *label2;
    PCodeLabel *label3;
    Operand op1;
    Operand op2;
    int has_const;
    int reg1;
    int reg2;
    int reg3;
    short align;
    short max_align;

    expr1 = expr->data.cond.expr1;
    expr2 = expr->data.cond.expr2;
    type = expr->rtype;

    label1 = makepclabel();
    label2 = makepclabel();
    label3 = makepclabel();

    memclrw(&op1, sizeof(Operand));
    memclrw(&op2, sizeof(Operand));

    cond = evaluate_and_skip_comma(expr->data.cond.cond);

    if (TOC_use_fsel(expr)) {
        ENode *left;
        ENode *right;
        ENode *tmp;
        ENodeType nt;
        Boolean flag;
        Operand op;
        int fneg_reg;
        int fneg_reg2;
        int fneg_reg3;
        int fsel_reg;
        int final_reg;

        left = cond->data.diadic.left;
        right = cond->data.diadic.right;
        nt = cond->type;
        flag = 0;
        memclrw(&op, sizeof(Operand));

        switch (nt) {
            case EGREATEREQU:
            case EEQU:
                break;
            case EGREATER:
                tmp = left;
                left = right;
                right = tmp;
            case ELESS:
            case ENOTEQU:
                tmp = expr1;
                expr1 = expr2;
                expr2  = tmp;
                break;
            case ELESSEQU:
                tmp = left;
                left = right;
                right = tmp;
                break;
            default:
                CError_FATAL(2780);
        }

        if (ENODE_IS(left, EFLOATCONST) && CMach_FloatIsZero(left->data.floatval)) {
            GEN_NODE(right, &op);
            ENSURE_FPR(&op, right->rtype, 0);
            flag = 1;
        } else if (ENODE_IS(right, EFLOATCONST) && CMach_FloatIsZero(right->data.floatval)) {
            GEN_NODE(left, &op);
            ENSURE_FPR(&op, left->rtype, 0);
        } else {
            fp_binary_operator((type->size == 4) ? PC_FSUBS : PC_FSUB, left, right, 0, &op);
        }

        switch (cond->type) {
            case EEQU:
            case ENOTEQU:
                if (flag) {
                    GEN_NODE_TO_FPR(expr1, &op1, expr1->rtype, 0);
                    GEN_NODE_TO_FPR(expr2, &op2, expr2->rtype, 0);

                    fneg_reg = ALLOC_FPR();
                    emitpcode(PC_FNEG, fneg_reg, op.reg);
                    fsel_reg = ALLOC_FPR();
                    emitpcode(PC_FSEL, fsel_reg, op.reg, op1.reg, op2.reg);
                    final_reg = outputReg ? outputReg : ALLOC_FPR();
                    emitpcode(PC_FSEL, final_reg, fneg_reg, fsel_reg, op2.reg);
                } else {
                    GEN_NODE_TO_FPR(expr1, &op1, expr1->rtype, 0);
                    GEN_NODE_TO_FPR(expr2, &op2, expr2->rtype, 0);

                    fneg_reg2 = ALLOC_FPR();
                    emitpcode(PC_FNEG, fneg_reg2, op.reg);
                    fsel_reg = ALLOC_FPR();
                    emitpcode(PC_FSEL, fsel_reg, op.reg, op1.reg, op2.reg);
                    final_reg = outputReg ? outputReg : ALLOC_FPR();
                    emitpcode(PC_FSEL, final_reg, fneg_reg2, fsel_reg, op2.reg);
                }
                break;
            case ELESS:
            case EGREATER:
            case ELESSEQU:
            case EGREATEREQU:
                GEN_NODE_TO_FPR(expr1, &op1, expr1->rtype, 0);
                GEN_NODE_TO_FPR(expr2, &op2, expr2->rtype, 0);

                fneg_reg3 = op.reg;
                if (flag) {
                    fneg_reg3 = ALLOC_FPR();
                    emitpcode(PC_FNEG, fneg_reg3, op.reg);
                }

                final_reg = outputReg ? outputReg : ALLOC_FPR();
                emitpcode(PC_FSEL, final_reg, fneg_reg3, op1.reg, op2.reg);
                break;
            default:
                CError_FATAL(2862);
        }

        output->optype = OpndType_FPR;
        output->reg = final_reg;
        return;
    }

    if (TOC_use_isel(expr, 1)) {
        Operand isel_op1;
        Operand isel_op2;
        ENode *x;
        ENode *y;
        ENode *abs_expr;

        memclrw(&isel_op1, sizeof(Operand));
        memclrw(&isel_op2, sizeof(Operand));

        if (COND_is_COMPARE(cond, expr1, expr2, outputReg, output))
            return;

        if ((abs_expr = COND_is_ABS(cond, expr1, expr2))) {
            if (ENODE_IS(expr1, EADD) && ENODE_IS(expr2, ESUB)) {
                x = expr1->data.diadic.left;
                y = expr2->data.diadic.right;
                if (y->hascall) {
                    GEN_NODE(y, &op2);
                    ENSURE_GPR(&op2, y->rtype, 0);

                    GEN_NODE(x, &op1);
                    if (op1.optype >= OpndType_IndirectGPR_ImmOffset)
                        ENSURE_GPR(&op1, x->rtype, 0);
                } else {
                    GEN_NODE(x, &op1);
                    if (op1.optype >= OpndType_IndirectGPR_ImmOffset)
                        ENSURE_GPR(&op1, x->rtype, 0);

                    GEN_NODE(y, &op2);
                    ENSURE_GPR(&op2, y->rtype, 0);
                }

                reg1 = ALLOC_GPR();
                emitpcode(PC_SRAWI, reg1, op2.reg, 31);
                reg2 = ALLOC_GPR();
                emitpcode(PC_XOR, reg2, reg1, op2.reg);
                reg3 = ALLOC_GPR();
                emitpcode(PC_SUBF, reg3, reg1, reg2);
                op2.optype = OpndType_GPR;
                op2.reg = reg3;
                combine(&op1, &op2, outputReg, output);
            } else {
                GEN_NODE(abs_expr, output);
                ENSURE_GPR(output, abs_expr->rtype, 0);

                reg1 = ALLOC_GPR();
                emitpcode(PC_SRAWI, reg1, output->reg, 31);
                reg2 = ALLOC_GPR();
                emitpcode(PC_XOR, reg2, reg1, output->reg);
                reg3 = outputReg ? outputReg : ALLOC_GPR();
                emitpcode(PC_SUBF, reg3, reg1, reg2);
                output->optype = OpndType_GPR;
                output->reg = reg3;
            }
            return;
        }

        if ((has_const = COND_has_const(expr1, expr2))) {
            switch (COND_has_const(expr1, expr2)) {
                case 0:
                case 2:
                    break;
                case 3:
                case 4:
                    if (has_const == 4) {
                        if (expr1->data.intval.lo < expr2->data.intval.lo)
                            gen_negated_condition_gpr(cond, &isel_op1, 0);
                        else
                            gen_condition_gpr(cond, &isel_op1, 0);

                        GEN_NODE(expr1, &op1);
                        GEN_NODE(expr2, &op2);
                        reg1 = ALLOC_GPR();
                        ENSURE_GPR(&op2, expr2->rtype, reg1);
                        emitpcode(PC_ADD, reg1, isel_op1.reg, op2.reg);
                        if (outputReg) {
                            emitpcode(PC_MR, reg2 = outputReg, reg1);
                            reg1 = reg2;
                        }
                        output->optype = OpndType_GPR;
                        output->reg = reg1;
                        return;
                    }
                    break;
                case 5:
                case 6:
                    gen_negated_condition_gpr(cond, &isel_op1, 0);
                    ENSURE_GPR(&isel_op1, TYPE(&stunsignedint), 0);
                    GEN_NODE(expr1, &op1);
                    GEN_NODE(expr2, &op2);

                    reg1 = outputReg ? outputReg : ALLOC_GPR();
                    if (op1.optype == OpndType_Absolute && op1.immediate == 0) {
                        ENSURE_GPR(&op2, expr2->rtype, 0);
                        emitpcode(PC_ANDC, reg1, op2.reg, isel_op1.reg);
                    } else if (op2.optype == OpndType_Absolute && op2.immediate == 0) {
                        ENSURE_GPR(&op1, expr1->rtype, 0);
                        emitpcode(PC_AND, reg1, op1.reg, isel_op1.reg);
                    } else {
                        CError_FATAL(3119);
                    }

                    output->optype = OpndType_GPR;
                    output->reg = reg1;
                    return;
                case 1:
                    reg2 = ALLOC_GPR();
                    reg1 = reg2;
                    logical_expression_nobranch(cond, 0, &isel_op2);

                    GEN_NODE_TO_REG(expr1, reg1, 0, &op1);
                    ENSURE_GPR(&op1, expr1->rtype, reg1);
                    if (op1.reg != reg1)
                        emitpcode(PC_MR, reg1, op1.reg);

                    branch_conditional(isel_op2.reg, isel_op2.regOffset, 1, label2);
                    branch_label(label1);

                    GEN_NODE_TO_REG(expr2, reg1, 0, &op2);
                    ENSURE_GPR(&op2, expr2->rtype, reg1);
                    if (op2.reg != reg1)
                        emitpcode(PC_MR, reg1, op2.reg);

                    branch_label(label2);

                    if (outputReg) {
                        emitpcode(PC_MR, reg2 = outputReg, reg1);
                        reg1 = reg2;
                    }

                    output->optype = OpndType_GPR;
                    output->reg = reg1;
                    return;

                default:
                    CError_FATAL(3168);
            }
        }

        reg1 = ALLOC_GPR();
        logical_expression_nobranch(cond, 0, &isel_op2);

        GEN_NODE_TO_REG(expr2, reg1, 0, &op2);
        ENSURE_GPR(&op2, expr2->rtype, reg1);
        if (op2.reg != reg1)
            emitpcode(PC_MR, reg1, op2.reg);

        branch_conditional(isel_op2.reg, isel_op2.regOffset, 0, label2);
        branch_label(label1);

        GEN_NODE_TO_REG(expr1, reg1, 0, &op1);
        ENSURE_GPR(&op1, expr1->rtype, reg1);
        if (op1.reg != reg1)
            emitpcode(PC_MR, reg1, op1.reg);

        branch_label(label2);

        if (outputReg) {
            emitpcode(PC_MR, reg2 = outputReg, reg1);
            reg1 = reg2;
        }

        output->optype = OpndType_GPR;
        output->reg = reg1;
        return;
    }

    logical_expression(cond, label1, label2, label1);
    branch_label(label1);

    if (IS_TYPE_VOID(type) || expr->ignored) {
        GEN_NODE(expr1, &op1);
        branch_always(label3);
        branch_label(label2);
        GEN_NODE(expr2, &op2);
    } else if (IS_TYPE_FLOAT(type)) {
        if (expr1->hascall || expr2->hascall)
            reg1 = ALLOC_FPR();
        else
            reg1 = outputReg ? outputReg : ALLOC_FPR();

        GEN_NODE_TO_REG(expr1, reg1, 0, &op1);
        ENSURE_FPR(&op1, expr1->rtype, reg1);
        if (op1.reg != reg1)
            emitpcode(PC_FMR, reg1, op1.reg);

        branch_always(label3);
        branch_label(label2);

        GEN_NODE_TO_REG(expr2, reg1, 0, &op2);
        ENSURE_FPR(&op2, expr2->rtype, reg1);
        if (op2.reg != reg1)
            emitpcode(PC_FMR, reg1, op2.reg);

        output->optype = OpndType_FPR;
        output->reg = reg1;
    } else if (TYPE_IS_8BYTES(type)) {
        if (expr1->hascall || expr2->hascall) {
            reg1 = ALLOC_GPR();
            reg3 = ALLOC_GPR();
            reg2 = reg3;
        } else {
            reg1 = outputReg ? outputReg : ALLOC_GPR();
            reg3 = outputRegHi ? outputRegHi : ALLOC_GPR();
            reg2 = reg3;
        }

        GEN_NODE_TO_REG(expr1, reg1, reg2, &op1);
        coerce_to_register_pair(&op1, expr1->rtype, reg1, reg2);

        branch_always(label3);
        branch_label(label2);

        GEN_NODE_TO_REG(expr2, reg1, reg2, &op2);
        coerce_to_register_pair(&op2, expr2->rtype, reg1, reg2);

        output->optype = OpndType_GPRPair;
        output->reg = reg1;
        output->regHi = reg2;
    } else if (TYPE_FITS_IN_REGISTER(type)) {
        if (expr1->hascall || expr2->hascall)
            reg1 = ALLOC_GPR();
        else
            reg1 = outputReg ? outputReg : ALLOC_GPR();

        GEN_NODE_TO_REG(expr1, reg1, 0, &op1);
        ENSURE_GPR(&op1, expr1->rtype, reg1);
        if (op1.reg != reg1)
            emitpcode(PC_MR, reg1, op1.reg);

        branch_always(label3);
        branch_label(label2);

        GEN_NODE_TO_REG(expr2, reg1, 0, &op2);
        ENSURE_GPR(&op2, expr2->rtype, reg1);
        if (op2.reg != reg1)
            emitpcode(PC_MR, reg1, op2.reg);

        output->optype = OpndType_GPR;
        output->reg = reg1;
    } else if (IS_TYPE_VECTOR(type)) {
        if (expr1->hascall || expr2->hascall)
            reg1 = ALLOC_VR();
        else
            reg1 = outputReg ? outputReg : ALLOC_VR();

        GEN_NODE_TO_REG(expr1, reg1, 0, &op1);
        ENSURE_VR(&op1, expr1->rtype, reg1);
        if (op1.reg != reg1)
            emitpcode(PC_VMR, reg1, op1.reg);

        branch_always(label3);
        branch_label(label2);

        GEN_NODE_TO_REG(expr2, reg1, 0, &op2);
        ENSURE_VR(&op2, expr2->rtype, reg1);
        if (op2.reg != reg1)
            emitpcode(PC_VMR, reg1, op2.reg);

        output->optype = OpndType_VR;
        output->reg = reg1;
    } else {
        symbol_operand(output, maketemporary(type));
        indirect(output, NULL);
        coerce_to_addressable(output);

        GEN_NODE(expr1, &op1);

        if (op1.object) {
            if (op1.object->datatype == DLOCAL && (op1.object->u.var.info->flags & VarInfoFlag1))
                align = CMach_ArgumentAlignment(type);
            else
                align = CMach_AllocationAlignment(type, op1.object->qual);
        } else {
            align = CMach_AllocationAlignment(type, 0);
        }

        max_align = CMach_AllocationAlignment(type, 0);
        if (align > max_align)
            align = max_align;

        move_block(output, &op1, type->size, align);

        branch_always(label3);
        branch_label(label2);

        GEN_NODE(expr2, &op2);

        if (op2.object) {
            if (op2.object->datatype == DLOCAL && (op2.object->u.var.info->flags & VarInfoFlag1))
                align = CMach_ArgumentAlignment(type);
            else
                align = CMach_AllocationAlignment(type, op2.object->qual);
        } else {
            align = CMach_AllocationAlignment(type, 0);
        }

        if (align > max_align)
            align = max_align;

        move_block(output, &op2, type->size, align);
    }

    branch_label(label3);
}

static Boolean CONDASS_is_ABS(ENode *cond, ENode *expr1, ENode *expr2) {
    ENode *inner;

    int parity = 0;
    while (ENODE_IS(cond, ELOGNOT)) {
        parity = (parity + 1) & 1;
        cond = cond->data.monadic;
    }

    if (IS_INT_CONST_ZERO(cond->data.diadic.right)) {
        inner = cond->data.diadic.left;
    } else if (IS_INT_CONST_ZERO(cond->data.diadic.left)) {
        inner = cond->data.diadic.left;
        parity = (parity + 1) & 1;
    } else {
        return 0;
    }

    switch (cond->type) {
        case EGREATER:
        case EGREATEREQU:
            if (!parity)
                return 0;
            break;
        case ELESS:
        case ELESSEQU:
            if (parity)
                return 0;
            break;
        default:
            return 0;
    }

    if (!ENODE_IS(expr2, EMONMIN))
        return 0;

    expr2 = expr2->data.monadic;
    if (ENODE_IS(inner, EASS)) {
        inner = inner->data.diadic.left;
        if (!ENODE_IS(expr2, EINDIRECT))
            return 0;
        expr2 = expr2->data.monadic;
        if (!ENODE_IS(expr1, EINDIRECT))
            return 0;
        expr1 = expr1->data.monadic;
    }

    return COND_is_ABS_MatchNodes(inner, expr1, expr2);
}

static int CONDASS_is_OPASS_One(ENode *a, ENode *b, SInt32 *value, ENodeType *nodetype) {
    Type *type;

    type = a->rtype;
    if (!ENODE_IS(a, EINDIRECT))
        return 0;
    a = a->data.monadic;
    if (!ENODE_IS(a, EOBJREF))
        return 0;

    if (ENODE_IS(b, ETYPCON) && b->rtype == type)
        b = b->data.monadic;

    if (b->type != EOR && b->type != EADD && b->type != ESUB)
        return 0;

    *nodetype = b->type;
    if (!IS_INT_CONST(b->data.diadic.right))
        return 0;
    *value = b->data.diadic.right->data.intval.lo;

    if (*value != 1 && *value != -1)
        return 0;

    b = b->data.diadic.left;
    if (ENODE_IS(b, ETYPCON) && TYPE_FITS_IN_REGISTER(b->rtype))
        b = b->data.monadic;

    if (!ENODE_IS(b, EINDIRECT))
        return 0;
    b = b->data.monadic;
    if (!ENODE_IS(b, EOBJREF))
        return 0;

    if (a->data.objref == b->data.objref)
        return 1;
    return 0;
}

void gen_CONDASS(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    ENode *cond;
    ENode *expr1;
    ENode *expr2;
    Type *type;
    PCodeLabel *label1;
    PCodeLabel *label2;
    Operand op1;
    Operand op2;
    Operand op3;
    int reg1;
    int reg2;

    expr1 = expr->data.cond.expr1;
    expr2 = expr->data.cond.expr2;
    type = expr->rtype;

    label1 = makepclabel();
    label2 = makepclabel();

    memclrw(&op1, sizeof(Operand));
    memclrw(&op2, sizeof(Operand));
    memclrw(&op3, sizeof(Operand));

    cond = evaluate_and_skip_comma(expr->data.cond.cond);

    if (TOC_use_fsel(expr)) {
        ENode *left;
        ENode *right;
        ENode *tmp;
        ENodeType nt;
        Boolean flag;
        Boolean flag2;
        Operand op;
        int tmpreg;
        int fneg_reg;
        int fsel_reg;
        int final_reg;

        left = cond->data.diadic.left;
        right = cond->data.diadic.right;
        nt = cond->type;
        flag = 0;
        memclrw(&op, sizeof(Operand));

        CError_ASSERT(3704, ENODE_IS(expr1, EINDIRECT));
        CError_ASSERT(3705, ENODE_IS(expr1->data.monadic, EOBJREF));

        tmpreg = OBJECT_REG(expr1->data.monadic->data.objref);
        final_reg = outputReg ? tmpreg : ALLOC_FPR();

        switch (nt) {
            case EGREATER:
                tmp = left;
                left = right;
                right = tmp;
            case ELESS:
            case ENOTEQU:
                tmp = expr1;
                expr1 = expr2;
                expr2  = tmp;
                flag2 = 1;
                break;
            case ELESSEQU:
                tmp = left;
                left = right;
                right = tmp;
                flag2 = 0;
                break;
            case EGREATEREQU:
            case EEQU:
                flag2 = 0;
                break;
            default:
                CError_FATAL(3744);
        }

        if (ENODE_IS(left, EFLOATCONST) && CMach_FloatIsZero(left->data.floatval)) {
            GEN_NODE(right, &op);
            ENSURE_FPR(&op, right->rtype, 0);
            flag = 1;
        } else if (ENODE_IS(right, EFLOATCONST) && CMach_FloatIsZero(right->data.floatval)) {
            GEN_NODE(left, &op);
            ENSURE_FPR(&op, left->rtype, 0);
        } else {
            fp_binary_operator((type->size == 4) ? PC_FSUBS : PC_FSUB, left, right, 0, &op);
        }

        switch (cond->type) {
            case EEQU:
            case ENOTEQU:
                if (flag) {
                    GEN_NODE(expr1, &op1);
                    op3 = op1;
                    ENSURE_FPR(&op1, expr1->rtype, 0);

                    GEN_NODE_TO_FPR(expr2, &op2, expr2->rtype, 0);

                    fneg_reg = ALLOC_FPR();
                    emitpcode(PC_FNEG, fneg_reg, op.reg);
                    fsel_reg = ALLOC_FPR();
                    emitpcode(PC_FSEL, fsel_reg, op.reg, op2.reg, op1.reg);
                    emitpcode(PC_FSEL, final_reg, fneg_reg, op2.reg, fsel_reg);
                } else {
                    GEN_NODE(expr1, &op1);
                    op3 = op1;
                    ENSURE_FPR(&op1, expr1->rtype, 0);

                    GEN_NODE_TO_FPR(expr2, &op2, expr2->rtype, 0);

                    fneg_reg = ALLOC_FPR();
                    emitpcode(PC_FNEG, fneg_reg, op.reg);
                    fsel_reg = ALLOC_FPR();
                    emitpcode(PC_FSEL, fsel_reg, op.reg, op2.reg, op1.reg);
                    emitpcode(PC_FSEL, final_reg, fneg_reg, op2.reg, fsel_reg);
                }
                break;
            case ELESS:
            case EGREATER:
            case ELESSEQU:
            case EGREATEREQU:
                GEN_NODE(expr1, &op1);
                GEN_NODE(expr2, &op2);
                op3 = flag2 ? op2 : op1;

                ENSURE_FPR(&op1, expr1->rtype, 0);
                ENSURE_FPR(&op2, expr2->rtype, 0);

                fneg_reg = op.reg;
                if (flag) {
                    fneg_reg = ALLOC_FPR();
                    emitpcode(PC_FNEG, fneg_reg, op.reg);
                }

                emitpcode(PC_FSEL, final_reg, fneg_reg, op2.reg, op1.reg);
                break;
            default:
                CError_FATAL(2862);
        }

        if (op3.optype != OpndType_FPR)
            store_fp(final_reg, &op3, type);

        output->optype = OpndType_FPR;
        output->reg = final_reg;
        return;
    }

    if (TOC_use_isel(expr, 1)) {
        Operand isel_op;
        ENode *x;
        ENode *y;
        ENode *abs_expr;

        memclrw(&isel_op, sizeof(Operand));
        CError_ASSERT(3966, ENODE_IS(expr1, EINDIRECT));
        CError_ASSERT(3968, ENODE_IS(expr1->data.monadic, EOBJREF));

        if (CONDASS_is_ABS(cond, expr1, expr2)) {
            if (ENODE_IS(cond->data.diadic.left, EASS))
                GEN_NODE(cond->data.diadic.left, &isel_op);
            else if (ENODE_IS(cond->data.diadic.right, EASS))
                GEN_NODE(cond->data.diadic.right, &isel_op);

            outputReg = OBJECT_REG(expr1->data.monadic->data.objref);
            CError_ASSERT(3979, outputReg);

            GEN_NODE(expr1, &op1);
            op3 = op1;

            CError_ASSERT(3986, op3.optype == OpndType_GPR && op3.reg == outputReg);

            ENSURE_GPR(&op1, expr1->rtype, 0);
            if (expr1->rtype->size < 4)
                extend32(output, expr1->rtype, op3.reg);

            reg1 = ALLOC_GPR();
            reg2 = ALLOC_GPR();
            emitpcode(PC_SRAWI, reg1, op1.reg, 31);
            emitpcode(PC_XOR, reg2, reg1, op1.reg);
            emitpcode(PC_SUBF, outputReg, reg1, reg2);
            output->optype = OpndType_GPR;
            output->reg = op3.reg;

            if (expr1->rtype->size < 4)
                extend32(output, expr1->rtype, op3.reg);

            return;
        }
    }

    logical_expression(cond, label1, label2, label1);
    branch_label(label1);
    gen_ASS(expr, outputReg, outputRegHi, output);
    branch_label(label2);
}

void gen_FUNCCALL(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    if (is_intrinsic_function_call(expr))
        call_intrinsic_function(expr, outputReg, output);
    else
        call_function(expr, output);
}

void gen_OBJREF(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    symbol_operand(output, expr->data.objref);
}

void gen_UNEXPECTED(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    CError_FATAL(4160);
}

static int small(ENode *expr) {
    Type *type;

    type = expr->rtype;
    if (!ENODE_IS(expr, ETYPCON))
        return 0;

    do {
        expr = expr->data.monadic;
    } while (ENODE_IS(expr, ETYPCON) && (type = expr->rtype)->size == 4);

    return IS_TYPE_INT_OR_ENUM(type) && ((type->size < 2) || (type->size == 2 && !is_unsigned(type)));
}

void binary_operator(Opcode opcode, ENode *left, ENode *right, short outputReg, Operand *output) {
    Operand opleft;
    Operand opright;
    int reg;

    memclrw(&opleft, sizeof(Operand));
    memclrw(&opright, sizeof(Operand));

    if (right->hascall) {
        GEN_NODE_TO_GPR(right, &opright, right->rtype, 0);
        GEN_NODE_TO_GPR(left, &opleft, left->rtype, 0);
    } else {
        GEN_NODE_TO_GPR(left, &opleft, left->rtype, 0);
        GEN_NODE_TO_GPR(right, &opright, right->rtype, 0);
    }

    reg = outputReg ? outputReg : ALLOC_GPR();

    if (opcode == PC_MULLW && small(left))
        emitpcode(opcode, reg, opright.reg, opleft.reg);
    else
        emitpcode(opcode, reg, opleft.reg, opright.reg);

    output->optype = OpndType_GPR;
    output->reg = reg;
}

static void binary_immediate(Opcode opcode, ENode *left, SInt32 value, short outputReg, Operand *output) {
    Operand opleft;
    int reg;

    memclrw(&opleft, sizeof(Operand));
    GEN_NODE_TO_GPR(left, &opleft, left->rtype, 0);

    reg = outputReg ? outputReg : ALLOC_GPR();

    if (opcode == PC_MULLI && value == 0)
        emitpcode(PC_LI, reg, 0);
    else if (opcode == PC_MULLI && value == 1)
        emitpcode(PC_MR, reg, opleft.reg);
    else
        emitpcode(opcode, reg, opleft.reg, value);

    output->optype = OpndType_GPR;
    output->reg = reg;
}

void unary_operator(Opcode opcode, ENode *expr, short outputReg, Operand *output) {
    Operand op;
    int reg;

    memclrw(&op, sizeof(Operand));
    GEN_NODE_TO_GPR(expr, &op, expr->rtype, 0);

    reg = outputReg ? outputReg : ALLOC_GPR();
    emitpcode(opcode, reg, op.reg);

    output->optype = OpndType_GPR;
    output->reg = reg;
}

static void or_xor_immediate(Opcode opcode, ENode *expr, SInt32 value, short outputReg, Operand *output) {
    Operand op;
    int reg;

    memclrw(&op, sizeof(Operand));
    GEN_NODE_TO_GPR(expr, &op, expr->rtype, 0);

    reg = outputReg ? outputReg : ALLOC_GPR();

    if (expr->rtype->size > 2 && value != (value & 0xFFFF)) {
        if (value & 0xFFFF) {
            emitpcode((opcode == PC_ORI) ? PC_ORIS : PC_XORIS, reg, op.reg, value >> 16);
            emitpcode(opcode, reg, reg, value & 0xFFFF);
        } else {
            emitpcode((opcode == PC_ORI) ? PC_ORIS : PC_XORIS, reg, op.reg, value >> 16);
        }
    } else {
        emitpcode(opcode, reg, op.reg, value & 0xFFFF);
    }

    output->optype = OpndType_GPR;
    output->reg = reg;
}

static void shift_left_immediate(ENode *expr, short shift, short negate, short outputReg, Operand *output) {
    Operand op;
    int reg;

    memclrw(&op, sizeof(Operand));
    GEN_NODE_TO_GPR(expr, &op, expr->rtype, 0);

    if (negate)
        reg = ALLOC_GPR();
    else
        reg = outputReg ? outputReg : ALLOC_GPR();

    emitpcode(PC_RLWINM, reg, op.reg, shift & 31, 0, 31 - (shift & 31));

    if (negate) {
        int tmp = outputReg ? outputReg : ALLOC_GPR();
        emitpcode(PC_NEG, tmp, reg);
        reg = tmp;
    }

    output->optype = OpndType_GPR;
    output->reg = reg;
}

static void shift_right_immediate(ENode *expr, Type *type, short shift, short outputReg, Operand *output) {
    Operand op;
    int reg;

    memclrw(&op, sizeof(Operand));
    GEN_NODE_TO_GPR(expr, &op, expr->rtype, 0);

    reg = outputReg ? outputReg : ALLOC_GPR();

    if (is_unsigned(type))
        emitpcode(PC_RLWINM, reg, op.reg, (32 - (shift & 31)) & 31, (shift & 31) + (32 - (type->size * 8)), 31);
    else
        emitpcode(PC_SRAWI, reg, op.reg, shift & 31);

    output->optype = OpndType_GPR;
    output->reg = reg;
}

static void signed_divide_by_power_of_2(ENode *expr, int shift, int negate, short outputReg, Operand *output) {
    Operand op;
    int reg;
    int tmpreg1;
    int tmpreg2;

    memclrw(&op, sizeof(Operand));
    GEN_NODE_TO_GPR(expr, &op, expr->rtype, 0);

    if (!copts.optimize_for_size && shift == 1) {
        tmpreg1 = ALLOC_GPR();
        emitpcode(PC_RLWINM, tmpreg1, op.reg, 1, 31, 31);
        tmpreg2 = ALLOC_GPR();
        emitpcode(PC_ADD, tmpreg2, tmpreg1, op.reg);
        reg = (outputReg && !negate) ? outputReg : ALLOC_GPR();
        emitpcode(PC_SRAWI, reg, tmpreg2, 1);
    } else {
        tmpreg1 = ALLOC_GPR();
        emitpcode(PC_SRAWI, tmpreg1, op.reg, shift);
        reg = (outputReg && !negate) ? outputReg : ALLOC_GPR();
        emitpcode(PC_ADDZE, reg, tmpreg1);
    }

    if (negate) {
        int prevreg = reg;
        reg = outputReg ? outputReg : ALLOC_GPR();
        emitpcode(PC_NEG, reg, prevreg);
    }

    output->optype = OpndType_GPR;
    output->reg = reg;
}

static void signed_mod_by_power_of_2(ENode *expr, int shift, int negate, short outputReg, Operand *output) {
    Operand op;
    int reg;
    int tmpreg1;
    int tmpreg2;
    int tmpreg3;
    int tmpreg4;

    memclrw(&op, sizeof(Operand));
    GEN_NODE_TO_GPR(expr, &op, expr->rtype, 0);

    reg = outputReg ? outputReg : ALLOC_GPR();
    tmpreg1 = ALLOC_GPR();
    tmpreg2 = ALLOC_GPR();
    tmpreg3 = ALLOC_GPR();

    if (shift == 1) {
        emitpcode(PC_RLWINM, tmpreg1, op.reg, 1, 31, 31);
        emitpcode(PC_RLWINM, tmpreg2, op.reg, 0, 31, 31);
        emitpcode(PC_XOR, tmpreg3, tmpreg2, tmpreg1);
        emitpcode(PC_SUBF, reg, tmpreg1, tmpreg3);
    } else {
        tmpreg4 = ALLOC_GPR();
        emitpcode(PC_RLWINM, tmpreg1, op.reg, 32 - shift, 0, 31 - (32 - shift));
        emitpcode(PC_RLWINM, tmpreg2, op.reg, 1, 31, 31);
        emitpcode(PC_SUBF, tmpreg3, tmpreg2, tmpreg1);
        emitpcode(PC_RLWINM, tmpreg4, tmpreg3, shift, 0, 31);
        emitpcode(PC_ADD, reg, tmpreg4, tmpreg2);
    }

    output->optype = OpndType_GPR;
    output->reg = reg;
}

static void fp_binary_operator(Opcode opcode, ENode *left, ENode *right, short outputReg, Operand *output) {
    Operand opleft;
    Operand opright;
    int reg;

    memclrw(&opleft, sizeof(Operand));
    memclrw(&opright, sizeof(Operand));

    if (right->hascall) {
        GEN_NODE_TO_FPR(right, &opright, right->rtype, 0);
        GEN_NODE_TO_FPR(left, &opleft, left->rtype, 0);
    } else {
        GEN_NODE_TO_FPR(left, &opleft, left->rtype, 0);
        GEN_NODE_TO_FPR(right, &opright, right->rtype, 0);
    }

    reg = outputReg ? outputReg : ALLOC_FPR();
    emitpcode(opcode, reg, opleft.reg, opright.reg);

    output->optype = OpndType_FPR;
    output->reg = reg;
}

void fp_unary_operator(Opcode opcode, ENode *expr, short outputReg, Operand *output) {
    Operand op;
    int reg;

    memclrw(&op, sizeof(Operand));
    GEN_NODE_TO_FPR(expr, &op, expr->rtype, 0);

    reg = outputReg ? outputReg : ALLOC_FPR();
    emitpcode(opcode, reg, op.reg);

    output->optype = OpndType_FPR;
    output->reg = reg;
}

void fp_multiply_add(Opcode opcode, ENode *a, ENode *b, ENode *c, short outputReg, Operand *output) {
    Operand opA;
    Operand opB;
    Operand opC;
    int reg;

    memclrw(&opA, sizeof(Operand));
    memclrw(&opB, sizeof(Operand));
    memclrw(&opC, sizeof(Operand));

    if (c->hascall) {
        GEN_NODE_TO_FPR(c, &opC, c->rtype, 0);
        if (b->hascall) {
            GEN_NODE_TO_FPR(b, &opB, b->rtype, 0);
            GEN_NODE_TO_FPR(a, &opA, a->rtype, 0);
        } else {
            GEN_NODE_TO_FPR(a, &opA, a->rtype, 0);
            GEN_NODE_TO_FPR(b, &opB, b->rtype, 0);
        }
    } else {
        if (b->hascall) {
            GEN_NODE_TO_FPR(b, &opB, b->rtype, 0);
            GEN_NODE_TO_FPR(a, &opA, a->rtype, 0);
            GEN_NODE_TO_FPR(c, &opC, c->rtype, 0);
        } else {
            GEN_NODE_TO_FPR(a, &opA, a->rtype, 0);
            GEN_NODE_TO_FPR(b, &opB, b->rtype, 0);
            GEN_NODE_TO_FPR(c, &opC, c->rtype, 0);
        }
    }

    reg = outputReg ? outputReg : ALLOC_FPR();
    emitpcode(opcode, reg, opA.reg, opB.reg, opC.reg);

    output->optype = OpndType_FPR;
    output->reg = reg;
}

void gen_COMPARE(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    expr = evaluate_and_skip_comma(expr);
    if (TYPE_IS_8BYTES(expr->data.diadic.right->rtype) || TYPE_IS_8BYTES(expr->data.diadic.left->rtype))
        I8_gen_condition(expr, output, 1);
    else
        gen_condition_gpr(expr, output, outputReg);
}

void gen_LOGICAL(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    ENode *inner;
    ENodeType op;

    expr = evaluate_and_skip_comma(expr);
    inner = evaluate_and_skip_comma(expr->data.monadic);
    expr->data.monadic = inner;

    if (ENODE_IS(expr, ELOGNOT) && !ENODE_IS2(inner, ELAND, ELOR)) {
        op = inner->type;
        if (ENODE_IS(inner, ELOGNOT)) {
            switch (inner->data.monadic->type) {
                case ELOGNOT:
                case ELESS:
                case EGREATER:
                case ELESSEQU:
                case EGREATEREQU:
                case EEQU:
                case ENOTEQU:
                case ELAND:
                case ELOR:
                    GEN_NODE(inner->data.monadic, output);
                    if (expr->data.monadic->rtype->size < 4)
                        extend32(output, expr->data.monadic->rtype, 0);
                    ENSURE_GPR(output, expr->data.monadic->rtype, 0);
                    return;
            }
        }

        if (ENODE_IS(inner, ENOTEQU) && !TYPE_IS_8BYTES(inner->data.diadic.left->rtype) && ENODE_IS(inner->data.diadic.right, EINTCONST) && inner->data.diadic.right->data.intval.lo == 0) {
            int tmpreg1;
            int tmpreg2;
            GEN_NODE(inner->data.diadic.left, output);
            if (inner->data.diadic.left->rtype->size < 4)
                extend32(output, inner->data.diadic.left->rtype, 0);
            ENSURE_GPR(output, inner->data.diadic.left->rtype, 0);

            tmpreg1 = ALLOC_GPR();
            tmpreg2 = ALLOC_GPR();
            CError_ASSERT(4853, output->optype == OpndType_GPR);

            emitpcode(PC_CNTLZW, tmpreg2, output->reg);
            emitpcode(PC_RLWINM, tmpreg1, tmpreg2, 27, 5, 31);
            output->optype = OpndType_GPR;
            output->reg = tmpreg1;
        } else {
            int tmpreg1;
            int tmpreg2;
            ENodeType inverted;

            inverted = invert_relop(op);
            if (op != inverted && !IS_TYPE_FLOAT(inner->data.diadic.left->rtype)) {
                inner->type = inverted;
                gen_COMPARE(inner, 0, 0, output);
                inner->type = inverted;
                return;
            }

            GEN_NODE(inner, output);
            if (inner->rtype->size < 4)
                extend32(output, inner->rtype, 0);
            ENSURE_GPR(output, inner->rtype, 0);

            tmpreg1 = ALLOC_GPR();
            tmpreg2 = ALLOC_GPR();
            CError_ASSERT(4883, output->optype == OpndType_GPR);

            emitpcode(PC_CNTLZW, tmpreg2, output->reg);
            emitpcode(PC_RLWINM, tmpreg1, tmpreg2, 27, 5, 31);
            output->optype = OpndType_GPR;
            output->reg = tmpreg1;
        }
    } else {
        PCodeLabel *label1;
        PCodeLabel *label2;
        int tmpreg;

        label1 = makepclabel();
        label2 = makepclabel();

        tmpreg = ALLOC_GPR();
        emitpcode(PC_LI, tmpreg, 0);
        logical_expression(expr, label1, label2, label1);
        branch_label(label1);
        emitpcode(PC_LI, tmpreg, 1);
        branch_label(label2);
        output->optype = OpndType_GPR;
        output->reg = tmpreg;
    }
}

void gen_NULLCHECK(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    ENode *left;
    ENode *right;
    Operand opleft;
    Operand opright;
    PrecomputedOperand *precomp;
    int flag;
    int reg;
    PCodeLabel *label;

    left = expr->data.nullcheck.nullcheckexpr;
    right = expr->data.nullcheck.condexpr;
    memclrw(&opleft, sizeof(Operand));
    memclrw(&opright, sizeof(Operand));
    flag = !IS_TYPE_VOID(expr->rtype) && !expr->ignored;

    GEN_NODE(left, &opleft);
    if (left->rtype->size < 4)
        extend32(&opleft, left->rtype, 0);
    ENSURE_GPR(&opleft, left->rtype, 0);

    precomp = lalloc(sizeof(PrecomputedOperand));
    precomp->precompid = expr->data.nullcheck.precompid;
    precomp->operand = opleft;
    precomp->next = precomputedoperands;
    precomputedoperands = precomp;

    emitpcode(PC_CMPI, 0, opleft.reg, 0);
    if (flag) {
        emitpcode(PC_MR, reg = ALLOC_GPR(), opleft.reg);
    }

    label = makepclabel();
    branch_conditional(0, EEQU, 1, label);
    GEN_NODE(right, &opright);
    precomputedoperands = precomputedoperands->next;

    if (flag) {
        ENSURE_GPR(&opright, right->rtype, reg);
        if (opright.reg != reg)
            emitpcode(PC_MR, reg, opright.reg);
        output->optype = OpndType_GPR;
        output->reg = reg;
    }

    branch_label(label);
}

void gen_PRECOMP(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    PrecomputedOperand *precomp;

    for (precomp = precomputedoperands; precomp; precomp = precomp->next) {
        if (precomp->precompid == expr->data.precompid)
            break;
    }

    *output = precomp->operand;
}

void logical_expression(ENode *cond, PCodeLabel *if_true, PCodeLabel *if_false, PCodeLabel *end) {
    PCodeLabel *label;
    Operand op;
    memclrw(&op, sizeof(Operand));

    cond = evaluate_and_skip_comma(cond);
    switch (cond->type) {
        case ELAND:
            label = makepclabel();
            logical_expression(cond->data.diadic.left, label, if_false, label);
            branch_label(label);
            logical_expression(cond->data.diadic.right, if_true, if_false, end);
            break;
        case ELOR:
            label = makepclabel();
            logical_expression(cond->data.diadic.left, if_true, label, label);
            branch_label(label);
            logical_expression(cond->data.diadic.right, if_true, if_false, end);
            break;
        case ELOGNOT:
            logical_expression(cond->data.monadic, if_false, if_true, end);
            break;
        case ELESS:
        case EGREATER:
        case ELESSEQU:
        case EGREATEREQU:
        case EEQU:
        case ENOTEQU:
            if (TYPE_IS_8BYTES(cond->data.diadic.right->rtype) || TYPE_IS_8BYTES(cond->data.diadic.left->rtype))
                I8_gen_condition(cond, &op, 0);
            else
                gen_condition(cond, &op);

            if (end == if_true)
                branch_conditional(op.reg, op.regOffset, 0, if_false);
            else
                branch_conditional(op.reg, op.regOffset, 1, if_true);
            break;
        default:
            CError_FATAL(5160);
    }
}

static void logical_expression_nobranch(ENode *cond, Boolean invert, Operand *output) {
    cond = evaluate_and_skip_comma(cond);
    switch (cond->type) {
        case ELOGNOT:
            logical_expression_nobranch(cond->data.monadic, 1, output);
            break;
        case ELESS:
        case EGREATER:
        case ELESSEQU:
        case EGREATEREQU:
        case EEQU:
        case ENOTEQU:
            if (invert) {
                ENodeType nt = invert_relop(cond->type);
                CError_ASSERT(5190, nt != cond->type);
                cond->type = nt;
            }

            if (TYPE_IS_8BYTES(cond->data.diadic.right->rtype) || TYPE_IS_8BYTES(cond->data.diadic.left->rtype))
                I8_gen_condition(cond, output, 0);
            else
                gen_condition(cond, output);

            break;
        default:
            CError_FATAL(5206);
    }
}

static ENodeType invert_relop(ENodeType nt) {
    switch (nt) {
        case ELESS: return EGREATEREQU;
        case EGREATER: return ELESSEQU;
        case ELESSEQU: return EGREATER;
        case EGREATEREQU: return ELESS;
        case EEQU: return ENOTEQU;
        case ENOTEQU: return EEQU;
        default: return nt;
    }
}

static int reverse_relop(int nt) {
    switch (nt) {
        case ELESS: return EGREATER;
        case EGREATER: return ELESS;
        case ELESSEQU: return EGREATEREQU;
        case EGREATEREQU: return ELESSEQU;
        default: return nt;
    }
}

void gen_condition(ENode *cond, Operand *output) {
    ENode *left;
    ENode *right;

    left = cond->data.diadic.left;
    right = cond->data.diadic.right;
    if (IS_TYPE_FLOAT(left->rtype)) {
        compare_floating(cond->type, left, right, output);
        return;
    }

    if (ENODE_IS(right, EINTCONST)) {
        if (is_unsigned(left->rtype)) {
            UInt32 val = right->data.intval.lo;
            if (FITS_IN_USHORT(val)) {
                compare_immediate(cond->type, left, val, output);
                return;
            } else if (ENODE_IS2(cond, EEQU, ENOTEQU)) {
                compare_immediate_long(cond->type, left, val, output);
                return;
            }
        } else {
            UInt32 val = right->data.intval.lo;
            if (FITS_IN_SHORT(val)) {
                compare_immediate(cond->type, left, val, output);
                return;
            } else if (ENODE_IS2(cond, EEQU, ENOTEQU)) {
                compare_immediate_long(cond->type, left, val, output);
                return;
            }
        }
    } else if (ENODE_IS(left, EINTCONST)) {
        if (is_unsigned(right->rtype)) {
            UInt32 val = left->data.intval.lo;
            if (FITS_IN_USHORT(val)) {
                compare_immediate(reverse_relop(cond->type), right, val, output);
                return;
            } else if (ENODE_IS2(cond, EEQU, ENOTEQU)) {
                compare_immediate_long(reverse_relop(cond->type), right, val, output);
                return;
            }
        } else {
            UInt32 val = left->data.intval.lo;
            if (FITS_IN_SHORT(val)) {
                compare_immediate(reverse_relop(cond->type), right, val, output);
                return;
            } else if (ENODE_IS2(cond, EEQU, ENOTEQU)) {
                compare_immediate_long(reverse_relop(cond->type), right, val, output);
                return;
            }
        }
    }

    compare_integer(cond->type, left, right, output);
}

void gen_condition_gpr(ENode *cond, Operand *output, short outputReg) {
    ENode *left;
    ENode *right;
    Operand condOp;
    int finalReg;
    int tmpReg;
    int tmpReg2;
    int tmpReg3;
    int tmpReg4;
    int a;
    int b;

    left = cond->data.diadic.left;
    right = cond->data.diadic.right;
    memclrw(&condOp, sizeof(Operand));

    if (!IS_TYPE_FLOAT(left->rtype)) {
        Operand op1;
        Operand op2;
        Operand opTmp;
        memclrw(&op1, sizeof(Operand));
        memclrw(&op2, sizeof(Operand));
        memclrw(&opTmp, sizeof(Operand));

        if (right->hascall) {
            GEN_NODE(right, &op2);
            if (!IS_INT_CONST_ZERO(right)) {
                if (right->rtype->size < 4)
                    extend32(&op2, right->rtype, 0);
                ENSURE_GPR(&op2, right->rtype, 0);
            }

            GEN_NODE(left, &op1);
            if (left->rtype->size < 4)
                extend32(&op1, left->rtype, 0);
            ENSURE_GPR(&op1, left->rtype, 0);
        } else {
            GEN_NODE(left, &op1);
            ENSURE_GPR(&op1, left->rtype, 0);
            if (left->rtype->size < 4)
                extend32(&op1, left->rtype, 0);

            GEN_NODE(right, &op2);
            if (!IS_INT_CONST_ZERO(right)) {
                if (right->rtype->size < 4)
                    extend32(&op2, right->rtype, 0);
                ENSURE_GPR(&op2, right->rtype, 0);
            }
        }

        switch (cond->type) {
            case EEQU:
                if (
                    copts.peephole &&
                    IS_INT_CONST(right) &&
                    pclastblock->pcodeCount > 0 &&
                    pclastblock->lastPCode->op == PC_RLWINM &&
                    pclastblock->lastPCode->args[0].data.reg.reg == op1.reg
                    )
                {
                    PCode *pc = pclastblock->lastPCode;
                    SInt32 a = pc->args[2].data.imm.value;
                    SInt32 b = pc->args[3].data.imm.value;
                    SInt32 value = right->data.intval.lo;
                    if (b == pc->args[4].data.imm.value) {
                        finalReg = outputReg ? outputReg : ALLOC_GPR();

                        if (value != (value & 1)) {
                            emitpcode(PC_LI, finalReg, 0);
                        } else if (value == 0) {
                            tmpReg = ALLOC_GPR();
                            emitpcode(
                                    PC_RLWINM, tmpReg,
                                    pc->args[1].data.reg.reg,
                                    (a + b + 1) & 31, 31, 31);
                            emitpcode(PC_XORI, finalReg, tmpReg, 1);
                        } else if (value == 1) {
                            emitpcode(
                                    PC_RLWINM, finalReg,
                                    pc->args[1].data.reg.reg,
                                    (a + b + 1) & 31, 31, 31);
                        } else {
                            CError_FATAL(5434);
                        }
                        output->optype = OpndType_GPR;
                        output->reg = finalReg;
                        return;
                    }
                }

                if (IS_INT_CONST_ZERO(right)) {
                    tmpReg = ALLOC_GPR();
                    emitpcode(PC_CNTLZW, tmpReg, op1.reg, 0);
                    finalReg = outputReg ? outputReg : ALLOC_GPR();
                    emitpcode(PC_RLWINM, finalReg, tmpReg, 27, 5, 31);
                    output->optype = OpndType_GPR;
                    output->reg = finalReg;
                    return;
                } else {
                    tmpReg = ALLOC_GPR();
                    emitpcode(PC_SUBF, tmpReg, op1.reg, op2.reg);
                    tmpReg2 = ALLOC_GPR();
                    emitpcode(PC_CNTLZW, tmpReg2, tmpReg);
                    finalReg = outputReg ? outputReg : ALLOC_GPR();
                    emitpcode(PC_RLWINM, finalReg, tmpReg2, 27, 5, 31);
                    output->optype = OpndType_GPR;
                    output->reg = finalReg;
                    return;
                }

            case ENOTEQU:
                if (
                    copts.peephole &&
                    IS_INT_CONST(right) &&
                    pclastblock->pcodeCount > 0 &&
                    pclastblock->lastPCode->op == PC_RLWINM &&
                    pclastblock->lastPCode->args[0].data.reg.reg == op1.reg
                    )
                {
                    PCode *pc = pclastblock->lastPCode;
                    SInt32 a = pc->args[2].data.imm.value;
                    SInt32 b = pc->args[3].data.imm.value;
                    SInt32 value = right->data.intval.lo;
                    if (b == pc->args[4].data.imm.value) {
                        finalReg = outputReg ? outputReg : ALLOC_GPR();

                        if (value != (value & 1)) {
                            emitpcode(PC_LI, finalReg, 1);
                        } else if (value == 0) {
                            emitpcode(
                                    PC_RLWINM, finalReg,
                                    pc->args[1].data.reg.reg,
                                    (a + b + 1) & 31, 31, 31);
                        } else if (value == 1) {
                            tmpReg = ALLOC_GPR();
                            emitpcode(
                                    PC_RLWINM, tmpReg,
                                    pc->args[1].data.reg.reg,
                                    (a + b + 1) & 31, 31, 31);
                            emitpcode(PC_XORI, finalReg, tmpReg, 1);
                        } else {
                            CError_FATAL(5503);
                        }
                        output->optype = OpndType_GPR;
                        output->reg = finalReg;
                        return;
                    }
                }

                if (IS_INT_CONST_ZERO(right)) {
                    if (copts.optimize_for_size) {
                        tmpReg = ALLOC_GPR();
                        emitpcode(PC_ADDIC, tmpReg, op1.reg, -1);
                        finalReg = outputReg ? outputReg : ALLOC_GPR();
                        emitpcode(PC_SUBFE, finalReg, tmpReg, op1.reg);
                    } else {
                        tmpReg = ALLOC_GPR();
                        emitpcode(PC_NEG, tmpReg, op1.reg);
                        tmpReg2 = ALLOC_GPR();
                        emitpcode(PC_OR, tmpReg2, tmpReg, op1.reg);
                        finalReg = outputReg ? outputReg : ALLOC_GPR();
                        emitpcode(PC_RLWINM, finalReg, tmpReg2, 1, 31, 31);
                    }
                    output->optype = OpndType_GPR;
                    output->reg = finalReg;
                    return;
                }

                if (copts.optimize_for_size) {
                    tmpReg = ALLOC_GPR();
                    emitpcode(PC_SUBF, tmpReg, op1.reg, op2.reg);
                    tmpReg2 = ALLOC_GPR();
                    emitpcode(PC_ADDIC, tmpReg2, tmpReg, -1);
                    finalReg = outputReg ? outputReg : ALLOC_GPR();
                    emitpcode(PC_SUBFE, finalReg, tmpReg2, tmpReg);
                } else {
                    tmpReg = ALLOC_GPR();
                    emitpcode(PC_SUBF, tmpReg, op1.reg, op2.reg);
                    tmpReg2 = ALLOC_GPR();
                    emitpcode(PC_SUBF, tmpReg2, op2.reg, op1.reg);
                    tmpReg3 = ALLOC_GPR();
                    emitpcode(PC_OR, tmpReg3, tmpReg, tmpReg2);
                    finalReg = outputReg ? outputReg : ALLOC_GPR();
                    emitpcode(PC_RLWINM, finalReg, tmpReg3, 1, 31, 31);
                }
                output->optype = OpndType_GPR;
                output->reg = finalReg;
                return;

            case EGREATEREQU:
                if (!is_unsigned(left->rtype) && IS_INT_CONST_ZERO(right)) {
                    tmpReg = ALLOC_GPR();
                    emitpcode(PC_RLWINM, tmpReg, op1.reg, 1, 31, 31);
                    finalReg = outputReg ? outputReg : ALLOC_GPR();
                    emitpcode(PC_XORI, finalReg, tmpReg, 1);
                    output->optype = OpndType_GPR;
                    output->reg = finalReg;
                    return;
                }
                opTmp = op2;
                op2 = op1;
                op1 = opTmp;

            case ELESSEQU:
                if (is_unsigned(left->rtype)) {
                    if (copts.optimize_for_size) {
                        tmpReg = ALLOC_GPR();
                        emitpcode(PC_LI, tmpReg, -1);
                        tmpReg2 = ALLOC_GPR();
                        emitpcode(PC_SUBFC, tmpReg2, op1.reg, op2.reg);
                        finalReg = outputReg ? outputReg : ALLOC_GPR();
                        emitpcode(PC_SUBFZE, finalReg, tmpReg);
                    } else {
                        tmpReg = ALLOC_GPR();
                        emitpcode(PC_SUBF, tmpReg, op1.reg, op2.reg);
                        tmpReg2 = ALLOC_GPR();
                        emitpcode(PC_ORC, tmpReg2, op2.reg, op1.reg);
                        tmpReg3 = ALLOC_GPR();
                        emitpcode(PC_RLWINM, tmpReg3, tmpReg, 31, 1, 31);
                        tmpReg4 = ALLOC_GPR();
                        emitpcode(PC_SUBF, tmpReg4, tmpReg3, tmpReg2);
                        finalReg = outputReg ? outputReg : ALLOC_GPR();
                        emitpcode(PC_RLWINM, finalReg, tmpReg4, 1, 31, 31);
                    }
                    output->optype = OpndType_GPR;
                    output->reg = finalReg;
                    return;
                }

                if (IS_INT_CONST_ZERO(right)) {
                    tmpReg = ALLOC_GPR();
                    emitpcode(PC_LI, tmpReg, 1);
                    tmpReg2 = ALLOC_GPR();
                    emitpcode(PC_CNTLZW, tmpReg2, op1.reg);
                    finalReg = outputReg ? outputReg : ALLOC_GPR();
                    emitpcode(PC_RLWNM, finalReg, tmpReg, tmpReg2, 31, 31);
                    output->optype = OpndType_GPR;
                    output->reg = finalReg;
                    return;
                }

                tmpReg2 = ALLOC_GPR();
                emitpcode(PC_SRAWI, tmpReg2, op2.reg, 31);
                tmpReg = ALLOC_GPR();
                emitpcode(PC_RLWINM, tmpReg, op1.reg, 1, 31, 31);
                tmpReg3 = ALLOC_GPR();
                emitpcode(PC_SUBFC, tmpReg3, op1.reg, op2.reg);
                finalReg = outputReg ? outputReg : ALLOC_GPR();
                emitpcode(PC_ADDE, finalReg, tmpReg2, tmpReg);
                output->optype = OpndType_GPR;
                output->reg = finalReg;
                return;

            case EGREATER:
                if (!is_unsigned(left->rtype) && IS_INT_CONST_ZERO(right)) {
                    tmpReg = ALLOC_GPR();
                    emitpcode(PC_NEG, tmpReg, op1.reg);
                    tmpReg2 = ALLOC_GPR();
                    emitpcode(PC_ANDC, tmpReg2, tmpReg, op1.reg);
                    finalReg = outputReg ? outputReg : ALLOC_GPR();
                    emitpcode(PC_RLWINM, finalReg, tmpReg2, 1, 31, 31);
                    output->optype = OpndType_GPR;
                    output->reg = finalReg;
                    return;
                }

                opTmp = op2;
                op2 = op1;
                op1 = opTmp;

            case ELESS:
                if (is_unsigned(left->rtype)) {
                    if (left->rtype->size <= 2) {
                        tmpReg = ALLOC_GPR();
                        emitpcode(PC_SUBF, tmpReg, op2.reg, op1.reg);
                        finalReg = outputReg ? outputReg : ALLOC_GPR();
                        emitpcode(PC_RLWINM, finalReg, tmpReg, 1, 31, 31);
                        output->optype = OpndType_GPR;
                        output->reg = finalReg;
                    } else {
                        if (copts.optimize_for_size) {
                            tmpReg = ALLOC_GPR();
                            emitpcode(PC_SUBFC, tmpReg, op2.reg, op1.reg);
                            tmpReg2 = ALLOC_GPR();
                            emitpcode(PC_SUBFE, tmpReg2, tmpReg, tmpReg);
                            finalReg = outputReg ? outputReg : ALLOC_GPR();
                            emitpcode(PC_NEG, finalReg, tmpReg2);
                        } else {
                            tmpReg = ALLOC_GPR();
                            emitpcode(PC_XOR, tmpReg, op2.reg, op1.reg);
                            tmpReg2 = ALLOC_GPR();
                            emitpcode(PC_CNTLZW, tmpReg2, tmpReg);
                            tmpReg3 = ALLOC_GPR();
                            emitpcode(PC_SLW, tmpReg3, op2.reg, tmpReg2);
                            finalReg = outputReg ? outputReg : ALLOC_GPR();
                            emitpcode(PC_RLWINM, finalReg, tmpReg3, 1, 31, 31);
                        }
                        output->optype = OpndType_GPR;
                        output->reg = finalReg;
                        return;
                    }
                    return;
                }

                if (IS_INT_CONST_ZERO(right)) {
                    finalReg = outputReg ? outputReg : ALLOC_GPR();
                    emitpcode(PC_RLWINM, finalReg, op1.reg, 1, 31, 31);
                    output->optype = OpndType_GPR;
                    output->reg = finalReg;
                    return;
                }

                tmpReg = ALLOC_GPR();
                emitpcode(PC_XOR, tmpReg, op2.reg, op1.reg);
                tmpReg2 = ALLOC_GPR();
                emitpcode(PC_SRAWI, tmpReg2, tmpReg, 1);
                tmpReg3 = ALLOC_GPR();
                emitpcode(PC_AND, tmpReg3, tmpReg, op2.reg);
                tmpReg4 = ALLOC_GPR();
                emitpcode(PC_SUBF, tmpReg4, tmpReg3, tmpReg2);

                finalReg = outputReg ? outputReg : ALLOC_GPR();
                emitpcode(PC_RLWINM, finalReg, tmpReg4, 1, 31, 31);
                output->optype = OpndType_GPR;
                output->reg = finalReg;
                return;

            default:
                CError_FATAL(5777);
        }
    }

    gen_condition(cond, &condOp);
    emitpcode(PC_MFCR, tmpReg = used_virtual_registers[RegClass_GPR]++);
    a = 0;
    b = condOp.reg * 4;
    switch (condOp.regOffset) {
        case ENOTEQU:
            a = 1;
        case EEQU:
            b += 2;
            break;
        case EGREATEREQU:
            a = 1;
            break;
        case ELESSEQU:
            a = 1;
        case EGREATER:
            b += 1;
            break;
    }

    finalReg = outputReg ? outputReg : ALLOC_GPR();
    if (a) {
        emitpcode(PC_RLWINM, tmpReg, tmpReg, b + 1, 31, 31);
        emitpcode(PC_XORI, finalReg, tmpReg, 1);
    } else {
        emitpcode(PC_RLWINM, finalReg, tmpReg, b + 1, 31, 31);
    }
    output->optype = OpndType_GPR;
    output->reg = finalReg;
}

void gen_negated_condition_gpr(ENode *cond, Operand *output, short outputReg) {
    ENode *left;
    ENode *right;
    Operand op1;
    Operand op2;
    Operand opTmp;
    int finalReg;
    int tmpReg;
    int tmpReg2;
    int tmpReg3;

    left = cond->data.diadic.left;
    right = cond->data.diadic.right;
    CError_ASSERT(5843, TYPE_FITS_IN_REGISTER(left->rtype) && TYPE_FITS_IN_REGISTER(right->rtype));

    memclrw(&op1, sizeof(Operand));
    memclrw(&op2, sizeof(Operand));
    memclrw(&opTmp, sizeof(Operand));

    if (right->hascall) {
        GEN_NODE(right, &op2);
        if (!IS_INT_CONST_ZERO(right)) {
            if (right->rtype->size < 4)
                extend32(&op2, right->rtype, 0);
            ENSURE_GPR(&op2, right->rtype, 0);
        }

        GEN_NODE(left, &op1);
        if (left->rtype->size < 4)
            extend32(&op1, left->rtype, 0);
        ENSURE_GPR(&op1, left->rtype, 0);
    } else {
        GEN_NODE(left, &op1);
        ENSURE_GPR(&op1, left->rtype, 0);
        if (left->rtype->size < 4)
            extend32(&op1, left->rtype, 0);

        GEN_NODE(right, &op2);
        if (!IS_INT_CONST_ZERO(right)) {
            if (right->rtype->size < 4)
                extend32(&op2, right->rtype, 0);
            ENSURE_GPR(&op2, right->rtype, 0);
        }
    }

    switch (cond->type) {
        case EEQU:
            if (
                copts.peephole &&
                IS_INT_CONST(right) &&
                pclastblock->pcodeCount > 0 &&
                pclastblock->lastPCode->op == PC_RLWINM &&
                pclastblock->lastPCode->args[0].data.reg.reg == op1.reg
                )
            {
                PCode *pc = pclastblock->lastPCode;
                SInt32 a = pc->args[2].data.imm.value;
                SInt32 b = pc->args[3].data.imm.value;
                SInt32 value = right->data.intval.lo;
                if (b == pc->args[4].data.imm.value) {
                    finalReg = outputReg ? outputReg : ALLOC_GPR();

                    if (value != (value & 1)) {
                        emitpcode(PC_LI, finalReg, 0);
                        output->optype = OpndType_GPR;
                        output->reg = finalReg;
                        return;
                    }

                    if (value == 0) {
                        tmpReg = ALLOC_GPR();
                        emitpcode(
                            PC_RLWINM, tmpReg,
                            pc->args[1].data.reg.reg,
                            (a + b + 1) & 31, 31, 31);
                        emitpcode(PC_ADDI, finalReg, tmpReg, 0, -1);
                        output->optype = OpndType_GPR;
                        output->reg = finalReg;
                        return;
                    }

                    if (value == 1) {
                        tmpReg = ALLOC_GPR();
                        emitpcode(
                            PC_RLWINM,
                            tmpReg,
                            pc->args[1].data.reg.reg,
                            (a + b + 1) & 31,
                            31,
                            31);
                        emitpcode(PC_NEG, finalReg, tmpReg);
                        output->optype = OpndType_GPR;
                        output->reg = tmpReg; // bug???
                        return;
                    }

                    CError_FATAL(5923);
                }
            }

            if (IS_INT_CONST_ZERO(right)) {
                if (copts.optimize_for_size) {
                    tmpReg = ALLOC_GPR();
                    emitpcode(PC_ADDIC, tmpReg, op1.reg, -1);
                    finalReg = outputReg ? outputReg : ALLOC_GPR();
                    emitpcode(PC_SUBFE, finalReg, tmpReg, tmpReg);
                } else {
                    tmpReg = ALLOC_GPR();
                    emitpcode(PC_CNTLZW, tmpReg, op1.reg);
                    tmpReg2 = ALLOC_GPR();
                    emitpcode(PC_RLWINM, tmpReg2, tmpReg, 27, 31, 31);
                    finalReg = outputReg ? outputReg : ALLOC_GPR();
                    emitpcode(PC_NEG, finalReg, tmpReg2);
                }
                output->optype = OpndType_GPR;
                output->reg = finalReg;
                return;
            }

            if (copts.optimize_for_size) {
                tmpReg = ALLOC_GPR();
                emitpcode(PC_SUBF, tmpReg, op2.reg, op1.reg);
                tmpReg2 = ALLOC_GPR();
                emitpcode(PC_ADDIC, tmpReg2, tmpReg, -1);
                finalReg = outputReg ? outputReg : ALLOC_GPR();
                emitpcode(PC_SUBFE, finalReg, tmpReg2, tmpReg2);
            } else {
                tmpReg = ALLOC_GPR();
                emitpcode(PC_SUBF, tmpReg, op2.reg, op1.reg);
                tmpReg2 = ALLOC_GPR();
                emitpcode(PC_SUBF, tmpReg2, op1.reg, op2.reg);
                tmpReg3 = ALLOC_GPR();
                emitpcode(PC_NOR, tmpReg3, tmpReg, tmpReg2);
                finalReg = outputReg ? outputReg : ALLOC_GPR();
                emitpcode(PC_SRAWI, finalReg, tmpReg3, 31);
            }
            output->optype = OpndType_GPR;
            output->reg = finalReg;
            return;

        case ENOTEQU:
            if (
                copts.peephole &&
                IS_INT_CONST(right) &&
                pclastblock->pcodeCount > 0 &&
                pclastblock->lastPCode->op == PC_RLWINM &&
                pclastblock->lastPCode->args[0].data.reg.reg == op1.reg
                )
            {
                PCode *pc = pclastblock->lastPCode;
                SInt32 a = pc->args[2].data.imm.value;
                SInt32 b = pc->args[3].data.imm.value;
                SInt32 value = right->data.intval.lo;
                if (b == pc->args[4].data.imm.value) {
                    finalReg = outputReg ? outputReg : ALLOC_GPR();

                    if (value != (value & 1)) {
                        emitpcode(PC_LI, finalReg, -1);
                        output->optype = OpndType_GPR;
                        output->reg = finalReg;
                        return;
                    }

                    if (value == 0) {
                        tmpReg = ALLOC_GPR();
                        emitpcode(
                            PC_RLWINM, tmpReg,
                            pc->args[1].data.reg.reg,
                            (a + b + 1) & 31, 31, 31);
                        emitpcode(PC_NEG, finalReg, tmpReg);
                        output->optype = OpndType_GPR;
                        output->reg = finalReg;
                        return;
                    }

                    if (value == 1) {
                        tmpReg = ALLOC_GPR();
                        emitpcode(
                            PC_RLWINM, tmpReg,
                            pc->args[1].data.reg.reg,
                            (a + b + 1) & 31, 31, 31);
                        emitpcode(PC_ADDI, finalReg, tmpReg, 0, -1);
                        output->optype = OpndType_GPR;
                        output->reg = finalReg;
                        return;
                    }

                    CError_FATAL(6031);
                }
            }

            if (IS_INT_CONST_ZERO(right)) {
                if (copts.optimize_for_size) {
                    tmpReg = ALLOC_GPR();
                    emitpcode(PC_SUBFIC, tmpReg, op1.reg, 0);
                    finalReg = outputReg ? outputReg : ALLOC_GPR();
                    emitpcode(PC_SUBFE, finalReg, tmpReg, tmpReg);
                } else {
                    tmpReg = ALLOC_GPR();
                    emitpcode(PC_NEG, tmpReg, op1.reg);
                    tmpReg2 = ALLOC_GPR();
                    emitpcode(PC_OR, tmpReg2, tmpReg, op1.reg);
                    finalReg = outputReg ? outputReg : ALLOC_GPR();
                    emitpcode(PC_SRAWI, finalReg, tmpReg2, 31);
                }
                output->optype = OpndType_GPR;
                output->reg = finalReg;
                return;
            }

            if (copts.optimize_for_size) {
                tmpReg = ALLOC_GPR();
                emitpcode(PC_SUBF, tmpReg, op2.reg, op1.reg);
                tmpReg2 = ALLOC_GPR();
                emitpcode(PC_SUBFIC, tmpReg2, tmpReg, 0);
                finalReg = outputReg ? outputReg : ALLOC_GPR();
                emitpcode(PC_SUBFE, finalReg, tmpReg2, tmpReg2);
            } else {
                tmpReg = ALLOC_GPR();
                emitpcode(PC_SUBF, tmpReg, op2.reg, op1.reg);
                tmpReg2 = ALLOC_GPR();
                emitpcode(PC_SUBF, tmpReg2, op1.reg, op2.reg);
                tmpReg3 = ALLOC_GPR();
                emitpcode(PC_OR, tmpReg3, tmpReg, tmpReg2);
                finalReg = outputReg ? outputReg : ALLOC_GPR();
                emitpcode(PC_SRAWI, finalReg, tmpReg3, 31);
            }
            output->optype = OpndType_GPR;
            output->reg = finalReg;
            return;

        case EGREATEREQU:
            if (!is_unsigned(left->rtype) && IS_INT_CONST_ZERO(right)) {
                tmpReg = ALLOC_GPR();
                emitpcode(PC_RLWINM, tmpReg, op1.reg, 1, 31, 31);
                finalReg = outputReg ? outputReg : ALLOC_GPR();
                emitpcode(PC_ADDI, finalReg, tmpReg, 0, -1);
                output->optype = OpndType_GPR;
                output->reg = finalReg;
                return;
            }
            opTmp = op2;
            op2 = op1;
            op1 = opTmp;

        case ELESSEQU:
            if (is_unsigned(left->rtype)) {
                tmpReg = ALLOC_GPR();
                emitpcode(PC_SUBFC, tmpReg, op1.reg, op2.reg);
                tmpReg2 = ALLOC_GPR();
                emitpcode(PC_ADDZE, tmpReg2, op1.reg);
                finalReg = outputReg ? outputReg : ALLOC_GPR();
                emitpcode(PC_SUBF, finalReg, tmpReg2, op1.reg);
                output->optype = OpndType_GPR;
                output->reg = finalReg;
                return;
            }

            if (IS_INT_CONST_ZERO(right)) {
                tmpReg = ALLOC_GPR();
                emitpcode(PC_NEG, tmpReg, op1.reg);
                tmpReg2 = ALLOC_GPR();
                emitpcode(PC_ORC, tmpReg2, op1.reg, tmpReg);
                finalReg = outputReg ? outputReg : ALLOC_GPR();
                emitpcode(PC_SRAWI, finalReg, tmpReg2, 31);
                output->optype = OpndType_GPR;
                output->reg = finalReg;
                return;
            }

            tmpReg = ALLOC_GPR();
            emitpcode(PC_XORIS, tmpReg, op1.reg, 0x8000);
            tmpReg2 = ALLOC_GPR();
            emitpcode(PC_SUBF, tmpReg2, op1.reg, op2.reg);
            tmpReg3 = ALLOC_GPR();
            emitpcode(PC_ADDC, tmpReg3, tmpReg2, tmpReg);
            finalReg = outputReg ? outputReg : ALLOC_GPR();
            emitpcode(PC_SUBFE, finalReg, tmpReg3, tmpReg3);
            output->optype = OpndType_GPR;
            output->reg = finalReg;
            return;

        case EGREATER:
            if (!is_unsigned(left->rtype) && IS_INT_CONST_ZERO(right)) {
                tmpReg = ALLOC_GPR();
                emitpcode(PC_NEG, tmpReg, op1.reg);
                tmpReg2 = ALLOC_GPR();
                emitpcode(PC_ANDC, tmpReg2, tmpReg, op1.reg);
                finalReg = outputReg ? outputReg : ALLOC_GPR();
                emitpcode(PC_SRAWI, finalReg, tmpReg2, 31);
                output->optype = OpndType_GPR;
                output->reg = finalReg;
                return;
            }
            opTmp = op2;
            op2 = op1;
            op1 = opTmp;

        case ELESS:
            if (is_unsigned(left->rtype)) {
                tmpReg = ALLOC_GPR();
                emitpcode(PC_SUBFC, tmpReg, op2.reg, op1.reg);
                finalReg = outputReg ? outputReg : ALLOC_GPR();
                emitpcode(PC_SUBFE, finalReg, tmpReg, tmpReg);
                output->optype = OpndType_GPR;
                output->reg = finalReg;
                return;
            }

            if (IS_INT_CONST_ZERO(right)) {
                finalReg = outputReg ? outputReg : ALLOC_GPR();
                emitpcode(PC_SRAWI, finalReg, op1.reg, 31);
                output->optype = OpndType_GPR;
                output->reg = finalReg;
                return;
            }

            tmpReg = ALLOC_GPR();
            emitpcode(PC_SUBFC, tmpReg, op2.reg, op1.reg);
            tmpReg2 = ALLOC_GPR();
            emitpcode(PC_RLWINM, tmpReg2, op2.reg, 1, 31, 31);
            tmpReg3 = ALLOC_GPR();
            emitpcode(PC_RLWINM, tmpReg3, op1.reg, 1, 31, 31);
            finalReg = outputReg ? outputReg : ALLOC_GPR();
            emitpcode(PC_SUBFE, finalReg, tmpReg3, tmpReg2);
            output->optype = OpndType_GPR;
            output->reg = finalReg;
            return;

        default:
            CError_FATAL(6240);
    }
}

void compare_floating(short nt, ENode *left, ENode *right, Operand *output) {
    Operand opleft;
    Operand opright;

    memclrw(&opleft, sizeof(Operand));
    memclrw(&opright, sizeof(Operand));

    if (right->hascall) {
        GEN_NODE_TO_FPR(right, &opright, right->rtype, 0);
        GEN_NODE_TO_FPR(left, &opleft, left->rtype, 0);
    } else {
        GEN_NODE_TO_FPR(left, &opleft, left->rtype, 0);
        GEN_NODE_TO_FPR(right, &opright, right->rtype, 0);
    }

    emitpcode((nt == EEQU || nt == ENOTEQU) ? PC_FCMPU : PC_FCMPO, 0, opleft.reg, opright.reg);
    if (nt == ELESSEQU) {
        emitpcode(PC_CROR, 0, 2, 0, 0, 0, 2);
        nt = EEQU;
    } else if (nt == EGREATEREQU) {
        emitpcode(PC_CROR, 0, 2, 0, 1, 0, 2);
        nt = EEQU;
    }

    output->optype = OpndType_CRField;
    output->reg = 0;
    output->regOffset = nt;
}

void compare_integer(short nt, ENode *left, ENode *right, Operand *output) {
    Operand opleft;
    Operand opright;

    memclrw(&opleft, sizeof(Operand));
    memclrw(&opright, sizeof(Operand));

    if (right->hascall) {
        GEN_NODE(right, &opright);
        if (right->rtype->size < 4)
            extend32(&opright, right->rtype, 0);
        ENSURE_GPR(&opright, right->rtype, 0);

        GEN_NODE(left, &opleft);
        if (left->rtype->size < 4)
            extend32(&opleft, left->rtype, 0);
        ENSURE_GPR(&opleft, left->rtype, 0);
    } else {
        GEN_NODE(left, &opleft);
        ENSURE_GPR(&opleft, left->rtype, 0);
        if (left->rtype->size < 4)
            extend32(&opleft, left->rtype, 0);

        GEN_NODE(right, &opright);
        if (right->rtype->size < 4)
            extend32(&opright, right->rtype, 0);
        ENSURE_GPR(&opright, right->rtype, 0);
    }

    emitpcode(is_unsigned(left->rtype) ? PC_CMPL : PC_CMP, 0, opleft.reg, opright.reg);

    output->optype = OpndType_CRField;
    output->reg = 0;
    output->regOffset = nt;
}

void compare_immediate(short nt, ENode *left, SInt32 value, Operand *output) {
    int postIncFlag;
    short postIncReg;
    Operand op;
    SInt32 postIncValue;

    memclrw(&op, sizeof(Operand));

    postIncFlag = ispostincrementopportunity(left, &op, &postIncValue);
    if (!postIncFlag) {
        GEN_NODE(left, &op);
        if (op.optype != OpndType_CRField) {
            if (left->rtype->size < 4)
                extend32(&op, left->rtype, 0);
            else
                ENSURE_GPR(&op, left->rtype, 0);
        }
    } else {
        postIncReg = op.reg;
        if (left->rtype->size < 4)
            extend32(&op, left->rtype, 0);
        ENSURE_GPR(&op, left->rtype, 0);
    }

    if (op.optype == OpndType_CRField) {
        if (
            (nt == EEQU && value == 1) ||
            (nt == ENOTEQU && value == 0) ||
            (nt == EGREATER && value == 0) ||
            (nt == EGREATEREQU && value == 1)
            )
        {
            *output = op;
            return;
        }

        if (
            (nt == EEQU && value == 0) ||
            (nt == ENOTEQU && value == 1) ||
            (nt == ELESS && value == 1) ||
            (nt == ELESSEQU && value == 0)
            )
        {
            *output = op;
            switch (op.regOffset) {
                case EEQU:
                    output->regOffset = ENOTEQU;
                    return;
                case ENOTEQU:
                    output->regOffset = EEQU;
                    return;
                case ELESS:
                    output->regOffset = EGREATEREQU;
                    return;
                case EGREATER:
                    output->regOffset = ELESSEQU;
                    return;
                case ELESSEQU:
                    output->regOffset = EGREATER;
                    return;
                case EGREATEREQU:
                    output->regOffset = ELESS;
                    return;
            }
        }

        ENSURE_GPR(&op, left->rtype, 0);
    }

    if (
        copts.peephole &&
        value == 0 &&
        pclastblock->pcodeCount > 0 &&
        pclastblock->lastPCode->op != PC_RLWINM &&
        (PCODE_FLAG_SET_F(pclastblock->lastPCode) & (fIsMove | fSideEffects | fCanSetRecordBit | fOpTypeGPR)) == (fCanSetRecordBit | fOpTypeGPR) &&
        pclastblock->lastPCode->args[0].data.reg.reg == op.reg &&
        (!is_unsigned(left->rtype) || nt == EEQU || nt == ENOTEQU)
        )
    {
        pcsetrecordbit(pclastblock->lastPCode);
    } else {
        emitpcode(is_unsigned(left->rtype) ? PC_CMPLI : PC_CMPI, 0, op.reg, value);
    }

    if (postIncFlag)
        add_register_immediate(postIncReg, postIncReg, postIncValue);

    output->optype = OpndType_CRField;
    output->reg = 0;
    output->regOffset = nt;
}

void compare_immediate_long(short nt, ENode *left, SInt32 value, Operand *output) {
    int postIncFlag;
    short postIncReg;
    int outputReg;
    Operand op;
    SInt32 postIncValue;

    memclrw(&op, sizeof(Operand));

    postIncFlag = ispostincrementopportunity(left, &op, &postIncValue);
    if (!postIncFlag) {
        GEN_NODE(left, &op);
    } else {
        postIncReg = op.reg;
    }

    if (left->rtype->size < 4)
        extend32(&op, left->rtype, 0);
    ENSURE_GPR(&op, left->rtype, 0);

    outputReg = ALLOC_GPR();
    emitpcode(PC_ADDIS, outputReg, op.reg, 0, (SInt16) (~(value >> 16) + 1));
    emitpcode(PC_CMPLI, 0, outputReg, value & 0xFFFF);

    if (postIncFlag)
        add_register_immediate(postIncReg, postIncReg, postIncValue);

    output->optype = OpndType_CRField;
    output->reg = 0;
    output->regOffset = nt;
}

static int ismask(SInt32 value, short *first, short *last) {
    int start, end, bit;
    start = end = -1;
    for (bit = 31; bit >= 0; bit--) {
        if (value & 1) {
            if (start != -1)
                return 0;
            if (end == -1)
                end = bit;
        } else {
            if (end != -1 && start == -1)
                start = bit + 1;
        }
        value >>= 1;
    }

    if (end == -1)
        return 0;
    if (start == -1)
        start = 0;
    *first = start;
    *last = end;
    return 1;
}

int ismaskconstant(SInt32 value, short *first, short *last) {
    short my_first;
    short my_last;
    if (ismask(value, first, last))
        return 1;

    if (value && ismask(~value, &my_first, &my_last)) {
        *first = my_last + 1;
        *last = my_first - 1;
        return 1;
    } else {
        return 0;
    }
}

static void shift_and_mask(ENode *expr, short a, short b, short c, short outputReg, Operand *output) {
    Operand op;
    int reg;

    memclrw(&op, sizeof(Operand));
    GEN_NODE(expr, &op);
    ENSURE_GPR(&op, expr->rtype, 0);

    reg = outputReg ? outputReg : ALLOC_GPR();
    emitpcode(PC_RLWINM, reg, op.reg, a, b, c);

    output->optype = OpndType_GPR;
    output->reg = reg;
}

int ispostincrementopportunity(ENode *expr, Operand *op, SInt32 *value) {
    Type *type;
    int reg;

    type = expr->rtype;
    if (!ENODE_IS2(expr, EPOSTINC, EPOSTDEC))
        return 0;
    if (!ENODE_IS(expr->data.monadic, EINDIRECT))
        return 0;
    if (!ENODE_IS(expr->data.monadic->data.monadic, EOBJREF))
        return 0;

    reg = OBJECT_REG(expr->data.monadic->data.monadic->data.objref);
    if (!reg)
        return 0;

    if (IS_TYPE_POINTER(type)) {
        if (ENODE_IS(expr, EPOSTINC))
            *value = TPTR_TARGET(type)->size;
        else
            *value = -TPTR_TARGET(type)->size;
    } else {
        if (ENODE_IS(expr, EPOSTINC))
            *value = 1;
        else
            *value = -1;
    }

    op->optype = OpndType_GPR;
    op->reg = reg;
    return 1;
}

void add_register_immediate(short regA, short regB, SInt32 value) {
    if (!FITS_IN_SHORT(value)) {
        emitpcode(PC_ADDIS, regA, regB, 0, HIGH_PART(value));
        if (LOW_PART(value))
            emitpcode(PC_ADDI, regA, regA, 0, LOW_PART(value));
    } else {
        emitpcode(PC_ADDI, regA, regB, 0, value);
    }
}

static int ispowerof2(SInt32 val) {
    int bit = getbit(val);
    return (bit > 0 && bit < 31) ? bit : 0;
}

void I8_gen_ADD(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    int is_uns;
    ENode *left;
    ENode *right;
    short reg;
    short regHi;
    short tmpreg1;
    short tmpreg2;
    SInt32 skipleft;
    SInt32 skipright;
    Operand opleft;
    Operand opright;

    left = expr->data.diadic.left;
    right = expr->data.diadic.right;
    memclrw(&opleft, sizeof(Operand));
    memclrw(&opright, sizeof(Operand));

    if (right->hascall) {
        GEN_NODE(right, &opright);
        if (TYPE_IS_8BYTES(right->rtype))
            coerce_to_register_pair(&opright, right->rtype, 0, 0);
        else
            ENSURE_GPR(&opright, right->rtype, 0);

        GEN_NODE(left, &opleft);
        if (TYPE_IS_8BYTES(left->rtype))
            coerce_to_register_pair(&opleft, left->rtype, 0, 0);
        else
            ENSURE_GPR(&opleft, left->rtype, 0);
    } else {
        GEN_NODE(left, &opleft);
        if (TYPE_IS_8BYTES(left->rtype))
            coerce_to_register_pair(&opleft, left->rtype, 0, 0);
        else
            ENSURE_GPR(&opleft, left->rtype, 0);

        GEN_NODE(right, &opright);
        if (TYPE_IS_8BYTES(right->rtype))
            coerce_to_register_pair(&opright, right->rtype, 0, 0);
        else
            ENSURE_GPR(&opright, right->rtype, 0);
    }

    reg = ALLOC_GPR();
    regHi = ALLOC_GPR();
    is_uns = is_unsigned(expr->rtype) != 0;
    skipleft = GetSizeSkip(left);
    skipright = GetSizeSkip(right);

    if (skipleft < skipright) {
        Operand tmpop;
        SInt32 tmp;

        expr->data.diadic.left = right;
        expr->data.diadic.right = left;
        left = expr->data.diadic.left;
        right = expr->data.diadic.right;

        tmpop = opright;
        opright = opleft;
        opleft = tmpop;

        tmp = skipleft;
        skipleft = skipright;
        skipright = tmp;
    }

    switch (skipleft + skipright) {
        case 1 + 1:
        case 1 + 2:
        case 2 + 2:
            if (ENODE_IS(left, EINTCONST) && FITS_IN_SHORT2(left->data.intval.lo)) {
                emitpcode(PC_ADDIC, reg, opright.reg, LOW_PART(left->data.intval.lo));
            } else if (ENODE_IS(right, EINTCONST) && FITS_IN_SHORT2(right->data.intval.lo)) {
                emitpcode(PC_ADDIC, reg, opleft.reg, LOW_PART(right->data.intval.lo));
            } else {
                emitpcode(PC_ADDC, reg, opleft.reg, opright.reg);
            }
            if (is_uns)
                emitpcode(PC_LI, regHi, 0);
            else
                emitpcode(PC_SRAWI, regHi, reg, 31);
            break;
        case 1 + 4:
        case 2 + 4:
        case 4 + 4:
            if (!is_uns) {
                tmpreg1 = ALLOC_GPR();
                tmpreg2 = ALLOC_GPR();
                emitpcode(PC_SRAWI, tmpreg2, opleft.reg, 31);
                emitpcode(PC_SRAWI, tmpreg1, opright.reg, 31);
            }
            if (ENODE_IS(left, EINTCONST) && FITS_IN_SHORT2(left->data.intval.lo)) {
                emitpcode(PC_ADDIC, reg, opright.reg, LOW_PART(left->data.intval.lo));
            } else if (ENODE_IS(right, EINTCONST) && FITS_IN_SHORT2(right->data.intval.lo)) {
                emitpcode(PC_ADDIC, reg, opleft.reg, LOW_PART(right->data.intval.lo));
            } else {
                emitpcode(PC_ADDC, reg, opleft.reg, opright.reg);
            }
            if (is_uns) {
                tmpreg1 = ALLOC_GPR();
                emitpcode(PC_LI, tmpreg1, 0);
                emitpcode(PC_ADDZE, regHi, tmpreg1);
            } else {
                emitpcode(PC_ADDE, regHi, tmpreg1, tmpreg2);
            }
            break;
        case 1 + 8:
        case 2 + 8:
        case 4 + 8:
            CError_ASSERT(6933, skipleft == 8);
            if (!is_uns) {
                tmpreg2 = ALLOC_GPR();
                emitpcode(PC_SRAWI, tmpreg2, opright.reg, 31);
            }
            if (ENODE_IS(left, EINTCONST) && FITS_IN_SHORT2(left->data.intval.lo) && left->data.intval.hi == 0) {
                emitpcode(PC_ADDIC, reg, opright.reg, LOW_PART(left->data.intval.lo));
            } else if (ENODE_IS(right, EINTCONST) && FITS_IN_SHORT2(right->data.intval.lo) && right->data.intval.hi == 0) {
                emitpcode(PC_ADDIC, reg, opleft.reg, LOW_PART(right->data.intval.lo));
            } else {
                emitpcode(PC_ADDC, reg, opleft.reg, opright.reg);
            }
            if (is_uns)
                emitpcode(PC_ADDZE, regHi, opleft.regHi);
            else
                emitpcode(PC_ADDE, regHi, opleft.regHi, tmpreg2);
            break;
        case 8 + 8:
            emitpcode(PC_ADDC, reg, opleft.reg, opright.reg);
            emitpcode(PC_ADDE, regHi, opleft.regHi, opright.regHi);
            break;
        default:
            CError_FATAL(6979);
    }

    output->optype = OpndType_GPRPair;
    output->reg = reg;
    output->regHi = regHi;
}

void I8_gen_INTCONST(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    short reg;
    short regHi;

    reg = outputReg ? outputReg : ALLOC_GPR();
    regHi = outputRegHi ? outputRegHi : ALLOC_GPR();

    load_immediate(reg, expr->data.intval.lo);
    load_immediate(regHi, expr->data.intval.hi);

    output->optype = OpndType_GPRPair;
    output->reg = reg;
    output->regHi = regHi;
}

void I8_gen_SUB(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    int is_uns;
    ENode *left;
    ENode *right;
    short reg;
    short regHi;
    short tmpreg1;
    short tmpreg2;
    short tmpreg3;
    SInt32 skipleft;
    SInt32 skipright;
    Operand opleft;
    Operand opright;

    left = expr->data.diadic.left;
    right = expr->data.diadic.right;
    memclrw(&opleft, sizeof(Operand));
    memclrw(&opright, sizeof(Operand));

    if (right->hascall) {
        GEN_NODE(right, &opright);
        if (TYPE_IS_8BYTES(right->rtype))
            coerce_to_register_pair(&opright, right->rtype, 0, 0);
        else
            ENSURE_GPR(&opright, right->rtype, 0);

        GEN_NODE(left, &opleft);
        if (TYPE_IS_8BYTES(left->rtype))
            coerce_to_register_pair(&opleft, left->rtype, 0, 0);
        else
            ENSURE_GPR(&opleft, left->rtype, 0);
    } else {
        GEN_NODE(left, &opleft);
        if (TYPE_IS_8BYTES(left->rtype))
            coerce_to_register_pair(&opleft, left->rtype, 0, 0);
        else
            ENSURE_GPR(&opleft, left->rtype, 0);

        GEN_NODE(right, &opright);
        if (TYPE_IS_8BYTES(right->rtype))
            coerce_to_register_pair(&opright, right->rtype, 0, 0);
        else
            ENSURE_GPR(&opright, right->rtype, 0);
    }

    reg = ALLOC_GPR();
    regHi = ALLOC_GPR();
    is_uns = is_unsigned(expr->rtype) != 0;
    skipleft = GetSizeSkip(left);
    skipright = GetSizeSkip(right);

    switch (skipleft + skipright) {
        case 1 + 1:
        case 1 + 2:
        case 2 + 2:
            if (ENODE_IS(left, EINTCONST) && FITS_IN_SHORT2(left->data.intval.lo)) {
                emitpcode(PC_SUBFIC, reg, opright.reg, LOW_PART(left->data.intval.lo));
            } else {
                emitpcode(PC_SUBFC, reg, opright.reg, opleft.reg);
            }
            if (is_uns)
                emitpcode(PC_LI, regHi, 0);
            else
                emitpcode(PC_SRAWI, regHi, reg, 31);
            break;
        case 1 + 4:
        case 2 + 4:
        case 4 + 4:
            if (!is_uns) {
                tmpreg1 = ALLOC_GPR();
                tmpreg2 = ALLOC_GPR();
                emitpcode(PC_SRAWI, tmpreg2, opleft.reg, 31);
                emitpcode(PC_SRAWI, tmpreg1, opright.reg, 31);
            }
            if (ENODE_IS(left, EINTCONST) && FITS_IN_SHORT2(left->data.intval.lo)) {
                emitpcode(PC_SUBFIC, reg, opright.reg, LOW_PART(left->data.intval.lo));
            } else {
                emitpcode(PC_SUBFC, reg, opright.reg, opleft.reg);
            }
            if (is_uns) {
                tmpreg1 = ALLOC_GPR();
                emitpcode(PC_LI, tmpreg1, 0);
                emitpcode(PC_SUBFZE, regHi, tmpreg1);
            } else {
                emitpcode(PC_SUBFE, regHi, tmpreg1, tmpreg2);
            }
            break;
        case 1 + 8:
        case 2 + 8:
        case 4 + 8:
            if (skipleft < skipright) {
                emitpcode(PC_SUBFC, reg, opright.reg, opleft.reg);
                emitpcode(PC_SUBFE, regHi, opright.regHi, opleft.regHi);
            } else {
                if (ENODE_IS(left, EINTCONST) && FITS_IN_SHORT2(left->data.intval.lo) && left->data.intval.hi == 0) {
                    emitpcode(PC_SUBFIC, reg, opright.reg, LOW_PART(left->data.intval.lo));
                } else {
                    emitpcode(PC_SUBFC, reg, opright.reg, opleft.reg);
                }
                tmpreg1 = ALLOC_GPR();
                emitpcode(PC_LI, tmpreg1, 0);
                emitpcode(PC_SUBFE, regHi, tmpreg1, opleft.regHi);
            }
            break;
        case 8 + 8:
            emitpcode(PC_SUBFC, reg, opright.reg, opleft.reg);
            emitpcode(PC_SUBFE, regHi, opright.regHi, opleft.regHi);
            break;
        default:
            CError_FATAL(7211);
    }

    output->optype = OpndType_GPRPair;
    output->reg = reg;
    output->regHi = regHi;
}

void I8_gen_XOR(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    ENode *left;
    ENode *right;
    short reg;
    short regHi;
    Operand opleft;
    Operand opright;

    left = expr->data.diadic.left;
    right = expr->data.diadic.right;
    memclrw(&opleft, sizeof(Operand));
    memclrw(&opright, sizeof(Operand));

    if (right->hascall) {
        GEN_NODE(right, &opright);
        coerce_to_register_pair(&opright, right->rtype, 0, 0);

        GEN_NODE(left, &opleft);
        coerce_to_register_pair(&opleft, left->rtype, 0, 0);
    } else {
        GEN_NODE(left, &opleft);
        coerce_to_register_pair(&opleft, left->rtype, 0, 0);

        GEN_NODE(right, &opright);
        coerce_to_register_pair(&opright, right->rtype, 0, 0);
    }

    CError_ASSERT(7254, opleft.optype == OpndType_GPRPair && opright.optype == OpndType_GPRPair);

    reg = outputReg ? outputReg : ALLOC_GPR();
    regHi = outputRegHi ? outputRegHi : ALLOC_GPR();

    emitpcode(PC_XOR, reg, opleft.reg, opright.reg);
    emitpcode(PC_XOR, regHi, opleft.regHi, opright.regHi);

    output->optype = OpndType_GPRPair;
    output->reg = reg;
    output->regHi = regHi;
}

void I8_gen_OR(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    ENode *left;
    ENode *right;
    short reg;
    short regHi;
    Operand opleft;
    Operand opright;

    left = expr->data.diadic.left;
    right = expr->data.diadic.right;
    memclrw(&opleft, sizeof(Operand));
    memclrw(&opright, sizeof(Operand));

    if (right->hascall) {
        GEN_NODE(right, &opright);
        coerce_to_register_pair(&opright, right->rtype, 0, 0);

        GEN_NODE(left, &opleft);
        coerce_to_register_pair(&opleft, left->rtype, 0, 0);
    } else {
        GEN_NODE(left, &opleft);
        coerce_to_register_pair(&opleft, left->rtype, 0, 0);

        GEN_NODE(right, &opright);
        coerce_to_register_pair(&opright, right->rtype, 0, 0);
    }

    CError_ASSERT(7304, opleft.optype == OpndType_GPRPair && opright.optype == OpndType_GPRPair);

    reg = outputReg ? outputReg : ALLOC_GPR();
    regHi = outputRegHi ? outputRegHi : ALLOC_GPR();

    emitpcode(PC_OR, reg, opleft.reg, opright.reg);
    emitpcode(PC_OR, regHi, opleft.regHi, opright.regHi);

    output->optype = OpndType_GPRPair;
    output->reg = reg;
    output->regHi = regHi;
}

void I8_gen_AND(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    ENode *left;
    ENode *right;
    short reg;
    short regHi;
    Operand opleft;
    Operand opright;

    left = expr->data.diadic.left;
    right = expr->data.diadic.right;
    memclrw(&opleft, sizeof(Operand));
    memclrw(&opright, sizeof(Operand));

    if (right->hascall) {
        GEN_NODE(right, &opright);
        coerce_to_register_pair(&opright, right->rtype, 0, 0);

        GEN_NODE(left, &opleft);
        coerce_to_register_pair(&opleft, left->rtype, 0, 0);
    } else {
        GEN_NODE(left, &opleft);
        coerce_to_register_pair(&opleft, left->rtype, 0, 0);

        GEN_NODE(right, &opright);
        coerce_to_register_pair(&opright, right->rtype, 0, 0);
    }

    CError_ASSERT(7354, opleft.optype == OpndType_GPRPair && opright.optype == OpndType_GPRPair);

    reg = outputReg ? outputReg : ALLOC_GPR();
    regHi = outputRegHi ? outputRegHi : ALLOC_GPR();

    emitpcode(PC_AND, reg, opleft.reg, opright.reg);
    emitpcode(PC_AND, regHi, opleft.regHi, opright.regHi);

    output->optype = OpndType_GPRPair;
    output->reg = reg;
    output->regHi = regHi;
}

int I8_getbit(UInt64 val) {
    switch (val) {
        case 0: return -1;
        case 1ULL << 0: return 0;
        case 1ULL << 1: return 1;
        case 1ULL << 2: return 2;
        case 1ULL << 3: return 3;
        case 1ULL << 4: return 4;
        case 1ULL << 5: return 5;
        case 1ULL << 6: return 6;
        case 1ULL << 7: return 7;
        case 1ULL << 8: return 8;
        case 1ULL << 9: return 9;
        case 1ULL << 10: return 10;
        case 1ULL << 11: return 11;
        case 1ULL << 12: return 12;
        case 1ULL << 13: return 13;
        case 1ULL << 14: return 14;
        case 1ULL << 15: return 15;
        case 1ULL << 16: return 16;
        case 1ULL << 17: return 17;
        case 1ULL << 18: return 18;
        case 1ULL << 19: return 19;
        case 1ULL << 20: return 20;
        case 1ULL << 21: return 21;
        case 1ULL << 22: return 22;
        case 1ULL << 23: return 23;
        case 1ULL << 24: return 24;
        case 1ULL << 25: return 25;
        case 1ULL << 26: return 26;
        case 1ULL << 27: return 27;
        case 1ULL << 28: return 28;
        case 1ULL << 29: return 29;
        case 1ULL << 30: return 30;
        case 1ULL << 31: return 31;
        case 1ULL << 32: return 32;
        case 1ULL << 33: return 33;
        case 1ULL << 34: return 34;
        case 1ULL << 35: return 35;
        case 1ULL << 36: return 36;
        case 1ULL << 37: return 37;
        case 1ULL << 38: return 38;
        case 1ULL << 39: return 39;
        case 1ULL << 40: return 40;
        case 1ULL << 41: return 41;
        case 1ULL << 42: return 42;
        case 1ULL << 43: return 43;
        case 1ULL << 44: return 44;
        case 1ULL << 45: return 45;
        case 1ULL << 46: return 46;
        case 1ULL << 47: return 47;
        case 1ULL << 48: return 48;
        case 1ULL << 49: return 49;
        case 1ULL << 50: return 50;
        case 1ULL << 51: return 51;
        case 1ULL << 52: return 52;
        case 1ULL << 53: return 53;
        case 1ULL << 54: return 54;
        case 1ULL << 55: return 55;
        case 1ULL << 56: return 56;
        case 1ULL << 57: return 57;
        case 1ULL << 58: return 58;
        case 1ULL << 59: return 59;
        case 1ULL << 60: return 60;
        case 1ULL << 61: return 61;
        case 1ULL << 62: return 62;
        case 1ULL << 63: return 63;
        default: return -2;
    }
}

int I8_log2n(UInt64 val) {
    int bit = I8_getbit(val);
    return (bit > 0 && bit < 63) ? bit : 0;
}

void I8_ShiftLeftImmediate(Operand opnd, SInt32 value, int is_unsigned, SInt32 size, short reg, short regHi) {
    if (opnd.reg == reg || opnd.regHi == regHi || opnd.reg == regHi || opnd.regHi == reg)
        CError_FATAL(7703);

    if (value < 32) {
        emitpcode(PC_RLWINM, reg, opnd.reg, value, 0, 31 - value);
        if (size > 4) {
            emitpcode(PC_RLWINM, regHi, opnd.regHi, value, 0, 31 - value);
            emitpcode(PC_RLWIMI, regHi, opnd.reg, value, 32 - value, 31);
        } else {
            emitpcode(PC_RLWINM, regHi, opnd.reg, value, 32 - value, 31);
        }
    } else if (value <= 63) {
        if (value == 32)
            emitpcode(PC_MR, regHi, opnd.reg);
        else
            emitpcode(PC_RLWINM, regHi, opnd.reg, value - 32, 0, 63 - value);
        emitpcode(PC_LI, reg, 0);
    } else {
        CError_FATAL(7732);
    }
}

void I8_ShiftRightImmediate(Operand opnd, SInt32 value, int is_unsigned, short reg, short regHi, int unk) {
    short tmpreg1;
    short tmpreg2;
    short tmpreg3;
    short tmpreg4;

    if (opnd.reg == reg || opnd.regHi == regHi || opnd.reg == regHi || opnd.regHi == reg)
        CError_FATAL(7756);

    if (value < 32) {
        emitpcode(PC_RLWINM, reg, opnd.reg, 32 - value, 0, 31);
        emitpcode(PC_RLWIMI, reg, opnd.regHi, 32 - value, 0, value - 1);
        if (is_unsigned) {
            emitpcode(PC_RLWINM, regHi, opnd.regHi, 32 - value, value, 31);
        } else if (unk) {
            tmpreg1 = ALLOC_GPR();
            emitpcode(PC_MR, tmpreg1, opnd.regHi);
            emitpcode(PC_RLWIMI, tmpreg1, opnd.reg, 0, 31 - (value - 1), 31);
            emitpcode(PC_SRAWI, regHi, tmpreg1, value);
        } else {
            emitpcode(PC_SRAWI, regHi, opnd.regHi, value);
        }
    } else if (value == 32) {
        if (is_unsigned) {
            emitpcode(PC_MR, reg, opnd.regHi);
            emitpcode(PC_LI, regHi, 0);
        } else if (unk) {
            tmpreg1 = ALLOC_GPR();
            tmpreg2 = ALLOC_GPR();
            tmpreg3 = ALLOC_GPR();
            emitpcode(PC_NEG, tmpreg1, opnd.reg);
            emitpcode(PC_OR, tmpreg2, tmpreg1, opnd.reg);
            emitpcode(PC_RLWINM, tmpreg3, tmpreg2, 1, 31, 31);
            emitpcode(PC_RLWIMI, tmpreg3, opnd.regHi, 0, 0, 0);
            emitpcode(PC_MR, reg, opnd.regHi);
            emitpcode(PC_SRAWI, regHi, value, 31);
        } else {
            emitpcode(PC_MR, reg, opnd.regHi);
            emitpcode(PC_SRAWI, regHi, opnd.regHi, 31);
        }
    } else if (value <= 63) {
        if (is_unsigned) {
            emitpcode(PC_RLWINM, reg, opnd.regHi, 64 - value, value - 32, 31);
            emitpcode(PC_LI, regHi, 0);
        } else if (unk) {
            tmpreg1 = ALLOC_GPR();
            tmpreg2 = ALLOC_GPR();
            tmpreg3 = ALLOC_GPR();
            tmpreg4 = ALLOC_GPR();
            emitpcode(PC_NEG, tmpreg1, opnd.reg);
            emitpcode(PC_OR, tmpreg2, tmpreg1, opnd.reg);
            emitpcode(PC_RLWINM, tmpreg3, tmpreg2, 1, 31, 31);
            emitpcode(PC_OR, tmpreg4, opnd.regHi, tmpreg3);
            emitpcode(PC_SRAWI, regHi, opnd.regHi, 31);
            emitpcode(PC_SRAWI, reg, tmpreg4, value - 32);
        } else {
            emitpcode(PC_SRAWI, reg, opnd.regHi, value - 32);
            emitpcode(PC_SRAWI, regHi, opnd.regHi, 31);
        }
    } else {
        CError_FATAL(7866);
    }
}

void I8_gen_MUL(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    int is_uns;
    ENode *left;
    ENode *right;
    short reg;
    short regHi;
    short tmpreg1;
    short tmpreg2;
    short tmpreg3;
    short tmpreg4;
    SInt32 skipleft;
    SInt32 skipright;
    Operand opleft;
    Operand opright;
    SInt64 leftval;
    SInt64 rightval;
    int shift;

    left = expr->data.diadic.left;
    right = expr->data.diadic.right;
    memclrw(&opleft, sizeof(Operand));
    memclrw(&opright, sizeof(Operand));
    skipleft = GetSizeSkip(left);
    skipright = GetSizeSkip(right);

    if (ENODE_IS(right, EINTCONST) && ENODE_IS(left, EINTCONST))
        CError_FATAL(7900);

    if (ENODE_IS(left, EINTCONST))
        leftval = left->data.intval.lo + (((SInt64) ((skipleft < 8) ? 0 : left->data.intval.hi)) << 32);
    if (ENODE_IS(right, EINTCONST))
        rightval = right->data.intval.lo + (((SInt64) ((skipright < 8) ? 0 : right->data.intval.hi)) << 32);

    if (right->hascall) {
        GEN_NODE(right, &opright);
        if (TYPE_IS_8BYTES(right->rtype))
            coerce_to_register_pair(&opright, right->rtype, 0, 0);
        else
            ENSURE_GPR(&opright, right->rtype, 0);

        if (!(ENODE_IS(left, EINTCONST) && I8_log2n(leftval) > 0)) {
            GEN_NODE(left, &opleft);
            if (TYPE_IS_8BYTES(left->rtype))
                coerce_to_register_pair(&opleft, left->rtype, 0, 0);
            else
                ENSURE_GPR(&opleft, left->rtype, 0);
        }
    } else {
        if (!(ENODE_IS(left, EINTCONST) && I8_log2n(leftval) > 0)) {
            GEN_NODE(left, &opleft);
            if (TYPE_IS_8BYTES(left->rtype))
                coerce_to_register_pair(&opleft, left->rtype, 0, 0);
            else
                ENSURE_GPR(&opleft, left->rtype, 0);
        }

        if (!(ENODE_IS(right, EINTCONST) && I8_log2n(rightval) > 0)) {
            GEN_NODE(right, &opright);
            if (TYPE_IS_8BYTES(right->rtype))
                coerce_to_register_pair(&opright, right->rtype, 0, 0);
            else
                ENSURE_GPR(&opright, right->rtype, 0);
        }
    }

    is_uns = is_unsigned(expr->rtype) != 0;

    if (skipleft < skipright) {
        Operand tmpop;
        SInt64 tmp64;
        SInt32 tmp;

        expr->data.diadic.left = right;
        expr->data.diadic.right = left;
        left = expr->data.diadic.left;
        right = expr->data.diadic.right;

        tmpop = opright;
        opright = opleft;
        opleft = tmpop;

        tmp64 = leftval;
        leftval = rightval;
        rightval = tmp64;

        tmp = skipleft;
        skipleft = skipright;
        skipright = tmp;
    }

    reg = ALLOC_GPR();
    regHi = ALLOC_GPR();

    if (ENODE_IS(left, EINTCONST) && (shift = I8_log2n(leftval)) > 0) {
        I8_ShiftLeftImmediate(opright, shift, is_uns, skipright, reg, regHi);
    } else if (ENODE_IS(right, EINTCONST) && (shift = I8_log2n(rightval)) > 0) {
        I8_ShiftLeftImmediate(opleft, shift, is_uns, skipleft, reg, regHi);
    } else {
        switch (skipleft + skipright) {
            case 1 + 1:
            case 1 + 2:
            case 2 + 2:
                if (ENODE_IS(left, EINTCONST) && FITS_IN_SHORT2(left->data.intval.lo)) {
                    emitpcode(PC_MULLI, reg, opright.reg, LOW_PART(left->data.intval.lo));
                } else if (ENODE_IS(right, EINTCONST) && FITS_IN_SHORT2(right->data.intval.lo)) {
                    emitpcode(PC_MULLI, reg, opleft.reg, LOW_PART(right->data.intval.lo));
                } else {
                    emitpcode(PC_MULLW, reg, opleft.reg, opright.reg);
                }
                if (is_uns)
                    emitpcode(PC_LI, regHi, 0);
                else
                    emitpcode(PC_SRAWI, regHi, reg, 31);
                break;
            case 1 + 4:
            case 2 + 4:
            case 4 + 4:
                if (ENODE_IS(left, EINTCONST) && FITS_IN_SHORT2(left->data.intval.lo)) {
                    emitpcode(PC_MULLI, reg, opright.reg, LOW_PART(left->data.intval.lo));
                } else if (ENODE_IS(right, EINTCONST) && FITS_IN_SHORT2(right->data.intval.lo)) {
                    emitpcode(PC_MULLI, reg, opleft.reg, LOW_PART(right->data.intval.lo));
                } else {
                    emitpcode(PC_MULLW, reg, opleft.reg, opright.reg);
                }
                if (is_uns)
                    emitpcode(PC_MULHWU, regHi, opleft.reg, opright.reg);
                else
                    emitpcode(PC_MULHW, regHi, opleft.reg, opright.reg);
                break;
            case 1 + 8:
            case 2 + 8:
            case 4 + 8:
                CError_ASSERT(8097, skipleft == 8);
                if (ENODE_IS(left, EINTCONST) && FITS_IN_SHORT2(left->data.intval.lo) && left->data.intval.hi == 0) {
                    emitpcode(PC_MULLI, reg, opright.reg, LOW_PART(left->data.intval.lo));
                    if (is_uns)
                        emitpcode(PC_MULHWU, regHi, opright.reg, opleft.reg);
                    else
                        emitpcode(PC_MULHW, regHi, opright.reg, opleft.reg);
                } else if (ENODE_IS(right, EINTCONST) && FITS_IN_SHORT2(right->data.intval.lo) && right->data.intval.hi == 0) {
                    tmpreg1 = ALLOC_GPR();
                    tmpreg2 = ALLOC_GPR();
                    if (is_uns) {
                        emitpcode(PC_MULHWU, tmpreg2, opleft.reg, opright.reg);
                        emitpcode(PC_MULLI, tmpreg1, opleft.regHi, LOW_PART(right->data.intval.lo));
                        emitpcode(PC_MULLI, reg, opleft.reg, LOW_PART(right->data.intval.lo));
                        emitpcode(PC_ADD, regHi, tmpreg2, tmpreg1);
                    } else {
                        tmpreg3 = ALLOC_GPR();
                        tmpreg4 = ALLOC_GPR();
                        emitpcode(PC_SRAWI, tmpreg4, opright.reg, 31);
                        emitpcode(PC_MULHWU, tmpreg2, opleft.reg, opright.reg);
                        emitpcode(PC_MULLI, tmpreg1, opleft.regHi, LOW_PART(right->data.intval.lo));
                        emitpcode(PC_MULLI, reg, opleft.reg, LOW_PART(right->data.intval.lo));
                        emitpcode(PC_MULLW, tmpreg3, opleft.reg, tmpreg4);
                        emitpcode(PC_ADD, regHi, tmpreg2, tmpreg1);
                        emitpcode(PC_ADD, regHi, regHi, tmpreg3);
                    }
                } else {
                    tmpreg1 = ALLOC_GPR();
                    tmpreg2 = ALLOC_GPR();
                    if (is_uns) {
                        emitpcode(PC_MULHWU, tmpreg2, opleft.reg, opright.reg);
                        emitpcode(PC_MULLW, tmpreg1, opleft.regHi, opright.reg);
                        emitpcode(PC_MULLW, reg, opleft.reg, opright.reg);
                        emitpcode(PC_ADD, regHi, tmpreg2, tmpreg1);
                    } else {
                        tmpreg3 = ALLOC_GPR();
                        tmpreg4 = ALLOC_GPR();
                        emitpcode(PC_SRAWI, tmpreg4, opright.reg, 31);
                        emitpcode(PC_MULHWU, tmpreg2, opleft.reg, opright.reg);
                        emitpcode(PC_MULLW, tmpreg1, opleft.regHi, opright.reg);
                        emitpcode(PC_MULLW, reg, opleft.reg, opright.reg);
                        emitpcode(PC_MULLW, tmpreg3, opleft.reg, tmpreg4);
                        emitpcode(PC_ADD, regHi, tmpreg2, tmpreg1);
                        emitpcode(PC_ADD, regHi, regHi, tmpreg3);
                    }
                }
                break;
            case 8 + 8:
                if (ENODE_IS(left, EINTCONST) && FITS_IN_SHORT2(left->data.intval.lo) && left->data.intval.hi == 0) {
                    tmpreg1 = ALLOC_GPR();
                    tmpreg2 = ALLOC_GPR();
                    emitpcode(PC_MULHWU, tmpreg1, opright.reg, opleft.reg);
                    emitpcode(PC_MULLW, tmpreg2, opright.reg, opleft.regHi);
                    emitpcode(PC_MULLI, reg, opright.reg, LOW_PART(left->data.intval.lo));
                    emitpcode(PC_ADD, regHi, tmpreg1, tmpreg2);
                } else if (ENODE_IS(right, EINTCONST) && FITS_IN_SHORT2(right->data.intval.lo) && right->data.intval.hi == 0) {
                    tmpreg1 = ALLOC_GPR();
                    tmpreg2 = ALLOC_GPR();
                    emitpcode(PC_MULHWU, tmpreg2, opleft.reg, opright.reg);
                    emitpcode(PC_MULLW, tmpreg1, opleft.regHi, opright.reg);
                    emitpcode(PC_MULLI, reg, opleft.reg, LOW_PART(right->data.intval.lo));
                    emitpcode(PC_ADD, regHi, tmpreg2, tmpreg1);
                } else {
                    tmpreg1 = ALLOC_GPR();
                    tmpreg2 = ALLOC_GPR();
                    tmpreg3 = ALLOC_GPR();
                    tmpreg4 = ALLOC_GPR();
                    emitpcode(PC_MULHWU, tmpreg2, opleft.reg, opright.reg);
                    emitpcode(PC_MULLW, tmpreg1, opleft.regHi, opright.reg);
                    emitpcode(PC_ADD, tmpreg3, tmpreg2, tmpreg1);
                    emitpcode(PC_MULLW, tmpreg4, opleft.reg, opright.regHi);
                    emitpcode(PC_MULLW, reg, opleft.reg, opright.reg);
                    emitpcode(PC_ADD, regHi, tmpreg3, tmpreg4);
                }
                break;
            default:
                CError_FATAL(8218);
        }
    }

    output->optype = OpndType_GPRPair;
    output->reg = reg;
    output->regHi = regHi;
}

void I8_gen_BINNOT(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    ENode *inner;
    Operand op;
    int reg;
    int regHi;

    inner = expr->data.monadic;
    memclrw(&op, sizeof(Operand));
    GEN_NODE(inner, &op);
    coerce_to_register_pair(&op, inner->rtype, 0, 0);

    reg = outputReg ? outputReg : ALLOC_GPR();
    regHi = outputRegHi ? outputRegHi : ALLOC_GPR();
    emitpcode(PC_NOR, reg, op.reg, op.reg);
    emitpcode(PC_NOR, regHi, op.regHi, op.regHi);

    output->optype = OpndType_GPRPair;
    output->reg = reg;
    output->regHi = regHi;
}

void I8_gen_MONMIN(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    ENode *inner;
    Operand op;
    int reg;
    int regHi;

    inner = expr->data.monadic;
    memclrw(&op, sizeof(Operand));
    GEN_NODE(inner, &op);
    coerce_to_register_pair(&op, inner->rtype, 0, 0);

    reg = outputReg ? outputReg : ALLOC_GPR();
    regHi = outputRegHi ? outputRegHi : ALLOC_GPR();
    emitpcode(PC_SUBFIC, reg, op.reg, 0);
    emitpcode(PC_SUBFZE, regHi, op.regHi);

    output->optype = OpndType_GPRPair;
    output->reg = reg;
    output->regHi = regHi;
}

void I8_gen_ASS(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    Type *type;
    ENode *left;
    ENode *right;
    Operand opleft;
    Operand opright;
    VarInfo *vi;

    type = expr->rtype;
    if (ENODE_IS(expr, ECONDASS)) {
        left = expr->data.cond.expr1;
        if (ENODE_IS(left, EINDIRECT))
            left = left->data.monadic;
        else
            CError_FATAL(8328);
        right = expr->data.cond.expr2;
    } else {
        left = expr->data.diadic.left;
        right = expr->data.diadic.right;
    }

    memclrw(&opleft, sizeof(Operand));
    memclrw(&opright, sizeof(Operand));

    if (ENODE_IS(left, EOBJREF) && OBJECT_REG(left->data.objref)) {
        vi = Registers_GetVarInfo(left->data.objref);
        GEN_NODE_TO_REG(right, vi->reg, vi->regHi, &opright);
        if (vi->rclass != RegClass_GPR) {
            CError_FATAL(8348);
        } else {
            coerce_to_register_pair(&opright, type, vi->reg, vi->regHi);
            *output = opright;
        }
        return;
    }

    if (TYPE_FITS_IN_REGISTER(type)) {
        GEN_NODE(right, &opright);
        coerce_to_register_pair(&opright, right->rtype, 0, 0);

        if (ENODE_IS(left, EBITFIELD)) {
            CError_FATAL(8376);
        } else {
            GEN_NODE(left, &opleft);
            indirect(&opleft, left);
            store_pair(opright.reg, opright.regHi, &opleft, type);
        }

        output->optype = OpndType_GPRPair;
        output->reg = opright.reg;
        output->regHi = opright.regHi;
    }
}

void I8_gen_POSTINCDEC(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    ENode *inner;
    Type *type;
    int flag;
    int reg;
    int regHi;
    Operand op1;
    Operand op2;
    Operand op3;

    inner = expr->data.monadic->data.monadic;
    type = expr->rtype;
    flag = 0;
    memclrw(&op1, sizeof(Operand));
    memclrw(&op2, sizeof(Operand));

    if (ENODE_IS(inner, EOBJREF) && (reg = OBJECT_REG(inner->data.objref))) {
        regHi = Registers_GetVarInfo(inner->data.objref)->regHi;
        output->optype = OpndType_GPRPair;
        output->reg = (outputReg && outputReg != reg && outputReg != regHi) ? outputReg : ALLOC_GPR();
        output->regHi = (outputRegHi && outputRegHi != regHi && outputRegHi != reg) ? outputRegHi : ALLOC_GPR();
        emitpcode(PC_MR, output->reg, reg);
        emitpcode(PC_MR, output->regHi, regHi);
        if (ENODE_IS(expr, EPOSTINC)) {
            emitpcode(PC_ADDIC, reg, reg, 1);
            emitpcode(PC_ADDME, regHi, regHi);
        } else {
            emitpcode(PC_ADDIC, reg, reg, -1);
            emitpcode(PC_ADDZE, regHi, regHi);
        }
        return;
    }

    CError_ASSERT(8446, !ENODE_IS(inner, EBITFIELD));

    GEN_NODE(inner, &op1);
    indirect(&op1, inner);
    op2 = op1;
    coerce_to_register_pair(&op2, type, 0, 0);

    output->optype = OpndType_GPRPair;
    output->reg = ALLOC_GPR();
    output->regHi = ALLOC_GPR();

    emitpcode(PC_MR, output->reg, op2.reg);
    emitpcode(PC_MR, output->regHi, op2.regHi);

    reg = ALLOC_GPR();
    regHi = ALLOC_GPR();

    if (ENODE_IS(expr, EPOSTINC)) {
        emitpcode(PC_ADDIC, reg, op2.reg, 1);
        emitpcode(PC_ADDZE, regHi, op2.regHi);
    } else {
        emitpcode(PC_ADDIC, reg, op2.reg, -1);
        emitpcode(PC_ADDME, regHi, op2.regHi);
    }
    store_pair(reg, regHi, &op1, type);
}

void I8_gen_INDIRECT(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    ENode *inner;
    VarInfo *vi;

    inner = expr->data.monadic;
    if (ENODE_IS(inner, EOBJREF) && OBJECT_REG(inner->data.objref)) {
        vi = Registers_GetVarInfo(inner->data.objref);
        switch (vi->rclass) {
            case RegClass_GPR:
                output->optype = OpndType_GPRPair;
                break;
            case RegClass_FPR:
                output->optype = OpndType_FPR;
                break;
            default:
                CError_FATAL(8511);
        }

        output->reg = vi->reg;
        output->regHi = vi->regHi;
        output->object = NULL;
        return;
    }

    if (ENODE_IS(inner, EBITFIELD)) {
        CError_FATAL(8529);
        return;
    }

    GEN_NODE(inner, output);
    indirect(output, inner);
}

void I8_gen_condition(ENode *cond, Operand *output, int write_to_gpr) {
    ENode *left;
    ENode *right;
    Operand opleft;
    Operand opright;
    Operand tmpop;
    int reg1;
    int reg2;
    int reg3;
    int reg4;
    int reg5;

    left = cond->data.diadic.left;
    right = cond->data.diadic.right;
    memclrw(&opleft, sizeof(Operand));
    memclrw(&opright, sizeof(Operand));
    memclrw(&tmpop, sizeof(Operand));

    if (right->hascall) {
        GEN_NODE(right, &opright);
        if (right->rtype->size < 4)
            extend32(&opright, right->rtype, 0);
        ENSURE_GPR(&opright, right->rtype, 0);

        if (right->rtype->size < 8) {
            short tmp = ALLOC_GPR();
            if (is_unsigned(right->rtype))
                load_immediate(tmp, 0);
            else
                emitpcode(PC_SRAWI, tmp, opright.reg, 31);
            opright.optype = OpndType_GPRPair;
            opright.regHi = tmp;
        }

        GEN_NODE(left, &opleft);
        if (left->rtype->size < 4)
            extend32(&opleft, left->rtype, 0);
        ENSURE_GPR(&opleft, left->rtype, 0);

        if (left->rtype->size < 8) {
            short tmp = ALLOC_GPR();
            // this looks like a bug??? surely this should check left->rtype
            if (is_unsigned(right->rtype))
                load_immediate(tmp, 0);
            else
                emitpcode(PC_SRAWI, tmp, opleft.reg, 31);
            opleft.optype = OpndType_GPRPair;
            opleft.regHi = tmp;
        }
    } else {
        GEN_NODE(left, &opleft);
        ENSURE_GPR(&opleft, left->rtype, 0);
        if (left->rtype->size < 4)
            extend32(&opleft, left->rtype, 0);

        if (left->rtype->size < 8) {
            short tmp = ALLOC_GPR();
            if (is_unsigned(right->rtype))
                load_immediate(tmp, 0);
            else
                emitpcode(PC_SRAWI, tmp, opleft.reg, 31);
            opleft.optype = OpndType_GPRPair;
            opleft.regHi = tmp;
        }

        GEN_NODE(right, &opright);
        if (right->rtype->size < 4)
            extend32(&opright, right->rtype, 0);
        ENSURE_GPR(&opright, right->rtype, 0);

        if (right->rtype->size < 8) {
            short tmp = ALLOC_GPR();
            if (is_unsigned(right->rtype))
                load_immediate(tmp, 0);
            else
                emitpcode(PC_SRAWI, tmp, opright.reg, 31);
            opright.optype = OpndType_GPRPair;
            opright.regHi = tmp;
        }
    }

    CError_ASSERT(8704, opleft.optype == OpndType_GPRPair && opright.optype == OpndType_GPRPair);

    switch (cond->type) {
        case EEQU:
        case ENOTEQU:
            reg1 = ALLOC_GPR();
            reg2 = ALLOC_GPR();
            emitpcode(PC_XOR, reg1, opleft.reg, opright.reg);
            emitpcode(PC_XOR, reg2, opleft.regHi, opright.regHi);
            emitpcode(PC_OR, reg2, reg1, reg2);
            if (write_to_gpr) {
                if (ENODE_IS(cond, EEQU)) {
                    emitpcode(PC_CNTLZW, reg2, reg2);
                    emitpcode(PC_RLWINM, reg2, reg2, 27, 5, 31);
                } else {
                    emitpcode(PC_ADDIC, reg1, reg2, -1);
                    emitpcode(PC_SUBFE, reg2, reg1, reg2);
                }
                output->optype = OpndType_GPR;
                output->reg = reg2;
                output->regHi = 0;
            } else {
                emitpcode(PC_CMPI, 0, reg2, 0);
                output->optype = OpndType_CRField;
                output->reg = 0;
                output->regOffset = cond->type;
            }
            break;
        case EGREATER:
            tmpop = opleft;
            opleft = opright;
            opright = tmpop;
        case ELESS:
            reg1 = ALLOC_GPR();
            reg2 = ALLOC_GPR();
            reg3 = ALLOC_GPR();
            if (left->rtype != TYPE(&stunsignedlonglong) && right->rtype != TYPE(&stunsignedlonglong)) {
                emitpcode(PC_XORIS, reg1, opleft.regHi, 0x8000);
                emitpcode(PC_XORIS, reg2, opright.regHi, 0x8000);
                reg4 = reg1;
                reg5 = reg2;
            } else {
                reg4 = opleft.regHi;
                reg5 = opright.regHi;
            }
            emitpcode(PC_SUBFC, reg3, opright.reg, opleft.reg);
            emitpcode(PC_SUBFE, reg2, reg5, reg4);
            emitpcode(PC_SUBFE, reg2, reg1, reg1);
            emitpcode(PC_NEG, reg2, reg2);
            if (write_to_gpr) {
                output->optype = OpndType_GPR;
                output->reg = reg2;
                output->regHi = 0;
            } else {
                emitpcode(PC_CMPI, 0, reg2, 0);
                output->optype = OpndType_CRField;
                output->reg = 0;
                output->regOffset = ENOTEQU;
            }
            break;
        case ELESSEQU:
            tmpop = opleft;
            opleft = opright;
            opright = tmpop;
        case EGREATEREQU:
            reg1 = ALLOC_GPR();
            reg2 = ALLOC_GPR();
            reg3 = ALLOC_GPR();
            if (left->rtype != TYPE(&stunsignedlonglong) && right->rtype != TYPE(&stunsignedlonglong)) {
                emitpcode(PC_XORIS, reg1, opleft.regHi, 0x8000);
                emitpcode(PC_XORIS, reg2, opright.regHi, 0x8000);
                reg4 = reg1;
                reg5 = reg2;
            } else {
                reg4 = opleft.regHi;
                reg5 = opright.regHi;
            }
            emitpcode(PC_SUBFC, reg3, opright.reg, opleft.reg);
            emitpcode(PC_SUBFE, reg2, reg5, reg4);
            emitpcode(PC_SUBFE, reg2, reg1, reg1);
            emitpcode(PC_NEG, reg2, reg2);
            if (write_to_gpr) {
                emitpcode(PC_SUBFIC, reg2, reg2, 1);
                output->optype = OpndType_GPR;
                output->reg = reg2;
                output->regHi = 0;
            } else {
                emitpcode(PC_CMPI, 0, reg2, 0);
                output->optype = OpndType_CRField;
                output->reg = 0;
                output->regOffset = EEQU;
            }
            break;
        default:
            CError_FATAL(8814);
    }
}

void I8_gen_SHL_SHR(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    static UInt32 used_regs[RegClassMax] = {0, 0, 0, 0, (1 << 3) | (1 << 4) | (1 << 5)};

    ENode *left;
    ENode *right;
    Operand opleft;
    Operand opright;
    int is_uns;

    left = expr->data.diadic.left;
    right = expr->data.diadic.right;
    memclrw(&opleft, sizeof(Operand));
    memclrw(&opright, sizeof(Operand));

    GEN_NODE(left, &opleft);
    coerce_to_register_pair(&opleft, left->rtype, 0, 0);

    output->optype = OpndType_GPRPair;
    output->reg = ALLOC_GPR();
    output->regHi = ALLOC_GPR();

    is_uns = is_unsigned(expr->rtype) != 0;

    if (ENODE_IS(right, EINTCONST)) {
        if (ENODE_IS(expr, ESHL)) {
            I8_ShiftLeftImmediate(opleft, right->data.intval.lo, is_uns, expr->rtype->size, output->reg, output->regHi);
        } else {
            I8_ShiftRightImmediate(opleft, right->data.intval.lo, is_uns, output->reg, output->regHi, 0);
        }
        return;
    }

    GEN_NODE(right, &opright);
    ENSURE_GPR(&opright, right->rtype, 0);
    if (opright.optype == OpndType_GPRPair) {
        opright.regHi = 0;
        opright.optype = OpndType_GPR;
    }

    CError_ASSERT(8890, opleft.optype == OpndType_GPRPair && opright.optype == OpndType_GPR);

    if (opleft.regHi != high_reg)
        emitpcode(PC_MR, high_reg, opleft.regHi);
    if (opleft.reg != low_reg)
        emitpcode(PC_MR, low_reg, opleft.reg);
    if (opright.reg != 5)
        emitpcode(PC_MR, 5, opright.reg);

    if (ENODE_IS(expr, ESHR)) {
        if (is_unsigned(left->rtype))
            branch_subroutine(rt_shr2u, 0, used_regs);
        else
            branch_subroutine(rt_shr2i, 0, used_regs);
    } else if (ENODE_IS(expr, ESHL)) {
        branch_subroutine(rt_shl2i, 0, used_regs);
    } else {
        CError_FATAL(8909);
    }

    emitpcode(PC_MR, output->reg, low_reg);
    emitpcode(PC_MR, output->regHi, high_reg);
}

void I8_gen_DIV_MOD(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    static UInt32 used_regs[RegClassMax] = {0, 0, 0, 0, (1 << 3) | (1 << 4) | (1 << 5) | (1 << 6)};

    int is_uns;
    ENode *left;
    ENode *right;
    Operand opleft;
    Operand opright;
    SInt64 constval;
    int shift;

    left = expr->data.diadic.left;
    right = expr->data.diadic.right;
    memclrw(&opleft, sizeof(Operand));
    memclrw(&opright, sizeof(Operand));

    GEN_NODE(left, &opleft);
    coerce_to_register_pair(&opleft, left->rtype, 0, 0);

    output->optype = OpndType_GPRPair;
    output->reg = ALLOC_GPR();
    output->regHi = ALLOC_GPR();

    is_uns = is_unsigned(expr->rtype) != 0;

    if (ENODE_IS(right, EINTCONST))
        constval = (((SInt64) right->data.intval.hi) << 32) + right->data.intval.lo;
    if (ENODE_IS(right, EINTCONST) && ((shift = I8_log2n(constval)) > 0)) {
        CError_ASSERT(8976, opleft.optype == OpndType_GPRPair);
        if (ENODE_IS(expr, EDIV)) {
            I8_ShiftRightImmediate(opleft, shift, is_uns, output->reg, output->regHi, 1);
            if (!is_uns) {
                emitpcode(PC_ADDZE, output->reg, output->reg);
                emitpcode(PC_ADDZE, output->regHi, output->regHi);
            }
        } else {
            if (is_uns) {
                if (shift < 32) {
                    emitpcode(PC_LI, output->regHi, 0);
                    emitpcode(PC_RLWINM, output->reg, opleft.reg, 0, 32 - shift, 31);
                } else if (shift == 32) {
                    emitpcode(PC_LI, output->regHi, 0);
                    emitpcode(PC_MR, output->reg, opleft.reg);
                } else if (shift <= 63) {
                    emitpcode(PC_RLWINM, output->regHi, opleft.regHi, 0, 32 - (shift - 32), 31);
                    emitpcode(PC_MR, output->reg, opleft.reg);
                } else {
                    CError_FATAL(9018);
                }
            } else {
                short tmpreg1 = ALLOC_GPR();
                short tmpreg2 = ALLOC_GPR();
                I8_ShiftRightImmediate(opleft, shift, is_uns, output->reg, output->regHi, 1);
                emitpcode(PC_ADDZE, output->reg, output->reg);
                emitpcode(PC_ADDZE, output->regHi, output->regHi);
                I8_ShiftLeftImmediate(*output, shift, is_uns, expr->rtype->size, tmpreg1, tmpreg2);
                emitpcode(PC_SUBFC, output->reg, tmpreg1, opleft.reg);
                emitpcode(PC_SUBFE, output->regHi, tmpreg2, opleft.regHi);
            }
        }
        return;
    }

    GEN_NODE(right, &opright);
    coerce_to_register_pair(&opright, right->rtype, 0, 0);

    CError_ASSERT(9048, opleft.optype == OpndType_GPRPair && opright.optype == OpndType_GPRPair);

    if (opleft.regHi != high_reg)
        emitpcode(PC_MR, high_reg, opleft.regHi);
    if (opleft.reg != low_reg)
        emitpcode(PC_MR, low_reg, opleft.reg);
    if (opright.regHi != high_reg2)
        emitpcode(PC_MR, high_reg2, opright.regHi);
    if (opright.reg != low_reg2)
        emitpcode(PC_MR, low_reg2, opright.reg);

    if (ENODE_IS(expr, EDIV)) {
        if (is_unsigned(left->rtype) || is_unsigned(right->rtype))
            branch_subroutine(rt_div2u, 0, used_regs);
        else
            branch_subroutine(rt_div2i, 0, used_regs);
    } else if (ENODE_IS(expr, EMODULO)) {
        if (is_unsigned(left->rtype) || is_unsigned(right->rtype))
            branch_subroutine(rt_mod2u, 0, used_regs);
        else
            branch_subroutine(rt_mod2i, 0, used_regs);
    } else {
        CError_FATAL(9074);
    }

    emitpcode(PC_MR, output->reg, low_reg);
    emitpcode(PC_MR, output->regHi, high_reg);
}

void I8_gen_TYPCON(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    Type *dsttype;
    ENode *inner;
    Type *srctype;
    short regHi;
    short reg;

    static UInt32 used_regs[RegClassMax] = {0, 0, 0, 0, (1 << 3) | (1 << 4)};
    static UInt32 used_regs_f1[RegClassMax] = {0, 0, 0, (1 << 1), 0};

    inner = expr->data.monadic;
    srctype = inner->rtype;
    dsttype = expr->rtype;

    if (IS_TYPE_VOID(dsttype)) {
        GEN_NODE(inner, output);
        if (ENODE_IS(inner, EINDIRECT) && (output->flags & OpndFlags_Volatile))
            coerce_to_register_pair(output, inner->rtype, 0, 0);
        output->optype = OpndType_Absolute;
        output->immediate = 0;
        return;
    }

    if (IS_TYPE_INT_OR_ENUM(srctype)) {
        if (IS_TYPE_FLOAT(dsttype)) {
            GEN_NODE(inner, output);
            coerce_to_register_pair(output, srctype, 0, 0);
            if (output->regHi != high_reg)
                emitpcode(PC_MR, high_reg, output->regHi);
            if (output->reg != low_reg)
                emitpcode(PC_MR, low_reg, output->reg);

            if (is_unsigned(srctype)) {
                branch_subroutine(
                        (dsttype->size == 4) ? rt_cvt_ull_flt : rt_cvt_ull_dbl,
                        0,
                        used_regs);
            } else {
                branch_subroutine(
                        (dsttype->size == 4) ? rt_cvt_sll_flt : rt_cvt_sll_dbl,
                        0,
                        used_regs);
            }

            output->optype = OpndType_FPR;
            output->reg = ALLOC_FPR();
            emitpcode(PC_FMR, output->reg, 1);
            return;
        }

        if (srctype->size < dsttype->size) {
            CError_ASSERT(9171, TYPE_IS_8BYTES(dsttype));

            GEN_NODE(inner, output);
            if (srctype->size < 4 &&
                    !ENODE_IS_INDIRECT_TO(inner, EBITFIELD) &&
                    !((ENODE_IS_ASSIGN(inner) || ENODE_IS_RANGE(inner, EPOSTINC, EPREDEC)) && ENODE_IS(inner->data.monadic->data.monadic, EBITFIELD))
                    ) {
                extend32(output, srctype, outputReg);
            }
            extend64(output, srctype, outputReg, outputRegHi);
        } else {
            GEN_NODE_TO_REG(inner, outputReg, 0, output);
            if (dsttype->size < srctype->size) {
                coerce_to_register_pair(output, srctype, outputReg, outputRegHi);
                output->optype = OpndType_GPR;
                output->regHi = 0;
            }
        }
        return;
    }

    if (IS_TYPE_POINTER(srctype)) {
        GEN_NODE_TO_REG(inner, outputReg, 0, output);
        CError_ASSERT(9200, TYPE_IS_8BYTES(expr->rtype));
        GEN_NODE_TO_REG(inner, outputReg, 0, output);

        regHi = outputRegHi ? outputRegHi : ALLOC_GPR();
        if (regHi == output->reg) {
            reg = outputReg ? outputReg : ALLOC_GPR();
            emitpcode(PC_MR, reg, output->reg);
            output->reg = reg;
        }
        if (is_unsigned(inner->rtype))
            load_immediate(regHi, 0);
        else
            emitpcode(PC_SRAWI, regHi, output->reg, 31);
        output->optype = OpndType_GPRPair;
        output->regHi = regHi;
        return;
    }

    if (IS_TYPE_FLOAT(srctype)) {
        if (IS_TYPE_FLOAT(dsttype)) {
            CError_FATAL(9222);
            return;
        }

        GEN_NODE(inner, output);
        ENSURE_FPR(output, srctype, 0);
        if (output->reg != 1)
            emitpcode(PC_FMR, 1, output->reg);

        branch_subroutine(rt_cvt_dbl_usll, 0, used_regs_f1);

        output->optype = OpndType_GPRPair;
        output->reg = ALLOC_GPR();
        output->regHi = ALLOC_GPR();
        emitpcode(PC_MR, output->reg, low_reg);
        emitpcode(PC_MR, output->regHi, high_reg);
        return;
    }

    if (IS_TYPE_STRUCT(srctype)) {
        GEN_NODE_TO_REG(inner, outputReg, 0, output);

        if (TYPE_IS_8BYTES(expr->rtype) && dsttype->size == srctype->size) {
            coerce_to_register_pair(output, srctype, outputReg, outputRegHi);
        } else {
            CError_FATAL(9256);
        }
        return;
    }

    CError_FATAL(9261);
}

void gen_VECTOR128CONST(ENode *expr, short outputReg, short outputRegHi, Operand *output) {
    int gpr;
    int vr;
    COVCResult result;

    vr = outputReg ? outputReg : ALLOC_VR();
    if (!canoptimizevectorconst(&expr->data.vector128val, expr->rtype, &result))
        CError_FATAL(9282);

    if (result.op1 != -1) {
        emitpcode(result.op1, vr, result.arg);
        output->optype = OpndType_VR;
        output->reg = vr;
        return;
    }

    if (result.op2 != -1) {
        gpr = ALLOC_GPR();
        emitpcode(PC_LI, gpr, result.arg);
        emitpcode(result.op2, vr, 0, gpr);
        output->optype = OpndType_VR;
        output->reg = vr;
        return;
    }

    CError_FATAL(9298);
}