MWCC/compiler_and_linker/unsorted/InlineAsmPPC.c

#include "compiler/InlineAsmPPC.h"
#include "compiler/CError.h"
#include "compiler/CInt64.h"
#include "compiler/CFunc.h"
#include "compiler/CMachine.h"
#include "compiler/CParser.h"
#include "compiler/CPrep.h"
#include "compiler/CPrepTokenizer.h"
#include "compiler/TOC.h"
#include "compiler/FuncLevelAsmPPC.h"
#include "compiler/InlineAsm.h"
#include "compiler/InlineAsmMnemonicsPPC.h"
#include "compiler/InlineAsmRegisters.h"
#include "compiler/InlineAsmRegistersPPC.h"
#include "compiler/CodeGen.h"
#include "compiler/CodeGenOptPPC.h"
#include "compiler/PPCError.h"
#include "compiler/RegisterInfo.h"
#include "compiler/objects.h"
#include "compiler/CExpr.h"
#include "compiler/PCode.h"
#include "compiler/PCodeUtilities.h"
#include "compiler/StackFrame.h"
#include "compiler/CompilerTools.h"
#include "compiler/Alias.h"

// TODO: move me
extern int countexceptionactionregisters(ExceptionAction *);
extern void noteexceptionactionregisters(ExceptionAction *, PCodeArg *);

char asm_alloc_flags[10];
Section sm_section;
UInt32 cpu;
SInt32 fralloc_parameter_area_size;
Boolean user_responsible_for_frame;
Boolean supports_hardware_fpu;
UInt32 assembledinstructions;
UInt8 assembler_type;
char volatileasm;
Boolean InlineAsm_gccmode;
Boolean InlineAsm_labelref;
CLabel *pic_base_label;

enum {
    NO_REG = 0,
    INVALID_PIC_REG = -2
};

// forward decls
static SInt32 InlineAsm_ConstantExpressionPPC(SInt32 value);
static Object *isvariableoperand(void);
static Object *isregisterstructpointeroperand(void);
static void registeroperand(IAOperand *op, char rclass, short effect);
static void DiadicOperatorPPC(IAExpr *left, short token, IAExpr *right);
static void InlineAsm_ExpressionPPC(IAExpr *expr, SInt32 value);
static void savepicbase(short reg, HashNameNode *name);

inline SInt32 ExtractValue(CInt64 value) {
    return (SInt32) CInt64_GetULong(&value);
}

static void IllegalObjectOperator(HashNameNode *name1, HashNameNode *name2, short token) {
    char *opstr;
    switch (token) {
        case '*': opstr = "*"; break;
        case '/': opstr = "/"; break;
        case '%': opstr = "%"; break;
        case '+': opstr = "+"; break;
        case '-': opstr = "-"; break;
        case TK_SHL: opstr = "<<"; break;
        case TK_SHR: opstr = ">>"; break;
        case '<': opstr = "<"; break;
        case '>': opstr = ">"; break;
        case TK_LESS_EQUAL: opstr = "<="; break;
        case TK_GREATER_EQUAL: opstr = ">="; break;
        case TK_LOGICAL_EQ: opstr = "=="; break;
        case TK_LOGICAL_NE: opstr = "!="; break;
        case '&': opstr = "&"; break;
        case '^': opstr = "^"; break;
        case '|': opstr = "|"; break;
        case TK_LOGICAL_AND: opstr = "&&"; break;
        case TK_LOGICAL_OR: opstr = "||"; break;
        default: opstr = "???";
    }

    if (!name2) {
        PPCError_Error(119, opstr, name1->name);
    } else if (!name1) {
        PPCError_Error(120, opstr, name2->name);
    } else {
        PPCError_Error(118, name1->name, opstr, name2->name);
    }
}

static void IllegalObjectInConst(IAExpr *expr) {
    if (expr->xC) {
        PPCError_Error(122, expr->xC->name->name);
    } else if (expr->object) {
        PPCError_Error(122, expr->object->name->name);
    } else if (expr->label) {
        PPCError_Error(166, expr->label->name->name);
    }
}

static void NotInRegisterError(char *name, char rclass) {
    PPCError_Error(167, name, register_class_name[rclass]);
}

static int isregisteroperand(char rclass) {
    IARegister *reg;

    return (tk == TK_IDENTIFIER && (reg = InlineAsm_LookupRegisterPPCName(tkidentifier)) && reg->rclass == rclass);
}

static SInt32 getcroperand(char rclass) {
    SInt32 value;
    IARegister *reg;

    value = 0;
    if (tk == TK_IDENTIFIER && (reg = InlineAsm_LookupRegisterPPCName(tkidentifier)) && reg->rclass == rclass) {
        value = reg->num;
    } else {
        PPCError_Error(167, tkidentifier->name);
    }

    tk = lex();
    return value;
}

static SInt32 getimmediateoperand(SInt32 minimum, SInt32 maximum) {
    SInt32 value = InlineAsm_ConstantExpressionPPC(0);
    if (value < minimum || value > maximum)
        CError_Error(CErrorStr154);
    return value;
}

static void PrimaryExpressionPPC(IAExpr *expr, SInt32 value) {
    Object *obj;
    IALookupResult result;
    IAExpr subexpr;
    IAExprType type = IAExpr_0;
    SInt32 v;

    switch (tk) {
        case TK_IDENTIFIER:
            if ((obj = isregisterstructpointeroperand())) {
                tk = lex();
                InlineAsm_InitExpr5(expr, InlineAsm_StructPointerMemberOffset(TPTR_TARGET(obj->type)));
                expr->object = obj;
                return;
            }

            if ((obj = isvariableoperand())) {
                short reg;
                InlineAsm_InitExpr5(expr, 0);
                expr->xC = obj;

                if (obj->datatype == DLOCAL)
                    reg = 1;
                else
                    reg = pic_base_reg;

                tk = lex();
                if (tk == '.' || tk == '[') {
                    InlineAsm_InitExpr5(&subexpr, InlineAsm_StructArrayMemberOffset(obj->type));
                    DiadicOperatorPPC(expr, '+', &subexpr);
                }

                if (tk == '+') {
                    tk = lex();
                    InlineAsm_ExpressionPPC(&subexpr, value);
                    DiadicOperatorPPC(expr, '+', &subexpr);
                } else if (tk == '-') {
                    tk = lex();
                    InlineAsm_ExpressionPPC(&subexpr, value);
                    DiadicOperatorPPC(expr, '-', &subexpr);
                } else if (!strcmp(tkidentifier->name, "@loword")) {
                    tk = lex();
                    if (low_offset) {
                        InlineAsm_InitExpr5(&subexpr, low_offset);
                        DiadicOperatorPPC(expr, '+', &subexpr);
                    }
                } else if (!strcmp(tkidentifier->name, "@hiword")) {
                    tk = lex();
                    if (high_offset) {
                        InlineAsm_InitExpr5(&subexpr, high_offset);
                        DiadicOperatorPPC(expr, '+', &subexpr);
                    }
                }
                expr->reg = reg;
                return;
            }

            if (InlineAsm_LookupSymbolOrTag(tkidentifier, &result, 1)) {
                if (result.has_value) {
                    tk = lex();
                    InlineAsm_InitExpr5(expr, result.value);
                    return;
                }

                if (result.type && (IS_TYPE_STRUCT(result.type) || IS_TYPE_CLASS(result.type))) {
                    tk = lex();
                    if (tk != '.')
                        CError_Error(CErrorStr120);

                    if (allow_array_expressions) {
                        InlineAsm_InitExpr5(expr, InlineAsm_StructArrayMemberOffset(result.type));
                        return;
                    }

                    InlineAsm_InitExpr5(expr, InlineAsm_StructMemberOffset(result.type));
                    return;
                }

                if (result.object && result.object->datatype == DABSOLUTE) {
                    tk = lex();
                    InlineAsm_InitExpr5(expr, result.object->u.address);
                    return;
                }
            } else if (value) {
                if (isregisteroperand(RegClass_CRFIELD)) {
                    InlineAsm_InitExpr5(expr, getcroperand(RegClass_CRFIELD));
                    return;
                }
                if (isregisteroperand(RegClass_6)) {
                    InlineAsm_InitExpr5(expr, getcroperand(RegClass_6));
                    return;
                }
                if (strlen(tkidentifier->name) == 6 && !strncmp(tkidentifier->name, "cr", 2) && tkidentifier->name[3] == '_') {
                    IARegister *reg;
                    char regname[4];
                    regname[0] = tkidentifier->name[0];
                    regname[1] = tkidentifier->name[1];
                    regname[2] = tkidentifier->name[2];
                    regname[3] = 0;
                    if ((reg = InlineAsm_LookupRegisterPPC(regname)) && reg->rclass == RegClass_CRFIELD) {
                        SInt32 v = reg->num * 4;
                        regname[0] = tkidentifier->name[4];
                        regname[1] = tkidentifier->name[5];
                        regname[2] = 0;
                        if ((reg = InlineAsm_LookupRegisterPPC(regname)) && reg->rclass == RegClass_6) {
                            tk = lex();
                            InlineAsm_InitExpr5(expr, v + reg->num);
                            return;
                        }
                    }
                }
            }

            if (!strcmp("ha16", tkidentifier->name))
                type = IAExpr_8;
            else if (!strcmp("hi16", tkidentifier->name))
                type = IAExpr_7;
            else if (!strcmp("lo16", tkidentifier->name))
                type = IAExpr_6;

            if (type != IAExpr_0) {
                tk = lex();
                if (tk == '(') {
                    SInt32 v;
                    tk = lex();
                    PrimaryExpressionPPC(expr, value);
                    expr->type = type;
                    if (tk != ')')
                        CError_Error(CErrorStr115);

                    tk = lex();
                    if (InlineAsm_CheckExpr(expr)) {
                        expr->value = InlineAsm_GetExprValue(expr);
                        expr->type = IAExpr_5;
                    }
                    return;
                }

                CError_Error(CErrorStr114);
            } else {
                if (!result.label)
                    result.label = InlineAsm_DeclareLabel(tkidentifier);

                InlineAsm_InitExpr5(expr, 0);
                expr->flags |= IAFlag1;
                expr->label = result.label;
                tk = lex();
                return;
            }
            break;

        case TK_INTCONST:
            v = CInt64_GetULong(&tkintconst);
            tk = lex();
            InlineAsm_InitExpr5(expr, v);
            return;

        case TK_SIZEOF:
            InlineAsm_InitExpr5(expr, scansizeof());
            return;

        case '+':
            tk = lex();
            PrimaryExpressionPPC(expr, value);
            return;

        case '-':
            tk = lex();
            PrimaryExpressionPPC(expr, value);
            if (InlineAsm_CheckExpr(expr))
                expr->value = -expr->value;
            else
                CError_Error(CErrorStr124);
            return;

        case '!':
            tk = lex();
            PrimaryExpressionPPC(expr, value);
            if (InlineAsm_CheckExpr(expr))
                expr->value = !expr->value;
            else
                CError_Error(CErrorStr124);
            return;

        case '~':
            tk = lex();
            PrimaryExpressionPPC(expr, value);
            if (InlineAsm_CheckExpr(expr))
                expr->value = ~expr->value;
            else
                CError_Error(CErrorStr124);
            return;

        case '(':
            tk = lex();
            InlineAsm_ExpressionPPC(expr, value);
            if (tk != ')')
                CError_Error(CErrorStr115);
            tk = lex();
            return;

        default:
            CError_Error(CErrorStr120);
    }

    InlineAsm_InitExpr5(expr, 0);
}

static void DiadicOperatorPPC(IAExpr *left, short token, IAExpr *right) {
    CInt64 leftval;
    CInt64 rightval;

    CInt64_SetLong(&leftval, left->value);
    CInt64_SetLong(&rightval, right->value);
    rightval = CMach_CalcIntDiadic(TYPE(&stsignedint), leftval, token, rightval);

    if (left->xC) {
        if (right->label)
            PPCError_Error(124, left->xC->name->name, right->label->name->name);

        if (right->xC) {
            if (left->x10) {
                PPCError_Error(121, left->xC->name->name, left->x10->name->name, right->xC->name->name);
            } else if (right->x10) {
                PPCError_Error(121, left->xC->name->name, right->xC->name->name, right->x10->name->name);
            } else if (token == '-') {
                left->value = CInt64_GetULong(&rightval);
                left->x10 = right->xC;
            } else {
                IllegalObjectOperator(left->xC->name, right->xC->name, token);
            }
        } else if (token == '-' || token == '+') {
            left->value = CInt64_GetULong(&rightval);
        } else {
            IllegalObjectOperator(left->xC->name, NULL, token);
        }
    } else if (right->xC) {
        if (right->label)
            PPCError_Error(124, right->xC->name->name, right->label->name->name);

        if (token == '+') {
            left->xC = right->xC;
            left->x10 = right->x10;
            left->value = CInt64_GetULong(&rightval);
        } else {
            IllegalObjectOperator(NULL, right->xC->name, token);
        }
    } else if (left->label) {
        if (left->xC)
            PPCError_Error(124, left->label->name->name, left->xC->name->name);

        if (right->label) {
            if (left->x18) {
                PPCError_Error(121, left->label->name->name, left->x18->name->name, right->label->name->name);
            } else if (right->x18) {
                PPCError_Error(121, left->label->name->name, right->label->name->name, right->x18->name->name);
            } else if (token == '-') {
                left->value = CInt64_GetULong(&rightval);
                left->x18 = right->label;
            } else {
                IllegalObjectOperator(left->label->name, right->label->name, token);
            }
        } else if (token == '+' || token == '-') {
            left->value = CInt64_GetULong(&rightval);
        } else {
            IllegalObjectOperator(NULL, left->label->name, token);
        }
    } else if (right->label) {
        if (token == '+') {
            left->label = right->label;
            left->x18 = right->x18;
            left->value = CInt64_GetULong(&rightval);
        } else {
            IllegalObjectOperator(NULL, right->label->name, token);
        }
    } else {
        left->value = CInt64_GetULong(&rightval);
    }

    left->flags |= right->flags;
    if (left->type == IAOpnd_Lab) {
        if (right->type != IAOpnd_Lab)
            left->type = right->type;
    } else {
        if (right->type != IAOpnd_Lab && right->type != left->type)
            PPCError_Error(126);
    }
}

static void ExpressionTailPPC(IAExpr *left, SInt32 value) {
    IAExpr right;
    short left_tk;
    short right_prec;

    while (1) {
        left_tk = tk;
        tk = lex();

        PrimaryExpressionPPC(&right, value);
        right_prec = GetPrec(tk);
        if (right_prec == 0) {
            DiadicOperatorPPC(left, left_tk, &right);
            break;
        }

        if (GetPrec(left_tk) >= right_prec) {
            DiadicOperatorPPC(left, left_tk, &right);
        } else {
            ExpressionTailPPC(&right, value);
            DiadicOperatorPPC(left, left_tk, &right);
            if (GetPrec(tk) == 0)
                break;
        }
    }
}

static void immediateoperand(IAOperand *op, SInt32 minval, SInt32 maxval) {
    SInt32 value;
    if (InlineAsm_gccmode && tk == '%') {
        tk = lex();
        if (tk != TK_INTCONST) {
            CError_Error(CErrorStr144);
        } else {
            CInt64 c = tkintconst;
            value = CInt64_GetULong(&c);
            if (value < 0)
                CError_Error(CErrorStr144);
        }
        op->type = IAOpnd_7;
        op->u.unk7.value = value;
        op->u.unk7.unk1 = 1;
        op->u.unk7.unk2 = 0;
        op->u.unk7.unk3 = 0;
        tk = lex();
    } else {
        value = InlineAsm_ConstantExpressionPPC(0);
        if (value < minval || value > maxval)
            CError_Error(CErrorStr154);
        op->type = IAOpnd_Imm;
        op->u.imm.value = value;
    }
}

static SInt32 immediatevalue(IAOperand *op, SInt32 minval, SInt32 maxval) {
    SInt32 value;
    if (InlineAsm_gccmode && tk == '%') {
        CError_Error(CErrorStr144);
        return 0;
    } else {
        value = InlineAsm_ConstantExpressionPPC(0);
        if (value < minval || value > maxval)
            CError_Error(CErrorStr154);
        op->type = IAOpnd_Imm;
        op->u.imm.value = value;
        return value;
    }
}

static void InlineAsm_ExpressionPPC(IAExpr *expr, SInt32 value) {
    PrimaryExpressionPPC(expr, value);
    if (GetPrec(tk))
        ExpressionTailPPC(expr, value);
    if (GetPrec(tk))
        ExpressionTailPPC(expr, value);

    if (expr->type == IAExpr_5 && tk == TK_IDENTIFIER) {
        if (!strcmp(tkidentifier->name, "@l")) {
            expr->type = IAExpr_6;
            tk = lex();
        } else if (!strcmp(tkidentifier->name, "@ha")) {
            expr->type = IAExpr_8;
            tk = lex();
        } else if (!strcmp(tkidentifier->name, "@h")) {
            expr->type = IAExpr_7;
            tk = lex();
        }
    }
}

static SInt32 InlineAsm_ConstantExpressionPPC(SInt32 value) {
    IAExpr expr;

    InlineAsm_ExpressionPPC(&expr, value);
    if (!InlineAsm_CheckExpr(&expr)) {
        IllegalObjectInConst(&expr);
        return 0;
    } else {
        return InlineAsm_GetExprValue(&expr);
    }
}

static SInt32 crbitoperand(void) {
    SInt32 value = InlineAsm_ConstantExpressionPPC(1);
    if (value < 0 || value > 31)
        CError_Error(CErrorStr154);
    return value;
}

static void floatoperand(IAOperand *op, InlineAsm *ia, Type *type) {
    Object *obj;

    obj = createfloatconstant(type, &tkfloatconst);
    op[0].type = IAOpnd_Reg;
    op[0].u.reg.rclass = RegClass_GPR;
    op[0].u.reg.object = NULL;
    op[0].u.reg.effect = EffectRead;
    op[0].u.reg.num = pic_base_reg;

    ia->argcount++;
    op[1].type = IAOpnd_4;
    op[1].u.obj.obj = obj;
    PPCError_Error(179);
    op[1].u.obj.unk = IAExpr_2;
    op[1].u.obj.offset = 0;
    tk = lex();
}

static Object *isvariableoperand(void) {
    IALookupResult result;
    Object *obj;

    if (tk == TK_IDENTIFIER) {
        InlineAsm_LookupSymbol(tkidentifier, &result);
        if ((obj = result.object)) {
            if (obj->datatype == DLOCAL) {
                if (OBJECT_REG(obj))
                    return NULL;
                return obj;
            }

            if (obj->datatype == DFUNC || obj->datatype == DVFUNC)
                return obj;

            if (obj->datatype == DDATA) {
                createIndirect(obj, 0, 0);
                return obj;
            }
        }
    }

    return NULL;
}

static Object *isregisterstructpointeroperand(void) {
    IALookupResult result;
    Object *obj;

    if (tk != TK_IDENTIFIER)
        return NULL;

    InlineAsm_LookupSymbol(tkidentifier, &result);
    if ((obj = result.object)) {
        if (obj->datatype != DLOCAL)
            return NULL;
        if (!OBJECT_REG(obj) && !is_register_object(obj))
            return NULL;
        if (!IS_TYPE_POINTER(obj->type))
            return NULL;
        if (!IS_TYPE_STRUCT(TPTR_TARGET(obj->type)) && !IS_TYPE_CLASS(TPTR_TARGET(obj->type)))
            return NULL;
        return obj;
    }

    return NULL;
}

static void memoryoperand(IAOperand *op, InlineAsm *ia, Boolean flag, short effect) {
    IAExpr expr;

    InlineAsm_ExpressionPPC(&expr, 0);
    if (expr.object) {
        if (!flag)
            CError_Error(CErrorStr155);
        if (expr.xC)
            PPCError_Error(122, expr.xC);

        op[0].type = IAOpnd_Reg;
        op[0].u.reg.rclass = RegClass_GPR;
        op[0].u.reg.object = expr.object;
        op[0].u.reg.num = 0;
        op[0].u.reg.effect = effect;
        if (expr.object || expr.reg)
            op[0].u.reg.effect = effect;
        else
            op[0].u.reg.effect = 0;

        ia->argcount++;
        op[1].type = IAOpnd_Imm;
        switch (expr.type) {
            case IAExpr_5:
                expr.type = IAExpr_6;
                if (expr.object->datatype != DLOCAL || !OBJECT_REG(expr.object))
                    PPCError_Error(180);
            case IAExpr_2:
            case IAExpr_6:
            case IAExpr_7:
            case IAExpr_8:
                op[1].u.imm.value = InlineAsm_GetExprValue(&expr);
                break;
            default:
                CError_Error(CErrorStr155);
        }

        expr.object->flags |= OBJECT_FLAGS_UNUSED;
        return;
    }

    if (expr.xC) {
        if (expr.x10)
            PPCError_Error(123, expr.xC->name->name, expr.x10->name->name);

        if (flag) {
            if (tk == '(') {
                if (flag) {
                    tk = lex();
                    registeroperand(op, RegClass_GPR, effect);
                    if ((expr.type == IAExpr_8 || expr.type == IAExpr_7) && copts.codegen_pic && pic_base_reg)
                        CError_Error(CErrorStr155);
                    if (tk != ')')
                        CError_Error(CErrorStr115);
                    tk = lex();
                }
            } else {
                op[0].type = IAOpnd_Reg;
                op[0].u.reg.rclass = RegClass_GPR;
                op[0].u.reg.object = expr.object;
                op[0].u.reg.num = expr.reg;
            }

            if (expr.object || expr.reg)
                op[0].u.reg.effect = effect;
            else
                op[0].u.reg.effect = 0;

            ia->argcount++;
            op++;
        }

        if (expr.xC->datatype == DLOCAL) {
            op[0].type = IAOpnd_4;
            op[0].u.obj.unk = IAExpr_1;
        } else {
            op[0].type = IAOpnd_3;
            if (expr.type == IAExpr_5) {
                expr.type = IAExpr_6;
                PPCError_Error(180);
            }
            op[0].u.obj.unk = expr.type;
        }

        op[0].u.obj.obj = expr.xC;
        op[0].u.obj.offset = expr.value;
        expr.xC->flags |= OBJECT_FLAGS_UNUSED;
        return;
    }

    if (flag) {
        if (tk == '(') {
            tk = lex();
            registeroperand(op, RegClass_GPR, effect);
            ia->argcount++;
            op++;
            if (tk != ')')
                CError_Error(CErrorStr115);
            tk = lex();
        } else {
            op->type = IAOpnd_Reg;
            op->u.reg.rclass = RegClass_GPR;
            op->u.reg.object = expr.object;
            op->u.reg.num = expr.reg;
            ia->argcount++;
            op++;
        }
    }

    if (expr.label) {
        if (expr.x18) {
            op->type = IAOpnd_LabDiff;
            op->negated = 0;
            op->u.labdiff.label1 = expr.label;
            op->u.labdiff.label2 = expr.x18;
            op->u.labdiff.offset = expr.value;
        } else {
            PPCError_Error(125, expr.label->name->name);
        }
    } else {
        op->type = IAOpnd_Imm;
        op->u.imm.value = InlineAsm_GetExprValue(&expr);
    }
}

static void registeroperand(IAOperand *op, char rclass, short effect) {
    IARegister *reg;
    Object *obj;

    if (tk == TK_IDENTIFIER && (reg = InlineAsm_LookupRegisterPPCName(tkidentifier)) && reg->rclass == rclass) {
        SInt32 num;
        obj = reg->object;
        num = reg->num;
        op->type = IAOpnd_Reg;
        op->u.reg.rclass = rclass;
        op->u.reg.object = obj;
        op->u.reg.num = num;
        op->u.reg.effect = effect;
        if (obj) {
            reg->object->flags |= OBJECT_FLAGS_UNUSED;
            Registers_GetVarInfo(obj)->flags |= VarInfoFlag40;
        }
    } else if (rclass == RegClass_CRFIELD) {
        op->type = IAOpnd_Reg;
        op->u.reg.rclass = RegClass_CRFIELD;
        op->u.reg.object = NULL;
        op->u.reg.num = getimmediateoperand(0, 7);
        op->u.reg.effect = effect;
        return;
    } else if (rclass == RegClass_SPR) {
        op->type = IAOpnd_Reg;
        op->u.reg.rclass = RegClass_SPR;
        op->u.reg.object = NULL;
        op->u.reg.num = getimmediateoperand(0, 1024);
        op->u.reg.effect = effect;
        return;
    } else if (tk == '%' && InlineAsm_gccmode) {
        SInt32 num;
        tk = lex();
        if (tk != TK_INTCONST) {
            CError_Error(CErrorStr144);
        } else {
            num = ExtractValue(tkintconst);
            if (num < 0)
                CError_Error(CErrorStr144);
        }

        op->type = IAOpnd_6;
        op->u.unk6.num = num;
        op->u.unk6.unk4 = 2;
        op->u.unk6.effect = effect;
        op->u.unk6.rclass = rclass;
        tk = lex();
        return;
    } else if (tk == TK_IDENTIFIER) {
        NotInRegisterError(tkidentifier->name, rclass);
    } else {
        PPCError_Error(171);
    }

    tk = lex();
    if (!strcmp(tkidentifier->name, "@loword")) {
        tk = lex();
    } else if (!strcmp(tkidentifier->name, "@hiword")) {
        if (reg->object)
            op->u.reg.num = 1;
        else
            PPCError_Error(168);
        tk = lex();
    } else if (rclass == RegClass_GPR) {
        if (reg->object && reg->object->type->size == 8) {
            HashNameNode *name = reg->object->name;
            PPCError_Error(127, name->name, name->name, name->name);
        }
    }
}

static void cr0_operand(IAOperand *op, short effect) {
    IARegister *reg;

    if ((reg = InlineAsm_LookupRegisterPPC("cr0"))) {
        op->type = IAOpnd_Reg;
        op->u.reg.rclass = RegClass_CRFIELD;
        op->u.reg.object = reg->object;
        op->u.reg.num = reg->num;
        op->u.reg.effect = effect;
    } else {
        NotInRegisterError("cr0", RegClass_CRFIELD);
    }
}

static void r0_operand(IAOperand *op) {
    IARegister *reg;

    if ((reg = InlineAsm_LookupRegisterPPC("r0"))) {
        op->type = IAOpnd_Reg;
        op->u.reg.rclass = RegClass_GPR;
        op->u.reg.object = reg->object;
        op->u.reg.num = reg->num;
        op->u.reg.effect = 0;
        tk = lex();
    } else {
        NotInRegisterError("r0", RegClass_GPR);
    }
}

static void labeloperand(InlineAsm *ia, IAOperand *op, Boolean flag1, Boolean flag2, Boolean flag3) {
    IALookupResult result;

    if (tk == TK_IDENTIFIER) {
        if (!InlineAsm_LookupSymbol(tkidentifier, &result))
            result.label = InlineAsm_DeclareLabel(tkidentifier);

        if (result.label) {
            op->type = IAOpnd_Lab;
            op->u.lab.label = result.label;
        } else if (result.object && result.object->datatype == DFUNC) {
            if (flag3)
                ia->flags |= IAFlag2;
            op->type = IAOpnd_3;
            op->u.obj.obj = result.object;
            op->u.obj.offset = 0;

            if (flag1) {
                op->u.obj.unk = IAExpr_4;
                if (flag2)
                    CError_Error(CErrorStr261);
            } else {
                op->u.obj.unk = IAExpr_2;
                if (flag2)
                    op->u.obj.unk = IAExpr_10;
                op->u.obj.unk = IAExpr_6;
                PPCError_Error(180);
            }
        } else {
            CError_Error(CErrorStr144);
        }

        tk = lex();
    } else if (tk == '*') {
        if (!flag2) {
            tk = lex();
            if (tk == '+') {
                tk = lex();
                if (flag1)
                    immediateoperand(op, -0x2000000, 0x1FFFFFF);
                else
                    immediateoperand(op, -0x8000, 0xFFFF);
            } else if (tk == '-') {
                tk = lex();
                op->u.imm.value = flag1 ? -immediatevalue(op, -0x1FFFFFF, 0x2000000) : -immediatevalue(op, -0x7FFF, 0x10000);
            } else {
                CError_Error(CErrorStr144);
            }
        } else {
            CError_Error(CErrorStr144);
        }
    } else {
        if (flag2) {
            if (flag1)
                immediateoperand(op, -0x2000000, 0x1FFFFFF);
            else
                immediateoperand(op, -0x8000, 0xFFFF);
        } else {
            CError_Error(CErrorStr144);
        }
    }
}

static void imm_or_labeldiff_operand(InlineAsm *ia, IAOperand *op, SInt32 minimum, SInt32 maximum, Boolean negate) {
    IAExpr expr;
    Object *obj;
    SInt32 value;

    InlineAsm_ExpressionPPC(&expr, 0);

    if ((obj = expr.xC) && !expr.x10 && expr.type == IAExpr_5 && obj->datatype == DDATA && IS_TYPE_INT_OR_ENUM(obj->type) && (obj->qual & Q_10000)) {
        switch (ia->opcode) {
            case PC_ADDI:
            case PC_ADDIC:
            case PC_ADDICR:
            case PC_ADDIS:
            case PC_ORI:
            case PC_ORIS:
                if (ia->args[1].u.imm.value) {
                    SInt32 cmp;
                    if (obj->datatype != DLOCAL) {
                        cmp = copts.codegen_pic ? INVALID_PIC_REG : NO_REG;
                    } else {
                        cmp = local_base_register(obj);
                    }
                    if (ia->args[1].u.imm.value == cmp)
                        break;
                }
            case PC_LI:
            case PC_LIS:
            case PC_TWI:
            case PC_OPWORD:
                InlineAsm_InitExpr5(&expr, expr.value + CInt64_GetULong(&obj->u.data.u.intconst));
                break;
        }
    }

    if (expr.label) {
        if (expr.x18) {
            op->type = IAOpnd_LabDiff;
            if (negate)
                op->negated = 1;
            else
                op->negated = 0;
            op->u.labdiff.label1 = expr.label;
            op->u.labdiff.label2 = expr.x18;
            op->u.labdiff.offset = expr.value;
        } else {
            PPCError_Error(125, expr.label->name->name);
        }
        return;
    }

    if (expr.xC) {
        if (!expr.x10) {
            if (ia->opcode != PC_OPWORD && expr.type == IAExpr_5) {
                IllegalObjectInConst(&expr);
                return;
            }

            if (expr.xC->datatype == DLOCAL) {
                op->type = IAOpnd_4;
                op->u.obj.unk = IAExpr_1;
            } else {
                op->type = IAOpnd_3;
                if (expr.type == IAExpr_5) {
                    expr.type = IAExpr_6;
                    PPCError_Error(180);
                }
                op->u.obj.unk = expr.type;
            }
            op->u.obj.obj = expr.xC;
            op->u.obj.offset = expr.value;
        } else {
            PPCError_Error(123, expr.xC->name->name, expr.x10->name->name);
        }
        return;
    }

    value = InlineAsm_GetExprValue(&expr);
    if (value < minimum || value > maximum)
        CError_Error(CErrorStr154);

    op->type = IAOpnd_Imm;
    if (negate)
        op->u.imm.value = -value;
    else
        op->u.imm.value = value;
}

static void eatcommatoken(void) {
    if (tk == ',')
        tk = lex();
    else
        CError_Error(CErrorStr116);
}

static InlineAsm *InlineAsm_ScanAssemblyOperands(IAMnemonic *mnemonic) {
    OpcodeInfo *info;
    InlineAsm *ia;
    SInt32 buffersize;
    IAOperand *op;
    int argcount;
    char *format;
    IARegister *reg;

    char code;
    short effect;
    Boolean has_excl;
    Boolean has_question;
    Boolean negate;
    UInt32 t;

    info = &opcodeinfo[mnemonic->x4];
    argcount = info->x8;
    if (PCODE_FLAG_SET_F(info) & fPCodeFlag8000000)
        argcount++;
    if (!(PCODE_FLAG_SET_F(info) & fPCodeFlag10000000) && (PCODE_FLAG_SET_F(info) & fPCodeFlag4000000))
        argcount++;
    if (PCODE_FLAG_SET_T(info) & fPCodeFlag2000000)
        argcount++;

    buffersize = sizeof(InlineAsm) + sizeof(IAOperand) * argcount;
    ia = galloc(buffersize);
    memset(ia, 0, buffersize);

    ia->opcode = mnemonic->x4;
    ia->flags = 0;
    ia->argcount = 0;

    op = ia->args;
    for (format = mnemonic->format; *format; format++) {
        CError_ASSERT(1664, ia->argcount < argcount);

        if (*format == ',') {
            eatcommatoken();
            format++;
        } else if (*format == ';') {
            format++;
        }

        if (*format == '[' || *format == '(')
            format++;

        effect = EffectRead;
        has_excl = 0;
        has_question = 0;
        negate = 0;
        if (*format == '=') {
            effect = EffectWrite;
            format++;
        } else if (*format == '+') {
            effect = EffectRead | EffectWrite;
            format++;
        }

        if (*format == '-') {
            negate = 1;
            format++;
        }

        if (*format == '?') {
            has_question = 1;
            format++;
        }

        if (*format == '!') {
            has_excl = 1;
            format++;
        }

        switch (*format) {
            case 'p':
                continue;
            case '&':
                if (format[1] == '2') {
                    op[0] = op[-2];
                    format++;
                    if (op->type == IAOpnd_Reg)
                        op->u.reg.effect = effect;
                    ia->argcount++;

                    op[1] = op[-1];
                    op++;
                    if (op->type == IAOpnd_Reg)
                        op->u.reg.effect = effect;
                } else {
                    op[0] = op[-1];
                    if (op->type == IAOpnd_Reg)
                        op->u.reg.effect = effect;
                }
                break;

            case '%': {
                SInt32 value;
                format += pcode_const_from_format(format + 1, &value);
                op->type = IAOpnd_Imm;
                op->u.imm.value = value;
                break;
            }

            case 'b':
                if (!isregisteroperand(RegClass_GPR)) {
                    if (tk == TK_INTCONST && tkintconst.lo == 0)
                        r0_operand(op);
                } else {
                    registeroperand(op, RegClass_GPR, effect);
                    if (op->u.reg.object == NULL && op->u.reg.num == 0)
                        op->u.reg.effect = 0;
                }
                break;

            case 'r':
                registeroperand(op, RegClass_GPR, effect);
                break;

            case 'B':
            case 'a':
            case 'i':
            case 't':
            case 'u':
            case 'x':
            {
                SInt32 value, hi, lo;
                code = *format;
                value = 16;
                if (code == 'a') {
                    if (isdigit(format[1]))
                        code = *(++format);
                    else
                        CError_FATAL(1804);
                }

                if (isdigit(format[1])) {
                    format += pcode_const_from_format(format + 1, &value);
                } else if (code == 't' || code == 'B') {
                    code = 'u';
                    value = 5;
                }

                pcode_get_hi_lo(value, code, &hi, &lo);
                if (!has_question || tk == ',') {
                    if (has_question)
                        tk = lex();
                    if (has_excl)
                        getimmediateoperand(lo, hi);
                    else
                        immediateoperand(op, lo, hi);
                } else {
                    op->type = IAOpnd_Imm;
                    op->u.imm.value = 0;
                }

                if (code == 'i' && value == 16)
                    op->u.imm.value = (short) op->u.imm.value;
                if (negate)
                    op->u.imm.value = -op->u.imm.value;

                if (pcode_check_imm_bits(op->u.imm.value, value, code))
                    CError_FATAL(1838);

                break;
            }

            case 'O':
                if (tk == TK_INTCONST && tkintconst.lo == 0) {
                    getimmediateoperand(0, 0);
                    eatcommatoken();
                }
                continue;

            case 'f':
                registeroperand(op, RegClass_FPR, effect);
                break;

            case 'v':
                registeroperand(op, RegClass_VR, effect);
                break;

            case 'T':
                if (!has_question || tk == ',') {
                    if (has_question)
                        tk = lex();

                    immediateoperand(op, 268, 269);
                    if (op->u.reg.num == 268)
                        op->u.reg.num = 284;
                    else
                        op->u.reg.num = 285;
                } else {
                    op->u.reg.num = 284;
                }

                op->type = IAOpnd_Reg;
                op->u.reg.rclass = RegClass_SPR;
                op->u.reg.effect = effect;
                break;

            case 'S':
            {
                SInt32 value;
                format += pcode_const_from_format(format + 1, &value);
                op->type = IAOpnd_Reg;
                op->u.reg.rclass = RegClass_SPR;
                op->u.reg.num = value;
                op->u.reg.effect = effect;
                break;
            }

            case 'c':
                if (has_question) {
                    if (isregisteroperand(RegClass_CRFIELD) || tk == TK_INTCONST) {
                        registeroperand(op, RegClass_CRFIELD, effect);
                    } else {
                        cr0_operand(op, effect);
                        if (format[1] == ',')
                            format++;
                    }
                } else {
                    registeroperand(op, RegClass_CRFIELD, effect);
                }
                break;

            case 'l':
                switch (ia->opcode) {
                    case PC_B:
                    case PC_BL:
                        labeloperand(ia, op, 1, mnemonic->x10 & 2, mnemonic->x10 & 1);
                        break;
                    default:
                        labeloperand(ia, op, 0, mnemonic->x10 & 2, mnemonic->x10 & 1);
                        break;
                }
                break;

            case 'w':
                imm_or_labeldiff_operand(ia, op, -0x80000000, 0x7FFFFFFF, negate);
                break;

            case 'M':
            case 'm':
            case 'n':
                imm_or_labeldiff_operand(ia, op, -0x8000, 0xFFFF, negate);
                break;

            case 'Q':
            {
                SInt32 cr = crbitoperand();
                op->type = IAOpnd_Reg;
                op->u.reg.num = cr >> 2;
                op->u.reg.rclass = RegClass_CRFIELD;
                op->u.reg.effect = effect;

                ia->argcount++;
                op[1].type = IAOpnd_Imm;
                op[1].u.imm.value = cr % 4;
                op++;
                break;
            }

            case 'd': {
                short effect2;
                CError_ASSERT(1971, format[1] == '(');
                format++;
                effect2 = EffectRead;
                if (format[1] == '=') {
                    effect2 = EffectWrite;
                    format++;
                } else if (format[1] == '+') {
                    effect2 = EffectRead | EffectWrite;
                    format++;
                }

                CError_ASSERT(1983, format[1] == 'b');
                CError_ASSERT(1985, format[2] == ')');
                format += 2;

                switch (ia->opcode) {
                    case PC_LFS:
                        if (tk == TK_FLOATCONST)
                            floatoperand(op, ia, TYPE(&stfloat));
                        else
                            memoryoperand(op, ia, 1, effect2);
                        break;
                    case PC_LFD:
                        if (tk == TK_FLOATCONST)
                            floatoperand(op, ia, TYPE(&stdouble));
                        else
                            memoryoperand(op, ia, 1, effect2);
                        break;
                    default:
                        memoryoperand(op, ia, 1, effect2);
                }

                break;
            }

            case 'N':
                immediateoperand(op, 1, 32);
                break;

            case 's':
                registeroperand(op, RegClass_SPR, effect);
                break;

            case 'D':
                if (tk == TK_IDENTIFIER && (reg = InlineAsm_LookupDCRRegister(tkidentifier->name))) {
                    op->type = IAOpnd_Imm;
                    op->u.imm.value = reg->num;
                } else {
                    immediateoperand(op, 0, 1023);
                }
                break;

            case 'Y':
            {
                SInt32 mask = 255;
                SInt32 i;
                if (ia->opcode == PC_MTCRF) {
                    if (ia->args[0].type != IAOpnd_Imm)
                        CError_Error(CErrorStr144);
                    mask = ia->args[0].u.imm.value;
                }
                for (i = 0; i < 8; i++) {
                    if ((0x80 >> i) & mask) {
                        op->type = IAOpnd_Reg;
                        op->u.reg.num = i;
                        op->u.reg.rclass = RegClass_CRFIELD;
                        op->u.reg.effect = effect;
                        ia->argcount++;
                        op++;
                    }
                }
                ia->argcount--;
                op--;
                break;
            }

            case 'P':
                op->type = IAOpnd_Reg;
                op->u.reg.rclass = RegClass_SPR;
                op->u.reg.object = NULL;
                if (format[1] == '3') {
                    format++;
                    op->u.reg.num = getimmediateoperand(0, 7);
                } else {
                    op->u.reg.num = getimmediateoperand(0, 3);
                }
                op->u.reg.effect = effect;
                break;

            case 'C':
                op->type = IAOpnd_Reg;
                op->u.reg.rclass = RegClass_SPR;
                op->u.reg.object = NULL;
                op->u.reg.num = 9;
                op->u.reg.effect = effect;
                break;

            case 'L':
                op->type = IAOpnd_Reg;
                op->u.reg.rclass = RegClass_SPR;
                op->u.reg.object = NULL;
                op->u.reg.num = 8;
                op->u.reg.effect = effect;
                break;

            case 'X':
                op->type = IAOpnd_Reg;
                op->u.reg.rclass = RegClass_SPR;
                op->u.reg.object = NULL;
                op->u.reg.num = 1;
                op->u.reg.effect = effect;
                break;

            case 'Z':
                op->type = IAOpnd_Reg;
                op->u.reg.rclass = RegClass_CRFIELD;
                op->u.reg.object = NULL;
                t = info->flags & 0xC0000000;
                if (t == 0x40000000) {
                    op->u.reg.num = 1;
                } else if (t == 0xC0000000) {
                    op->u.reg.num = 6;
                } else {
                    op->u.reg.num = 0;
                }
                op->u.reg.effect = effect;
                break;

            default:
                CError_FATAL(2266);
        }

        while (format[1] && strchr("/<>|*", format[1])) {
            int index;
            SInt32 value;
            SInt32 value2;
            IAOperand tmp;
            switch ((code = *(++format))) {
                case '/':
                    index = -1;
                    if (format[1] == '2') {
                        index = -2;
                        format++;
                    }

                    tmp = op[index];
                    op[index] = op[0];
                    op[0] = tmp;
                    break;
                case '*':
                case '<':
                case '>':
                case '|':
                    if (op->type == IAOpnd_Imm)
                        value = op->u.imm.value;
                    else if (op->type == IAOpnd_Reg)
                        value = op->u.reg.num;
                    else
                        CError_FATAL(2312);

                    if (format[1] == 'p') {
                        format++;
                        if (op[-1].type == IAOpnd_Imm)
                            value2 = op[-1].u.imm.value;
                        else if (op[-1].type == IAOpnd_Reg)
                            value2 = op[-1].u.reg.num;
                        else
                            CError_FATAL(2322);
                    } else if (isdigit(format[1])) {
                        format += pcode_const_from_format(format + 1, &value2);
                    } else {
                        CError_FATAL(2327);
                    }

                    switch (code) {
                        case '<':
                            value = value2 - value;
                            break;
                        case '>':
                            value = value - value2;
                            break;
                        case '|':
                            value = value + value2;
                            break;
                        case '*':
                            value = value * value2;
                            break;
                        default:
                            CError_FATAL(2348);
                    }

                    if (op->type == IAOpnd_Imm)
                        op->u.imm.value = value;
                    else if (op->type == IAOpnd_Reg)
                        op->u.reg.num = value;
                    else
                        CError_FATAL(2355);
                    break;
            }
        }

        ia->argcount++;
        op++;
        if (format[1] == ']' || format[1] == ')')
            format++;
    }

    return ia;
}

static int mnemonic_has_overflow(char *buf) {
    int result = 0;

    if (buf[strlen(buf) - 1] == 'o') {
        if (!strcmp(buf, "bso"))
            return 0;
        if (!strcmp(buf, "fcmpo"))
            return 0;
        if (!strcmp(buf, "eieio"))
            return 0;
        if (!strcmp(buf, "vslo"))
            return 0;
        if (!strcmp(buf, "vsro"))
            return 0;
        result = 1;
    }

    return result;
}

static int mnemonic_has_absolute(char *buf) {
    int result = 0;
    char last = buf[strlen(buf) - 1];

    if (buf[0] == 'b' && last == 'a')
        result = 1;

    return result;
}

static int mnemonic_has_linkregister(char *buf) {
    int result = 0;
    char last = buf[strlen(buf) - 1];

    if (buf[0] == 'b' && last == 'l')
        result = 1;

    return result;
}

static int mnemonic_has_record(char *buf) {
    int result = 0;

    if (lookahead() == '.') {
        tk = lex();
        result = 1;
        strcat(buf, ".");
    }

    return result;
}

static void installregistervariables(void) {
}

void InlineAsm_InitializePPC(void) {
    Test_Version_Numbers();
    allow_array_expressions = 1;
    supports_hardware_fpu = 1;
    assembledinstructions = 0;

    switch (copts.cpu) {
        case CPU_PPC401: cpu = CPUMask_401; break;
        case CPU_PPC403: cpu = CPUMask_403; break;
        case CPU_PPC505: cpu = CPUMask_50x; break;
        case CPU_PPC509: cpu = CPUMask_50x; break;
        case CPU_PPC555: cpu = CPUMask_55x_56x; break;
        case CPU_PPC556: cpu = CPUMask_55x_56x; break;
        case CPU_PPC565: cpu = CPUMask_55x_56x; break;
        case CPU_PPC601: cpu = CPUMask_601; break;
        case CPU_PPC602: cpu = CPUMask_602; break;
        case CPU_PPC8240: cpu = CPUMask_8240; break;
        case CPU_PPC8260: cpu = CPUMask_8260; break;
        case CPU_PPC603: cpu = CPUMask_603; break;
        case CPU_PPC603e: cpu = CPUMask_603; break;
        case CPU_PPC604: cpu = CPUMask_604; break;
        case CPU_PPC604e: cpu = CPUMask_604; break;
        case CPU_PPC740: cpu = CPUMask_740_750; break;
        case CPU_PPC750: cpu = CPUMask_740_750; break;
        case CPU_PPC801: cpu = CPUMask_801_821_860; break;
        case CPU_PPC821: cpu = CPUMask_801_821_860; break;
        case CPU_PPC823: cpu = CPUMask_823_850; break;
        case CPU_PPC850: cpu = CPUMask_823_850; break;
        case CPU_PPC860: cpu = CPUMask_801_821_860; break;
        case CPU_PPC7400: case CPU_PPC7450: cpu = CPUMask_74xx; break;
        case CPU_Generic: cpu = CPUMask_Generic; break;
        default:
            CError_FATAL(2613);
    }

    if (copts.altivec_model)
        cpu |= 0x40000000;
}

void InlineAsm_Initialize(UInt8 assemblertype) {
    assembler_type = assemblertype;

    if (assembler_type == 0) {
        InlineAsm_InitializePPC();
        pic_base_reg = INVALID_PIC_REG;
    } else {
        pic_base_reg = 0;
        pic_base_label = NULL;
    }

    InlineAsm_InitializeMnemonicsPPC();
    InlineAsm_InitializeRegisters();
    InlineAsm_InitializeRegistersPPC();

    if (assembler_type == 0) {
        installregistervariables();
    } else {
        process_arguments(setup_assembly_argument, 0);
        assign_local_addresses();
    }
}

static IAEntryPoint *InlineAsm_CreateEntryPoint(HashNameNode *name, Boolean flag) {
    Object *obj;
    IAEntryPoint *ep;
    IALookupResult result;

    if (InlineAsm_LookupSymbol(name, &result) && (obj = result.object)) {
        if (!(obj->datatype == DFUNC && !(obj->flags & OBJECT_FLAGS_4)))
            CError_Error(CErrorStr122, name->name);

        obj->flags |= OBJECT_FLAGS_4;
        obj->sclass = flag ? TK_STATIC : TK_EXTERN;

        ep = lalloc(sizeof(IAEntryPoint));
        memclrw(ep, sizeof(IAEntryPoint));
        ep->x0 = IADirective_Entry;
        ep->x2 = 1;
        ep->x8 = obj;
        ep->size = assembledinstructions * 4;
    } else {
        CError_Error(CErrorStr140, name->name);
    }

    return ep;
}

static InlineAsm *InlineAsm_CreateFrFree(void) {
    InlineAsm *ia = lalloc(sizeof(InlineAsm));
    memclrw(ia, sizeof(InlineAsm));
    ia->opcode = IADirective_FrFree;
    ia->flags = IAFlag1;
    return ia;
}

SInt32 InlineAsm_IsDirective(UInt8 assemblertype) {
    char *name;
    SInt32 directive = IADirective_Null;

    if (tk == '.')
        tk = lex();

    if (tk == TK_IDENTIFIER) {
        name = tkidentifier->name;
        if (!strcmp(name, "machine")) {
            directive = IADirective_Machine;
        } else if (assemblertype == 1) {
            if (!strcmp(name, "entry")) {
                directive = IADirective_Entry;
            } else if (!strcmp(name, "fralloc")) {
                directive = IADirective_FrAlloc;
            } else if (!strcmp(name, "nofralloc")) {
                directive = IADirective_NoFrAlloc;
            } else if (!strcmp(name, "frfree")) {
                directive = IADirective_FrFree;
            } else if (!strcmp(name, "smclass")) {
                directive = IADirective_SmClass;
            } else if (!strcmp(name, "picbase")) {
                directive = IADirective_PicBase;
            } else {
                directive = IADirective_Null;
            }
        }
    }

    return directive;
}

void InlineAsm_ProcessDirective(SInt32 directive) {
    Boolean flag;
    Statement *stmt;
    IAOperand op;

    switch (directive) {
        case IADirective_Entry:
            flag = 0;
            tk = lex();
            if (tk == TK_STATIC) {
                flag = 1;
                tk = lex();
            } else if (tk == TK_EXTERN) {
                tk = lex();
            }

            if (tk != TK_IDENTIFIER)
                CError_Error(CErrorStr107);

            stmt = CFunc_AppendStatement(ST_ASM);
            stmt->expr = NULL;
            stmt->expr = (ENode *) InlineAsm_CreateEntryPoint(tkidentifier, flag);
            stmt->sourceoffset = -1;
            tk = lex();
            break;

        case IADirective_FrAlloc:
            if (assembledinstructions)
                CError_Error(CErrorStr166);
            if (asm_alloc_flags[0])
                CError_Error(CErrorStr165);
            if (asm_alloc_flags[1] || asm_alloc_flags[2])
                CError_Error(CErrorStr166);

            tk = lex();
            if (tk != TK_NEG7 && tk != ';')
                fralloc_parameter_area_size = getimmediateoperand(0x20, 0x7FFE);

            requires_frame = 1;
            asm_alloc_flags[0] = 1;
            break;

        case IADirective_NoFrAlloc:
            if (asm_alloc_flags[0] || asm_alloc_flags[1])
                CError_Error(CErrorStr165);
            if (asm_alloc_flags[2])
                CError_Error(CErrorStr166);
            if (assembledinstructions)
                CError_Error(CErrorStr166);
            tk = lex();

            asm_alloc_flags[1] = 1;
            user_responsible_for_frame = 1;
            break;

        case IADirective_FrFree:
            if (asm_alloc_flags[1] || asm_alloc_flags[2])
                CError_Error(CErrorStr166);

            asm_alloc_flags[2] = 1;
            stmt = CFunc_AppendStatement(ST_ASM);
            stmt->expr = NULL;
            stmt->expr = (ENode *) InlineAsm_CreateFrFree();
            if (copts.isGeneratingDebugInfo)
                stmt->sourceoffset = CPrep_GetFileOffsetInfo(&cparser_fileoffset);
            else
                stmt->sourceoffset = -1;
            tk = lex();
            break;

        case IADirective_Machine:
            tk = lex();
            if (tk == TK_INTCONST) {
                switch (tkintconst.lo) {
                    case 401: cpu = CPUMask_401; break;
                    case 403: cpu = CPUMask_403; break;
                    case 505: cpu = CPUMask_50x; break;
                    case 509: cpu = CPUMask_50x; break;
                    case 555: cpu = CPUMask_55x_56x; break;
                    case 556: cpu = CPUMask_55x_56x; break;
                    case 565: cpu = CPUMask_55x_56x; break;
                    case 601: cpu = CPUMask_601; break;
                    case 602: cpu = CPUMask_602; break;
                    case 8240: cpu = CPUMask_8240; break;
                    case 8260: cpu = CPUMask_8260; break;
                    case 603: cpu = CPUMask_603; break;
                    case 604: cpu = CPUMask_604; break;
                    case 740: cpu = CPUMask_740_750; break;
                    case 750: cpu = CPUMask_740_750; break;
                    case 801: cpu = CPUMask_801_821_860; break;
                    case 821: cpu = CPUMask_801_821_860; break;
                    case 823: cpu = CPUMask_823_850; break;
                    case 850: cpu = CPUMask_823_850; break;
                    case 860: cpu = CPUMask_801_821_860; break;
                    case 7400: cpu = CPUMask_74xx; break;
                    default:
                        CError_Error(CErrorStr144);
                }
            } else if (tk == TK_IDENTIFIER) {
                if (!strcmp(tkidentifier->name, "all")) {
                    cpu = CPUMask_All;
                } else if (!strcmp(tkidentifier->name, "generic")) {
                    cpu = CPUMask_Generic;
                } else if (!strcmp(tkidentifier->name, "603e")) {
                    cpu = CPUMask_603;
                } else if (!strcmp(tkidentifier->name, "604e")) {
                    cpu = CPUMask_604;
                } else if (!strcmp(tkidentifier->name, "PPC603e")) {
                    cpu = CPUMask_603;
                } else if (!strcmp(tkidentifier->name, "PPC604e")) {
                    cpu = CPUMask_604;
                } else if (!strcmp(tkidentifier->name, "altivec")) {
                    cpu = CPUMask_74xx;
                } else {
                    CError_Error(CErrorStr144);
                }
            } else {
                CError_Error(CErrorStr144);
            }
            tk = lex();
            break;

        case IADirective_SmClass:
            tk = lex();
            if (tk == TK_IDENTIFIER) {
                if (!strcmp(tkidentifier->name, "PR"))
                    sm_section = SECT_TEXT;
                else
                    CError_Error(CErrorStr144);
            } else {
                CError_Error(CErrorStr144);
            }
            tk = lex();
            break;

        case IADirective_PicBase:
            tk = lex();
            registeroperand(&op, RegClass_GPR, EffectRead);

            if (!(op.type == IAOpnd_Reg && op.u.reg.object == NULL))
                CError_Error(CErrorStr144);

            tk = lex();
            if (tk == TK_IDENTIFIER) {
                savepicbase(op.u.reg.num, tkidentifier);
                tk = lex();
            } else {
                CError_Error(CErrorStr144);
            }
            break;

        default:
            CError_Error(CErrorStr261);
    }
}

void InlineAsm_ScanAssemblyDirective(void) {
    SInt32 directive;

    if ((directive = InlineAsm_IsDirective(assembler_type)) != IADirective_Null)
        InlineAsm_ProcessDirective(directive);
}

void InlineAsm_ScanAssemblyInstruction(void) {
    Statement *stmt;
    InlineAsm *ia;
    IAMnemonic *mnemonic;
    Boolean record_flag;
    Boolean flag3;
    Boolean flag4;
    Boolean flag5;
    Boolean flag1;
    Boolean flag2;
    SInt32 directive;
    char buf[20];

    flag1 = 0;
    flag2 = 0;
    if ((directive = InlineAsm_IsDirective(assembler_type)) != IADirective_Null) {
        InlineAsm_ProcessDirective(directive);
        return;
    }

    stmt = CFunc_AppendStatement(ST_ASM);
    stmt->expr = NULL;
    if (copts.isGeneratingDebugInfo)
        stmt->sourceoffset = CPrep_GetFileOffsetInfo(&cparser_fileoffset);
    else
        stmt->sourceoffset = -1;

    strncpy(buf, tkidentifier->name, sizeof(buf));
    record_flag = mnemonic_has_record(buf);
    mnemonic = InlineAsm_LookupMnemonicPPC(buf);
    if (!mnemonic)
        CError_Error(CErrorStr261);

    flag3 = (FLAG_SET_F(opcodeinfo[mnemonic->x4].flags) & fPCodeFlag4000000) && (mnemonic->x10 & 0x400);
    flag4 = (FLAG_SET_T(opcodeinfo[mnemonic->x4].flags) & fPCodeFlag20000000) && (mnemonic->x10 & 2);
    flag5 = (FLAG_SET_T(opcodeinfo[mnemonic->x4].flags) & fPCodeFlag2000000) && (mnemonic->x10 & 1);

    if ((cpu == CPUMask_Generic) && (cpu & CPUFLAG_LOW_MASK) != ((cpu & mnemonic->cpu) & CPUFLAG_LOW_MASK)) {
        CError_Error(CErrorStr152);
    } else if (((cpu & mnemonic->cpu) & CPUFLAG_LOW_MASK) == 0) {
        CError_Error(CErrorStr152);
    } else if ((mnemonic->cpu & CPUFLAG_10000000) && !(cpu & CPUFLAG_10000000)) {
        CError_Error(CErrorStr152);
    } else if ((mnemonic->cpu & CPUFLAG_8000000) && !(cpu & CPUFLAG_8000000)) {
        CError_Error(CErrorStr152);
    } else if ((mnemonic->cpu & CPUFLAG_2000000) && !(cpu & CPUFLAG_2000000)) {
        CError_Error(CErrorStr152);
    } else if ((mnemonic->cpu & CPUFLAG_4000000) && !(cpu & CPUFLAG_4000000)) {
        CError_Error(CErrorStr152);
    } else if ((mnemonic->cpu & CPUFLAG_1000000) && !(cpu & CPUFLAG_1000000)) {
        CError_Error(CErrorStr152);
    } else if ((mnemonic->cpu & CPUFLAG_40000000) && !(cpu & CPUFLAG_40000000)) {
        CError_Error(CErrorStr152);
    } else if ((mnemonic->cpu & CPUFLAG_20000000) && !(cpu & CPUFLAG_20000000)) {
        CError_Error(CErrorStr152);
    } else if ((mnemonic->cpu & CPUFLAG_800000) && !(cpu & CPUFLAG_800000)) {
        CError_Error(CErrorStr152);
    }

    tk = lex();
    if (tk == '+' || tk == '-') {
        if (
                ((OPCODE_PART_1(mnemonic->x10) == 16) && (OPCODE_PART_2(mnemonic->x10) != 20)) ||
                ((OPCODE_PART_1(mnemonic->x10) == 19) && (OPCODE_PART_3(mnemonic->x10) == 528) && (OPCODE_PART_2(mnemonic->x10) != 20)) ||
                ((OPCODE_PART_1(mnemonic->x10) == 19) && (OPCODE_PART_3(mnemonic->x10) == 16) && (OPCODE_PART_2(mnemonic->x10) != 20))
                ) {
            if (tk == '+')
                flag1 = 1;
            else if (tk == '-')
                flag2 = 1;
            tk = lex();
        } else {
            CError_Error(CErrorStr120);
        }
    }

    stmt->expr = (ENode *) InlineAsm_ScanAssemblyOperands(mnemonic);

    ia = (InlineAsm *) stmt->expr;
    if (record_flag)
        ia->flags2 |= IAFlagsB_1;
    if (flag3)
        ia->flags2 |= IAFlagsB_2;
    if (flag4)
        ia->flags2 |= IAFlagsB_4;
    if (flag5)
        ia->flags2 |= IAFlagsB_8;
    if (flag1)
        ia->flags2 |= IAFlagsB_10;
    if (flag2)
        ia->flags2 |= IAFlagsB_20;
    if (volatileasm)
        ia->flags2 |= IAFlagsB_40;

    ++assembledinstructions;
}

static PCode *InlineAsm_TranslateIRtoPCodePPC(InlineAsm *ia, int argcount, UInt8 assemblertype) {
    OpcodeInfo *info;
    PCode *pc;
    int index;
    int extra_args;
    int reg;
    int newargcount;
    SInt32 buffersize;
    IAOperand *src;
    PCodeArg *dest;

    info = &opcodeinfo[ia->opcode];
    index = 0;
    extra_args = 0;
    reg = 0;

    if ((PCODE_FLAG_SET_F(info) & fPCodeFlag8000000) && !(PCODE_FLAG_SET_F(info) & fPCodeFlag20000000))
        extra_args++;

    if (!(PCODE_FLAG_SET_F(info) & fPCodeFlag10000000) && (PCODE_FLAG_SET_F(info) & fPCodeFlag4000000))
        extra_args++;

    if (argcount < ia->argcount) {
        if ((argcount + extra_args) >= ia->argcount) {
            extra_args -= (ia->argcount - argcount);
            argcount = ia->argcount;
        } else {
            CError_FATAL(3317);
        }
    }

    if (ia->opcode == PC_B && ia->args[0].type == IAOpnd_Imm)
        ia->flags2 |= IAFlagsB_40;

    if (ia->opcode == PC_TWI || ia->opcode == PC_TW || ia->opcode == PC_TRAP || ia->opcode == PC_SC)
        ia->flags |= IAFlag2;

    if (ia->flags & IAFlag2) {
        newargcount = argcount + branch_count_volatiles();
        if (copts.exceptions && current_statement && assembler_type == 0)
            newargcount += countexceptionactionregisters(current_statement->dobjstack);

        buffersize = sizeof(PCode) + sizeof(PCodeArg) * (newargcount + extra_args);
        pc = lalloc(buffersize);
        memset(pc, 0, buffersize);
        pc->argCount = newargcount;
    } else if (ia->opcode == PC_STMW || ia->opcode == PC_LMW) {
        reg = ia->args[0].u.reg.object ? OBJECT_REG(ia->args[0].u.reg.object) : ia->args[0].u.reg.num;
        newargcount = argcount + (32 - reg);

        buffersize = sizeof(PCode) + sizeof(PCodeArg) * newargcount;
        pc = lalloc(buffersize);
        memset(pc, 0, buffersize);
        pc->argCount = newargcount;
    } else {
        buffersize = sizeof(PCode) + sizeof(PCodeArg) * (argcount + extra_args);
        pc = lalloc(buffersize);
        memset(pc, 0, buffersize);
        pc->argCount = (ia->argcount > argcount) ? ia->argcount : argcount;
    }

    pc->op = ia->opcode;
    pc->flags = info->flags;
    pc->sourceoffset = current_statement ? current_statement->sourceoffset : -1;

    dest = pc->args;
    src = ia->args;
    argcount += extra_args;
    while (index < argcount) {
        if (index >= ia->argcount) {
            dest->kind = PCOp_PLACEHOLDEROPERAND;
        } else {
            switch (src->type) {
                case IAOpnd_0:
                    dest->kind = PCOp_PLACEHOLDEROPERAND;
                    break;

                case IAOpnd_Imm:
                    dest->kind = PCOp_IMMEDIATE;
                    dest->data.imm.value = src->u.imm.value;
                    if (pc->flags & (fPCodeFlag2 | fPCodeFlag4))
                        pc->flags |= fPCodeFlag20;
                    dest->data.imm.obj = NULL;
                    break;

                case IAOpnd_Reg: {
                    int r20;
                    r20 = 0;
                    if (src->u.reg.object) {
                        if (Registers_GetVarInfo(src->u.reg.object)->flags & VarInfoFlag2) {
                            if (src->u.reg.num == 1)
                                r20 = OBJECT_REG_HI(src->u.reg.object);
                            else
                                r20 = OBJECT_REG(src->u.reg.object);
                        } else {
                            if (Registers_GetVarInfo(src->u.reg.object)->flags & VarInfoFlag40)
                                PPCError_Error(172, src->u.reg.object->name->name);
                            else
                                PPCError_Error(167, src->u.reg.object->name->name);
                        }
                    } else if (src->u.reg.num == INVALID_PIC_REG) {
                        r20 = pic_base_reg;
                    } else {
                        r20 = src->u.reg.num;
                    }

                    dest->kind = PCOp_REGISTER;
                    dest->arg = src->u.reg.rclass;
                    dest->data.reg.reg = r20;
                    dest->data.reg.effect = src->u.reg.effect;
                    if (pc->op == PC_RLWIMI && (dest->data.reg.effect & EffectWrite) && dest->arg == RegClass_GPR && !(dest->data.reg.effect & EffectRead))
                        CError_FATAL(3442);

                    if (dest->arg == RegClass_SPR) {
                        int i;
                        dest->kind = PCOp_SYSREG;
                        for (i = 0; i < 4; i++) {
                            if (dest->data.reg.reg == spr_to_sysreg[i]) {
                                dest->kind = PCOp_REGISTER;
                                dest->arg = RegClass_SPR;
                                dest->data.reg.reg = i;
                                break;
                            }
                        }
                        pcsetsideeffects(pc);
                    } else if (dest->arg == RegClass_6 || dest->arg == RegClass_DCR) {
                        short save = dest->data.reg.reg;
                        dest->kind = PCOp_IMMEDIATE;
                        dest->data.imm.value = save;
                        dest->data.imm.obj = NULL;
                        break;
                    }

                    if ((src->u.reg.effect & EffectWrite) && dest->data.reg.reg < n_real_registers[dest->arg]) {
                        if (src->u.reg.object) {
                            if (Registers_GetVarInfo(src->u.reg.object)->flags & VarInfoFlag4) {
                                int reg, regHi;
                                CError_ASSERT(3474, dest->arg == RegClass_GPR);

                                regHi = OBJECT_REG_HI(src->u.reg.object);
                                reg = OBJECT_REG(src->u.reg.object);
                                retain_GPR_pair(src->u.reg.object, reg, regHi);
                            } else {
                                retain_register(src->u.reg.object, dest->arg, dest->data.reg.reg);
                            }
                        } else {
                            retain_register(NULL, dest->arg, dest->data.reg.reg);
                        }
                    }

                    break;
                }

                case IAOpnd_Lab:
                    if (!src->u.lab.label->pclabel)
                        src->u.lab.label->pclabel = makepclabel();
                    dest->kind = PCOp_LABEL;
                    dest->data.label.label = src->u.lab.label->pclabel;
                    break;

                case IAOpnd_3:
                case IAOpnd_4:
                    dest->kind = PCOp_MEMORY;
                    dest->arg = src->u.obj.unk;
                    dest->data.mem.obj = src->u.obj.obj;
                    dest->data.mem.offset = src->u.obj.offset;
                    if (pc->flags & (fPCodeFlag2 | fPCodeFlag4 | fPCodeFlag20000 | fPCodeFlag40000)) {
                        pc->alias = make_alias(dest->data.mem.obj, dest->data.mem.offset, nbytes_loaded_or_stored_by(pc));
                        if (is_volatile_object(dest->data.mem.obj))
                            pc->flags |= fIsVolatile;
                        if (OBJ_GET_TARGET_CONST(dest->data.mem.obj))
                            pc->flags |= fIsConst;
                    }
                    break;

                case IAOpnd_LabDiff:
                    if (src->u.labdiff.label1->pclabel == NULL)
                        src->u.labdiff.label1->pclabel = makepclabel();
                    if (src->u.labdiff.label2->pclabel == NULL)
                        src->u.labdiff.label2->pclabel = makepclabel();
                    if (pc->flags & (fPCodeFlag2 | fPCodeFlag4))
                        pc->flags |= fPCodeFlag20;
                    dest->kind = PCOp_LABELDIFF;
                    dest->data.labeldiff.labelA = src->u.labdiff.label1->pclabel;
                    dest->data.labeldiff.labelB = src->u.labdiff.label2->pclabel;
                    dest->arg = src->negated;
                    dest->data.labeldiff.offset = src->u.labdiff.offset;
                    break;

                default:
                    CError_FATAL(3528);
            }
        }

        index++;
        dest++;
        src++;
    }

    if (ia->opcode == PC_STMW || ia->opcode == PC_LMW) {
        int i;
        for (i = reg; i < 32; i++, dest++) {
            dest->kind = PCOp_REGISTER;
            dest->arg = RegClass_GPR;
            dest->data.reg.reg = i;
            dest->data.reg.effect = (short) ((ia->opcode == PC_LMW) ? EffectWrite : EffectRead);
        }
    }

    if (ia->flags & IAFlag2) {
        UInt32 masks[5] = {0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF};
        branch_record_volatiles(dest, masks);
        if (copts.exceptions && current_statement && assembler_type == 0)
            noteexceptionactionregisters(current_statement->dobjstack, dest);
    }

    return pc;
}

void InlineAsm_TranslateIRtoPCode(Statement *stmt) {
    InlineAsm *ia;
    PCode *pc;

    ia = (InlineAsm *) stmt->expr;
    pc = InlineAsm_TranslateIRtoPCodePPC(ia, opcodeinfo[ia->opcode].x8, assembler_type);
    appendpcode(pclastblock, pc);

    if ((ia->flags2 & IAFlagsB_40) || !copts.optimizewithasm)
        setpcodeflags(fSideEffects);

    if (ia->flags2 & IAFlagsB_1) {
        if (PCODE_FLAG_SET_F(pc) & fPCodeFlag8000000)
            pcsetrecordbit(pclastblock->lastPCode);
        else
            CError_Error(CErrorStr261);
    }

    if (ia->flags2 & IAFlagsB_2) {
        if (PCODE_FLAG_SET_F(pc) & fPCodeFlag4000000)
            setpcodeflags(fOverflow); // idk?
        else
            CError_Error(CErrorStr261);
    }

    if (ia->flags2 & IAFlagsB_4) {
        if (PCODE_FLAG_SET_T(pc) & fPCodeFlag20000000) {
            int i;
            for (i = 0; i < pc->argCount; i++) {
                if (pc->args[i].kind == PCOp_LABEL || pc->args[i].kind == PCOp_MEMORY) {
                    PPCError_Error(177);
                    break;
                }
            }
            setpcodeflags(fAbsolute); // idk?
        } else {
            CError_Error(CErrorStr261);
        }
    }

    if (ia->flags2 & IAFlagsB_8) {
        if (PCODE_FLAG_SET_T(pc) & fPCodeFlag2000000) {
            pcsetlinkbit(pclastblock->lastPCode);
            if (!(ia->flags & IAFlag2)) {
                pclastblock->lastPCode->flags &= ~fPCodeFlag8;
                pclastblock->lastPCode->flags |= fPCodeFlag1;
            }
            makes_call = 1;
        } else {
            CError_Error(CErrorStr261);
        }
    }

    if (ia->flags2 & IAFlagsB_10)
        setpcodeflags(fPCodeFlag8000000);
    if (ia->flags2 & IAFlagsB_20)
        setpcodeflags(fPCodeFlag4000000);

    if (OPCODE_PART_1(opcodeinfo[pc->op].insn) == 16) {
        PCodeLabel *dest = NULL;
        PCodeLabel *src = makepclabel();
        switch (pc->op) {
            case PC_BC:
                if (pc->args[3].kind == PCOp_LABEL)
                    dest = pc->args[3].data.label.label;
                break;
            case PC_BT:
            case PC_BF:
            case PC_BDNZT:
            case PC_BDNZF:
            case PC_BDZT:
            case PC_BDZF:
                if (pc->args[2].kind == PCOp_LABEL)
                    dest = pc->args[2].data.label.label;
                break;
            case PC_BDNZ:
            case PC_BDZ:
                if (pc->args[0].kind == PCOp_LABEL)
                    dest = pc->args[0].data.label.label;
                break;
            default:
                CError_FATAL(3715);
        }

        if (dest) {
            pcbranch(pclastblock, dest);
            pcbranch(pclastblock, src);
            makepcblock();
            pclabel(pclastblock, src);
        }
        return;
    }

    if (OPCODE_PART_1(opcodeinfo[pc->op].insn) == 18) {
        PCodeLabel *label;
        if (ia->flags2 & IAFlagsB_8) {
            label = makepclabel();
            pcbranch(pclastblock, label);
        }
        if (pc->args[0].kind == PCOp_LABEL)
            pcbranch(pclastblock, pc->args[0].data.label.label);
        makepcblock();
        if (ia->flags2 & IAFlagsB_8) {
            pclabel(pclastblock, label);
        }
        return;
    }

    if (OPCODE_PART_1(opcodeinfo[pc->op].insn) == 19) {
        switch (pc->op) {
            case PC_BLR:
            case PC_RFI:
                if (asm_alloc_flags[3])
                    asm_alloc_flags[9] = 1;
                else
                    asm_alloc_flags[8] = 1;

                if (asm_alloc_flags[4])
                    asm_alloc_flags[5] = 1;

                if (pc->op == PC_BLR)
                    asm_alloc_flags[6] = 1;
                else
                    asm_alloc_flags[7] = 1;
                break;
        }
    }
}

const char *InlineAsm_GetMnemonic(InlineAsm *ia) {
    return opcodeinfo[ia->opcode].name;
}

static void savepicbase(short reg, HashNameNode *name) {
    IALookupResult result;

    if (!InlineAsm_LookupSymbol(name, &result))
        result.label = InlineAsm_DeclareLabel(name);

    pic_base_label = result.label;
    pic_base_reg = reg;
    uses_globals = 1;
}

static SInt32 InlineAsm_OpcodeSize(InlineAsm *ia) {
    if (opcodeinfo[ia->opcode].flags & (fPCodeFlag2 | fPCodeFlag4)) {
        switch (ia->opcode) {
            case PC_LBZ:
            case PC_LBZU:
            case PC_LBZX:
            case PC_LBZUX:
            case PC_STB:
            case PC_STBU:
            case PC_STBX:
            case PC_STBUX:
                return 1;
            case PC_LHZ:
            case PC_LHZU:
            case PC_LHZX:
            case PC_LHZUX:
            case PC_LHA:
            case PC_LHAU:
            case PC_LHAX:
            case PC_LHAUX:
            case PC_LHBRX:
            case PC_STH:
            case PC_STHU:
            case PC_STHX:
            case PC_STHUX:
            case PC_STHBRX:
                return 2;
            case PC_LWZ:
            case PC_LWZU:
            case PC_LWZX:
            case PC_LWZUX:
            case PC_LWBRX:
            case PC_STW:
            case PC_STWU:
            case PC_STWX:
            case PC_STWUX:
            case PC_STWBRX:
            case PC_LFS:
            case PC_LFSU:
            case PC_LFSX:
            case PC_LFSUX:
            case PC_STFS:
            case PC_STFSU:
            case PC_STFSX:
            case PC_STFSUX:
            case PC_LWARX:
            case PC_STFIWX:
            case PC_STWCX:
            case PC_ECIWX:
            case PC_ECOWX:
            case PC_MFROM:
            case PC_LSCBX:
                return 4;
            case PC_LMW:
            case PC_STMW:
                if (ia->args[0].type == IAOpnd_Reg && ia->args[0].u.reg.object == NULL)
                    return (32 - ia->args[0].u.reg.num) * 4;
                else
                    return 128;
            case PC_LFD:
            case PC_LFDU:
            case PC_LFDX:
            case PC_LFDUX:
            case PC_STFD:
            case PC_STFDU:
            case PC_STFDX:
            case PC_STFDUX:
                return 8;
            case PC_LSWI:
            case PC_STSWI:
                return ia->args[2].u.imm.value;
            case PC_LSWX:
            case PC_STSWX:
                return 128;
            case PC_LVEBX:
            case PC_STVEBX:
                return 1;
            case PC_LVEHX:
            case PC_STVEHX:
                return 2;
            case PC_LVEWX:
            case PC_STVEWX:
                return 4;
            case PC_LVSL:
            case PC_LVSR:
            case PC_LVX:
            case PC_LVXL:
            case PC_STVX:
            case PC_STVXL:
                return 16;
            default:
                CError_FATAL(3924);
        }
    } else {
        if (opcodeinfo[ia->opcode].flags & fPCodeFlag80000000)
            return 4;
        if (opcodeinfo[ia->opcode].flags & fPCodeFlag40000000)
            return 8;
        if (opcodeinfo[ia->opcode].flags & (fPCodeFlag80000000 | fPCodeFlag40000000))
            return 16;

        if (opcodeinfo[ia->opcode].flags & fSideEffects) {
            switch (ia->opcode) {
                case PC_TLBIE:
                case PC_TLBLD:
                case PC_TLBLI:
                    return 4;
                default:
                    CError_FATAL(3941);
            }
        }
    }

    CError_FATAL(3944);
    return 0;
}

void CodeGen_GetAsmEffects(Statement *stmt, IAEffects *effects) {
    InlineAsm *ia;
    OpcodeInfo *info;
    int i;
    IAOperand *op;
    VarInfo *vi;

    ia = (InlineAsm *) stmt->expr;
    info = &opcodeinfo[ia->opcode];

    effects->numoperands = 0;
    effects->numlabels = 0;
    effects->x1 = 0;
    effects->x2 = 0;
    effects->x3 = 0;
    effects->x4 = 0;
    effects->x0 = 0;
    effects->x5 = 0;

    if (info->flags & fPCodeFlag20) {
        if (info->flags & fPCodeFlag2)
            effects->x1 = 1;
        if (info->flags & fPCodeFlag4)
            effects->x2 = 1;
    }

    if (PCODE_FLAG_SET_T(info) & fPCodeFlag2000000) {
        if (ia->flags2 & IAFlagsB_8)
            effects->x4 = 1;
        else if ((info->flags & fPCodeFlag8) || (info->flags & fPCodeFlag4))
            effects->x3 = 1;

        if (ia->opcode == PC_B) {
            if (ia->args[0].type == IAOpnd_Imm)
                effects->x0 = 1;
            effects->x5 = 1;
        }
    }

    if (info->flags & fSideEffects)
        effects->x0 = 1;

    if (ia->opcode == PC_BC && (ia->flags2 & IAFlagsB_8))
        effects->x4 = 1;

    for (i = 0, op = ia->args; i < ia->argcount; i++, op++) {
        switch (op->type) {
            case IAOpnd_0:
            case IAOpnd_Imm:
                break;
            case IAOpnd_Reg:
                if (op->u.reg.object) {
                    if ((vi = Registers_GetVarInfo(op->u.reg.object)))
                        vi->flags |= VarInfoFlag40;
                    if (op->u.reg.effect & EffectRead) {
                        if (
                                TYPE_FITS_IN_REGISTER(op->u.reg.object->type) ||
                                IS_TYPE_FLOAT(op->u.reg.object->type) ||
                                IS_TYPE_VECTOR(op->u.reg.object->type)
                                ) {
                            effects->operands[effects->numoperands].type = IAEffect_0;
                            effects->operands[effects->numoperands].object = op->u.reg.object;
                            effects->operands[effects->numoperands].offset = 0;
                            effects->operands[effects->numoperands].size = op->u.reg.object->type->size;
                            effects->numoperands++;
                        } else {
                            CError_FATAL(4051);
                        }
                    }
                }
                break;
            case IAOpnd_3:
            case IAOpnd_4:
                if (op->u.obj.obj) {
                    if (info->flags & fPCodeFlag2) {
                        effects->operands[effects->numoperands].type = IAEffect_0;
                        effects->operands[effects->numoperands].object = op->u.obj.obj;
                        effects->operands[effects->numoperands].offset = op->u.obj.offset;
                        effects->operands[effects->numoperands].size = InlineAsm_OpcodeSize(ia);
                        effects->numoperands++;
                    } else if (!(info->flags & (fPCodeFlag1 | fPCodeFlag8))) {
                        effects->operands[effects->numoperands].type = IAEffect_3;
                        effects->operands[effects->numoperands].object = op->u.obj.obj;
                        effects->operands[effects->numoperands].offset = op->u.obj.offset;
                        effects->operands[effects->numoperands].size = InlineAsm_OpcodeSize(ia);
                        effects->numoperands++;
                    }
                }
                break;
            case IAOpnd_Lab:
                effects->labels[effects->numlabels] = op->u.lab.label;
                effects->numlabels++;
                break;
            case IAOpnd_LabDiff:
                effects->labels[effects->numlabels] = op->u.labdiff.label1;
                effects->numlabels++;
                effects->labels[effects->numlabels] = op->u.labdiff.label2;
                effects->numlabels++;
                effects->x3 = 1;
                break;
            default:
                CError_FATAL(4087);
        }

        CError_ASSERT(4090, effects->numoperands <= 16);
        CError_ASSERT(4093, effects->numlabels <= 16);
    }

    for (i = 0, op = ia->args; i < ia->argcount; i++, op++) {
        switch (op->type) {
            case IAOpnd_Reg:
                if (op->u.reg.object) {
                    if ((vi = Registers_GetVarInfo(op->u.reg.object)))
                        vi->flags |= VarInfoFlag40;
                    if (op->u.reg.effect & EffectWrite) {
                        if (
                                TYPE_FITS_IN_REGISTER(op->u.reg.object->type) ||
                                IS_TYPE_FLOAT(op->u.reg.object->type) ||
                                IS_TYPE_VECTOR(op->u.reg.object->type)
                                ) {
                            effects->operands[effects->numoperands].type = IAEffect_1;
                            effects->operands[effects->numoperands].object = op->u.reg.object;
                            effects->operands[effects->numoperands].offset = 0;
                            effects->operands[effects->numoperands].size = op->u.reg.object->type->size;
                            effects->numoperands++;
                        } else {
                            CError_FATAL(4132);
                        }
                    }
                }
                break;
            case IAOpnd_3:
            case IAOpnd_4:
                if (op->u.obj.obj) {
                    if (info->flags & fPCodeFlag4) {
                        effects->operands[effects->numoperands].type = IAEffect_1;
                        effects->operands[effects->numoperands].object = op->u.obj.obj;
                        effects->operands[effects->numoperands].offset = op->u.obj.offset;
                        effects->operands[effects->numoperands].size = InlineAsm_OpcodeSize(ia);
                        effects->numoperands++;
                    }
                }
                break;
        }

        CError_ASSERT(4151, effects->numoperands <= 16);
    }

    if ((info->flags & (fPCodeFlag1 | fPCodeFlag8)) && (SInt32)effects->numlabels == 0)
        effects->x3 = 1;
}

void CodeGen_PropagateIntoAsm(Statement *stmt, Object *obj, ENode *expr) {
    InlineAsm *ia;
    Object *newobj;

    ia = (InlineAsm *) stmt->expr;
    if (ENODE_IS(expr, EOBJREF)) {
        newobj = expr->data.objref;
        if (obj->otype == newobj->otype && obj->datatype == newobj->datatype) {
            int i;
            for (i = 0; i < ia->argcount; i++) {
                switch (ia->args[i].type) {
                    case IAOpnd_Reg:
                        if (ia->args[i].u.reg.object == obj &&
                            (ia->args[i].u.reg.effect & (EffectRead | EffectWrite)) == EffectRead) {
                            if (TYPE_FITS_IN_REGISTER(newobj->type) &&
                                ia->args[i].u.reg.rclass == RegClass_GPR) {
                                ia->args[i].u.reg.object = newobj;
                            } else if (IS_TYPE_FLOAT(newobj->type) &&
                                       ia->args[i].u.reg.rclass == RegClass_FPR) {
                                ia->args[i].u.reg.object = newobj;
                            } else if (IS_TYPE_VECTOR(newobj->type) &&
                                       ia->args[i].u.reg.rclass == RegClass_VR) {
                                ia->args[i].u.reg.object = newobj;
                            }
                        }
                        break;
                    case IAOpnd_3:
                    case IAOpnd_4:
                        if (!(opcodeinfo[ia->opcode].flags & (fPCodeFlag4 | fPCodeFlag40000)) &&
                            ia->args[i].u.obj.obj == obj)
                            ia->args[i].u.obj.obj = newobj;
                        break;
                }
            }
        }
    }
}

Statement *CodeGen_CopyAsmStat(Statement *stmt) {
    Statement *copy;
    SInt32 size;
    InlineAsm *ia;
    InlineAsm *iacopy;

    copy = galloc(sizeof(Statement));
    *copy = *stmt;

    ia = (InlineAsm *) stmt->expr;
    size = sizeof(InlineAsm) + sizeof(IAOperand) * ia->argcount;
    iacopy = galloc(size);
    memcpy(iacopy, ia, size);
    copy->expr = (ENode *) iacopy;

    return copy;
}