isa: fix `rlwinm`'s mnemonic `slwi` using `ME` instead of `SH` as arg

disasm/src/generated.rs

@@ -5843,7 +5843,7 @@ impl Ins {
                         args: vec![
                             Argument::GPR(GPR(((self.code >> 16u8) & 0x1f) as _)),
                             Argument::GPR(GPR(((self.code >> 21u8) & 0x1f) as _)),
-                            Argument::OpaqueU(OpaqueU(((self.code >> 1u8) & 0x1f) as _)),
+                            Argument::OpaqueU(OpaqueU(((self.code >> 11u8) & 0x1f) as _)),
                         ],
                         ins: self,
                     };

disasm/tests/test_disasm.rs

@@ -784,6 +784,9 @@ fn test_ins_rlwimi() {
 fn test_ins_rlwinm() {
     assert_asm!(0x54000423, "rlwinm. r0, r0, 0, 16, 17");
     assert_asm!(0x54000432, "rlwinm r0, r0, 0, 16, 25");
+
+    // mnemonics
+    assert_asm!(0x57E5103A, "slwi r5, r31, 2");
 }
 
 #[test]

isa.yaml

@@ -1976,7 +1976,7 @@ mnemonics:
     condition: MB == 0 && ME == 31
   - name: slwi
     opcode: rlwinm
-    args: [ rA, rS, ME ]
+    args: [ rA, rS, SH ]
     condition: MB == 0 && 31 - SH == ME
   - name: srwi
     opcode: rlwinm