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-rw-r--r--src/core/arm/interpreter/armemu.cpp71
1 files changed, 23 insertions, 48 deletions
diff --git a/src/core/arm/interpreter/armemu.cpp b/src/core/arm/interpreter/armemu.cpp
index 5d26456c7..a955d6aac 100644
--- a/src/core/arm/interpreter/armemu.cpp
+++ b/src/core/arm/interpreter/armemu.cpp
@@ -6496,58 +6496,33 @@ L_stm_s_takeabort:
return 1;
}
- case 0x6f: {
- ARMword Rm;
- int ror = -1;
-
- switch (BITS(4, 11)) {
- case 0x07:
- ror = 0;
- break;
- case 0x47:
- ror = 8;
- break;
- case 0x87:
- ror = 16;
- break;
- case 0xc7:
- ror = 24;
- break;
+ case 0x6f: // UXTH, UXTAH, and REVSH.
+ {
+ const u8 op2 = BITS(5, 7);
- case 0xfb: // REVSH
- {
- DEST = ((RHS & 0xFF) << 8) | ((RHS & 0xFF00) >> 8);
- if (DEST & 0x8000)
- DEST |= 0xffff0000;
- return 1;
- }
- default:
- break;
+ // REVSH
+ if (op2 == 0x05) {
+ DEST = ((RHS & 0xFF) << 8) | ((RHS & 0xFF00) >> 8);
+ if (DEST & 0x8000)
+ DEST |= 0xffff0000;
+ return 1;
}
+ // UXTH and UXTAH
+ else if (op2 == 0x03) {
+ const u8 rotate = BITS(10, 11) * 8;
+ const ARMword rm = ((state->Reg[BITS(0, 3)] >> rotate) & 0xFFFF) | (((state->Reg[BITS(0, 3)] << (32 - rotate)) & 0xFFFF) & 0xFFFF);
+
+ // UXTH
+ if (BITS(16, 19) == 0xf) {
+ state->Reg[BITS(12, 15)] = rm;
+ }
+ // UXTAH
+ else {
+ state->Reg[BITS(12, 15)] = state->Reg[BITS(16, 19)] + rm;
+ }
- if (ror == -1)
- break;
-
- Rm = ((state->Reg[BITS(0, 3)] >> ror) & 0xFFFF) | (((state->Reg[BITS(0, 3)] << (32 - ror)) & 0xFFFF) & 0xFFFF);
-
- /* UXT */
- /* state->Reg[BITS (12, 15)] = Rm; */
- /* dyf add */
- if (BITS(16, 19) == 0xf) {
- state->Reg[BITS(12, 15)] = Rm;
- }
- else {
- /* UXTAH */
- /* state->Reg[BITS (12, 15)] = state->Reg [BITS (16, 19)] + Rm; */
- // printf("rd is %x rn is %x rm is %x rotate is %x\n", state->Reg[BITS (12, 15)], state->Reg[BITS (16, 19)]
- // , Rm, BITS(10, 11));
- // printf("icounter is %lld\n", state->NumInstrs);
- state->Reg[BITS(12, 15)] = state->Reg[BITS(16, 19)] + Rm;
- // printf("rd is %x\n", state->Reg[BITS (12, 15)]);
- // exit(-1);
+ return 1;
}
-
- return 1;
}
case 0x70:
// ichfly