diff options
Diffstat (limited to 'src')
-rw-r--r-- | src/core/arm/interpreter/armemu.cpp | 71 |
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 |