diff options
Diffstat (limited to 'src/core/arm/interpreter/armemu.cpp')
| -rw-r--r-- | src/core/arm/interpreter/armemu.cpp | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/src/core/arm/interpreter/armemu.cpp b/src/core/arm/interpreter/armemu.cpp index 1a589e39c..2b5d8c68e 100644 --- a/src/core/arm/interpreter/armemu.cpp +++ b/src/core/arm/interpreter/armemu.cpp @@ -5801,14 +5801,14 @@ L_stm_s_takeabort: break; case 0x61: if ((instr & 0xFF0) == 0xf70) { //ssub16 - u8 tar = BITS(12, 15); - u8 src1 = BITS(16, 19); - u8 src2 = BITS(0, 3); - s16 a1 = (state->Reg[src1] & 0xFFFF); - s16 a2 = ((state->Reg[src1] >> 0x10) & 0xFFFF); - s16 b1 = (state->Reg[src2] & 0xFFFF); - s16 b2 = ((state->Reg[src2] >> 0x10) & 0xFFFF); - state->Reg[tar] = ((a1 - a2) & 0xFFFF) | (((b1 - b2) & 0xFFFF) << 0x10); + const u8 rd_idx = BITS(12, 15); + const u8 rm_idx = BITS(0, 3); + const u8 rn_idx = BITS(16, 19); + const s16 rn_lo = (state->Reg[rn_idx] & 0xFFFF); + const s16 rn_hi = ((state->Reg[rn_idx] >> 16) & 0xFFFF); + const s16 rm_lo = (state->Reg[rm_idx] & 0xFFFF); + const s16 rm_hi = ((state->Reg[rm_idx] >> 16) & 0xFFFF); + state->Reg[rd_idx] = ((rn_lo - rm_lo) & 0xFFFF) | (((rn_hi - rm_hi) & 0xFFFF) << 16); return 1; } else if ((instr & 0xFF0) == 0xf10) { //sadd16 const u8 rd_idx = BITS(12, 15); |