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Merge pull request #297 from lioncash/ssub16

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armemu: Fix SSUB16
This commit is contained in:
bunnei 2014-12-17 20:56:37 -05:00
parent 7bae450379 58dc554733
commit e00e303275
1 changed files with 8 additions and 8 deletions
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16
src/core/arm/interpreter/armemu.cpp
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@ -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);