diff options
| -rw-r--r-- | src/core/arm/interpreter/armemu.cpp | 78 |
1 files changed, 28 insertions, 50 deletions
diff --git a/src/core/arm/interpreter/armemu.cpp b/src/core/arm/interpreter/armemu.cpp index b9c2aa6c2..43b1ba40e 100644 --- a/src/core/arm/interpreter/armemu.cpp +++ b/src/core/arm/interpreter/armemu.cpp @@ -5881,67 +5881,45 @@ L_stm_s_takeabort: const u32 rm_val = state->Reg[rm_idx]; const u32 rn_val = state->Reg[rn_idx]; - u8 lo_val1; - u8 lo_val2; - u8 hi_val1; - u8 hi_val2; + s32 lo_val1, lo_val2; + s32 hi_val1, hi_val2; // SADD8 if ((instr & 0xFF0) == 0xf90) { - lo_val1 = (u8)((rn_val & 0xFF) + (rm_val & 0xFF)); - lo_val2 = (u8)(((rn_val >> 8) & 0xFF) + ((rm_val >> 8) & 0xFF)); - hi_val1 = (u8)(((rn_val >> 16) & 0xFF) + ((rm_val >> 16) & 0xFF)); - hi_val2 = (u8)(((rn_val >> 24) & 0xFF) + ((rm_val >> 24) & 0xFF)); - - if (lo_val1 & 0x80) - state->GEFlag |= (1 << 16); - else - state->GEFlag &= ~(1 << 16); - - if (lo_val2 & 0x80) - state->GEFlag |= (1 << 17); - else - state->GEFlag &= ~(1 << 17); - - if (hi_val1 & 0x80) - state->GEFlag |= (1 << 18); - else - state->GEFlag &= ~(1 << 18); - - if (hi_val2 & 0x80) - state->GEFlag |= (1 << 19); - else - state->GEFlag &= ~(1 << 19); + lo_val1 = (s32)(s8)(rn_val & 0xFF) + (s32)(s8)(rm_val & 0xFF); + lo_val2 = (s32)(s8)((rn_val >> 8) & 0xFF) + (s32)(s8)((rm_val >> 8) & 0xFF); + hi_val1 = (s32)(s8)((rn_val >> 16) & 0xFF) + (s32)(s8)((rm_val >> 16) & 0xFF); + hi_val2 = (s32)(s8)((rn_val >> 24) & 0xFF) + (s32)(s8)((rm_val >> 24) & 0xFF); } // SSUB8 else { - lo_val1 = (u8)((rn_val & 0xFF) - (rm_val & 0xFF)); - lo_val2 = (u8)(((rn_val >> 8) & 0xFF) - ((rm_val >> 8) & 0xFF)); - hi_val1 = (u8)(((rn_val >> 16) & 0xFF) - ((rm_val >> 16) & 0xFF)); - hi_val2 = (u8)(((rn_val >> 24) & 0xFF) - ((rm_val >> 24) & 0xFF)); + lo_val1 = (s32)(s8)(rn_val & 0xFF) - (s32)(s8)(rm_val & 0xFF); + lo_val2 = (s32)(s8)((rn_val >> 8) & 0xFF) - (s32)(s8)((rm_val >> 8) & 0xFF); + hi_val1 = (s32)(s8)((rn_val >> 16) & 0xFF) - (s32)(s8)((rm_val >> 16) & 0xFF); + hi_val2 = (s32)(s8)((rn_val >> 24) & 0xFF) - (s32)(s8)((rm_val >> 24) & 0xFF); + } - if (!(lo_val1 & 0x80)) - state->GEFlag |= (1 << 16); - else - state->GEFlag &= ~(1 << 16); + if (lo_val1 >= 0) + state->GEFlag |= (1 << 16); + else + state->GEFlag &= ~(1 << 16); - if (!(lo_val2 & 0x80)) - state->GEFlag |= (1 << 17); - else - state->GEFlag &= ~(1 << 17); + if (lo_val2 >= 0) + state->GEFlag |= (1 << 17); + else + state->GEFlag &= ~(1 << 17); - if (!(hi_val1 & 0x80)) - state->GEFlag |= (1 << 18); - else - state->GEFlag &= ~(1 << 18); + if (hi_val1 >= 0) + state->GEFlag |= (1 << 18); + else + state->GEFlag &= ~(1 << 18); - if (!(hi_val2 & 0x80)) - state->GEFlag |= (1 << 19); - else - state->GEFlag &= ~(1 << 19); - } + if (hi_val2 >= 0) + state->GEFlag |= (1 << 19); + else + state->GEFlag &= ~(1 << 19); - state->Reg[rd_idx] = (lo_val1 | lo_val2 << 8 | hi_val1 << 16 | hi_val2 << 24); + state->Reg[rd_idx] = ((lo_val1 & 0xFF) | ((lo_val2 & 0xFF) << 8) | ((hi_val1 & 0xFF) << 16) | ((hi_val2 & 0xFF) << 24)); return 1; } else { |