diff options
Diffstat (limited to 'src/core/arm')
| -rw-r--r-- | src/core/arm/interpreter/armemu.cpp | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/src/core/arm/interpreter/armemu.cpp b/src/core/arm/interpreter/armemu.cpp index 71cae3db0..de178a890 100644 --- a/src/core/arm/interpreter/armemu.cpp +++ b/src/core/arm/interpreter/armemu.cpp @@ -3103,12 +3103,18 @@ mainswitch: state->Reg[idest] = (state->Reg[rfis] & 0xFFFF) | ((state->Reg[rlast] << ishi) & 0xFFFF0000); break; } else if ((instr & 0x70) == 0x50) { //pkhtb - u8 idest = BITS(12, 15); - u8 rfis = BITS(16, 19); - u8 rlast = BITS(0, 3); - u8 ishi = BITS(7, 11); - if (ishi == 0)ishi = 0x20; - state->Reg[idest] = (((int)(state->Reg[rlast]) >> (int)(ishi))& 0xFFFF) | ((state->Reg[rfis]) & 0xFFFF0000); + const u8 rd_idx = BITS(12, 15); + const u8 rn_idx = BITS(16, 19); + const u8 rm_idx = BITS(0, 3); + const u8 imm5 = BITS(7, 11); + + ARMword val; + if (imm5 >= 32) + val = (state->Reg[rm_idx] >> 31); + else + val = (state->Reg[rm_idx] >> imm5); + + state->Reg[rd_idx] = (val & 0xFFFF) | ((state->Reg[rn_idx]) & 0xFFFF0000); break; } else if (BIT (4)) { #ifdef MODE32 |