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Merge pull request #314 from lioncash/qsax-qasx 

armemu: Implement QASX and QSAX
This commit is contained in:
bunnei 2014-12-20 15:18:05 -05:00
parent acabd7be82 4b506cec01
commit 1c50a036dd
1 changed files with 21 additions and 8 deletions
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29
src/core/arm/interpreter/armemu.cpp
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@ -5882,8 +5882,10 @@ L_stm_s_takeabort:
printf("Unhandled v6 insn: %08x", BITS(20, 27)); printf("Unhandled v6 insn: %08x", BITS(20, 27));
} }
break; break;
case 0x62: // QSUB16 and QADD16 case 0x62: // QADD16, QASX, QSAX, and QSUB16
if ((instr & 0xFF0) == 0xf70 || (instr & 0xFF0) == 0xf10) { if ((instr & 0xFF0) == 0xf10 || (instr & 0xFF0) == 0xf30 ||
(instr & 0xFF0) == 0xf50 || (instr & 0xFF0) == 0xf70)
{
const u8 rd_idx = BITS(12, 15); const u8 rd_idx = BITS(12, 15);
const u8 rn_idx = BITS(16, 19); const u8 rn_idx = BITS(16, 19);
const u8 rm_idx = BITS(0, 3); const u8 rm_idx = BITS(0, 3);
@ -5895,15 +5897,26 @@ L_stm_s_takeabort:
s32 lo_result; s32 lo_result;
s32 hi_result; s32 hi_result;
// QSUB16 // QADD16
if ((instr & 0xFF0) == 0xf70) { if ((instr & 0xFF0) == 0xf10) {
lo_result = (rn_lo - rm_lo);
hi_result = (rn_hi - rm_hi);
}
else { // QADD16
lo_result = (rn_lo + rm_lo); lo_result = (rn_lo + rm_lo);
hi_result = (rn_hi + rm_hi); hi_result = (rn_hi + rm_hi);
} }
// QASX
else if ((instr & 0xFF0) == 0xf30) {
lo_result = (rn_lo - rm_hi);
hi_result = (rn_hi + rm_lo);
}
// QSAX
else if ((instr & 0xFF0) == 0xf50) {
lo_result = (rn_lo + rm_hi);
hi_result = (rn_hi - rm_lo);
}
// QSUB16
else {
lo_result = (rn_lo - rm_lo);
hi_result = (rn_hi - rm_hi);
}
if (lo_result > 0x7FFF) if (lo_result > 0x7FFF)
lo_result = 0x7FFF; lo_result = 0x7FFF;