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armemu: Implement QASX and QSAX

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This commit is contained in:
Lioncash 2014-12-19 14:05:18 -05:00
parent 017e6a488e
commit 4b506cec01
1 changed files with 21 additions and 8 deletions
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29
src/core/arm/interpreter/armemu.cpp
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@ -5885,8 +5885,10 @@ L_stm_s_takeabort:
printf("Unhandled v6 insn: %08x", BITS(20, 27));
}
break;
case 0x62: // QSUB16 and QADD16
if ((instr & 0xFF0) == 0xf70 || (instr & 0xFF0) == 0xf10) {
case 0x62: // QADD16, QASX, QSAX, and QSUB16
if ((instr & 0xFF0) == 0xf10 || (instr & 0xFF0) == 0xf30 ||
(instr & 0xFF0) == 0xf50 || (instr & 0xFF0) == 0xf70)
{
const u8 rd_idx = BITS(12, 15);
const u8 rn_idx = BITS(16, 19);
const u8 rm_idx = BITS(0, 3);
@ -5898,15 +5900,26 @@ L_stm_s_takeabort:
s32 lo_result;
s32 hi_result;
// QSUB16
if ((instr & 0xFF0) == 0xf70) {
lo_result = (rn_lo - rm_lo);
hi_result = (rn_hi - rm_hi);
}
else { // QADD16
// QADD16
if ((instr & 0xFF0) == 0xf10) {
lo_result = (rn_lo + rm_lo);
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)
lo_result = 0x7FFF;