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armemu: Join SMUAD, SMUSD, and SMLAD

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This commit is contained in:
Lioncash 2014-12-16 01:59:46 -05:00
parent 0fd731ee63
commit 0f9e3baf39
1 changed files with 32 additions and 35 deletions
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67
src/core/arm/interpreter/armemu.cpp
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@ -6222,45 +6222,42 @@ L_stm_s_takeabort:
return 1;
}
case 0x70:
if ((instr & 0xf0d0) == 0xf010) { //smuad //ichfly
u8 tar = BITS(16, 19);
u8 src1 = BITS(0, 3);
u8 src2 = BITS(8, 11);
u8 swap = BIT(5);
s16 a1 = (state->Reg[src1] & 0xFFFF);
s16 a2 = ((state->Reg[src1] >> 0x10) & 0xFFFF);
s16 b1 = swap ? ((state->Reg[src2] >> 0x10) & 0xFFFF) : (state->Reg[src2] & 0xFFFF);
s16 b2 = swap ? (state->Reg[src2] & 0xFFFF) : ((state->Reg[src2] >> 0x10) & 0xFFFF);
state->Reg[tar] = a1*a2 + b1*b2;
return 1;
// ichfly
// SMUAD, SMUSD, SMLAD
if ((instr & 0xf0d0) == 0xf010 || (instr & 0xf0d0) == 0xf050 || (instr & 0xd0) == 0x10) {
const u8 rd_idx = BITS(16, 19);
const u8 rn_idx = BITS(0, 3);
const u8 rm_idx = BITS(8, 11);
const bool do_swap = (BIT(5) == 1);
} else if ((instr & 0xf0d0) == 0xf050) { //smusd
u8 tar = BITS(16, 19);
u8 src1 = BITS(0, 3);
u8 src2 = BITS(8, 11);
u8 swap = BIT(5);
s16 a1 = (state->Reg[src1] & 0xFFFF);
s16 a2 = ((state->Reg[src1] >> 0x10) & 0xFFFF);
s16 b1 = swap ? ((state->Reg[src2] >> 0x10) & 0xFFFF) : (state->Reg[src2] & 0xFFFF);
s16 b2 = swap ? (state->Reg[src2] & 0xFFFF) : ((state->Reg[src2] >> 0x10) & 0xFFFF);
state->Reg[tar] = a1*a2 - b1*b2;
return 1;
} else if ((instr & 0xd0) == 0x10) { //smlad
u8 tar = BITS(16, 19);
u8 src1 = BITS(0, 3);
u8 src2 = BITS(8, 11);
u8 src3 = BITS(12, 15);
u8 swap = BIT(5);
u32 rm_val = state->Reg[rm_idx];
const u32 rn_val = state->Reg[rn_idx];
u32 a3 = state->Reg[src3];
if (do_swap)
rm_val = (((rm_val & 0xFFFF) << 16) | (rm_val >> 16));
s16 a1 = (state->Reg[src1] & 0xFFFF);
s16 a2 = ((state->Reg[src1] >> 0x10) & 0xFFFF);
s16 b1 = swap ? ((state->Reg[src2] >> 0x10) & 0xFFFF) : (state->Reg[src2] & 0xFFFF);
s16 b2 = swap ? (state->Reg[src2] & 0xFFFF) : ((state->Reg[src2] >> 0x10) & 0xFFFF);
state->Reg[tar] = a1*a2 + b1*b2 + a3;
const s16 rm_lo = (rm_val & 0xFFFF);
const s16 rm_hi = ((rm_val >> 16) & 0xFFFF);
const s16 rn_lo = (rn_val & 0xFFFF);
const s16 rn_hi = ((rn_val >> 16) & 0xFFFF);
// SMUAD
if ((instr & 0xf0d0) == 0xf010) {
state->Reg[rd_idx] = (rn_lo * rn_hi) + (rm_lo * rm_hi);
}
// SMUSD
else if ((instr & 0xf0d0) == 0xf050) {
state->Reg[rd_idx] = (rn_lo * rn_hi) - (rm_lo * rm_hi);
}
// SMLAD
else {
const u8 ra_idx = BITS(12, 15);
state->Reg[rd_idx] = (rn_lo * rn_hi) + (rm_lo * rm_hi) + (s32)state->Reg[ra_idx];
}
return 1;
} else printf ("Unhandled v6 insn: smuad/smusd/smlad/smlsd\n");
} else {
printf ("Unhandled v6 insn: smlsd\n");
}
break;
case 0x74:
printf ("Unhandled v6 insn: smlald/smlsld\n");