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ir: Add opcodes for performing vector halving subtracts

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This commit is contained in:
Lioncash
2018-05-07 12:07:56 -04:00
committed by MerryMage
parent 4f37c0ec5a
commit 44a5f8095a
4 changed files with 120 additions and 0 deletions
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86
src/backend_x64/emit_x64_vector.cpp
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@@ -849,6 +849,92 @@ void EmitX64::EmitVectorHalvingAddU32(EmitContext& ctx, IR::Inst* inst) {
EmitVectorHalvingAddUnsigned(32, ctx, inst, code);
}
static void EmitVectorHalvingSubSigned(size_t esize, EmitContext& ctx, IR::Inst* inst, BlockOfCode& code) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
const Xbyak::Xmm a = ctx.reg_alloc.UseScratchXmm(args[0]);
const Xbyak::Xmm b = ctx.reg_alloc.UseScratchXmm(args[1]);
switch (esize) {
case 8: {
const Xbyak::Xmm tmp = ctx.reg_alloc.ScratchXmm();
code.movdqa(tmp, code.MConst(xword, 0x8080808080808080, 0x8080808080808080));
code.pxor(a, tmp);
code.pxor(b, tmp);
code.pavgb(b, a);
code.psubb(a, b);
break;
}
case 16: {
const Xbyak::Xmm tmp = ctx.reg_alloc.ScratchXmm();
code.movdqa(tmp, code.MConst(xword, 0x8000800080008000, 0x8000800080008000));
code.pxor(a, tmp);
code.pxor(b, tmp);
code.pavgw(b, a);
code.psubw(a, b);
break;
}
case 32:
code.pxor(a, b);
code.pand(b, a);
code.psrad(a, 1);
code.psubd(a, b);
break;
}
ctx.reg_alloc.DefineValue(inst, a);
}
void EmitX64::EmitVectorHalvingSubS8(EmitContext& ctx, IR::Inst* inst) {
EmitVectorHalvingSubSigned(8, ctx, inst, code);
}
void EmitX64::EmitVectorHalvingSubS16(EmitContext& ctx, IR::Inst* inst) {
EmitVectorHalvingSubSigned(16, ctx, inst, code);
}
void EmitX64::EmitVectorHalvingSubS32(EmitContext& ctx, IR::Inst* inst) {
EmitVectorHalvingSubSigned(32, ctx, inst, code);
}
static void EmitVectorHalvingSubUnsigned(size_t esize, EmitContext& ctx, IR::Inst* inst, BlockOfCode& code) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
const Xbyak::Xmm a = ctx.reg_alloc.UseScratchXmm(args[0]);
const Xbyak::Xmm b = ctx.reg_alloc.UseScratchXmm(args[1]);
switch (esize) {
case 8:
code.pavgb(b, a);
code.psubb(a, b);
break;
case 16:
code.pavgw(b, a);
code.psubw(a, b);
break;
case 32:
code.pxor(a, b);
code.pand(b, a);
code.psrld(a, 1);
code.psubd(a, b);
break;
}
ctx.reg_alloc.DefineValue(inst, a);
}
void EmitX64::EmitVectorHalvingSubU8(EmitContext& ctx, IR::Inst* inst) {
EmitVectorHalvingSubUnsigned(8, ctx, inst, code);
}
void EmitX64::EmitVectorHalvingSubU16(EmitContext& ctx, IR::Inst* inst) {
EmitVectorHalvingSubUnsigned(16, ctx, inst, code);
}
void EmitX64::EmitVectorHalvingSubU32(EmitContext& ctx, IR::Inst* inst) {
EmitVectorHalvingSubUnsigned(32, ctx, inst, code);
}
static void EmitVectorInterleaveLower(BlockOfCode& code, EmitContext& ctx, IR::Inst* inst, int size) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);