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ir: Add opcodes for performing halving adds

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This commit is contained in:
Lioncash
2018-05-04 08:22:14 -04:00
committed by MerryMage
parent 3d00dd63b4
commit 089096948a
4 changed files with 131 additions and 6 deletions
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103
src/backend_x64/emit_x64_vector.cpp
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@@ -357,12 +357,8 @@ void EmitX64::EmitVectorAnd(EmitContext& ctx, IR::Inst* inst) {
EmitVectorOperation(code, ctx, inst, &Xbyak::CodeGenerator::pand);
}
void EmitX64::EmitVectorArithmeticShiftRight8(EmitContext& ctx, IR::Inst* inst) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
Xbyak::Xmm result = ctx.reg_alloc.UseScratchXmm(args[0]);
Xbyak::Xmm tmp = ctx.reg_alloc.ScratchXmm();
const u8 shift_amount = args[1].GetImmediateU8();
static void ArithmeticShiftRightByte(EmitContext& ctx, BlockOfCode& code, const Xbyak::Xmm& result, u8 shift_amount) {
const Xbyak::Xmm tmp = ctx.reg_alloc.ScratchXmm();
// TODO: Optimize
code.movdqa(tmp, result);
@@ -372,6 +368,15 @@ void EmitX64::EmitVectorArithmeticShiftRight8(EmitContext& ctx, IR::Inst* inst)
code.psllw(result, 8);
code.psrlw(tmp, 8);
code.por(result, tmp);
}
void EmitX64::EmitVectorArithmeticShiftRight8(EmitContext& ctx, IR::Inst* inst) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
const Xbyak::Xmm result = ctx.reg_alloc.UseScratchXmm(args[0]);
const u8 shift_amount = args[1].GetImmediateU8();
ArithmeticShiftRightByte(ctx, code, result, shift_amount);
ctx.reg_alloc.DefineValue(inst, result);
}
@@ -758,6 +763,92 @@ void EmitX64::EmitVectorGreaterS64(EmitContext& ctx, IR::Inst* inst) {
});
}
static void EmitVectorHalvingAddSigned(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]);
const Xbyak::Xmm tmp = ctx.reg_alloc.ScratchXmm();
code.movdqa(tmp, b);
code.pand(tmp, a);
code.pxor(a, b);
switch (esize) {
case 8:
ArithmeticShiftRightByte(ctx, code, a, 1);
code.paddb(a, tmp);
break;
case 16:
code.psraw(a, 1);
code.paddw(a, tmp);
break;
case 32:
code.psrad(a, 1);
code.paddd(a, tmp);
break;
}
ctx.reg_alloc.DefineValue(inst, a);
}
void EmitX64::EmitVectorHalvingAddS8(EmitContext& ctx, IR::Inst* inst) {
EmitVectorHalvingAddSigned(8, ctx, inst, code);
}
void EmitX64::EmitVectorHalvingAddS16(EmitContext& ctx, IR::Inst* inst) {
EmitVectorHalvingAddSigned(16, ctx, inst, code);
}
void EmitX64::EmitVectorHalvingAddS32(EmitContext& ctx, IR::Inst* inst) {
EmitVectorHalvingAddSigned(32, ctx, inst, code);
}
static void EmitVectorHalvingAddUnsigned(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]);
const Xbyak::Xmm tmp = ctx.reg_alloc.ScratchXmm();
code.movdqa(tmp, b);
switch (esize) {
case 8:
code.pavgb(tmp, a);
code.pxor(a, b);
code.pand(a, code.MConst(xword, 0x0101010101010101, 0x0101010101010101));
code.psubb(tmp, a);
break;
case 16:
code.pavgw(tmp, a);
code.pxor(a, b);
code.pand(a, code.MConst(xword, 0x0001000100010001, 0x0001000100010001));
code.psubw(tmp, a);
break;
case 32:
code.pand(tmp, a);
code.pxor(a, b);
code.psrld(a, 1);
code.paddd(tmp, a);
break;
}
ctx.reg_alloc.DefineValue(inst, tmp);
}
void EmitX64::EmitVectorHalvingAddU8(EmitContext& ctx, IR::Inst* inst) {
EmitVectorHalvingAddUnsigned(8, ctx, inst, code);
}
void EmitX64::EmitVectorHalvingAddU16(EmitContext& ctx, IR::Inst* inst) {
EmitVectorHalvingAddUnsigned(16, ctx, inst, code);
}
void EmitX64::EmitVectorHalvingAddU32(EmitContext& ctx, IR::Inst* inst) {
EmitVectorHalvingAddUnsigned(32, ctx, inst, code);
}
static void EmitVectorInterleaveLower(BlockOfCode& code, EmitContext& ctx, IR::Inst* inst, int size) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);