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IR: Implement VectorLogicalShiftRight

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This commit is contained in:
MerryMage 2018-02-10 11:05:22 +00:00
parent 7ff280827b
commit b22c5961f9
4 changed files with 73 additions and 0 deletions
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53
src/backend_x64/emit_x64_vector.cpp
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@ -634,6 +634,59 @@ void EmitX64::EmitVectorLogicalShiftLeft64(EmitContext& ctx, IR::Inst* inst) {
ctx.reg_alloc.DefineValue(inst, result);
}
void EmitX64::EmitVectorLogicalShiftRight8(EmitContext& ctx, IR::Inst* inst) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
Xbyak::Xmm result = ctx.reg_alloc.UseScratchXmm(args[0]);
Xbyak::Xmm zeros = ctx.reg_alloc.ScratchXmm();
Xbyak::Xmm mask = ctx.reg_alloc.ScratchXmm();
const u8 shift_amount = args[1].GetImmediateU8();
// TODO: Optimize
code.pcmpeqb(mask, mask); // mask = 0xFF
code.paddb(mask, mask); // mask = 0xFE
code.pxor(zeros, zeros);
for (size_t i = 0; i < shift_amount; ++i) {
code.pand(result, mask);
code.pavgb(result, zeros);
}
ctx.reg_alloc.DefineValue(inst, result);
}
void EmitX64::EmitVectorLogicalShiftRight16(EmitContext& ctx, IR::Inst* inst) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
Xbyak::Xmm result = ctx.reg_alloc.UseScratchXmm(args[0]);
const u8 shift_amount = args[1].GetImmediateU8();
code.psrlw(result, shift_amount);
ctx.reg_alloc.DefineValue(inst, result);
}
void EmitX64::EmitVectorLogicalShiftRight32(EmitContext& ctx, IR::Inst* inst) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
Xbyak::Xmm result = ctx.reg_alloc.UseScratchXmm(args[0]);
const u8 shift_amount = args[1].GetImmediateU8();
code.psrld(result, shift_amount);
ctx.reg_alloc.DefineValue(inst, result);
}
void EmitX64::EmitVectorLogicalShiftRight64(EmitContext& ctx, IR::Inst* inst) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
Xbyak::Xmm result = ctx.reg_alloc.UseScratchXmm(args[0]);
const u8 shift_amount = args[1].GetImmediateU8();
code.psrlq(result, shift_amount);
ctx.reg_alloc.DefineValue(inst, result);
}
static void EmitVectorZeroExtend(BlockOfCode& code, EmitContext& ctx, IR::Inst* inst, int size) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);