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IR: Implement VectorPopulationCount

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This commit is contained in:
MerryMage 2018-02-11 11:43:51 +00:00
parent 1dd2b33b87
commit 303088a51e
4 changed files with 40 additions and 0 deletions
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34
src/backend_x64/emit_x64_vector.cpp
View file

@ -8,6 +8,7 @@
#include "backend_x64/block_of_code.h"
#include "backend_x64/emit_x64.h"
#include "common/assert.h"
#include "common/bit_util.h"
#include "common/common_types.h"
#include "common/mp.h"
#include "frontend/ir/basic_block.h"
@ -882,6 +883,39 @@ void EmitX64::EmitVectorPairedAdd64(EmitContext& ctx, IR::Inst* inst) {
ctx.reg_alloc.DefineValue(inst, a);
}
void EmitX64::EmitVectorPopulationCount(EmitContext& ctx, IR::Inst* inst) {
if (code.DoesCpuSupport(Xbyak::util::Cpu::tSSSE3)) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
Xbyak::Xmm low_a = ctx.reg_alloc.UseScratchXmm(args[0]);
Xbyak::Xmm high_a = ctx.reg_alloc.ScratchXmm();
Xbyak::Xmm tmp1 = ctx.reg_alloc.ScratchXmm();
Xbyak::Xmm tmp2 = ctx.reg_alloc.ScratchXmm();
code.movdqa(high_a, low_a);
code.psrlw(high_a, 4);
code.movdqa(tmp1, code.MConst(0x0F0F0F0F0F0F0F0F, 0x0F0F0F0F0F0F0F0F));
code.pand(high_a, tmp1); // High nibbles
code.pand(low_a, tmp1); // Low nibbles
code.movdqa(tmp1, code.MConst(0x0302020102010100, 0x0403030203020201));
code.movdqa(tmp2, tmp1);
code.pshufb(tmp1, low_a);
code.pshufb(tmp2, high_a);
code.paddb(tmp1, tmp2);
ctx.reg_alloc.DefineValue(inst, tmp1);
return;
}
EmitTwoArgumentFallback(code, ctx, inst, [](std::array<u8, 16>& result, const std::array<u8, 16>& a){
for (size_t i = 0; i < 16; ++i) {
result[i] = static_cast<u8>(Common::BitCount(a[i]));
}
});
}
void EmitX64::EmitVectorSub8(EmitContext& ctx, IR::Inst* inst) {
EmitVectorOperation(code, ctx, inst, &Xbyak::CodeGenerator::psubb);
}

4
src/frontend/ir/ir_emitter.cpp
View file

@ -977,6 +977,10 @@ U128 IREmitter::VectorPairedAdd(size_t esize, const U128& a, const U128& b) {
return {};
}
U128 IREmitter::VectorPopulationCount(const U128& a) {
return Inst<U128>(Opcode::VectorPopulationCount, a);
}
U128 IREmitter::VectorSub(size_t esize, const U128& a, const U128& b) {
switch (esize) {
case 8:

1
src/frontend/ir/ir_emitter.h
View file

@ -223,6 +223,7 @@ public:
U128 VectorOr(const U128& a, const U128& b);
U128 VectorPairedAdd(size_t esize, const U128& a, const U128& b);
U128 VectorPairedAddLower(size_t esize, const U128& a, const U128& b);
U128 VectorPopulationCount(const U128& a);
U128 VectorSub(size_t esize, const U128& a, const U128& b);
U128 VectorZeroExtend(size_t original_esize, const U128& a);
U128 VectorZeroUpper(const U128& a);

1
src/frontend/ir/opcodes.inc
View file

@ -248,6 +248,7 @@ OPCODE(VectorPairedAdd8, T::U128, T::U128, T::U128
OPCODE(VectorPairedAdd16, T::U128, T::U128, T::U128 )
OPCODE(VectorPairedAdd32, T::U128, T::U128, T::U128 )
OPCODE(VectorPairedAdd64, T::U128, T::U128, T::U128 )
OPCODE(VectorPopulationCount, T::U128, T::U128 )
OPCODE(VectorSub8, T::U128, T::U128, T::U128 )
OPCODE(VectorSub16, T::U128, T::U128, T::U128 )
OPCODE(VectorSub32, T::U128, T::U128, T::U128 )