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Like, really fixing SELECT. Frogger now runs ^_^

This commit is contained in:
Ben Vanik 2014-05-31 08:06:04 -07:00
parent 002aaab77d
commit 430d827770
1 changed files with 29 additions and 23 deletions
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52
src/alloy/backend/x64/x64_sequences.cc
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@ -1952,6 +1952,8 @@ EMITTER_OPCODE_TABLE(
// OPCODE_SELECT
// ============================================================================
// dest = src1 ? src2 : src3
// TODO(benvanik): match compare + select sequences, as often it's something
// like SELECT(VECTOR_COMPARE_SGE(a, b), a, b)
EMITTER(SELECT_I8, MATCH(I<OPCODE_SELECT, I8<>, I8<>, I8<>, I8<>>)) {
static void Emit(X64Emitter& e, const EmitArgType& i) {
e.test(i.src1, i.src1);
@ -1982,37 +1984,41 @@ EMITTER(SELECT_I64, MATCH(I<OPCODE_SELECT, I64<>, I8<>, I64<>, I64<>>)) {
};
EMITTER(SELECT_F32, MATCH(I<OPCODE_SELECT, F32<>, I8<>, F32<>, F32<>>)) {
static void Emit(X64Emitter& e, const EmitArgType& i) {
e.test(i.src1, i.src1);
// TODO(benvanik): find a way to do this without branches.
// We may be able to load src1 into an xmm, cmp with zero, and use that
// as a selection mask to choose between src2 & src3.
Xbyak::Label skip;
e.vmovaps(i.dest, i.src3);
e.jz(skip);
e.vmovaps(i.dest, i.src2);
e.L(skip);
// TODO(benvanik): find a shorter sequence.
// xmm0 = src1 != 0 ? 1111... : 0000....
e.movzx(e.eax, i.src1);
e.vmovd(e.xmm1, e.eax);
e.vxorps(e.xmm0, e.xmm0);
e.vcmpneqss(e.xmm0, e.xmm1);
e.vpand(e.xmm1, e.xmm0, i.src2);
e.vpandn(i.dest, e.xmm0, i.src3);
e.vpor(i.dest, e.xmm1);
}
};
EMITTER(SELECT_F64, MATCH(I<OPCODE_SELECT, F64<>, I8<>, F64<>, F64<>>)) {
static void Emit(X64Emitter& e, const EmitArgType& i) {
e.test(i.src1, i.src1);
// TODO(benvanik): find a way to do this without branches.
Xbyak::Label skip;
e.vmovaps(i.dest, i.src3);
e.jz(skip);
e.vmovaps(i.dest, i.src2);
e.L(skip);
// xmm0 = src1 != 0 ? 1111... : 0000....
e.movzx(e.eax, i.src1);
e.vmovd(e.xmm1, e.eax);
e.vxorpd(e.xmm0, e.xmm0);
e.vcmpneqsd(e.xmm0, e.xmm1);
e.vpand(e.xmm1, e.xmm0, i.src2);
e.vpandn(i.dest, e.xmm0, i.src3);
e.vpor(i.dest, e.xmm1);
}
};
EMITTER(SELECT_V128, MATCH(I<OPCODE_SELECT, V128<>, I8<>, V128<>, V128<>>)) {
static void Emit(X64Emitter& e, const EmitArgType& i) {
e.test(i.src1, i.src1);
// TODO(benvanik): find a way to do this without branches.
Xbyak::Label skip;
e.vmovaps(i.dest, i.src3);
e.jz(skip);
e.vmovaps(i.dest, i.src2);
e.L(skip);
// TODO(benvanik): find a shorter sequence.
// xmm0 = src1 != 0 ? 1111... : 0000....
e.movzx(e.eax, i.src1);
e.vmovd(e.xmm1, e.eax);
e.vpbroadcastd(e.xmm1, e.xmm1);
e.vxorps(e.xmm0, e.xmm0);
e.vcmpneqps(e.xmm0, e.xmm1);
e.vpand(e.xmm1, e.xmm0, i.src2);
e.vpandn(i.dest, e.xmm0, i.src3);
e.vpor(i.dest, e.xmm1);
}
};
EMITTER_OPCODE_TABLE(