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x64 JIT: Simplify splats

This commit is contained in:
Dr. Chat 2017-08-05 12:06:21 -05:00
parent ee18d548c9
commit 8d261ca73d
1 changed files with 27 additions and 48 deletions
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39
src/xenia/cpu/backend/x64/x64_sequences.cc
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@ -6547,24 +6547,17 @@ EMITTER_OPCODE_TABLE(OPCODE_EXTRACT, EXTRACT_I8, EXTRACT_I16, EXTRACT_I32);
// Copy a value into all elements of a vector
struct SPLAT_I8 : Sequence<SPLAT_I8, I<OPCODE_SPLAT, V128Op, I8Op>> {
static void Emit(X64Emitter& e, const EmitArgType& i) {
if (e.IsFeatureEnabled(kX64EmitAVX2)) {
if (i.src1.is_constant) {
// TODO(benvanik): faster constant splats.
e.mov(e.al, i.src1.constant());
e.vmovd(e.xmm0, e.eax);
e.vpbroadcastb(i.dest, e.xmm0);
} else {
e.vmovd(e.xmm0, i.src1.reg().cvt32());
e.vpbroadcastb(i.dest, e.xmm0);
}
} else {
if (i.src1.is_constant) {
e.mov(e.eax, i.src1.constant());
e.vmovd(e.xmm0, e.eax);
} else {
e.vmovd(e.xmm0, i.src1.reg().cvt32());
}
if (e.IsFeatureEnabled(kX64EmitAVX2)) {
e.vpbroadcastb(i.dest, e.xmm0);
} else {
e.vpunpcklbw(e.xmm0, e.xmm0);
e.vpunpcklwd(e.xmm0, e.xmm0);
e.vpshufd(i.dest, e.xmm0, 0);
@ -6573,24 +6566,17 @@ struct SPLAT_I8 : Sequence<SPLAT_I8, I<OPCODE_SPLAT, V128Op, I8Op>> {
};
struct SPLAT_I16 : Sequence<SPLAT_I16, I<OPCODE_SPLAT, V128Op, I16Op>> {
static void Emit(X64Emitter& e, const EmitArgType& i) {
if (e.IsFeatureEnabled(kX64EmitAVX2)) {
if (i.src1.is_constant) {
// TODO(benvanik): faster constant splats.
e.mov(e.ax, i.src1.constant());
e.vmovd(e.xmm0, e.eax);
e.vpbroadcastw(i.dest, e.xmm0);
} else {
e.vmovd(e.xmm0, i.src1.reg().cvt32());
e.vpbroadcastw(i.dest, e.xmm0);
}
} else {
if (i.src1.is_constant) {
e.mov(e.eax, i.src1.constant());
e.vmovd(e.xmm0, e.eax);
} else {
e.vmovd(e.xmm0, i.src1.reg().cvt32());
}
if (e.IsFeatureEnabled(kX64EmitAVX2)) {
e.vpbroadcastw(i.dest, e.xmm0);
} else {
e.vpunpcklwd(e.xmm0, e.xmm0); // unpack low word data
e.vpshufd(i.dest, e.xmm0, 0);
}
@ -6598,24 +6584,17 @@ struct SPLAT_I16 : Sequence<SPLAT_I16, I<OPCODE_SPLAT, V128Op, I16Op>> {
};
struct SPLAT_I32 : Sequence<SPLAT_I32, I<OPCODE_SPLAT, V128Op, I32Op>> {
static void Emit(X64Emitter& e, const EmitArgType& i) {
if (e.IsFeatureEnabled(kX64EmitAVX2)) {
if (i.src1.is_constant) {
// TODO(benvanik): faster constant splats.
e.mov(e.eax, i.src1.constant());
e.vmovd(e.xmm0, e.eax);
e.vpbroadcastd(i.dest, e.xmm0);
} else {
e.vmovd(e.xmm0, i.src1);
e.vpbroadcastd(i.dest, e.xmm0);
}
} else {
if (i.src1.is_constant) {
e.mov(e.eax, i.src1.constant());
e.vmovd(e.xmm0, e.eax);
} else {
e.vmovd(e.xmm0, i.src1.reg().cvt32());
}
if (e.IsFeatureEnabled(kX64EmitAVX2)) {
e.vpbroadcastd(i.dest, e.xmm0);
} else {
e.vpshufd(i.dest, e.xmm0, 0);
}
}