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shader_jit: Add optimizations up to x86-64-v4 (#6668)
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@ -338,15 +338,39 @@ void JitShader::Compile_SanitizedMul(Xmm src1, Xmm src2, Xmm scratch) {
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// where neither source was, this NaN was generated by a 0 * inf multiplication, and so the
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// result should be transformed to 0 to match PICA fp rules.
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if (host_caps.has(Cpu::tAVX512F | Cpu::tAVX512VL | Cpu::tAVX512DQ)) {
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vmulps(scratch, src1, src2);
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// Mask of any NaN values found in the result
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const Xbyak::Opmask zero_mask = k1;
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vcmpunordps(zero_mask, scratch, scratch);
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// Mask of any non-NaN inputs producing NaN results
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vcmpordps(zero_mask | zero_mask, src1, src2);
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knotb(zero_mask, zero_mask);
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vmovaps(src1 | zero_mask | T_z, scratch);
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return;
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}
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// Set scratch to mask of (src1 != NaN and src2 != NaN)
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movaps(scratch, src1);
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cmpordps(scratch, src2);
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if (host_caps.has(Cpu::tAVX)) {
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vcmpordps(scratch, src1, src2);
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} else {
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movaps(scratch, src1);
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cmpordps(scratch, src2);
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}
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mulps(src1, src2);
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// Set src2 to mask of (result == NaN)
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movaps(src2, src1);
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cmpunordps(src2, src2);
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if (host_caps.has(Cpu::tAVX)) {
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vcmpunordps(src2, src2, src1);
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} else {
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movaps(src2, src1);
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cmpunordps(src2, src2);
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}
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// Clear components where scratch != src2 (i.e. if result is NaN where neither source was NaN)
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xorps(scratch, src2);
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@ -406,13 +430,20 @@ void JitShader::Compile_DP3(Instruction instr) {
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Compile_SanitizedMul(SRC1, SRC2, SCRATCH);
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movaps(SRC2, SRC1);
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shufps(SRC2, SRC2, _MM_SHUFFLE(1, 1, 1, 1));
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if (host_caps.has(Cpu::tAVX)) {
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vshufps(SRC3, SRC1, SRC1, _MM_SHUFFLE(2, 2, 2, 2));
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vshufps(SRC2, SRC1, SRC1, _MM_SHUFFLE(1, 1, 1, 1));
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vshufps(SRC1, SRC1, SRC1, _MM_SHUFFLE(0, 0, 0, 0));
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} else {
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movaps(SRC2, SRC1);
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shufps(SRC2, SRC2, _MM_SHUFFLE(1, 1, 1, 1));
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movaps(SRC3, SRC1);
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shufps(SRC3, SRC3, _MM_SHUFFLE(2, 2, 2, 2));
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movaps(SRC3, SRC1);
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shufps(SRC3, SRC3, _MM_SHUFFLE(2, 2, 2, 2));
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shufps(SRC1, SRC1, _MM_SHUFFLE(0, 0, 0, 0));
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}
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shufps(SRC1, SRC1, _MM_SHUFFLE(0, 0, 0, 0));
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addps(SRC1, SRC2);
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addps(SRC1, SRC3);
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@ -589,9 +620,15 @@ void JitShader::Compile_MOV(Instruction instr) {
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void JitShader::Compile_RCP(Instruction instr) {
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Compile_SwizzleSrc(instr, 1, instr.common.src1, SRC1);
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// TODO(bunnei): RCPSS is a pretty rough approximation, this might cause problems if Pica
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// performs this operation more accurately. This should be checked on hardware.
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rcpss(SRC1, SRC1);
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if (host_caps.has(Cpu::tAVX512F | Cpu::tAVX512VL)) {
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// Accurate to 14 bits of precisions rather than 12 bits of rcpss
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vrcp14ss(SRC1, SRC1, SRC1);
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} else {
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// TODO(bunnei): RCPSS is a pretty rough approximation, this might cause problems if Pica
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// performs this operation more accurately. This should be checked on hardware.
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rcpss(SRC1, SRC1);
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}
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shufps(SRC1, SRC1, _MM_SHUFFLE(0, 0, 0, 0)); // XYWZ -> XXXX
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Compile_DestEnable(instr, SRC1);
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@ -600,9 +637,15 @@ void JitShader::Compile_RCP(Instruction instr) {
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void JitShader::Compile_RSQ(Instruction instr) {
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Compile_SwizzleSrc(instr, 1, instr.common.src1, SRC1);
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// TODO(bunnei): RSQRTSS is a pretty rough approximation, this might cause problems if Pica
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// performs this operation more accurately. This should be checked on hardware.
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rsqrtss(SRC1, SRC1);
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if (host_caps.has(Cpu::tAVX512F | Cpu::tAVX512VL)) {
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// Accurate to 14 bits of precisions rather than 12 bits of rsqrtss
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vrsqrt14ss(SRC1, SRC1, SRC1);
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} else {
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// TODO(bunnei): RSQRTSS is a pretty rough approximation, this might cause problems if Pica
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// performs this operation more accurately. This should be checked on hardware.
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rsqrtss(SRC1, SRC1);
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}
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shufps(SRC1, SRC1, _MM_SHUFFLE(0, 0, 0, 0)); // XYWZ -> XXXX
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Compile_DestEnable(instr, SRC1);
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@ -1050,32 +1093,47 @@ Xbyak::Label JitShader::CompilePrelude_Log2() {
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jp(input_is_nan);
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jae(input_out_of_range);
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// Split input
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movd(eax, SRC1);
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mov(edx, eax);
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and_(eax, 0x7f800000);
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and_(edx, 0x007fffff);
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movss(SCRATCH, xword[rip + c0]); // Preload c0.
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or_(edx, 0x3f800000);
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movd(SRC1, edx);
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// SRC1 now contains the mantissa of the input.
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mulss(SCRATCH, SRC1);
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shr(eax, 23);
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sub(eax, 0x7f);
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cvtsi2ss(SCRATCH2, eax);
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// SCRATCH2 now contains the exponent of the input.
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// Split input: SRC1=MANT[1,2) SCRATCH2=Exponent
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if (host_caps.has(Cpu::tAVX512F | Cpu::tAVX512VL)) {
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vgetexpss(SCRATCH2, SRC1, SRC1);
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vgetmantss(SRC1, SRC1, SRC1, 0x0'0);
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} else {
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movd(eax, SRC1);
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mov(edx, eax);
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and_(eax, 0x7f800000);
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and_(edx, 0x007fffff);
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or_(edx, 0x3f800000);
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movd(SRC1, edx);
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// SRC1 now contains the mantissa of the input.
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shr(eax, 23);
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sub(eax, 0x7f);
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cvtsi2ss(SCRATCH2, eax);
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// SCRATCH2 now contains the exponent of the input.
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}
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movss(SCRATCH, xword[rip + c0]);
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// Complete computation of polynomial
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addss(SCRATCH, xword[rip + c1]);
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mulss(SCRATCH, SRC1);
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addss(SCRATCH, xword[rip + c2]);
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mulss(SCRATCH, SRC1);
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addss(SCRATCH, xword[rip + c3]);
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mulss(SCRATCH, SRC1);
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subss(SRC1, ONE);
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addss(SCRATCH, xword[rip + c4]);
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mulss(SCRATCH, SRC1);
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addss(SCRATCH2, SCRATCH);
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if (host_caps.has(Cpu::tFMA)) {
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vfmadd213ss(SCRATCH, SRC1, xword[rip + c1]);
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vfmadd213ss(SCRATCH, SRC1, xword[rip + c2]);
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vfmadd213ss(SCRATCH, SRC1, xword[rip + c3]);
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vfmadd213ss(SCRATCH, SRC1, xword[rip + c4]);
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subss(SRC1, ONE);
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vfmadd231ss(SCRATCH2, SCRATCH, SRC1);
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} else {
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mulss(SCRATCH, SRC1);
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addss(SCRATCH, xword[rip + c1]);
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mulss(SCRATCH, SRC1);
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addss(SCRATCH, xword[rip + c2]);
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mulss(SCRATCH, SRC1);
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addss(SCRATCH, xword[rip + c3]);
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mulss(SCRATCH, SRC1);
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subss(SRC1, ONE);
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addss(SCRATCH, xword[rip + c4]);
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mulss(SCRATCH, SRC1);
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addss(SCRATCH2, SCRATCH);
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}
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// Duplicate result across vector
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xorps(SRC1, SRC1); // break dependency chain
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@ -1122,33 +1180,69 @@ Xbyak::Label JitShader::CompilePrelude_Exp2() {
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// Handle edge cases
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ucomiss(SRC1, SRC1);
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jp(ret_label);
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// Clamp to maximum range since we shift the value directly into the exponent.
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minss(SRC1, xword[rip + input_max]);
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maxss(SRC1, xword[rip + input_min]);
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// Decompose input
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movss(SCRATCH, SRC1);
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movss(SCRATCH2, xword[rip + c0]); // Preload c0.
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subss(SCRATCH, xword[rip + half]);
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cvtss2si(eax, SCRATCH);
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cvtsi2ss(SCRATCH, eax);
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// SCRATCH now contains input rounded to the nearest integer.
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add(eax, 0x7f);
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subss(SRC1, SCRATCH);
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// SRC1 contains input - round(input), which is in [-0.5, 0.5).
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mulss(SCRATCH2, SRC1);
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shl(eax, 23);
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movd(SCRATCH, eax);
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// SCRATCH contains 2^(round(input)).
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// Decompose input:
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// SCRATCH=2^round(input)
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// SRC1=input-round(input) [-0.5, 0.5)
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if (host_caps.has(Cpu::tAVX512F | Cpu::tAVX512VL)) {
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// input - 0.5
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vsubss(SCRATCH, SRC1, xword[rip + half]);
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// trunc(input - 0.5)
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vrndscaless(SCRATCH2, SCRATCH, SCRATCH, _MM_FROUND_TRUNC);
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// SCRATCH = 1 * 2^(trunc(input - 0.5))
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vscalefss(SCRATCH, ONE, SCRATCH2);
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// SRC1 = input-trunc(input - 0.5)
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vsubss(SRC1, SRC1, SCRATCH2);
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} else {
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// Clamp to maximum range since we shift the value directly into the exponent.
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minss(SRC1, xword[rip + input_max]);
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maxss(SRC1, xword[rip + input_min]);
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if (host_caps.has(Cpu::tAVX)) {
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vsubss(SCRATCH, SRC1, xword[rip + half]);
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} else {
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movss(SCRATCH, SRC1);
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subss(SCRATCH, xword[rip + half]);
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}
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if (host_caps.has(Cpu::tSSE41)) {
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roundss(SCRATCH, SCRATCH, _MM_FROUND_TRUNC);
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cvtss2si(eax, SCRATCH);
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} else {
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cvtss2si(eax, SCRATCH);
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cvtsi2ss(SCRATCH, eax);
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}
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// SCRATCH now contains input rounded to the nearest integer.
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add(eax, 0x7f);
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subss(SRC1, SCRATCH);
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// SRC1 contains input - round(input), which is in [-0.5, 0.5).
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shl(eax, 23);
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movd(SCRATCH, eax);
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// SCRATCH contains 2^(round(input)).
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}
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// Complete computation of polynomial.
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addss(SCRATCH2, xword[rip + c1]);
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mulss(SCRATCH2, SRC1);
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addss(SCRATCH2, xword[rip + c2]);
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mulss(SCRATCH2, SRC1);
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addss(SCRATCH2, xword[rip + c3]);
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mulss(SRC1, SCRATCH2);
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addss(SRC1, xword[rip + c4]);
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movss(SCRATCH2, xword[rip + c0]);
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if (host_caps.has(Cpu::tFMA)) {
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vfmadd213ss(SCRATCH2, SRC1, xword[rip + c1]);
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vfmadd213ss(SCRATCH2, SRC1, xword[rip + c2]);
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vfmadd213ss(SCRATCH2, SRC1, xword[rip + c3]);
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vfmadd213ss(SRC1, SCRATCH2, xword[rip + c4]);
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} else {
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mulss(SCRATCH2, SRC1);
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addss(SCRATCH2, xword[rip + c1]);
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mulss(SCRATCH2, SRC1);
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addss(SCRATCH2, xword[rip + c2]);
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mulss(SCRATCH2, SRC1);
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addss(SCRATCH2, xword[rip + c3]);
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mulss(SRC1, SCRATCH2);
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addss(SRC1, xword[rip + c4]);
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}
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mulss(SRC1, SCRATCH);
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// Duplicate result across vector
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