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shader_jit_a64_compiler: Improve MAX, MIN (#7137)

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merry 2023-11-11 12:57:01 +00:00 committed by GitHub
parent 80213bf88f
commit 271218b733
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1 changed files with 4 additions and 14 deletions
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18
src/video_core/shader/shader_jit_a64_compiler.cpp
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@ -548,13 +548,8 @@ void JitShader::Compile_MAX(Instruction instr) {
Compile_SwizzleSrc(instr, 1, instr.common.src1, SRC1); Compile_SwizzleSrc(instr, 1, instr.common.src1, SRC1);
Compile_SwizzleSrc(instr, 2, instr.common.src2, SRC2); Compile_SwizzleSrc(instr, 2, instr.common.src2, SRC2);
// VSCRATCH0 = Ordinal(SRC1) // Equivalent to (b < a) ? a : b with associated NaN caveats
FCMEQ(VSCRATCH0.S4(), SRC1.S4(), SRC1.S4()); FCMGT(VSCRATCH0.S4(), SRC1.S4(), SRC2.S4());
// FMAX will always pick the NaN
FMAX(SRC1.S4(), SRC1.S4(), SRC2.S4());
// In the case of NaN, pick SRC2
BIF(SRC1.B16(), SRC2.B16(), VSCRATCH0.B16()); BIF(SRC1.B16(), SRC2.B16(), VSCRATCH0.B16());
Compile_DestEnable(instr, SRC1); Compile_DestEnable(instr, SRC1);
@ -564,13 +559,8 @@ void JitShader::Compile_MIN(Instruction instr) {
Compile_SwizzleSrc(instr, 1, instr.common.src1, SRC1); Compile_SwizzleSrc(instr, 1, instr.common.src1, SRC1);
Compile_SwizzleSrc(instr, 2, instr.common.src2, SRC2); Compile_SwizzleSrc(instr, 2, instr.common.src2, SRC2);
// VSCRATCH0 = Ordinal(SRC1) // Equivalent to (a < b) ? a : b with associated NaN caveats
FCMEQ(VSCRATCH0.S4(), SRC1.S4(), SRC1.S4()); FCMGT(VSCRATCH0.S4(), SRC2.S4(), SRC1.S4());
// FMIN will always pick the NaN
FMIN(SRC1.S4(), SRC1.S4(), SRC2.S4());
// In the case of NaN, pick SRC2
BIF(SRC1.B16(), SRC2.B16(), VSCRATCH0.B16()); BIF(SRC1.B16(), SRC2.B16(), VSCRATCH0.B16());
Compile_DestEnable(instr, SRC1); Compile_DestEnable(instr, SRC1);