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spirv: Add lower fp16 to fp32 pass

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ReinUsesLisp 2021-02-19 18:10:18 -03:00 • committed by ameerj
parent 85cce78583
commit 6db69990da
32 changed files with 479 additions and 285 deletions
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12
src/shader_recompiler/ir_opt/constant_propagation_pass.cpp
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@ -104,12 +104,12 @@ void FoldGetPred(IR::Inst& inst) {
bool FoldXmadMultiply(IR::Block& block, IR::Inst& inst) {
/*
* We are looking for this pattern:
* %rhs_bfe = BitFieldUExtract %factor_a, #0, #16 (uses: 1)
* %rhs_mul = IMul32 %rhs_bfe, %factor_b (uses: 1)
* %lhs_bfe = BitFieldUExtract %factor_a, #16, #16 (uses: 1)
* %rhs_mul = IMul32 %lhs_bfe, %factor_b (uses: 1)
* %lhs_shl = ShiftLeftLogical32 %rhs_mul, #16 (uses: 1)
* %result = IAdd32 %lhs_shl, %rhs_mul (uses: 10)
* %rhs_bfe = BitFieldUExtract %factor_a, #0, #16
* %rhs_mul = IMul32 %rhs_bfe, %factor_b
* %lhs_bfe = BitFieldUExtract %factor_a, #16, #16
* %rhs_mul = IMul32 %lhs_bfe, %factor_b
* %lhs_shl = ShiftLeftLogical32 %rhs_mul, #16
* %result = IAdd32 %lhs_shl, %rhs_mul
*
* And replacing it with
* %result = IMul32 %factor_a, %factor_b