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shader: Implement TLD4 and TLD4_B

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FernandoS27 2021-03-24 23:41:55 +01:00 • committed by ameerj
parent 32c5483beb
commit c7c518e280
13 changed files with 315 additions and 11 deletions
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12
src/shader_recompiler/ir_opt/constant_propagation_pass.cpp
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@ -403,6 +403,18 @@ void ConstantPropagation(IR::Block& block, IR::Inst& inst) {
return (base >> shift) & ((1U << count) - 1);
});
return;
case IR::Opcode::BitFieldSExtract:
FoldWhenAllImmediates(inst, [](s32 base, u32 shift, u32 count) {
const size_t back_shift = static_cast<size_t>(shift) + static_cast<size_t>(count);
if (back_shift > Common::BitSize<s32>()) {
throw LogicError("Undefined result in {}({}, {}, {})", IR::Opcode::BitFieldSExtract,
base, shift, count);
}
const size_t left_shift = Common::BitSize<s32>() - back_shift;
return static_cast<u32>(static_cast<s32>(base << left_shift) >>
static_cast<size_t>(Common::BitSize<s32>() - count));
});
return;
case IR::Opcode::BranchConditional:
return FoldBranchConditional(inst);
default: