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shader_ir: Separate float-point comparisons in ordered and unordered

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This allows us to use native SPIR-V instructions without having to
manually check for NAN.
This commit is contained in:
ReinUsesLisp 2020-05-09 04:55:15 -03:00
parent 1121960f0e
commit 4e57f9d5cf
7 changed files with 163 additions and 135 deletions
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27
src/video_core/renderer_vulkan/vk_shader_decompiler.cpp
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@ -1618,6 +1618,24 @@ private:
return {};
}
Expression LogicalFOrdered(Operation operation) {
// Emulate SPIR-V's OpOrdered
const Id op_a = AsFloat(Visit(operation[0]));
const Id op_b = AsFloat(Visit(operation[1]));
const Id is_num_a = OpFOrdEqual(t_bool, op_a, op_a);
const Id is_num_b = OpFOrdEqual(t_bool, op_b, op_b);
return {OpLogicalAnd(t_bool, is_num_a, is_num_b), Type::Bool};
}
Expression LogicalFUnordered(Operation operation) {
// Emulate SPIR-V's OpUnordered
const Id op_a = AsFloat(Visit(operation[0]));
const Id op_b = AsFloat(Visit(operation[1]));
const Id is_nan_a = OpIsNan(t_bool, op_a);
const Id is_nan_b = OpIsNan(t_bool, op_b);
return {OpLogicalOr(t_bool, is_nan_a, is_nan_b), Type::Bool};
}
Id GetTextureSampler(Operation operation) {
const auto& meta = std::get<MetaTexture>(operation.GetMeta());
ASSERT(!meta.sampler.is_buffer);
@ -2511,7 +2529,14 @@ private:
&SPIRVDecompiler::Binary<&Module::OpFOrdGreaterThan, Type::Bool, Type::Float>,
&SPIRVDecompiler::Binary<&Module::OpFOrdNotEqual, Type::Bool, Type::Float>,
&SPIRVDecompiler::Binary<&Module::OpFOrdGreaterThanEqual, Type::Bool, Type::Float>,
&SPIRVDecompiler::Unary<&Module::OpIsNan, Type::Bool, Type::Float>,
&SPIRVDecompiler::LogicalFOrdered,
&SPIRVDecompiler::LogicalFUnordered,
&SPIRVDecompiler::Binary<&Module::OpFUnordLessThan, Type::Bool, Type::Float>,
&SPIRVDecompiler::Binary<&Module::OpFUnordEqual, Type::Bool, Type::Float>,
&SPIRVDecompiler::Binary<&Module::OpFUnordLessThanEqual, Type::Bool, Type::Float>,
&SPIRVDecompiler::Binary<&Module::OpFUnordGreaterThan, Type::Bool, Type::Float>,
&SPIRVDecompiler::Binary<&Module::OpFUnordNotEqual, Type::Bool, Type::Float>,
&SPIRVDecompiler::Binary<&Module::OpFUnordGreaterThanEqual, Type::Bool, Type::Float>,
&SPIRVDecompiler::Binary<&Module::OpSLessThan, Type::Bool, Type::Int>,
&SPIRVDecompiler::Binary<&Module::OpIEqual, Type::Bool, Type::Int>,