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renderer_opengl: Implement half float NaN comparisons

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This commit is contained in:
ReinUsesLisp 2019-04-09 17:33:48 -03:00
parent ae46ad48ed
commit acf618afbc
3 changed files with 59 additions and 36 deletions
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60
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
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@ -1173,34 +1173,46 @@ private:
return GenerateUnary(operation, "any", Type::Bool, Type::Bool2);
}
template <bool with_nan>
std::string GenerateHalfComparison(Operation operation, std::string compare_op) {
std::string comparison{GenerateBinaryCall(operation, compare_op, Type::Bool2,
Type::HalfFloat, Type::HalfFloat)};
if constexpr (!with_nan) {
return comparison;
}
return "halfFloatNanComparison(" + comparison + ", " +
VisitOperand(operation, 0, Type::HalfFloat) + ", " +
VisitOperand(operation, 1, Type::HalfFloat) + ')';
}
template <bool with_nan>
std::string Logical2HLessThan(Operation operation) {
return GenerateBinaryCall(operation, "lessThan", Type::Bool2, Type::HalfFloat,
Type::HalfFloat);
return GenerateHalfComparison<with_nan>(operation, "lessThan");
}
template <bool with_nan>
std::string Logical2HEqual(Operation operation) {
return GenerateBinaryCall(operation, "equal", Type::Bool2, Type::HalfFloat,
Type::HalfFloat);
return GenerateHalfComparison<with_nan>(operation, "equal");
}
template <bool with_nan>
std::string Logical2HLessEqual(Operation operation) {
return GenerateBinaryCall(operation, "lessThanEqual", Type::Bool2, Type::HalfFloat,
Type::HalfFloat);
return GenerateHalfComparison<with_nan>(operation, "lessThanEqual");
}
template <bool with_nan>
std::string Logical2HGreaterThan(Operation operation) {
return GenerateBinaryCall(operation, "greaterThan", Type::Bool2, Type::HalfFloat,
Type::HalfFloat);
return GenerateHalfComparison<with_nan>(operation, "greaterThan");
}
template <bool with_nan>
std::string Logical2HNotEqual(Operation operation) {
return GenerateBinaryCall(operation, "notEqual", Type::Bool2, Type::HalfFloat,
Type::HalfFloat);
return GenerateHalfComparison<with_nan>(operation, "notEqual");
}
template <bool with_nan>
std::string Logical2HGreaterEqual(Operation operation) {
return GenerateBinaryCall(operation, "greaterThanEqual", Type::Bool2, Type::HalfFloat,
Type::HalfFloat);
return GenerateHalfComparison<with_nan>(operation, "greaterThanEqual");
}
std::string Texture(Operation operation) {
@ -1525,12 +1537,18 @@ private:
&GLSLDecompiler::LogicalNotEqual<Type::Uint>,
&GLSLDecompiler::LogicalGreaterEqual<Type::Uint>,
&GLSLDecompiler::Logical2HLessThan,
&GLSLDecompiler::Logical2HEqual,
&GLSLDecompiler::Logical2HLessEqual,
&GLSLDecompiler::Logical2HGreaterThan,
&GLSLDecompiler::Logical2HNotEqual,
&GLSLDecompiler::Logical2HGreaterEqual,
&GLSLDecompiler::Logical2HLessThan<false>,
&GLSLDecompiler::Logical2HEqual<false>,
&GLSLDecompiler::Logical2HLessEqual<false>,
&GLSLDecompiler::Logical2HGreaterThan<false>,
&GLSLDecompiler::Logical2HNotEqual<false>,
&GLSLDecompiler::Logical2HGreaterEqual<false>,
&GLSLDecompiler::Logical2HLessThan<true>,
&GLSLDecompiler::Logical2HEqual<true>,
&GLSLDecompiler::Logical2HLessEqual<true>,
&GLSLDecompiler::Logical2HGreaterThan<true>,
&GLSLDecompiler::Logical2HNotEqual<true>,
&GLSLDecompiler::Logical2HGreaterEqual<true>,
&GLSLDecompiler::Texture,
&GLSLDecompiler::TextureLod,
@ -1633,6 +1651,12 @@ std::string GetCommonDeclarations() {
"}\n\n"
"vec2 toHalf2(float value) {\n"
" return unpackHalf2x16(ftou(value));\n"
"}\n\n"
"bvec2 halfFloatNanComparison(bvec2 comparison, vec2 pair1, vec2 pair2) {\n"
" bvec2 is_nan1 = isnan(pair1);\n"
" bvec2 is_nan2 = isnan(pair2);\n"
" return bvec2(comparison.x || is_nan1.x || is_nan2.x, comparison.y || is_nan1.y || "
"is_nan2.y);\n"
"}\n";
}

17
src/video_core/shader/shader_ir.cpp
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@ -285,13 +285,6 @@ Node ShaderIR::GetPredicateComparisonInteger(PredCondition condition, bool is_si
Node ShaderIR::GetPredicateComparisonHalf(Tegra::Shader::PredCondition condition,
const MetaHalfArithmetic& meta, Node op_a, Node op_b) {
UNIMPLEMENTED_IF_MSG(condition == PredCondition::LessThanWithNan ||
condition == PredCondition::NotEqualWithNan ||
condition == PredCondition::LessEqualWithNan ||
condition == PredCondition::GreaterThanWithNan ||
condition == PredCondition::GreaterEqualWithNan,
"Unimplemented NaN comparison for half floats");
const std::unordered_map<PredCondition, OperationCode> PredicateComparisonTable = {
{PredCondition::LessThan, OperationCode::Logical2HLessThan},
{PredCondition::Equal, OperationCode::Logical2HEqual},
@ -299,11 +292,11 @@ Node ShaderIR::GetPredicateComparisonHalf(Tegra::Shader::PredCondition condition
{PredCondition::GreaterThan, OperationCode::Logical2HGreaterThan},
{PredCondition::NotEqual, OperationCode::Logical2HNotEqual},
{PredCondition::GreaterEqual, OperationCode::Logical2HGreaterEqual},
{PredCondition::LessThanWithNan, OperationCode::Logical2HLessThan},
{PredCondition::NotEqualWithNan, OperationCode::Logical2HNotEqual},
{PredCondition::LessEqualWithNan, OperationCode::Logical2HLessEqual},
{PredCondition::GreaterThanWithNan, OperationCode::Logical2HGreaterThan},
{PredCondition::GreaterEqualWithNan, OperationCode::Logical2HGreaterEqual}};
{PredCondition::LessThanWithNan, OperationCode::Logical2HLessThanWithNan},
{PredCondition::NotEqualWithNan, OperationCode::Logical2HNotEqualWithNan},
{PredCondition::LessEqualWithNan, OperationCode::Logical2HLessEqualWithNan},
{PredCondition::GreaterThanWithNan, OperationCode::Logical2HGreaterThanWithNan},
{PredCondition::GreaterEqualWithNan, OperationCode::Logical2HGreaterEqualWithNan}};
const auto comparison{PredicateComparisonTable.find(condition)};
UNIMPLEMENTED_IF_MSG(comparison == PredicateComparisonTable.end(),

6
src/video_core/shader/shader_ir.h
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@ -156,6 +156,12 @@ enum class OperationCode {
Logical2HGreaterThan, /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool2
Logical2HNotEqual, /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool2
Logical2HGreaterEqual, /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool2
Logical2HLessThanWithNan, /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool2
Logical2HEqualWithNan, /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool2
Logical2HLessEqualWithNan, /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool2
Logical2HGreaterThanWithNan, /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool2
Logical2HNotEqualWithNan, /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool2
Logical2HGreaterEqualWithNan, /// (MetaHalfArithmetic, f16vec2 a, f16vec2) -> bool2
Texture, /// (MetaTexture, float[N] coords) -> float4
TextureLod, /// (MetaTexture, float[N] coords) -> float4