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gl_shader_decompiler: Reimplement shuffles with platform agnostic intrinsics

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This commit is contained in:
ReinUsesLisp 2019-11-02 23:44:13 -03:00
parent b6ae48966d
commit 08b2b1080a
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GPG key ID: 2DFC508897B39CFE
5 changed files with 59 additions and 132 deletions
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1
src/video_core/renderer_opengl/gl_shader_cache.cpp
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@ -275,6 +275,7 @@ CachedProgram BuildShader(const Device& device, u64 unique_identifier, ProgramTy
std::string source = fmt::format(R"(// {}
#version 430 core
#extension GL_ARB_separate_shader_objects : enable
#extension GL_ARB_shader_ballot : enable
#extension GL_ARB_shader_viewport_layer_array : enable
#extension GL_EXT_shader_image_load_formatted : enable
#extension GL_NV_gpu_shader5 : enable

48
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
View file

@ -1942,34 +1942,14 @@ private:
return Vote(operation, "allThreadsEqualNV");
}
template <const std::string_view& func>
Expression Shuffle(Operation operation) {
const std::string value = VisitOperand(operation, 0).AsFloat();
if (!device.HasWarpIntrinsics()) {
LOG_ERROR(Render_OpenGL, "Nvidia shuffle intrinsics are required by this shader");
// On a "single-thread" device we are either on the same thread or out of bounds. Both
// cases return the passed value.
return {value, Type::Float};
}
const std::string index = VisitOperand(operation, 1).AsUint();
const std::string width = VisitOperand(operation, 2).AsUint();
return {fmt::format("{}({}, {}, {})", func, value, index, width), Type::Float};
Expression ThreadId(Operation operation) {
return {"gl_SubGroupInvocationARB", Type::Uint};
}
template <const std::string_view& func>
Expression InRangeShuffle(Operation operation) {
const std::string index = VisitOperand(operation, 0).AsUint();
const std::string width = VisitOperand(operation, 1).AsUint();
if (!device.HasWarpIntrinsics()) {
// On a "single-thread" device we are only in bounds when the requested index is 0.
return {fmt::format("({} == 0U)", index), Type::Bool};
}
const std::string in_range = code.GenerateTemporary();
code.AddLine("bool {};", in_range);
code.AddLine("{}(0U, {}, {}, {});", func, index, width, in_range);
return {in_range, Type::Bool};
Expression ShuffleIndexed(Operation operation) {
const std::string value = VisitOperand(operation, 0).AsFloat();
const std::string index = VisitOperand(operation, 1).AsUint();
return {fmt::format("readInvocationARB({}, {})", value, index), Type::Float};
}
struct Func final {
@ -1981,11 +1961,6 @@ private:
static constexpr std::string_view Or = "Or";
static constexpr std::string_view Xor = "Xor";
static constexpr std::string_view Exchange = "Exchange";
static constexpr std::string_view ShuffleIndexed = "shuffleNV";
static constexpr std::string_view ShuffleUp = "shuffleUpNV";
static constexpr std::string_view ShuffleDown = "shuffleDownNV";
static constexpr std::string_view ShuffleButterfly = "shuffleXorNV";
};
static constexpr std::array operation_decompilers = {
@ -2151,15 +2126,8 @@ private:
&GLSLDecompiler::VoteAny,
&GLSLDecompiler::VoteEqual,
&GLSLDecompiler::Shuffle<Func::ShuffleIndexed>,
&GLSLDecompiler::Shuffle<Func::ShuffleUp>,
&GLSLDecompiler::Shuffle<Func::ShuffleDown>,
&GLSLDecompiler::Shuffle<Func::ShuffleButterfly>,
&GLSLDecompiler::InRangeShuffle<Func::ShuffleIndexed>,
&GLSLDecompiler::InRangeShuffle<Func::ShuffleUp>,
&GLSLDecompiler::InRangeShuffle<Func::ShuffleDown>,
&GLSLDecompiler::InRangeShuffle<Func::ShuffleButterfly>,
&GLSLDecompiler::ThreadId,
&GLSLDecompiler::ShuffleIndexed,
};
static_assert(operation_decompilers.size() == static_cast<std::size_t>(OperationCode::Amount));