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Merge pull request #3979 from ReinUsesLisp/thread-group

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shader/other: Implement thread comparisons (NV_shader_thread_group)
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bunnei 2020-05-24 00:33:06 -04:00 committed by GitHub
commit 487dd05170
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4 changed files with 72 additions and 0 deletions
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23
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
View file

@ -2309,6 +2309,18 @@ private:
return {"gl_SubGroupInvocationARB", Type::Uint};
}
template <const std::string_view& comparison>
Expression ThreadMask(Operation) {
if (device.HasWarpIntrinsics()) {
return {fmt::format("gl_Thread{}MaskNV", comparison), Type::Uint};
}
if (device.HasShaderBallot()) {
return {fmt::format("uint(gl_SubGroup{}MaskARB)", comparison), Type::Uint};
}
LOG_ERROR(Render_OpenGL, "Thread mask intrinsics are required by the shader");
return {"0U", Type::Uint};
}
Expression ShuffleIndexed(Operation operation) {
std::string value = VisitOperand(operation, 0).AsFloat();
@ -2337,6 +2349,12 @@ private:
static constexpr std::string_view NotEqual = "!=";
static constexpr std::string_view GreaterEqual = ">=";
static constexpr std::string_view Eq = "Eq";
static constexpr std::string_view Ge = "Ge";
static constexpr std::string_view Gt = "Gt";
static constexpr std::string_view Le = "Le";
static constexpr std::string_view Lt = "Lt";
static constexpr std::string_view Add = "Add";
static constexpr std::string_view Min = "Min";
static constexpr std::string_view Max = "Max";
@ -2554,6 +2572,11 @@ private:
&GLSLDecompiler::VoteEqual,
&GLSLDecompiler::ThreadId,
&GLSLDecompiler::ThreadMask<Func::Eq>,
&GLSLDecompiler::ThreadMask<Func::Ge>,
&GLSLDecompiler::ThreadMask<Func::Gt>,
&GLSLDecompiler::ThreadMask<Func::Le>,
&GLSLDecompiler::ThreadMask<Func::Lt>,
&GLSLDecompiler::ShuffleIndexed,
&GLSLDecompiler::MemoryBarrierGL,

23
src/video_core/renderer_vulkan/vk_shader_decompiler.cpp
View file

@ -515,6 +515,16 @@ private:
void DeclareCommon() {
thread_id =
DeclareInputBuiltIn(spv::BuiltIn::SubgroupLocalInvocationId, t_in_uint, "thread_id");
thread_masks[0] =
DeclareInputBuiltIn(spv::BuiltIn::SubgroupEqMask, t_in_uint4, "thread_eq_mask");
thread_masks[1] =
DeclareInputBuiltIn(spv::BuiltIn::SubgroupGeMask, t_in_uint4, "thread_ge_mask");
thread_masks[2] =
DeclareInputBuiltIn(spv::BuiltIn::SubgroupGtMask, t_in_uint4, "thread_gt_mask");
thread_masks[3] =
DeclareInputBuiltIn(spv::BuiltIn::SubgroupLeMask, t_in_uint4, "thread_le_mask");
thread_masks[4] =
DeclareInputBuiltIn(spv::BuiltIn::SubgroupLtMask, t_in_uint4, "thread_lt_mask");
}
void DeclareVertex() {
@ -2175,6 +2185,13 @@ private:
return {OpLoad(t_uint, thread_id), Type::Uint};
}
template <std::size_t index>
Expression ThreadMask(Operation) {
// TODO(Rodrigo): Handle devices with different warp sizes
const Id mask = thread_masks[index];
return {OpLoad(t_uint, AccessElement(t_in_uint, mask, 0)), Type::Uint};
}
Expression ShuffleIndexed(Operation operation) {
const Id value = AsFloat(Visit(operation[0]));
const Id index = AsUint(Visit(operation[1]));
@ -2639,6 +2656,11 @@ private:
&SPIRVDecompiler::Vote<&Module::OpSubgroupAllEqualKHR>,
&SPIRVDecompiler::ThreadId,
&SPIRVDecompiler::ThreadMask<0>, // Eq
&SPIRVDecompiler::ThreadMask<1>, // Ge
&SPIRVDecompiler::ThreadMask<2>, // Gt
&SPIRVDecompiler::ThreadMask<3>, // Le
&SPIRVDecompiler::ThreadMask<4>, // Lt
&SPIRVDecompiler::ShuffleIndexed,
&SPIRVDecompiler::MemoryBarrierGL,
@ -2763,6 +2785,7 @@ private:
Id workgroup_id{};
Id local_invocation_id{};
Id thread_id{};
std::array<Id, 5> thread_masks{}; // eq, ge, gt, le, lt
VertexIndices in_indices;
VertexIndices out_indices;

21
src/video_core/shader/decode/other.cpp
View file

@ -109,6 +109,27 @@ u32 ShaderIR::DecodeOther(NodeBlock& bb, u32 pc) {
return Operation(OperationCode::WorkGroupIdY);
case SystemVariable::CtaIdZ:
return Operation(OperationCode::WorkGroupIdZ);
case SystemVariable::EqMask:
case SystemVariable::LtMask:
case SystemVariable::LeMask:
case SystemVariable::GtMask:
case SystemVariable::GeMask:
uses_warps = true;
switch (instr.sys20) {
case SystemVariable::EqMask:
return Operation(OperationCode::ThreadEqMask);
case SystemVariable::LtMask:
return Operation(OperationCode::ThreadLtMask);
case SystemVariable::LeMask:
return Operation(OperationCode::ThreadLeMask);
case SystemVariable::GtMask:
return Operation(OperationCode::ThreadGtMask);
case SystemVariable::GeMask:
return Operation(OperationCode::ThreadGeMask);
default:
UNREACHABLE();
return Immediate(0u);
}
default:
UNIMPLEMENTED_MSG("Unhandled system move: {}",
static_cast<u32>(instr.sys20.Value()));

5
src/video_core/shader/node.h
View file

@ -226,6 +226,11 @@ enum class OperationCode {
VoteEqual, /// (bool) -> bool
ThreadId, /// () -> uint
ThreadEqMask, /// () -> uint
ThreadGeMask, /// () -> uint
ThreadGtMask, /// () -> uint
ThreadLeMask, /// () -> uint
ThreadLtMask, /// () -> uint
ShuffleIndexed, /// (uint value, uint index) -> uint
MemoryBarrierGL, /// () -> void