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Merge pull request #3081 from ReinUsesLisp/fswzadd-shuffles

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shader: Implement FSWZADD and reimplement SHFL
This commit is contained in:
Fernando Sahmkow 2019-11-14 10:27:27 -04:00 committed by GitHub
commit b6f6733131
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GPG key ID: 4AEE18F83AFDEB23
8 changed files with 138 additions and 136 deletions
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10
src/video_core/engines/shader_bytecode.h
View file

@ -615,6 +615,14 @@ union Instruction {
BitField<34, 13, u64> mask_imm;
} shfl;
union {
BitField<44, 1, u64> ftz;
BitField<39, 2, u64> tab5cb8_2;
BitField<38, 1, u64> ndv;
BitField<47, 1, u64> cc;
BitField<28, 8, u64> swizzle;
} fswzadd;
union {
BitField<8, 8, Register> gpr;
BitField<20, 24, s64> offset;
@ -1592,6 +1600,7 @@ public:
DEPBAR,
VOTE,
SHFL,
FSWZADD,
BFE_C,
BFE_R,
BFE_IMM,
@ -1890,6 +1899,7 @@ private:
INST("1111000011110---", Id::DEPBAR, Type::Synch, "DEPBAR"),
INST("0101000011011---", Id::VOTE, Type::Warp, "VOTE"),
INST("1110111100010---", Id::SHFL, Type::Warp, "SHFL"),
INST("0101000011111---", Id::FSWZADD, Type::Warp, "FSWZADD"),
INST("1110111111011---", Id::LD_A, Type::Memory, "LD_A"),
INST("1110111101001---", Id::LD_S, Type::Memory, "LD_S"),
INST("1110111101000---", Id::LD_L, Type::Memory, "LD_L"),

2
src/video_core/renderer_opengl/gl_device.cpp
View file

@ -62,6 +62,7 @@ Device::Device() {
max_varyings = GetInteger<u32>(GL_MAX_VARYING_VECTORS);
has_warp_intrinsics = GLAD_GL_NV_gpu_shader5 && GLAD_GL_NV_shader_thread_group &&
GLAD_GL_NV_shader_thread_shuffle;
has_shader_ballot = GLAD_GL_ARB_shader_ballot;
has_vertex_viewport_layer = GLAD_GL_ARB_shader_viewport_layer_array;
has_image_load_formatted = HasExtension(extensions, "GL_EXT_shader_image_load_formatted");
has_variable_aoffi = TestVariableAoffi();
@ -79,6 +80,7 @@ Device::Device(std::nullptr_t) {
max_vertex_attributes = 16;
max_varyings = 15;
has_warp_intrinsics = true;
has_shader_ballot = true;
has_vertex_viewport_layer = true;
has_image_load_formatted = true;
has_variable_aoffi = true;

5
src/video_core/renderer_opengl/gl_device.h
View file

@ -34,6 +34,10 @@ public:
return has_warp_intrinsics;
}
bool HasShaderBallot() const {
return has_shader_ballot;
}
bool HasVertexViewportLayer() const {
return has_vertex_viewport_layer;
}
@ -68,6 +72,7 @@ private:
u32 max_vertex_attributes{};
u32 max_varyings{};
bool has_warp_intrinsics{};
bool has_shader_ballot{};
bool has_vertex_viewport_layer{};
bool has_image_load_formatted{};
bool has_variable_aoffi{};

19
src/video_core/renderer_opengl/gl_shader_cache.cpp
View file

@ -275,16 +275,25 @@ 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_viewport_layer_array : enable
#extension GL_EXT_shader_image_load_formatted : enable
#extension GL_NV_gpu_shader5 : enable
#extension GL_NV_shader_thread_group : enable
#extension GL_NV_shader_thread_shuffle : enable
)",
GetShaderId(unique_identifier, program_type));
if (is_compute) {
source += "#extension GL_ARB_compute_variable_group_size : require\n";
}
if (device.HasShaderBallot()) {
source += "#extension GL_ARB_shader_ballot : require\n";
}
if (device.HasVertexViewportLayer()) {
source += "#extension GL_ARB_shader_viewport_layer_array : require\n";
}
if (device.HasImageLoadFormatted()) {
source += "#extension GL_EXT_shader_image_load_formatted : require\n";
}
if (device.HasWarpIntrinsics()) {
source += "#extension GL_NV_gpu_shader5 : require\n"
"#extension GL_NV_shader_thread_group : require\n"
"#extension GL_NV_shader_thread_shuffle : require\n";
}
source += '\n';
if (!is_compute) {

80
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
View file

@ -1379,6 +1379,26 @@ private:
return GenerateUnary(operation, "float", Type::Float, type);
}
Expression FSwizzleAdd(Operation operation) {
const std::string op_a = VisitOperand(operation, 0).AsFloat();
const std::string op_b = VisitOperand(operation, 1).AsFloat();
if (!device.HasShaderBallot()) {
LOG_ERROR(Render_OpenGL, "Shader ballot is unavailable but required by the shader");
return {fmt::format("{} + {}", op_a, op_b), Type::Float};
}
const std::string instr_mask = VisitOperand(operation, 2).AsUint();
const std::string mask = code.GenerateTemporary();
code.AddLine("uint {} = ({} >> ((gl_SubGroupInvocationARB & 3) << 1)) & 3;", mask,
instr_mask);
const std::string modifier_a = fmt::format("fswzadd_modifiers_a[{}]", mask);
const std::string modifier_b = fmt::format("fswzadd_modifiers_b[{}]", mask);
return {fmt::format("(({} * {}) + ({} * {}))", op_a, modifier_a, op_b, modifier_b),
Type::Float};
}
Expression ICastFloat(Operation operation) {
return GenerateUnary(operation, "int", Type::Int, Type::Float);
}
@ -1942,34 +1962,24 @@ 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};
Expression ThreadId(Operation operation) {
if (!device.HasShaderBallot()) {
LOG_ERROR(Render_OpenGL, "Shader ballot is unavailable but required by the shader");
return {"0U", Type::Uint};
}
return {"gl_SubGroupInvocationARB", Type::Uint};
}
Expression ShuffleIndexed(Operation operation) {
std::string value = VisitOperand(operation, 0).AsFloat();
if (!device.HasShaderBallot()) {
LOG_ERROR(Render_OpenGL, "Shader ballot is unavailable but required by the shader");
return {std::move(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};
}
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};
return {fmt::format("readInvocationARB({}, {})", value, index), Type::Float};
}
struct Func final {
@ -1981,11 +1991,6 @@ 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 = {
@ -2016,6 +2021,7 @@ private:
&GLSLDecompiler::FTrunc,
&GLSLDecompiler::FCastInteger<Type::Int>,
&GLSLDecompiler::FCastInteger<Type::Uint>,
&GLSLDecompiler::FSwizzleAdd,
&GLSLDecompiler::Add<Type::Int>,
&GLSLDecompiler::Mul<Type::Int>,
@ -2151,15 +2157,8 @@ 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));
@ -2492,6 +2491,9 @@ bvec2 HalfFloatNanComparison(bvec2 comparison, vec2 pair1, vec2 pair2) {
bvec2 is_nan2 = isnan(pair2);
return bvec2(comparison.x || is_nan1.x || is_nan2.x, comparison.y || is_nan1.y || is_nan2.y);
}
const float fswzadd_modifiers_a[] = float[4](-1.0f, 1.0f, -1.0f, 0.0f );
const float fswzadd_modifiers_b[] = float[4](-1.0f, -1.0f, 1.0f, -1.0f );
)";
}

55
src/video_core/renderer_vulkan/vk_shader_decompiler.cpp
View file

@ -783,6 +783,11 @@ private:
return {};
}
Id FSwizzleAdd(Operation operation) {
UNIMPLEMENTED();
return {};
}
Id HNegate(Operation operation) {
UNIMPLEMENTED();
return {};
@ -1195,46 +1200,16 @@ private:
return {};
}
Id ThreadId(Operation) {
UNIMPLEMENTED();
return {};
}
Id ShuffleIndexed(Operation) {
UNIMPLEMENTED();
return {};
}
Id ShuffleUp(Operation) {
UNIMPLEMENTED();
return {};
}
Id ShuffleDown(Operation) {
UNIMPLEMENTED();
return {};
}
Id ShuffleButterfly(Operation) {
UNIMPLEMENTED();
return {};
}
Id InRangeShuffleIndexed(Operation) {
UNIMPLEMENTED();
return {};
}
Id InRangeShuffleUp(Operation) {
UNIMPLEMENTED();
return {};
}
Id InRangeShuffleDown(Operation) {
UNIMPLEMENTED();
return {};
}
Id InRangeShuffleButterfly(Operation) {
UNIMPLEMENTED();
return {};
}
Id DeclareBuiltIn(spv::BuiltIn builtin, spv::StorageClass storage, Id type,
const std::string& name) {
const Id id = OpVariable(type, storage);
@ -1393,6 +1368,7 @@ private:
&SPIRVDecompiler::Unary<&Module::OpTrunc, Type::Float>,
&SPIRVDecompiler::Unary<&Module::OpConvertSToF, Type::Float, Type::Int>,
&SPIRVDecompiler::Unary<&Module::OpConvertUToF, Type::Float, Type::Uint>,
&SPIRVDecompiler::FSwizzleAdd,
&SPIRVDecompiler::Binary<&Module::OpIAdd, Type::Int>,
&SPIRVDecompiler::Binary<&Module::OpIMul, Type::Int>,
@ -1528,15 +1504,8 @@ private:
&SPIRVDecompiler::VoteAny,
&SPIRVDecompiler::VoteEqual,
&SPIRVDecompiler::ThreadId,
&SPIRVDecompiler::ShuffleIndexed,
&SPIRVDecompiler::ShuffleUp,
&SPIRVDecompiler::ShuffleDown,
&SPIRVDecompiler::ShuffleButterfly,
&SPIRVDecompiler::InRangeShuffleIndexed,
&SPIRVDecompiler::InRangeShuffleUp,
&SPIRVDecompiler::InRangeShuffleDown,
&SPIRVDecompiler::InRangeShuffleButterfly,
};
static_assert(operation_decompilers.size() == static_cast<std::size_t>(OperationCode::Amount));

91
src/video_core/shader/decode/warp.cpp
View file

@ -17,6 +17,7 @@ using Tegra::Shader::ShuffleOperation;
using Tegra::Shader::VoteOperation;
namespace {
OperationCode GetOperationCode(VoteOperation vote_op) {
switch (vote_op) {
case VoteOperation::All:
@ -30,6 +31,7 @@ OperationCode GetOperationCode(VoteOperation vote_op) {
return OperationCode::VoteAll;
}
}
} // Anonymous namespace
u32 ShaderIR::DecodeWarp(NodeBlock& bb, u32 pc) {
@ -46,50 +48,59 @@ u32 ShaderIR::DecodeWarp(NodeBlock& bb, u32 pc) {
break;
}
case OpCode::Id::SHFL: {
Node width = [this, instr] {
Node mask = instr.shfl.is_mask_imm ? Immediate(static_cast<u32>(instr.shfl.mask_imm))
: GetRegister(instr.gpr39);
// Convert the obscure SHFL mask back into GL_NV_shader_thread_shuffle's width. This has
// been done reversing Nvidia's math. It won't work on all cases due to SHFL having
// different parameters that don't properly map to GLSL's interface, but it should work
// for cases emitted by Nvidia's compiler.
if (instr.shfl.operation == ShuffleOperation::Up) {
return Operation(
OperationCode::ILogicalShiftRight,
Operation(OperationCode::IAdd, std::move(mask), Immediate(-0x2000)),
Immediate(8));
} else {
return Operation(OperationCode::ILogicalShiftRight,
Operation(OperationCode::IAdd, Immediate(0x201F),
Operation(OperationCode::INegate, std::move(mask))),
Immediate(8));
}
}();
const auto [operation, in_range] = [instr]() -> std::pair<OperationCode, OperationCode> {
switch (instr.shfl.operation) {
case ShuffleOperation::Idx:
return {OperationCode::ShuffleIndexed, OperationCode::InRangeShuffleIndexed};
case ShuffleOperation::Up:
return {OperationCode::ShuffleUp, OperationCode::InRangeShuffleUp};
case ShuffleOperation::Down:
return {OperationCode::ShuffleDown, OperationCode::InRangeShuffleDown};
case ShuffleOperation::Bfly:
return {OperationCode::ShuffleButterfly, OperationCode::InRangeShuffleButterfly};
}
UNREACHABLE_MSG("Invalid SHFL operation: {}",
static_cast<u64>(instr.shfl.operation.Value()));
return {};
}();
// Setting the predicate before the register is intentional to avoid overwriting.
Node mask = instr.shfl.is_mask_imm ? Immediate(static_cast<u32>(instr.shfl.mask_imm))
: GetRegister(instr.gpr39);
Node index = instr.shfl.is_index_imm ? Immediate(static_cast<u32>(instr.shfl.index_imm))
: GetRegister(instr.gpr20);
SetPredicate(bb, instr.shfl.pred48, Operation(in_range, index, width));
Node thread_id = Operation(OperationCode::ThreadId);
Node clamp = Operation(OperationCode::IBitwiseAnd, mask, Immediate(0x1FU));
Node seg_mask = BitfieldExtract(mask, 8, 16);
Node neg_seg_mask = Operation(OperationCode::IBitwiseNot, seg_mask);
Node min_thread_id = Operation(OperationCode::IBitwiseAnd, thread_id, seg_mask);
Node max_thread_id = Operation(OperationCode::IBitwiseOr, min_thread_id,
Operation(OperationCode::IBitwiseAnd, clamp, neg_seg_mask));
Node src_thread_id = [instr, index, neg_seg_mask, min_thread_id, thread_id] {
switch (instr.shfl.operation) {
case ShuffleOperation::Idx:
return Operation(OperationCode::IBitwiseOr,
Operation(OperationCode::IBitwiseAnd, index, neg_seg_mask),
min_thread_id);
case ShuffleOperation::Down:
return Operation(OperationCode::IAdd, thread_id, index);
case ShuffleOperation::Up:
return Operation(OperationCode::IAdd, thread_id,
Operation(OperationCode::INegate, index));
case ShuffleOperation::Bfly:
return Operation(OperationCode::IBitwiseXor, thread_id, index);
}
UNREACHABLE();
return Immediate(0U);
}();
Node in_bounds = [instr, src_thread_id, min_thread_id, max_thread_id] {
if (instr.shfl.operation == ShuffleOperation::Up) {
return Operation(OperationCode::LogicalIGreaterEqual, src_thread_id, min_thread_id);
} else {
return Operation(OperationCode::LogicalILessEqual, src_thread_id, max_thread_id);
}
}();
SetPredicate(bb, instr.shfl.pred48, in_bounds);
SetRegister(
bb, instr.gpr0,
Operation(operation, GetRegister(instr.gpr8), std::move(index), std::move(width)));
Operation(OperationCode::ShuffleIndexed, GetRegister(instr.gpr8), src_thread_id));
break;
}
case OpCode::Id::FSWZADD: {
UNIMPLEMENTED_IF(instr.fswzadd.ndv);
Node op_a = GetRegister(instr.gpr8);
Node op_b = GetRegister(instr.gpr20);
Node mask = Immediate(static_cast<u32>(instr.fswzadd.swizzle));
SetRegister(bb, instr.gpr0, Operation(OperationCode::FSwizzleAdd, op_a, op_b, mask));
break;
}
default:

12
src/video_core/shader/node.h
View file

@ -47,6 +47,7 @@ enum class OperationCode {
FTrunc, /// (MetaArithmetic, float a) -> float
FCastInteger, /// (MetaArithmetic, int a) -> float
FCastUInteger, /// (MetaArithmetic, uint a) -> float
FSwizzleAdd, /// (float a, float b, uint mask) -> float
IAdd, /// (MetaArithmetic, int a, int b) -> int
IMul, /// (MetaArithmetic, int a, int b) -> int
@ -181,15 +182,8 @@ enum class OperationCode {
VoteAny, /// (bool) -> bool
VoteEqual, /// (bool) -> bool
ShuffleIndexed, /// (uint value, uint index, uint width) -> uint
ShuffleUp, /// (uint value, uint index, uint width) -> uint
ShuffleDown, /// (uint value, uint index, uint width) -> uint
ShuffleButterfly, /// (uint value, uint index, uint width) -> uint
InRangeShuffleIndexed, /// (uint index, uint width) -> bool
InRangeShuffleUp, /// (uint index, uint width) -> bool
InRangeShuffleDown, /// (uint index, uint width) -> bool
InRangeShuffleButterfly, /// (uint index, uint width) -> bool
ThreadId, /// () -> uint
ShuffleIndexed, /// (uint value, uint index) -> uint
Amount,
};