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Add-support-for-SPV_NV_compute_shader_derivatives

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This commit is contained in:
Chao Chen
2018-09-19 11:40:45 -07:00
parent 9eada4b971
commit beae2251b7
14 changed files with 1257 additions and 154 deletions
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19
SPIRV/GlslangToSpv.cpp
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@@ -1300,6 +1300,17 @@ TGlslangToSpvTraverser::TGlslangToSpvTraverser(unsigned int spvVersion, const gl
builder.addExecutionMode(shaderEntry, spv::ExecutionModeLocalSize, glslangIntermediate->getLocalSize(0),
glslangIntermediate->getLocalSize(1),
glslangIntermediate->getLocalSize(2));
#ifdef NV_EXTENSIONS
if (glslangIntermediate->getLayoutDerivativeModeNone() == glslang::LayoutDerivativeGroupQuads) {
builder.addCapability(spv::CapabilityComputeDerivativeGroupQuadsNV);
builder.addExecutionMode(shaderEntry, spv::ExecutionModeDerivativeGroupQuadsNV);
builder.addExtension(spv::E_SPV_NV_compute_shader_derivatives);
} else if (glslangIntermediate->getLayoutDerivativeModeNone() == glslang::LayoutDerivativeGroupLinear) {
builder.addCapability(spv::CapabilityComputeDerivativeGroupLinearNV);
builder.addExecutionMode(shaderEntry, spv::ExecutionModeDerivativeGroupLinearNV);
builder.addExtension(spv::E_SPV_NV_compute_shader_derivatives);
}
#endif
break;
default:
@@ -4093,7 +4104,13 @@ spv::Id TGlslangToSpvTraverser::createImageTextureFunctionCall(glslang::TIntermO
if (cracked.lod) {
params.lod = arguments[2 + extraArgs];
++extraArgs;
} else if (glslangIntermediate->getStage() != EShLangFragment) {
} else if (glslangIntermediate->getStage() != EShLangFragment
#ifdef NV_EXTENSIONS
// NV_compute_shader_derivatives layout qualifiers allow for implicit LODs
&& !(glslangIntermediate->getStage() == EShLangCompute &&
(glslangIntermediate->getLayoutDerivativeModeNone() != glslang::LayoutDerivativeNone))
#endif
) {
// we need to invent the default lod for an explicit lod instruction for a non-fragment stage
noImplicitLod = true;
}