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[dxbc] Reduce length of tessellation i/o arrays to minimum

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This allows us to fix a violation of the Vulkan specification
where using the same location range for per-vertex and per-patch
i/o is illegal.

May also help certain drivers figure out what's actually needed.
This commit is contained in:
Philip Rebohle 2019-01-26 17:12:23 +01:00
parent b0b7960548
commit 1cc24c223b
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GPG Key ID: C8CC613427A31C99
1 changed files with 22 additions and 3 deletions
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25
src/dxbc/dxbc_compiler.cpp
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@ -6855,6 +6855,9 @@ namespace dxvk {
void DxbcCompiler::emitHsOutputSetup() {
uint32_t outputPerPatch = emitTessInterfacePerPatch(spv::StorageClassOutput);
if (!outputPerPatch)
return;
uint32_t vecType = getVectorTypeId({ DxbcScalarType::Float32, 4 });
uint32_t srcPtrType = m_module.defPointerType(vecType, spv::StorageClassPrivate);
@ -6881,8 +6884,13 @@ namespace dxvk {
if (storageClass == spv::StorageClassOutput)
name = "oPatch";
uint32_t arrLen = m_psgn != nullptr ? m_psgn->maxRegisterCount() : 0;
if (!arrLen)
return 0;
uint32_t vecType = m_module.defVectorType (m_module.defFloatType(32), 4);
uint32_t arrType = m_module.defArrayType (vecType, m_module.constu32(32));
uint32_t arrType = m_module.defArrayType (vecType, m_module.constu32(arrLen));
uint32_t ptrType = m_module.defPointerType(arrType, storageClass);
uint32_t varId = m_module.newVar (ptrType, storageClass);
@ -6902,14 +6910,25 @@ namespace dxvk {
uint32_t DxbcCompiler::emitTessInterfacePerVertex(spv::StorageClass storageClass, uint32_t vertexCount) {
const bool isInput = storageClass == spv::StorageClassInput;
uint32_t arrLen = isInput
? (m_isgn != nullptr ? m_isgn->maxRegisterCount() : 0)
: (m_osgn != nullptr ? m_osgn->maxRegisterCount() : 0);
if (!arrLen)
return 0;
uint32_t locIdx = m_psgn != nullptr
? m_psgn->maxRegisterCount()
: 0;
uint32_t vecType = m_module.defVectorType (m_module.defFloatType(32), 4);
uint32_t arrTypeInner = m_module.defArrayType (vecType, m_module.constu32(32));
uint32_t arrTypeInner = m_module.defArrayType (vecType, m_module.constu32(arrLen));
uint32_t arrTypeOuter = m_module.defArrayType (arrTypeInner, m_module.constu32(vertexCount));
uint32_t ptrType = m_module.defPointerType(arrTypeOuter, storageClass);
uint32_t varId = m_module.newVar (ptrType, storageClass);
m_module.setDebugName (varId, isInput ? "vVertex" : "oVertex");
m_module.decorateLocation (varId, 0);
m_module.decorateLocation (varId, locIdx);
if (storageClass != spv::StorageClassPrivate)
m_entryPointInterfaces.push_back(varId);