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SPV OpAtomicCompareSwap: Generate correct operand order and number of operands.

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This commit is contained in:
John Kessenich
2015-09-14 22:45:16 -06:00
parent 7355eebb18
commit 3e60a6ff13
3 changed files with 11 additions and 4 deletions
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11
SPIRV/GlslangToSpv.cpp
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@@ -2526,14 +2526,21 @@ spv::Id TGlslangToSpvTraverser::createAtomicOperation(glslang::TOperator op, spv
// Sort out the operands
// - mapping from glslang -> SPV
// - there are extra SPV operands with no glslang source
// - compare-exchange swaps the value and comparator
// - compare-exchange has an extra memory semantics
std::vector<spv::Id> spvAtomicOperands; // hold the spv operands
auto opIt = operands.begin(); // walk the glslang operands
spvAtomicOperands.push_back(*(opIt++));
spvAtomicOperands.push_back(builder.makeUintConstant(spv::ScopeDevice)); // TBD: what is the correct scope?
spvAtomicOperands.push_back(builder.makeUintConstant(spv::MemorySemanticsMaskNone)); // TBD: what are the correct memory semantics?
if (opCode == spv::OpAtomicCompareExchange) {
spvAtomicOperands.push_back(builder.makeUintConstant(spv::MemorySemanticsMaskNone)); // TBD: what are the correct memory semantics?
spvAtomicOperands.push_back(*(opIt + 1));
spvAtomicOperands.push_back(*opIt);
opIt += 2;
}
// Add the rest of the operands, skipping the first one, which was dealt with above.
// For some ops, there are none, for some 1, for compare-exchange, 2.
// Add the rest of the operands, skipping any that were dealt with above.
for (; opIt != operands.end(); ++opIt)
spvAtomicOperands.push_back(*opIt);