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add intrinsics for portable packed simd vector reductions #48983

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merged 10 commits into from
Mar 17, 2018
Merged

add intrinsics for portable packed simd vector reductions #48983

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01cc5b3
add intrinsics for portable packed simd vector reductions
gnzlbg Mar 13, 2018
07ce659
expose ordered/unordered/nanless intirnsics
gnzlbg Mar 14, 2018
51832c3
fix style
gnzlbg Mar 14, 2018
c990fa0
add dummy symbols for LLVM<6
gnzlbg Mar 14, 2018
3125a30
error on vector reduction usage if LLVM version is < 5.0
gnzlbg Mar 15, 2018
8478fa2
add min-llvm version to reduction tests
gnzlbg Mar 15, 2018
4fe6acf
add compile fail tests
gnzlbg Mar 15, 2018
19b81f6
error via bug! instead of stderr+terminate
gnzlbg Mar 15, 2018
f173a4c
add missing min-llvm-version
gnzlbg Mar 15, 2018
06148cb
ignore emscripten
gnzlbg Mar 16, 2018
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47 changes: 47 additions & 0 deletions src/rustllvm/RustWrapper.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1442,4 +1442,51 @@ extern "C" LLVMValueRef
LLVMRustBuildVectorReduceFMax(LLVMBuilderRef B, LLVMValueRef Src, bool NoNaN) {
return wrap(unwrap(B)->CreateFPMaxReduce(unwrap(Src), NoNaN));
}

#else

extern "C" LLVMValueRef
LLVMRustBuildVectorReduceFAdd(LLVMBuilderRef, LLVMValueRef, LLVMValueRef Src) {
return Src;
}
extern "C" LLVMValueRef
LLVMRustBuildVectorReduceFMul(LLVMBuilderRef, LLVMValueRef, LLVMValueRef Src) {
return Src;
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This is going to lead to broken IR (you'll wind up with vectors where scalars are expected). To truly support earlier LLVM versions, you'll need a polyfill that does the reduction "by hand".

}
extern "C" LLVMValueRef
LLVMRustBuildVectorReduceAdd(LLVMBuilderRef, LLVMValueRef Src) {
return Src;
}
extern "C" LLVMValueRef
LLVMRustBuildVectorReduceMul(LLVMBuilderRef, LLVMValueRef Src) {
return Src;
}
extern "C" LLVMValueRef
LLVMRustBuildVectorReduceAnd(LLVMBuilderRef, LLVMValueRef Src) {
return Src;
}
extern "C" LLVMValueRef
LLVMRustBuildVectorReduceOr(LLVMBuilderRef, LLVMValueRef Src) {
return Src;
}
extern "C" LLVMValueRef
LLVMRustBuildVectorReduceXor(LLVMBuilderRef, LLVMValueRef Src) {
return Src;
}
extern "C" LLVMValueRef
LLVMRustBuildVectorReduceMin(LLVMBuilderRef, LLVMValueRef Src, bool) {
return Src;
}
extern "C" LLVMValueRef
LLVMRustBuildVectorReduceMax(LLVMBuilderRef, LLVMValueRef Src, bool) {
return Src;
}
extern "C" LLVMValueRef
LLVMRustBuildVectorReduceFMin(LLVMBuilderRef, LLVMValueRef Src, bool) {
return Src;
}
extern "C" LLVMValueRef
LLVMRustBuildVectorReduceFMax(LLVMBuilderRef, LLVMValueRef Src, bool) {
return Src;
}
#endif