craig.topper added inline comments.
================
Comment at: clang/lib/CodeGen/CGBuiltin.cpp:13347
case SystemZ::BI__builtin_s390_vfnmadb: {
llvm::Type *ResultType = ConvertType(E->getType());
Value *X = EmitScalarExpr(E->getArg(0));
----------------
What are the semantics of vfnmadb with respect to when it rounds vs the
negation? If the rounding mode is for ceil/floor and the negate is applied
after, that would be different that if it was before.
================
Comment at: clang/lib/CodeGen/CGBuiltin.cpp:13369
+ Value *NegZ = Builder.CreateFNeg(Z, "sub");
+ return Builder.CreateFNeg(Builder.CreateConstrainedFPCall(F, {X, Y,
NegZ}));
+ } else {
----------------
Same question as above.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D72722/new/
https://reviews.llvm.org/D72722
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