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[X86] Mark fp128 FMA as LibCall instead of Expand. Add STRICT_FMA as well.

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The Expand code would fall back to LibCall, but this makes it
more explicit.
This commit is contained in:
Craig Topper 2019-11-21 17:06:41 -08:00
parent 8ec00b9e73
commit 6271249f2e
2 changed files with 15 additions and 1 deletions
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3
lib/Target/X86/X86ISelLowering.cpp
View File

@ -674,7 +674,8 @@ X86TargetLowering::X86TargetLowering(const X86TargetMachine &TM,
setOperationAction(ISD::STRICT_FDIV, MVT::f128, LibCall);
setOperationAction(ISD::FMUL, MVT::f128, LibCall);
setOperationAction(ISD::STRICT_FMUL, MVT::f128, LibCall);
setOperationAction(ISD::FMA, MVT::f128, Expand);
setOperationAction(ISD::FMA, MVT::f128, LibCall);
setOperationAction(ISD::STRICT_FMA, MVT::f128, LibCall);
setOperationAction(ISD::FABS, MVT::f128, Custom);
setOperationAction(ISD::FNEG, MVT::f128, Custom);

13
test/CodeGen/X86/fp128-libcalls-strict.ll
View File

@ -54,9 +54,22 @@ entry:
ret fp128 %div
}
define fp128 @fma(fp128 %x, fp128 %y, fp128 %z) nounwind strictfp {
; CHECK-LABEL: fma:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: pushq %rax
; CHECK-NEXT: callq fmal
; CHECK-NEXT: popq %rax
; CHECK-NEXT: retq
entry:
%fma = call fp128 @llvm.experimental.constrained.fma.f128(fp128 %x, fp128 %y, fp128 %z, metadata !"round.dynamic", metadata !"fpexcept.strict") #0
ret fp128 %fma
}
attributes #0 = { strictfp }
declare fp128 @llvm.experimental.constrained.fadd.f128(fp128, fp128, metadata, metadata)
declare fp128 @llvm.experimental.constrained.fsub.f128(fp128, fp128, metadata, metadata)
declare fp128 @llvm.experimental.constrained.fmul.f128(fp128, fp128, metadata, metadata)
declare fp128 @llvm.experimental.constrained.fdiv.f128(fp128, fp128, metadata, metadata)
declare fp128 @llvm.experimental.constrained.fma.f128(fp128, fp128, fp128, metadata, metadata)