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[RISCV][GISel] Use libcalls for rint, nearbyint, trunc, round, and roundeven intrinsics. #108779

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Merged
merged 1 commit into from
Sep 18, 2024
Merged

[RISCV][GISel] Use libcalls for rint, nearbyint, trunc, round, and roundeven intrinsics. #108779

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6 changes: 6 additions & 0 deletions llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -485,6 +485,10 @@ static RTLIB::Libcall getRTLibDesc(unsigned Opcode, unsigned Size) {
RTLIBCASE(RINT_F);
case TargetOpcode::G_FNEARBYINT:
RTLIBCASE(NEARBYINT_F);
case TargetOpcode::G_INTRINSIC_TRUNC:
RTLIBCASE(TRUNC_F);
case TargetOpcode::G_INTRINSIC_ROUND:
RTLIBCASE(ROUND_F);
case TargetOpcode::G_INTRINSIC_ROUNDEVEN:
RTLIBCASE(ROUNDEVEN_F);
case TargetOpcode::G_INTRINSIC_LRINT:
Expand Down Expand Up @@ -1215,6 +1219,8 @@ LegalizerHelper::libcall(MachineInstr &MI, LostDebugLocObserver &LocObserver) {
case TargetOpcode::G_FSQRT:
case TargetOpcode::G_FRINT:
case TargetOpcode::G_FNEARBYINT:
case TargetOpcode::G_INTRINSIC_TRUNC:
case TargetOpcode::G_INTRINSIC_ROUND:
case TargetOpcode::G_INTRINSIC_ROUNDEVEN: {
LLT LLTy = MRI.getType(MI.getOperand(0).getReg());
unsigned Size = LLTy.getSizeInBits();
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4 changes: 3 additions & 1 deletion llvm/lib/Target/RISCV/GISel/RISCVLegalizerInfo.cpp
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Expand Up @@ -541,7 +541,9 @@ RISCVLegalizerInfo::RISCVLegalizerInfo(const RISCVSubtarget &ST)

// FIXME: We can do custom inline expansion like SelectionDAG.
// FIXME: Legal with Zfa.
getActionDefinitionsBuilder({G_FCEIL, G_FFLOOR})
getActionDefinitionsBuilder({G_FCEIL, G_FFLOOR, G_FRINT, G_FNEARBYINT,
G_INTRINSIC_TRUNC, G_INTRINSIC_ROUND,
G_INTRINSIC_ROUNDEVEN})
.libcallFor({s32, s64});

getActionDefinitionsBuilder(G_VASTART).customFor({p0});
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98 changes: 0 additions & 98 deletions llvm/test/CodeGen/RISCV/GlobalISel/legalizer/legalize-fp-ceil-floor.mir
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