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Handle llvm.fma.* intrinsics. rdar://10914096

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154439 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2012-04-10 21:40:28 +00:00
parent 507bb7a42f
commit 3aef2ff514
4 changed files with 50 additions and 2 deletions
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6
lib/Target/ARM/ARMISelLowering.cpp
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@ -769,8 +769,10 @@ ARMTargetLowering::ARMTargetLowering(TargetMachine &TM)
setOperationAction(ISD::FPOW, MVT::f64, Expand);
setOperationAction(ISD::FPOW, MVT::f32, Expand);
setOperationAction(ISD::FMA, MVT::f64, Expand);
setOperationAction(ISD::FMA, MVT::f32, Expand);
if (!Subtarget->hasVFP4()) {
setOperationAction(ISD::FMA, MVT::f64, Expand);
setOperationAction(ISD::FMA, MVT::f32, Expand);
}
// Various VFP goodness
if (!TM.Options.UseSoftFloat && !Subtarget->isThumb1Only()) {

8
lib/Target/ARM/ARMInstrNEON.td
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@ -4133,6 +4133,14 @@ def VFMSfq : N3VQMulOp<0, 0, 0b10, 0b1100, 1, IIC_VFMACQ, "vfms", "f32",
v4f32, fmul_su, fsub_mlx>,
Requires<[HasNEON2,FPContractions]>;
// Match @llvm.fma.* intrinsics
def : Pat<(fma (v2f32 DPR:$src1), (v2f32 DPR:$Vn), (v2f32 DPR:$Vm)),
(VFMAfd DPR:$src1, DPR:$Vn, DPR:$Vm)>,
Requires<[HasNEON, HasVFP4]>;
def : Pat<(fma (v4f32 QPR:$src1), (v4f32 QPR:$Vn), (v4f32 QPR:$Vm)),
(VFMAfq QPR:$src1, QPR:$Vn, QPR:$Vm)>,
Requires<[HasNEON, HasVFP4]>;
// Vector Subtract Operations.
// VSUB : Vector Subtract (integer and floating-point)

8
lib/Target/ARM/ARMInstrVFP.td
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@ -1080,6 +1080,14 @@ def : Pat<(fadd_mlx SPR:$dstin, (fmul_su SPR:$a, SPR:$b)),
(VFMAS SPR:$dstin, SPR:$a, SPR:$b)>,
Requires<[HasVFP4,DontUseNEONForFP,FPContractions]>;
// Match @llvm.fma.* intrinsics
def : Pat<(fma (f64 DPR:$Ddin), (f64 DPR:$Dn), (f64 DPR:$Dm)),
(VFMAD DPR:$Ddin, DPR:$Dn, DPR:$Dm)>,
Requires<[HasVFP4]>;
def : Pat<(fma (f32 SPR:$Sdin), (f32 SPR:$Sn), (f32 SPR:$Sm)),
(VFMAS SPR:$Sdin, SPR:$Sn, SPR:$Sm)>,
Requires<[HasVFP4]>;
def VFMSD : ADbI<0b11101, 0b10, 1, 0,
(outs DPR:$Dd), (ins DPR:$Ddin, DPR:$Dn, DPR:$Dm),
IIC_fpFMAC64, "vfms", ".f64\t$Dd, $Dn, $Dm",

30
test/CodeGen/ARM/fma.ll Normal file
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@ -0,0 +1,30 @@
; RUN: llc < %s -mtriple=thumbv7-apple-ios -mattr=+vfp4 | FileCheck %s
define float @test_f32(float %a, float %b, float %c) nounwind readnone ssp {
entry:
; CHECK: test_f32
; CHECK: vfma.f32
%call = tail call float @llvm.fma.f32(float %a, float %b, float %c) nounwind readnone
ret float %call
}
define double @test_f64(double %a, double %b, double %c) nounwind readnone ssp {
entry:
; CHECK: test_f64
; CHECK: vfma.f64
%call = tail call double @llvm.fma.f64(double %a, double %b, double %c) nounwind readnone
ret double %call
}
define <2 x float> @test_v2f32(<2 x float> %a, <2 x float> %b, <2 x float> %c) nounwind readnone ssp {
entry:
; CHECK: test_v2f32
; CHECK: vfma.f32
%0 = tail call <2 x float> @llvm.fma.v2f32(<2 x float> %a, <2 x float> %b, <2 x float> %c) nounwind
ret <2 x float> %0
}
declare float @llvm.fma.f32(float, float, float) nounwind readnone
declare double @llvm.fma.f64(double, double, double) nounwind readnone
declare <2 x float> @llvm.fma.v2f32(<2 x float>, <2 x float>, <2 x float>) nounwind readnone