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llvm-project/clang/test/CodeGen/fma-builtins.c
Craig Topper 727328433a [X86] Add back fmaddsub intrinsics to work towards fixing the strict fp implementation 
Previously we emitted an fmadd and a fmadd+fneg and combined them with a shufflevector. But this doesn't follow the correct exception behavior for unselected elements so the backend can't merge them into the fmaddsub/fmsubadd instructions.

This patch restores the the fmaddsub intrinsics so we don't have two arithmetic operations. We lose out on optimization opportunity in the non-strict FP case, but I don't think this is a big loss. If someone gives us a test case we can look into adding instcombine/dagcombine improvements. I'd rather not have the frontend do completely different things for strict and non-strict.

This still has problems because target specific intrinsics don't support strict semantics yet. We also still have all of the problems with masking. But we at least generate the right instruction in constrained mode now.

Differential Revision: https://reviews.llvm.org/D74268
2020-02-24 12:07:21 -08:00

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// RUN: %clang_cc1 -flax-vector-conversions=none -ffreestanding %s -triple=x86_64-apple-darwin -target-feature +fma -emit-llvm -o - | FileCheck %s
#include <immintrin.h>
__m128 test_mm_fmadd_ps(__m128 a, __m128 b, __m128 c) {
// CHECK-LABEL: test_mm_fmadd_ps
// CHECK: call <4 x float> @llvm.fma.v4f32(<4 x float> %{{.*}}, <4 x float> %{{.*}}, <4 x float> %{{.*}})
return _mm_fmadd_ps(a, b, c);
}
__m128d test_mm_fmadd_pd(__m128d a, __m128d b, __m128d c) {
// CHECK-LABEL: test_mm_fmadd_pd
// CHECK: call <2 x double> @llvm.fma.v2f64(<2 x double> %{{.*}}, <2 x double> %{{.*}}, <2 x double> %{{.*}})
return _mm_fmadd_pd(a, b, c);
}
__m128 test_mm_fmadd_ss(__m128 a, __m128 b, __m128 c) {
// CHECK-LABEL: test_mm_fmadd_ss
// CHECK: extractelement <4 x float> %{{.*}}, i64 0
// CHECK: extractelement <4 x float> %{{.*}}, i64 0
// CHECK: extractelement <4 x float> %{{.*}}, i64 0
// CHECK: call float @llvm.fma.f32(float %{{.*}}, float %{{.*}}, float %{{.*}})
// CHECK: insertelement <4 x float> %{{.*}}, float %{{.*}}, i64 0
return _mm_fmadd_ss(a, b, c);
}
__m128d test_mm_fmadd_sd(__m128d a, __m128d b, __m128d c) {
// CHECK-LABEL: test_mm_fmadd_sd
// CHECK: extractelement <2 x double> %{{.*}}, i64 0
// CHECK: extractelement <2 x double> %{{.*}}, i64 0
// CHECK: extractelement <2 x double> %{{.*}}, i64 0
// CHECK: call double @llvm.fma.f64(double %{{.*}}, double %{{.*}}, double %{{.*}})
// CHECK: insertelement <2 x double> %{{.*}}, double %{{.*}}, i64 0
return _mm_fmadd_sd(a, b, c);
}
__m128 test_mm_fmsub_ps(__m128 a, __m128 b, __m128 c) {
// CHECK-LABEL: test_mm_fmsub_ps
// CHECK: [[NEG:%.+]] = fneg <4 x float> %{{.+}}
// CHECK: call <4 x float> @llvm.fma.v4f32(<4 x float> %{{.*}}, <4 x float> %{{.*}}, <4 x float> %{{.*}})
return _mm_fmsub_ps(a, b, c);
}
__m128d test_mm_fmsub_pd(__m128d a, __m128d b, __m128d c) {
// CHECK-LABEL: test_mm_fmsub_pd
// CHECK: [[NEG:%.+]] = fneg <2 x double> %{{.+}}
// CHECK: call <2 x double> @llvm.fma.v2f64(<2 x double> %{{.*}}, <2 x double> %{{.*}}, <2 x double> %{{.*}})
return _mm_fmsub_pd(a, b, c);
}
__m128 test_mm_fmsub_ss(__m128 a, __m128 b, __m128 c) {
// CHECK-LABEL: test_mm_fmsub_ss
// CHECK: [[NEG:%.+]] = fneg <4 x float> %{{.+}}
// CHECK: extractelement <4 x float> %{{.*}}, i64 0
// CHECK: extractelement <4 x float> %{{.*}}, i64 0
// CHECK: extractelement <4 x float> %{{.*}}, i64 0
// CHECK: call float @llvm.fma.f32(float %{{.*}}, float %{{.*}}, float %{{.*}})
// CHECK: insertelement <4 x float> %{{.*}}, float %{{.*}}, i64 0
return _mm_fmsub_ss(a, b, c);
}
__m128d test_mm_fmsub_sd(__m128d a, __m128d b, __m128d c) {
// CHECK-LABEL: test_mm_fmsub_sd
// CHECK: [[NEG:%.+]] = fneg <2 x double> %{{.+}}
// CHECK: extractelement <2 x double> %{{.*}}, i64 0
// CHECK: extractelement <2 x double> %{{.*}}, i64 0
// CHECK: extractelement <2 x double> %{{.*}}, i64 0
// CHECK: call double @llvm.fma.f64(double %{{.*}}, double %{{.*}}, double %{{.*}})
// CHECK: insertelement <2 x double> %{{.*}}, double %{{.*}}, i64 0
return _mm_fmsub_sd(a, b, c);
}
__m128 test_mm_fnmadd_ps(__m128 a, __m128 b, __m128 c) {
// CHECK-LABEL: test_mm_fnmadd_ps
// CHECK: [[NEG:%.+]] = fneg <4 x float> %{{.+}}
// CHECK: call <4 x float> @llvm.fma.v4f32(<4 x float> %{{.*}}, <4 x float> %{{.*}}, <4 x float> %{{.*}})
return _mm_fnmadd_ps(a, b, c);
}
__m128d test_mm_fnmadd_pd(__m128d a, __m128d b, __m128d c) {
// CHECK-LABEL: test_mm_fnmadd_pd
// CHECK: [[NEG:%.+]] = fneg <2 x double> %{{.+}}
// CHECK: call <2 x double> @llvm.fma.v2f64(<2 x double> %{{.*}}, <2 x double> %{{.*}}, <2 x double> %{{.*}})
return _mm_fnmadd_pd(a, b, c);
}
__m128 test_mm_fnmadd_ss(__m128 a, __m128 b, __m128 c) {
// CHECK-LABEL: test_mm_fnmadd_ss
// CHECK: [[NEG:%.+]] = fneg <4 x float> %{{.+}}
// CHECK: extractelement <4 x float> %{{.*}}, i64 0
// CHECK: extractelement <4 x float> %{{.*}}, i64 0
// CHECK: extractelement <4 x float> %{{.*}}, i64 0
// CHECK: call float @llvm.fma.f32(float %{{.*}}, float %{{.*}}, float %{{.*}})
// CHECK: insertelement <4 x float> %{{.*}}, float %{{.*}}, i64 0
return _mm_fnmadd_ss(a, b, c);
}
__m128d test_mm_fnmadd_sd(__m128d a, __m128d b, __m128d c) {
// CHECK-LABEL: test_mm_fnmadd_sd
// CHECK: [[NEG:%.+]] = fneg <2 x double> %{{.+}}
// CHECK: extractelement <2 x double> %{{.*}}, i64 0
// CHECK: extractelement <2 x double> %{{.*}}, i64 0
// CHECK: extractelement <2 x double> %{{.*}}, i64 0
// CHECK: call double @llvm.fma.f64(double %{{.*}}, double %{{.*}}, double %{{.*}})
// CHECK: insertelement <2 x double> %{{.*}}, double %{{.*}}, i64 0
return _mm_fnmadd_sd(a, b, c);
}
__m128 test_mm_fnmsub_ps(__m128 a, __m128 b, __m128 c) {
// CHECK-LABEL: test_mm_fnmsub_ps
// CHECK: [[NEG:%.+]] = fneg <4 x float> %{{.+}}
// CHECK: [[NEG2:%.+]] = fneg <4 x float> %{{.+}}
// CHECK: call <4 x float> @llvm.fma.v4f32(<4 x float> %{{.*}}, <4 x float> %{{.*}}, <4 x float> %{{.*}})
return _mm_fnmsub_ps(a, b, c);
}
__m128d test_mm_fnmsub_pd(__m128d a, __m128d b, __m128d c) {
// CHECK-LABEL: test_mm_fnmsub_pd
// CHECK: [[NEG:%.+]] = fneg <2 x double> %{{.+}}
// CHECK: [[NEG2:%.+]] = fneg <2 x double> %{{.+}}
// CHECK: call <2 x double> @llvm.fma.v2f64(<2 x double> %{{.*}}, <2 x double> %{{.*}}, <2 x double> %{{.*}})
return _mm_fnmsub_pd(a, b, c);
}
__m128 test_mm_fnmsub_ss(__m128 a, __m128 b, __m128 c) {
// CHECK-LABEL: test_mm_fnmsub_ss
// CHECK: [[NEG:%.+]] = fneg <4 x float> %{{.+}}
// CHECK: [[NEG2:%.+]] = fneg <4 x float> %{{.+}}
// CHECK: extractelement <4 x float> %{{.*}}, i64 0
// CHECK: extractelement <4 x float> %{{.*}}, i64 0
// CHECK: extractelement <4 x float> %{{.*}}, i64 0
// CHECK: call float @llvm.fma.f32(float %{{.*}}, float %{{.*}}, float %{{.*}})
// CHECK: insertelement <4 x float> %{{.*}}, float %{{.*}}, i64 0
return _mm_fnmsub_ss(a, b, c);
}
__m128d test_mm_fnmsub_sd(__m128d a, __m128d b, __m128d c) {
// CHECK-LABEL: test_mm_fnmsub_sd
// CHECK: [[NEG:%.+]] = fneg <2 x double> %{{.+}}
// CHECK: [[NEG2:%.+]] = fneg <2 x double> %{{.+}}
// CHECK: extractelement <2 x double> %{{.*}}, i64 0
// CHECK: extractelement <2 x double> %{{.*}}, i64 0
// CHECK: extractelement <2 x double> %{{.*}}, i64 0
// CHECK: call double @llvm.fma.f64(double %{{.*}}, double %{{.*}}, double %{{.*}})
// CHECK: insertelement <2 x double> %{{.*}}, double %{{.*}}, i64 0
return _mm_fnmsub_sd(a, b, c);
}
__m128 test_mm_fmaddsub_ps(__m128 a, __m128 b, __m128 c) {
// CHECK-LABEL: test_mm_fmaddsub_ps
// CHECK-NOT: fneg
// CHECK: call <4 x float> @llvm.x86.fma.vfmaddsub.ps(<4 x float> %{{.*}}, <4 x float> %{{.*}}, <4 x float> %{{.*}})
return _mm_fmaddsub_ps(a, b, c);
}
__m128d test_mm_fmaddsub_pd(__m128d a, __m128d b, __m128d c) {
// CHECK-LABEL: test_mm_fmaddsub_pd
// CHECK-NOT: fneg
// CHECK: call <2 x double> @llvm.x86.fma.vfmaddsub.pd(<2 x double> %{{.*}}, <2 x double> %{{.*}}, <2 x double> %{{.*}})
return _mm_fmaddsub_pd(a, b, c);
}
__m128 test_mm_fmsubadd_ps(__m128 a, __m128 b, __m128 c) {
// CHECK-LABEL: test_mm_fmsubadd_ps
// CHECK: [[NEG:%.+]] = fneg <4 x float> %{{.+}}
// CHECK: call <4 x float> @llvm.x86.fma.vfmaddsub.ps(<4 x float> %{{.*}}, <4 x float> %{{.*}}, <4 x float> [[NEG]])
return _mm_fmsubadd_ps(a, b, c);
}
__m128d test_mm_fmsubadd_pd(__m128d a, __m128d b, __m128d c) {
// CHECK-LABEL: test_mm_fmsubadd_pd
// CHECK: [[NEG:%.+]] = fneg <2 x double> %{{.+}}
// CHECK: call <2 x double> @llvm.x86.fma.vfmaddsub.pd(<2 x double> %{{.*}}, <2 x double> %{{.*}}, <2 x double> [[NEG]])
return _mm_fmsubadd_pd(a, b, c);
}
__m256 test_mm256_fmadd_ps(__m256 a, __m256 b, __m256 c) {
// CHECK-LABEL: test_mm256_fmadd_ps
// CHECK: call <8 x float> @llvm.fma.v8f32(<8 x float> %{{.*}}, <8 x float> %{{.*}}, <8 x float> %{{.*}})
return _mm256_fmadd_ps(a, b, c);
}
__m256d test_mm256_fmadd_pd(__m256d a, __m256d b, __m256d c) {
// CHECK-LABEL: test_mm256_fmadd_pd
// CHECK: call <4 x double> @llvm.fma.v4f64(<4 x double> %{{.*}}, <4 x double> %{{.*}}, <4 x double> %{{.*}})
return _mm256_fmadd_pd(a, b, c);
}
__m256 test_mm256_fmsub_ps(__m256 a, __m256 b, __m256 c) {
// CHECK-LABEL: test_mm256_fmsub_ps
// CHECK: [[NEG:%.+]] = fneg <8 x float> %{{.*}}
// CHECK: call <8 x float> @llvm.fma.v8f32(<8 x float> %{{.*}}, <8 x float> %{{.*}}, <8 x float> %{{.*}})
return _mm256_fmsub_ps(a, b, c);
}
__m256d test_mm256_fmsub_pd(__m256d a, __m256d b, __m256d c) {
// CHECK-LABEL: test_mm256_fmsub_pd
// CHECK: [[NEG:%.+]] = fneg <4 x double> %{{.+}}
// CHECK: call <4 x double> @llvm.fma.v4f64(<4 x double> %{{.*}}, <4 x double> %{{.*}}, <4 x double> %{{.*}})
return _mm256_fmsub_pd(a, b, c);
}
__m256 test_mm256_fnmadd_ps(__m256 a, __m256 b, __m256 c) {
// CHECK-LABEL: test_mm256_fnmadd_ps
// CHECK: [[NEG:%.+]] = fneg <8 x float> %{{.*}}
// CHECK: call <8 x float> @llvm.fma.v8f32(<8 x float> %{{.*}}, <8 x float> %{{.*}}, <8 x float> %{{.*}})
return _mm256_fnmadd_ps(a, b, c);
}
__m256d test_mm256_fnmadd_pd(__m256d a, __m256d b, __m256d c) {
// CHECK-LABEL: test_mm256_fnmadd_pd
// CHECK: [[NEG:%.+]] = fneg <4 x double> %{{.+}}
// CHECK: call <4 x double> @llvm.fma.v4f64(<4 x double> %{{.*}}, <4 x double> %{{.*}}, <4 x double> %{{.*}})
return _mm256_fnmadd_pd(a, b, c);
}
__m256 test_mm256_fnmsub_ps(__m256 a, __m256 b, __m256 c) {
// CHECK-LABEL: test_mm256_fnmsub_ps
// CHECK: [[NEG:%.+]] = fneg <8 x float> %{{.*}}
// CHECK: [[NEG2:%.+]] = fneg <8 x float> %{{.*}}
// CHECK: call <8 x float> @llvm.fma.v8f32(<8 x float> %{{.*}}, <8 x float> %{{.*}}, <8 x float> %{{.*}})
return _mm256_fnmsub_ps(a, b, c);
}
__m256d test_mm256_fnmsub_pd(__m256d a, __m256d b, __m256d c) {
// CHECK-LABEL: test_mm256_fnmsub_pd
// CHECK: [[NEG:%.+]] = fneg <4 x double> %{{.+}}
// CHECK: [[NEG2:%.+]] = fneg <4 x double> %{{.+}}
// CHECK: call <4 x double> @llvm.fma.v4f64(<4 x double> %{{.*}}, <4 x double> %{{.*}}, <4 x double> %{{.*}})
return _mm256_fnmsub_pd(a, b, c);
}
__m256 test_mm256_fmaddsub_ps(__m256 a, __m256 b, __m256 c) {
// CHECK-LABEL: test_mm256_fmaddsub_ps
// CHECK-NOT: fneg
// CHECK: call <8 x float> @llvm.x86.fma.vfmaddsub.ps.256(<8 x float> %{{.*}}, <8 x float> %{{.*}}, <8 x float> %{{.*}})
return _mm256_fmaddsub_ps(a, b, c);
}
__m256d test_mm256_fmaddsub_pd(__m256d a, __m256d b, __m256d c) {
// CHECK-LABEL: test_mm256_fmaddsub_pd
// CHECK-NOT: fneg
// CHECK: call <4 x double> @llvm.x86.fma.vfmaddsub.pd.256(<4 x double> %{{.*}}, <4 x double> %{{.*}}, <4 x double> %{{.*}})
return _mm256_fmaddsub_pd(a, b, c);
}
__m256 test_mm256_fmsubadd_ps(__m256 a, __m256 b, __m256 c) {
// CHECK-LABEL: test_mm256_fmsubadd_ps
// CHECK: [[NEG:%.+]] = fneg <8 x float> %{{.+}}
// CHECK: call <8 x float> @llvm.x86.fma.vfmaddsub.ps.256(<8 x float> %{{.*}}, <8 x float> %{{.*}}, <8 x float> [[NEG]])
return _mm256_fmsubadd_ps(a, b, c);
}
__m256d test_mm256_fmsubadd_pd(__m256d a, __m256d b, __m256d c) {
// CHECK-LABEL: test_mm256_fmsubadd_pd
// CHECK: [[NEG:%.+]] = fneg <4 x double> %{{.+}}
// CHECK: call <4 x double> @llvm.x86.fma.vfmaddsub.pd.256(<4 x double> %{{.*}}, <4 x double> %{{.*}}, <4 x double> [[NEG]])
return _mm256_fmsubadd_pd(a, b, c);
}
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