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llvm-project/clang/test/CodeGen/fma4-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 +fma4 -emit-llvm -o - -Wall -Werror | FileCheck %s
#include <x86intrin.h>
__m128 test_mm_macc_ps(__m128 a, __m128 b, __m128 c) {
// CHECK-LABEL: test_mm_macc_ps
// CHECK: call <4 x float> @llvm.fma.v4f32(<4 x float> %{{.*}}, <4 x float> %{{.*}}, <4 x float> %{{.*}})
return _mm_macc_ps(a, b, c);
}
__m128d test_mm_macc_pd(__m128d a, __m128d b, __m128d c) {
// CHECK-LABEL: test_mm_macc_pd
// CHECK: call <2 x double> @llvm.fma.v2f64(<2 x double> %{{.*}}, <2 x double> %{{.*}}, <2 x double> %{{.*}})
return _mm_macc_pd(a, b, c);
}
__m128 test_mm_macc_ss(__m128 a, __m128 b, __m128 c) {
// CHECK-LABEL: test_mm_macc_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> zeroinitializer, float %{{.*}}, i64 0
return _mm_macc_ss(a, b, c);
}
__m128d test_mm_macc_sd(__m128d a, __m128d b, __m128d c) {
// CHECK-LABEL: test_mm_macc_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> zeroinitializer, double %{{.*}}, i64 0
return _mm_macc_sd(a, b, c);
}
__m128 test_mm_msub_ps(__m128 a, __m128 b, __m128 c) {
// CHECK-LABEL: test_mm_msub_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_msub_ps(a, b, c);
}
__m128d test_mm_msub_pd(__m128d a, __m128d b, __m128d c) {
// CHECK-LABEL: test_mm_msub_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_msub_pd(a, b, c);
}
__m128 test_mm_msub_ss(__m128 a, __m128 b, __m128 c) {
// CHECK-LABEL: test_mm_msub_ss
// CHECK: [[NEG:%.+]] = fneg <4 x float> %{{.+}}
// CHECK: extractelement <4 x float> %{{.*}}, i64 0
// CHECK: extractelement <4 x float> %{{.*}}, i64 0
// CHECK: [[C:%.+]] = extractelement <4 x float> [[NEG]], i64 0
// CHECK: call float @llvm.fma.f32(float %{{.*}}, float %{{.*}}, float [[C]])
// CHECK: insertelement <4 x float> zeroinitializer, float %{{.*}}, i64 0
return _mm_msub_ss(a, b, c);
}
__m128d test_mm_msub_sd(__m128d a, __m128d b, __m128d c) {
// CHECK-LABEL: test_mm_msub_sd
// CHECK: [[NEG:%.+]] = fneg <2 x double> %{{.+}}
// CHECK: extractelement <2 x double> %{{.*}}, i64 0
// CHECK: extractelement <2 x double> %{{.*}}, i64 0
// CHECK: [[C:%.+]] = extractelement <2 x double> [[NEG]], i64 0
// CHECK: call double @llvm.fma.f64(double %{{.*}}, double %{{.*}}, double [[C]])
// CHECK: insertelement <2 x double> zeroinitializer, double %{{.*}}, i64 0
return _mm_msub_sd(a, b, c);
}
__m128 test_mm_nmacc_ps(__m128 a, __m128 b, __m128 c) {
// CHECK-LABEL: test_mm_nmacc_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_nmacc_ps(a, b, c);
}
__m128d test_mm_nmacc_pd(__m128d a, __m128d b, __m128d c) {
// CHECK-LABEL: test_mm_nmacc_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_nmacc_pd(a, b, c);
}
__m128 test_mm_nmacc_ss(__m128 a, __m128 b, __m128 c) {
// CHECK-LABEL: test_mm_nmacc_ss
// CHECK: [[NEG:%.+]] = fneg <4 x float> %{{.+}}
// CHECK: [[A:%.+]] = extractelement <4 x float> [[NEG]], i64 0
// CHECK: extractelement <4 x float> %{{.*}}, i64 0
// CHECK: extractelement <4 x float> %{{.*}}, i64 0
// CHECK: call float @llvm.fma.f32(float [[A]], float %{{.*}}, float %{{.*}})
// CHECK: insertelement <4 x float> zeroinitializer, float %{{.*}}, i64 0
return _mm_nmacc_ss(a, b, c);
}
__m128d test_mm_nmacc_sd(__m128d a, __m128d b, __m128d c) {
// CHECK-LABEL: test_mm_nmacc_sd
// CHECK: [[NEG:%.+]] = fneg <2 x double> %{{.+}}
// CHECK: [[A:%.+]] = extractelement <2 x double> [[NEG]], i64 0
// CHECK: extractelement <2 x double> %{{.*}}, i64 0
// CHECK: extractelement <2 x double> %{{.*}}, i64 0
// CHECK: call double @llvm.fma.f64(double [[A]], double %{{.*}}, double %{{.*}})
// CHECK: insertelement <2 x double> zeroinitializer, double %{{.*}}, i64 0
return _mm_nmacc_sd(a, b, c);
}
__m128 test_mm_nmsub_ps(__m128 a, __m128 b, __m128 c) {
// CHECK-LABEL: test_mm_nmsub_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_nmsub_ps(a, b, c);
}
__m128d test_mm_nmsub_pd(__m128d a, __m128d b, __m128d c) {
// CHECK-LABEL: test_mm_nmsub_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_nmsub_pd(a, b, c);
}
__m128 test_mm_nmsub_ss(__m128 a, __m128 b, __m128 c) {
// CHECK-LABEL: test_mm_nmsub_ss
// CHECK: [[NEG:%.+]] = fneg <4 x float> %{{.+}}
// CHECK: [[NEG2:%.+]] = fneg <4 x float> %{{.+}}
// CHECK: [[A:%.+]] = extractelement <4 x float> [[NEG]], i64 0
// CHECK: extractelement <4 x float> %{{.*}}, i64 0
// CHECK: [[C:%.+]] = extractelement <4 x float> [[NEG2]], i64 0
// CHECK: call float @llvm.fma.f32(float [[A]], float %{{.*}}, float [[C]])
// CHECK: insertelement <4 x float> zeroinitializer, float %{{.*}}, i64 0
return _mm_nmsub_ss(a, b, c);
}
__m128d test_mm_nmsub_sd(__m128d a, __m128d b, __m128d c) {
// CHECK-LABEL: test_mm_nmsub_sd
// CHECK: [[NEG:%.+]] = fneg <2 x double> %{{.+}}
// CHECK: [[NEG2:%.+]] = fneg <2 x double> %{{.+}}
// CHECK: [[A:%.+]] = extractelement <2 x double> [[NEG]], i64 0
// CHECK: extractelement <2 x double> %{{.*}}, i64 0
// CHECK: [[C:%.+]] = extractelement <2 x double> [[NEG2]], i64 0
// CHECK: call double @llvm.fma.f64(double [[A]], double %{{.*}}, double [[C]])
// CHECK: insertelement <2 x double> zeroinitializer, double %{{.*}}, i64 0
return _mm_nmsub_sd(a, b, c);
}
__m128 test_mm_maddsub_ps(__m128 a, __m128 b, __m128 c) {
// CHECK-LABEL: test_mm_maddsub_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_maddsub_ps(a, b, c);
}
__m128d test_mm_maddsub_pd(__m128d a, __m128d b, __m128d c) {
// CHECK-LABEL: test_mm_maddsub_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_maddsub_pd(a, b, c);
}
__m128 test_mm_msubadd_ps(__m128 a, __m128 b, __m128 c) {
// CHECK-LABEL: test_mm_msubadd_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_msubadd_ps(a, b, c);
}
__m128d test_mm_msubadd_pd(__m128d a, __m128d b, __m128d c) {
// CHECK-LABEL: test_mm_msubadd_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_msubadd_pd(a, b, c);
}
__m256 test_mm256_macc_ps(__m256 a, __m256 b, __m256 c) {
// CHECK-LABEL: test_mm256_macc_ps
// CHECK: call <8 x float> @llvm.fma.v8f32(<8 x float> %{{.*}}, <8 x float> %{{.*}}, <8 x float> %{{.*}})
return _mm256_macc_ps(a, b, c);
}
__m256d test_mm256_macc_pd(__m256d a, __m256d b, __m256d c) {
// CHECK-LABEL: test_mm256_macc_pd
// CHECK: call <4 x double> @llvm.fma.v4f64(<4 x double> %{{.*}}, <4 x double> %{{.*}}, <4 x double> %{{.*}})
return _mm256_macc_pd(a, b, c);
}
__m256 test_mm256_msub_ps(__m256 a, __m256 b, __m256 c) {
// CHECK-LABEL: test_mm256_msub_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_msub_ps(a, b, c);
}
__m256d test_mm256_msub_pd(__m256d a, __m256d b, __m256d c) {
// CHECK-LABEL: test_mm256_msub_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_msub_pd(a, b, c);
}
__m256 test_mm256_nmacc_ps(__m256 a, __m256 b, __m256 c) {
// CHECK-LABEL: test_mm256_nmacc_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_nmacc_ps(a, b, c);
}
__m256d test_mm256_nmacc_pd(__m256d a, __m256d b, __m256d c) {
// CHECK-LABEL: test_mm256_nmacc_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_nmacc_pd(a, b, c);
}
__m256 test_mm256_nmsub_ps(__m256 a, __m256 b, __m256 c) {
// CHECK-LABEL: test_mm256_nmsub_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_nmsub_ps(a, b, c);
}
__m256d test_mm256_nmsub_pd(__m256d a, __m256d b, __m256d c) {
// CHECK-LABEL: test_mm256_nmsub_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_nmsub_pd(a, b, c);
}
__m256 test_mm256_maddsub_ps(__m256 a, __m256 b, __m256 c) {
// CHECK-LABEL: test_mm256_maddsub_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_maddsub_ps(a, b, c);
}
__m256d test_mm256_maddsub_pd(__m256d a, __m256d b, __m256d c) {
// CHECK-LABEL: test_mm256_maddsub_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_maddsub_pd(a, b, c);
}
__m256 test_mm256_msubadd_ps(__m256 a, __m256 b, __m256 c) {
// CHECK-LABEL: test_mm256_msubadd_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_msubadd_ps(a, b, c);
}
__m256d test_mm256_msubadd_pd(__m256d a, __m256d b, __m256d c) {
// CHECK-LABEL: test_mm256_msubadd_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_msubadd_pd(a, b, c);
}
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