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[PowerPC] Replace subtract-from-zero float in version with fneg in Po…
…werPC special fma compiler builtins This patch adds a test for the PowerPC fma compiler builtins, some variations of which negate inputs and outputs. The code to generate IR for these builtins was untested before this patch. Originally, the code used the outdated method of subtracting floating point values from -0.0 as floating point negation. This patch remedies that. Patch by: Drew Wock <drew.wock@sas.com> Differential Revision: https://reviews.llvm.org/D76949
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// RUN: %clang_cc1 -triple powerpc64le-gnu-linux \ | ||
// RUN: -target-feature +altivec -Wall -Wno-unused -Werror -emit-llvm %s -o - | FileCheck \ | ||
// RUN: %s | ||
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typedef __attribute__((vector_size(4 * sizeof(float)))) float vec_float; | ||
typedef __attribute__((vector_size(2 * sizeof(double)))) double vec_double; | ||
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volatile vec_double vd; | ||
volatile vec_float vf; | ||
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void test_fma(void) { | ||
vf = __builtin_vsx_xvmaddasp(vf, vf, vf); | ||
// CHECK: @llvm.fma.v4f32(<4 x float> %{{.*}}, <4 x float> %{{.*}}, <4 x float> %{{.*}}) | ||
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vd = __builtin_vsx_xvmaddadp(vd, vd, vd); | ||
// CHECK: @llvm.fma.v2f64(<2 x double> %{{.*}}, <2 x double> %{{.*}}, <2 x double> %{{.*}}) | ||
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vf = __builtin_vsx_xvnmaddasp(vf, vf, vf); | ||
// CHECK: [[RESULT:%[^ ]+]] = call <4 x float> @llvm.fma.v4f32(<4 x float> %{{.*}}, <4 x float> %{{.*}}, <4 x float> %{{.*}}) | ||
// CHECK: fneg <4 x float> [[RESULT]] | ||
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vd = __builtin_vsx_xvnmaddadp(vd, vd, vd); | ||
// CHECK: [[RESULT:%[^ ]+]] = call <2 x double> @llvm.fma.v2f64(<2 x double> %{{.*}}, <2 x double> %{{.*}}, <2 x double> %{{.*}}) | ||
// CHECK: fneg <2 x double> [[RESULT]] | ||
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vf = __builtin_vsx_xvmsubasp(vf, vf, vf); | ||
// CHECK: [[RESULT:%[^ ]+]] fneg <4 x float> %{{.*}} | ||
// CHECK: @llvm.fma.v4f32(<4 x float> %{{.*}}, <4 x float> %{{.*}}, <4 x float> [[RESULT]]) | ||
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vd = __builtin_vsx_xvmsubadp(vd, vd, vd); | ||
// CHECK: fneg <2 x double> [[RESULT]] | ||
// CHECK: [[RESULT:%[^ ]+]] = call <2 x double> @llvm.fma.v2f64(<2 x double> %{{.*}}, <2 x double> %{{.*}}, <2 x double> %{{.*}}) | ||
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vf = __builtin_vsx_xvnmsubasp(vf, vf, vf); | ||
// CHECK: [[RESULT:%[^ ]+]] = fneg <4 x float> %{{.*}} | ||
// CHECK: [[RESULT2:%[^ ]+]] = call <4 x float> @llvm.fma.v2f64(<4 x float> %{{.*}}, <4 x float> %{{.*}}, <4 x float> [[RESULT]]) | ||
// CHECK: fneg <4 x float> [[RESULT2]] | ||
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vd = __builtin_vsx_xvnmsubadp(vd, vd, vd); | ||
// CHECK: [[RESULT:%[^ ]+]] = fneg <2 x double> %{{.*}} | ||
// CHECK: [[RESULT2:%[^ ]+]] = call <2 x double> @llvm.fma.v2f64(<2 x double> %{{.*}}, <2 x double> %{{.*}}, <2 x double> [[RESULT]]) | ||
// CHECK: fneg <2 x double> [[RESULT2]] | ||
} |