diff options
Diffstat (limited to 'test/CodeGen/X86/fastmath-float-half-conversion.ll')
| -rw-r--r-- | test/CodeGen/X86/fastmath-float-half-conversion.ll | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/test/CodeGen/X86/fastmath-float-half-conversion.ll b/test/CodeGen/X86/fastmath-float-half-conversion.ll new file mode 100644 index 0000000..2930873 --- /dev/null +++ b/test/CodeGen/X86/fastmath-float-half-conversion.ll @@ -0,0 +1,52 @@ +; RUN: llc -mtriple=x86_64-unknown-unknown -mattr=+f16c < %s | FileCheck %s --check-prefix=ALL --check-prefix=F16C +; RUN: llc -mtriple=x86_64-unknown-unknown -mattr=+avx < %s | FileCheck %s --check-prefix=ALL --check-prefix=AVX + +define zeroext i16 @test1_fast(double %d) #0 { +; ALL-LABEL: test1_fast: +; F16C-NOT: callq {{_+}}truncdfhf2 +; F16C: vcvtsd2ss %xmm0, %xmm0, %xmm0 +; F16C-NEXT: vcvtps2ph $0, %xmm0, %xmm0 +; AVX: callq {{_+}}truncdfhf2 +; ALL: ret +entry: + %0 = tail call i16 @llvm.convert.to.fp16.f64(double %d) + ret i16 %0 +} + +define zeroext i16 @test2_fast(x86_fp80 %d) #0 { +; ALL-LABEL: test2_fast: +; F16C-NOT: callq {{_+}}truncxfhf2 +; F16C: fldt +; F16C-NEXT: fstps +; F16C-NEXT: vmovss +; F16C-NEXT: vcvtps2ph $0, %xmm0, %xmm0 +; AVX: callq {{_+}}truncxfhf2 +; ALL: ret +entry: + %0 = tail call i16 @llvm.convert.to.fp16.f80(x86_fp80 %d) + ret i16 %0 +} + +define zeroext i16 @test1(double %d) #1 { +; ALL-LABEL: test1: +; ALL: callq {{_+}}truncdfhf2 +; ALL: ret +entry: + %0 = tail call i16 @llvm.convert.to.fp16.f64(double %d) + ret i16 %0 +} + +define zeroext i16 @test2(x86_fp80 %d) #1 { +; ALL-LABEL: test2: +; ALL: callq {{_+}}truncxfhf2 +; ALL: ret +entry: + %0 = tail call i16 @llvm.convert.to.fp16.f80(x86_fp80 %d) + ret i16 %0 +} + +declare i16 @llvm.convert.to.fp16.f64(double) +declare i16 @llvm.convert.to.fp16.f80(x86_fp80) + +attributes #0 = { nounwind readnone uwtable "unsafe-fp-math"="true" "use-soft-float"="false" } +attributes #1 = { nounwind readnone uwtable "unsafe-fp-math"="false" "use-soft-float"="false" } |