diff options
Diffstat (limited to 'test/CodeGen/X86/fast-isel-float-half-convertion.ll')
| -rw-r--r-- | test/CodeGen/X86/fast-isel-float-half-convertion.ll | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/test/CodeGen/X86/fast-isel-float-half-convertion.ll b/test/CodeGen/X86/fast-isel-float-half-convertion.ll new file mode 100644 index 0000000..ee89bcd --- /dev/null +++ b/test/CodeGen/X86/fast-isel-float-half-convertion.ll @@ -0,0 +1,28 @@ +; RUN: llc -fast-isel -fast-isel-abort -asm-verbose=false -mtriple=x86_64-unknown-unknown -mattr=+f16c < %s | FileCheck %s + +; Verify that fast-isel correctly expands float-half conversions. + +define i16 @test_fp32_to_fp16(float %a) { +; CHECK-LABEL: test_fp32_to_fp16: +; CHECK: vcvtps2ph $0, %xmm0, %xmm0 +; CHECK-NEXT: vmovd %xmm0, %eax +; CHECK-NEXT: retq +entry: + %0 = call i16 @llvm.convert.to.fp16.f32(float %a) + ret i16 %0 +} + +define float @test_fp16_to_fp32(i32 %a) { +; CHECK-LABEL: test_fp16_to_fp32: +; CHECK: movswl %di, %eax +; CHECK-NEXT: vmovd %eax, %xmm0 +; CHECK-NEXT: vcvtph2ps %xmm0, %xmm0 +; CHECK-NEXT: retq +entry: + %0 = trunc i32 %a to i16 + %1 = call float @llvm.convert.from.fp16.f32(i16 %0) + ret float %1 +} + +declare i16 @llvm.convert.to.fp16.f32(float) +declare float @llvm.convert.from.fp16.f32(i16) |