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29 lines
819 B
LLVM
29 lines
819 B
LLVM
; RUN: llc -fast-isel -fast-isel-abort=1 -asm-verbose=false -mtriple=x86_64-unknown-unknown -mattr=+f16c < %s | FileCheck %s
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; Verify that fast-isel correctly expands float-half conversions.
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define i16 @test_fp32_to_fp16(float %a) {
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; CHECK-LABEL: test_fp32_to_fp16:
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; CHECK: vcvtps2ph $4, %xmm0, %xmm0
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; CHECK-NEXT: vmovd %xmm0, %eax
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; CHECK-NEXT: retq
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entry:
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%0 = call i16 @llvm.convert.to.fp16.f32(float %a)
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ret i16 %0
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}
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define float @test_fp16_to_fp32(i32 %a) {
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; CHECK-LABEL: test_fp16_to_fp32:
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; CHECK: movswl %di, %eax
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; CHECK-NEXT: vmovd %eax, %xmm0
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; CHECK-NEXT: vcvtph2ps %xmm0, %xmm0
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; CHECK-NEXT: retq
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entry:
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%0 = trunc i32 %a to i16
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%1 = call float @llvm.convert.from.fp16.f32(i16 %0)
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ret float %1
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}
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declare i16 @llvm.convert.to.fp16.f32(float)
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declare float @llvm.convert.from.fp16.f32(i16)
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