fastmath-float-half-conversion.ll
2.73 KB
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; 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 {
; F16C-LABEL: test1_fast:
; F16C: # %bb.0: # %entry
; F16C-NEXT: vcvtsd2ss %xmm0, %xmm0, %xmm0
; F16C-NEXT: vcvtps2ph $4, %xmm0, %xmm0
; F16C-NEXT: vmovd %xmm0, %eax
; F16C-NEXT: # kill: def $ax killed $ax killed $eax
; F16C-NEXT: retq
;
; AVX-LABEL: test1_fast:
; AVX: # %bb.0: # %entry
; AVX-NEXT: pushq %rax
; AVX-NEXT: .cfi_def_cfa_offset 16
; AVX-NEXT: callq __truncdfhf2
; AVX-NEXT: popq %rcx
; AVX-NEXT: .cfi_def_cfa_offset 8
; AVX-NEXT: retq
entry:
%0 = tail call i16 @llvm.convert.to.fp16.f64(double %d)
ret i16 %0
}
define zeroext i16 @test2_fast(x86_fp80 %d) #0 {
; F16C-LABEL: test2_fast:
; F16C: # %bb.0: # %entry
; F16C-NEXT: fldt {{[0-9]+}}(%rsp)
; F16C-NEXT: fstps -{{[0-9]+}}(%rsp)
; F16C-NEXT: vmovss {{.*#+}} xmm0 = mem[0],zero,zero,zero
; F16C-NEXT: vcvtps2ph $4, %xmm0, %xmm0
; F16C-NEXT: vmovd %xmm0, %eax
; F16C-NEXT: # kill: def $ax killed $ax killed $eax
; F16C-NEXT: retq
;
; AVX-LABEL: test2_fast:
; AVX: # %bb.0: # %entry
; AVX-NEXT: subq $24, %rsp
; AVX-NEXT: .cfi_def_cfa_offset 32
; AVX-NEXT: fldt {{[0-9]+}}(%rsp)
; AVX-NEXT: fstpt (%rsp)
; AVX-NEXT: callq __truncxfhf2
; AVX-NEXT: addq $24, %rsp
; AVX-NEXT: .cfi_def_cfa_offset 8
; AVX-NEXT: retq
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: # %bb.0: # %entry
; ALL-NEXT: pushq %rax
; ALL-NEXT: .cfi_def_cfa_offset 16
; ALL-NEXT: callq __truncdfhf2
; ALL-NEXT: popq %rcx
; ALL-NEXT: .cfi_def_cfa_offset 8
; ALL-NEXT: retq
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: # %bb.0: # %entry
; ALL-NEXT: subq $24, %rsp
; ALL-NEXT: .cfi_def_cfa_offset 32
; ALL-NEXT: fldt {{[0-9]+}}(%rsp)
; ALL-NEXT: fstpt (%rsp)
; ALL-NEXT: callq __truncxfhf2
; ALL-NEXT: addq $24, %rsp
; ALL-NEXT: .cfi_def_cfa_offset 8
; ALL-NEXT: retq
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" }