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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=corei7 -mattr=-f16c | FileCheck %s -check-prefix=LIBCALL
; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=corei7 -mattr=+f16c | FileCheck %s -check-prefix=F16C
; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=corei7 -mattr=-f16c,+soft-float | FileCheck %s -check-prefix=SOFTFLOAT
; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=corei7 -mattr=+f16c,+soft-float | FileCheck %s -check-prefix=SOFTFLOAT
; This is a test for float to half float conversions on x86-64.
;
; If flag -soft-float is set, or if there is no F16C support, then:
; 1) half float to float conversions are
; translated into calls to __gnu_h2f_ieee defined
; by the compiler runtime library;
; 2) float to half float conversions are translated into calls
; to __gnu_f2h_ieee which expected to be defined by the
; compiler runtime library.
;
; Otherwise (we have F16C support):
; 1) half float to float conversion are translated using
; vcvtph2ps instructions;
; 2) float to half float conversions are translated using
; vcvtps2ph instructions
define void @test1(float %src, ptr %dest) nounwind {
; LIBCALL-LABEL: test1:
; LIBCALL: # %bb.0:
; LIBCALL-NEXT: pushq %rbx
; LIBCALL-NEXT: movq %rdi, %rbx
; LIBCALL-NEXT: callq __truncsfhf2@PLT
; LIBCALL-NEXT: pextrw $0, %xmm0, (%rbx)
; LIBCALL-NEXT: popq %rbx
; LIBCALL-NEXT: retq
;
; F16C-LABEL: test1:
; F16C: # %bb.0:
; F16C-NEXT: vcvtps2ph $4, %xmm0, %xmm0
; F16C-NEXT: vmovd %xmm0, %eax
; F16C-NEXT: movw %ax, (%rdi)
; F16C-NEXT: retq
;
; SOFTFLOAT-LABEL: test1:
; SOFTFLOAT: # %bb.0:
; SOFTFLOAT-NEXT: pushq %rbx
; SOFTFLOAT-NEXT: movq %rsi, %rbx
; SOFTFLOAT-NEXT: callq __gnu_f2h_ieee@PLT
; SOFTFLOAT-NEXT: movw %ax, (%rbx)
; SOFTFLOAT-NEXT: popq %rbx
; SOFTFLOAT-NEXT: retq
%1 = tail call i16 @llvm.convert.to.fp16.f32(float %src)
store i16 %1, ptr %dest, align 2
ret void
}
define float @test2(ptr nocapture %src) nounwind {
; LIBCALL-LABEL: test2:
; LIBCALL: # %bb.0:
; LIBCALL-NEXT: pinsrw $0, (%rdi), %xmm0
; LIBCALL-NEXT: jmp __extendhfsf2@PLT # TAILCALL
;
; F16C-LABEL: test2:
; F16C: # %bb.0:
; F16C-NEXT: movzwl (%rdi), %eax
; F16C-NEXT: vmovd %eax, %xmm0
; F16C-NEXT: vcvtph2ps %xmm0, %xmm0
; F16C-NEXT: retq
;
; SOFTFLOAT-LABEL: test2:
; SOFTFLOAT: # %bb.0:
; SOFTFLOAT-NEXT: pushq %rax
; SOFTFLOAT-NEXT: movzwl (%rdi), %edi
; SOFTFLOAT-NEXT: callq __gnu_h2f_ieee@PLT
; SOFTFLOAT-NEXT: popq %rcx
; SOFTFLOAT-NEXT: retq
%1 = load i16, ptr %src, align 2
%2 = tail call float @llvm.convert.from.fp16.f32(i16 %1)
ret float %2
}
define float @test3(float %src) nounwind uwtable readnone {
; LIBCALL-LABEL: test3:
; LIBCALL: # %bb.0:
; LIBCALL-NEXT: pushq %rax
; LIBCALL-NEXT: .cfi_def_cfa_offset 16
; LIBCALL-NEXT: callq __truncsfhf2@PLT
; LIBCALL-NEXT: popq %rax
; LIBCALL-NEXT: .cfi_def_cfa_offset 8
; LIBCALL-NEXT: jmp __extendhfsf2@PLT # TAILCALL
;
; F16C-LABEL: test3:
; F16C: # %bb.0:
; F16C-NEXT: vcvtps2ph $4, %xmm0, %xmm0
; F16C-NEXT: vcvtph2ps %xmm0, %xmm0
; F16C-NEXT: retq
;
; SOFTFLOAT-LABEL: test3:
; SOFTFLOAT: # %bb.0:
; SOFTFLOAT-NEXT: pushq %rax
; SOFTFLOAT-NEXT: .cfi_def_cfa_offset 16
; SOFTFLOAT-NEXT: callq __gnu_f2h_ieee@PLT
; SOFTFLOAT-NEXT: movzwl %ax, %edi
; SOFTFLOAT-NEXT: callq __gnu_h2f_ieee@PLT
; SOFTFLOAT-NEXT: popq %rcx
; SOFTFLOAT-NEXT: .cfi_def_cfa_offset 8
; SOFTFLOAT-NEXT: retq
%1 = tail call i16 @llvm.convert.to.fp16.f32(float %src)
%2 = tail call float @llvm.convert.from.fp16.f32(i16 %1)
ret float %2
}
define double @test4(ptr nocapture %src) nounwind {
; LIBCALL-LABEL: test4:
; LIBCALL: # %bb.0:
; LIBCALL-NEXT: pushq %rax
; LIBCALL-NEXT: pinsrw $0, (%rdi), %xmm0
; LIBCALL-NEXT: callq __extendhfsf2@PLT
; LIBCALL-NEXT: cvtss2sd %xmm0, %xmm0
; LIBCALL-NEXT: popq %rax
; LIBCALL-NEXT: retq
;
; F16C-LABEL: test4:
; F16C: # %bb.0:
; F16C-NEXT: movzwl (%rdi), %eax
; F16C-NEXT: vmovd %eax, %xmm0
; F16C-NEXT: vcvtph2ps %xmm0, %xmm0
; F16C-NEXT: vcvtss2sd %xmm0, %xmm0, %xmm0
; F16C-NEXT: retq
;
; SOFTFLOAT-LABEL: test4:
; SOFTFLOAT: # %bb.0:
; SOFTFLOAT-NEXT: pushq %rax
; SOFTFLOAT-NEXT: movzwl (%rdi), %edi
; SOFTFLOAT-NEXT: callq __gnu_h2f_ieee@PLT
; SOFTFLOAT-NEXT: movl %eax, %edi
; SOFTFLOAT-NEXT: callq __extendsfdf2@PLT
; SOFTFLOAT-NEXT: popq %rcx
; SOFTFLOAT-NEXT: retq
%1 = load i16, ptr %src, align 2
%2 = tail call double @llvm.convert.from.fp16.f64(i16 %1)
ret double %2
}
define i16 @test5(double %src) nounwind {
; LIBCALL-LABEL: test5:
; LIBCALL: # %bb.0:
; LIBCALL-NEXT: pushq %rax
; LIBCALL-NEXT: callq __truncdfhf2@PLT
; LIBCALL-NEXT: pextrw $0, %xmm0, %eax
; LIBCALL-NEXT: # kill: def $ax killed $ax killed $eax
; LIBCALL-NEXT: popq %rcx
; LIBCALL-NEXT: retq
;
; F16C-LABEL: test5:
; F16C: # %bb.0:
; F16C-NEXT: pushq %rax
; F16C-NEXT: callq __truncdfhf2@PLT
; F16C-NEXT: vpextrw $0, %xmm0, %eax
; F16C-NEXT: # kill: def $ax killed $ax killed $eax
; F16C-NEXT: popq %rcx
; F16C-NEXT: retq
;
; SOFTFLOAT-LABEL: test5:
; SOFTFLOAT: # %bb.0:
; SOFTFLOAT-NEXT: pushq %rax
; SOFTFLOAT-NEXT: callq __truncdfhf2@PLT
; SOFTFLOAT-NEXT: popq %rcx
; SOFTFLOAT-NEXT: retq
%val = tail call i16 @llvm.convert.to.fp16.f64(double %src)
ret i16 %val
}
declare float @llvm.convert.from.fp16.f32(i16) nounwind readnone
declare i16 @llvm.convert.to.fp16.f32(float) nounwind readnone
declare double @llvm.convert.from.fp16.f64(i16) nounwind readnone
declare i16 @llvm.convert.to.fp16.f64(double) nounwind readnone
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