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; RUN: llc < %s -march=x86-64 -mtriple=x86_64-unknown-linux-gnu -mcpu=corei7 -mattr=-f16c | FileCheck %s -check-prefix=CHECK -check-prefix=LIBCALL
; RUN: llc < %s -march=x86-64 -mtriple=x86_64-unknown-linux-gnu -mcpu=corei7 -mattr=+f16c | FileCheck %s -check-prefix=CHECK -check-prefix=F16C
; RUN: llc < %s -march=x86-64 -mtriple=x86_64-unknown-linux-gnu -mcpu=corei7 -soft-float=1 -mattr=-f16c | FileCheck %s -check-prefix=CHECK -check-prefix=SOFTFLOAT
; RUN: llc < %s -march=x86-64 -mtriple=x86_64-unknown-linux-gnu -mcpu=corei7 -soft-float=1 -mattr=+f16c | FileCheck %s -check-prefix=CHECK -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, i16* %dest) {
%1 = tail call i16 @llvm.convert.to.fp16(float %src)
store i16 %1, i16* %dest, align 2
ret void
}
; CHECK-LABEL: test1
; LIBCALL: callq __gnu_f2h_ieee
; SOFTFLOAT: callq __gnu_f2h_ieee
; F16C: vcvtps2ph
; CHECK: ret
define float @test2(i16* nocapture %src) {
%1 = load i16* %src, align 2
%2 = tail call float @llvm.convert.from.fp16(i16 %1)
ret float %2
}
; CHECK-LABEL: test2:
; LIBCALL: jmp __gnu_h2f_ieee
; SOFTFLOAT: callq __gnu_h2f_ieee
; F16C: vcvtph2ps
; F16C: ret
define float @test3(float %src) nounwind uwtable readnone {
%1 = tail call i16 @llvm.convert.to.fp16(float %src)
%2 = tail call float @llvm.convert.from.fp16(i16 %1)
ret float %2
}
; CHECK-LABEL: test3:
; LIBCALL: callq __gnu_f2h_ieee
; LIBCALL: jmp __gnu_h2f_ieee
; SOFTFLOAT: callq __gnu_f2h_ieee
; SOFTFLOAT: callq __gnu_h2f_ieee
; F16C: vcvtps2ph
; F16C-NEXT: vcvtph2ps
; F16C: ret
declare float @llvm.convert.from.fp16(i16) nounwind readnone
declare i16 @llvm.convert.to.fp16(float) nounwind readnone
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