mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-06 21:05:51 +00:00
d4167d0b29
This patch adds tablegen patterns to select F16C float-to-half-float conversion instructions from 'f32_to_f16' and 'f16_to_f32' dag nodes. If the target doesn't have F16C, then 'f32_to_f16' and 'f16_to_f32' are expanded into library calls. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212293 91177308-0d34-0410-b5e6-96231b3b80d8
65 lines
2.3 KiB
LLVM
65 lines
2.3 KiB
LLVM
; 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
|
|
|