mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-21 01:12:26 +08:00
39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
/* Copyright (C) 2017-2024 Free Software Foundation, Inc.
|
|
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library. If not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <math.h>
|
|
#include <fenv_private.h>
|
|
|
|
int
|
|
__fpclassifyf (float x)
|
|
{
|
|
int cls;
|
|
asm volatile ("fclass.s \t%0, %1" : "=f" (cls) : "f" (x));
|
|
|
|
if (__glibc_likely (!!(cls & _FCLASS_NORM)))
|
|
return FP_NORMAL;
|
|
if (__glibc_likely (!!(cls & _FCLASS_ZERO)))
|
|
return FP_ZERO;
|
|
if (__glibc_likely (!!(cls & _FCLASS_SUBNORM)))
|
|
return FP_SUBNORMAL;
|
|
if (__glibc_likely (!!(cls & _FCLASS_INF)))
|
|
return FP_INFINITE;
|
|
return FP_NAN;
|
|
}
|
|
libm_hidden_def (__fpclassifyf)
|