mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 21:10:07 +00:00
76 lines
2.5 KiB
C
76 lines
2.5 KiB
C
/* Total order operation. flt-32 version.
|
|
Copyright (C) 2016-2023 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 <math_private.h>
|
|
#include <libm-alias-float.h>
|
|
#include <nan-high-order-bit.h>
|
|
#include <stdint.h>
|
|
#include <shlib-compat.h>
|
|
#include <first-versions.h>
|
|
|
|
int
|
|
__totalorderf (const float *x, const float *y)
|
|
{
|
|
int32_t ix, iy;
|
|
GET_FLOAT_WORD (ix, *x);
|
|
GET_FLOAT_WORD (iy, *y);
|
|
#if HIGH_ORDER_BIT_IS_SET_FOR_SNAN
|
|
/* For the preferred quiet NaN convention, this operation is a
|
|
comparison of the representations of the arguments interpreted as
|
|
sign-magnitude integers. If both arguments are NaNs, invert the
|
|
quiet/signaling bit so comparing that way works. */
|
|
if ((ix & 0x7fffffff) > 0x7f800000 && (iy & 0x7fffffff) > 0x7f800000)
|
|
{
|
|
ix ^= 0x00400000;
|
|
iy ^= 0x00400000;
|
|
}
|
|
#endif
|
|
uint32_t ix_sign = ix >> 31;
|
|
uint32_t iy_sign = iy >> 31;
|
|
ix ^= ix_sign >> 1;
|
|
iy ^= iy_sign >> 1;
|
|
return ix <= iy;
|
|
}
|
|
#ifdef SHARED
|
|
# define CONCATX(x, y) x ## y
|
|
# define CONCAT(x, y) CONCATX (x, y)
|
|
# define UNIQUE_ALIAS(name) CONCAT (name, __COUNTER__)
|
|
# define do_symbol(orig_name, name, aliasname) \
|
|
strong_alias (orig_name, name) \
|
|
versioned_symbol (libm, name, aliasname, GLIBC_2_31)
|
|
# undef weak_alias
|
|
# define weak_alias(name, aliasname) \
|
|
do_symbol (name, UNIQUE_ALIAS (name), aliasname);
|
|
#endif
|
|
libm_alias_float (__totalorder, totalorder)
|
|
#if SHLIB_COMPAT (libm, GLIBC_2_25, GLIBC_2_31)
|
|
int
|
|
attribute_compat_text_section
|
|
__totalorder_compatf (float x, float y)
|
|
{
|
|
return __totalorderf (&x, &y);
|
|
}
|
|
#undef do_symbol
|
|
#define do_symbol(orig_name, name, aliasname) \
|
|
strong_alias (orig_name, name) \
|
|
compat_symbol (libm, name, aliasname, \
|
|
CONCAT (FIRST_VERSION_libm_, aliasname))
|
|
libm_alias_float (__totalorder_compat, totalorder)
|
|
#endif
|