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/* Total order operation.
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 <nan-high-order-bit.h>
#include <libm-alias-double.h>
#include <stdint.h>
#include <shlib-compat.h>
#include <first-versions.h>
int
__totalorder (const double *x, const double *y)
{
int64_t ix, iy;
EXTRACT_WORDS64 (ix, *x);
EXTRACT_WORDS64 (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 & 0x7fffffffffffffffULL) > 0x7ff0000000000000ULL
&& (iy & 0x7fffffffffffffffULL) > 0x7ff0000000000000ULL)
{
ix ^= 0x0008000000000000ULL;
iy ^= 0x0008000000000000ULL;
}
#endif
uint64_t ix_sign = ix >> 63;
uint64_t iy_sign = iy >> 63;
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_double (__totalorder, totalorder)
#if SHLIB_COMPAT (libm, GLIBC_2_25, GLIBC_2_31)
int
attribute_compat_text_section
__totalorder_compat (double x, double y)
{
return __totalorder (&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_double (__totalorder_compat, totalorder)
#endif
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