mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-01 17:30:07 +00:00
76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
/* Total order operation on absolute values. ldbl-128ibm 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 <nan-high-order-bit.h>
|
|
#include <stdint.h>
|
|
#include <shlib-compat.h>
|
|
|
|
int
|
|
__totalordermagl (const long double *x, const long double *y)
|
|
{
|
|
double xhi, xlo, yhi, ylo;
|
|
int64_t hx, hy, lx, ly;
|
|
|
|
ldbl_unpack (*x, &xhi, &xlo);
|
|
EXTRACT_WORDS64 (hx, xhi);
|
|
ldbl_unpack (*y, &yhi, &ylo);
|
|
EXTRACT_WORDS64 (hy, yhi);
|
|
#if HIGH_ORDER_BIT_IS_SET_FOR_SNAN
|
|
# error not implemented
|
|
#endif
|
|
uint64_t x_sign = hx & 0x8000000000000000ULL;
|
|
uint64_t y_sign = hy & 0x8000000000000000ULL;
|
|
hx ^= x_sign;
|
|
hy ^= y_sign;
|
|
if (hx < hy)
|
|
return 1;
|
|
else if (hx > hy)
|
|
return 0;
|
|
|
|
/* The high doubles are identical. If they are NaNs or both the low
|
|
parts are zero, the low parts are not significant (and if they
|
|
are infinities, both the low parts must be zero). */
|
|
if (hx >= 0x7ff0000000000000ULL)
|
|
return 1;
|
|
EXTRACT_WORDS64 (lx, xlo);
|
|
EXTRACT_WORDS64 (ly, ylo);
|
|
if (((lx | ly) & 0x7fffffffffffffffULL) == 0)
|
|
return 1;
|
|
lx ^= x_sign;
|
|
ly ^= y_sign;
|
|
|
|
/* Otherwise compare the low parts. */
|
|
uint64_t lx_sign = lx >> 63;
|
|
uint64_t ly_sign = ly >> 63;
|
|
lx ^= lx_sign >> 1;
|
|
ly ^= ly_sign >> 1;
|
|
return lx <= ly;
|
|
}
|
|
versioned_symbol (libm, __totalordermagl, totalordermagl, GLIBC_2_31);
|
|
#if SHLIB_COMPAT (libm, GLIBC_2_25, GLIBC_2_31)
|
|
int
|
|
attribute_compat_text_section
|
|
__totalordermag_compatl (long double x, long double y)
|
|
{
|
|
return __totalordermagl (&x, &y);
|
|
}
|
|
compat_symbol (libm, __totalordermag_compatl, totalordermagl, GLIBC_2_25);
|
|
#endif
|