mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-12 14:20:13 +00:00
04277e02d7
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
87 lines
2.2 KiB
C
87 lines
2.2 KiB
C
/* Return the least floating-point number greater than X.
|
|
Copyright (C) 2016-2019 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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <float.h>
|
|
#include <math.h>
|
|
#include <math_private.h>
|
|
#include <libm-alias-ldouble.h>
|
|
|
|
/* Return the least floating-point number greater than X. */
|
|
long double
|
|
__nextupl (long double x)
|
|
{
|
|
uint32_t hx, ix;
|
|
uint32_t lx;
|
|
int32_t esx;
|
|
|
|
GET_LDOUBLE_WORDS (esx, hx, lx, x);
|
|
ix = esx & 0x7fff;
|
|
|
|
if (((ix == 0x7fff) && (((hx & 0x7fffffff) | lx) != 0))) /* x is nan. */
|
|
return x + x;
|
|
if ((ix | hx | lx) == 0)
|
|
return LDBL_TRUE_MIN;
|
|
if (esx >= 0)
|
|
{ /* x > 0. */
|
|
if (isinf (x))
|
|
return x;
|
|
lx += 1;
|
|
if (lx == 0)
|
|
{
|
|
hx += 1;
|
|
#if LDBL_MIN_EXP == -16381
|
|
if (hx == 0 || (esx == 0 && hx == 0x80000000))
|
|
#else
|
|
if (hx == 0)
|
|
#endif
|
|
{
|
|
esx += 1;
|
|
hx |= 0x80000000;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{ /* x < 0. */
|
|
if (lx == 0)
|
|
{
|
|
#if LDBL_MIN_EXP == -16381
|
|
if (hx <= 0x80000000 && esx != 0xffff8000)
|
|
{
|
|
esx -= 1;
|
|
hx = hx - 1;
|
|
if ((esx & 0x7fff) > 0)
|
|
hx |= 0x80000000;
|
|
}
|
|
else
|
|
hx -= 1;
|
|
#else
|
|
if (ix != 0 && hx == 0x80000000)
|
|
hx = 0;
|
|
if (hx == 0)
|
|
esx -= 1;
|
|
hx -= 1;
|
|
#endif
|
|
}
|
|
lx -= 1;
|
|
}
|
|
SET_LDOUBLE_WORDS (x, esx, hx, lx);
|
|
return x;
|
|
}
|
|
|
|
libm_alias_ldouble (__nextup, nextup)
|