mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-02 01:40:07 +00:00
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
/* Return the least floating-point number greater than X.
|
|
Copyright (C) 2016-2017 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 <math.h>
|
|
#include <math_private.h>
|
|
|
|
/* Return the least floating-point number greater than X. */
|
|
_Float128
|
|
__nextupl (_Float128 x)
|
|
{
|
|
int64_t hx, ix;
|
|
u_int64_t lx;
|
|
|
|
GET_LDOUBLE_WORDS64 (hx, lx, x);
|
|
ix = hx & 0x7fffffffffffffffLL;
|
|
|
|
/* x is nan. */
|
|
if (((ix >= 0x7fff000000000000LL)
|
|
&& ((ix - 0x7fff000000000000LL) | lx) != 0))
|
|
return x + x;
|
|
if ((ix | lx) == 0)
|
|
return LDBL_TRUE_MIN;
|
|
if (hx >= 0)
|
|
{ /* x > 0. */
|
|
if (isinf (x))
|
|
return x;
|
|
lx++;
|
|
if (lx == 0)
|
|
hx++;
|
|
}
|
|
else
|
|
{ /* x < 0. */
|
|
if (lx == 0)
|
|
hx--;
|
|
lx--;
|
|
}
|
|
SET_LDOUBLE_WORDS64 (x, hx, lx);
|
|
return x;
|
|
}
|
|
|
|
weak_alias (__nextupl, nextupl)
|