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/* Return the least floating-point number greater than X.
Copyright (C) 2016 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. */
long double
__nextupl (long double 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)
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