mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-27 05:00:15 +00:00
41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
/* Round argument to nearest integral value according to current rounding
|
|
direction.
|
|
Copyright (C) 1997, 1999 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
|
|
|
|
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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <math.h>
|
|
#include "math_private.h"
|
|
#include "mathimpl.h"
|
|
|
|
long long int
|
|
__llrintf (float x)
|
|
{
|
|
int32_t e;
|
|
u_int32_t i, s;
|
|
long long int result;
|
|
|
|
x = __m81_u(__rintf) (x);
|
|
|
|
GET_FLOAT_WORD (i, x);
|
|
|
|
e = ((i >> 23) & 0xff) - 0x7f;
|
|
if (e < 0)
|
|
return 0;
|
|
s = i;
|
|
i &= 0x7fffff;
|
|
i |= 0x800000;
|
|
|
|
if (e < 63)
|
|
{
|
|
if (e > 55)
|
|
result = (long long int) (i << (e - 55)) << 32;
|
|
else if (e > 31)
|
|
result = (((long long int) (i >> (55 - e)) << 32) | (i << (e - 23)));
|
|
else if (e > 23)
|
|
result = i << (e - 23);
|
|
else
|
|
result = i >> (23 - e);
|
|
if (s & 0x80000000)
|
|
result = -result;
|
|
}
|
|
else
|
|
/* The number is too large or not finite. The standard leaves it
|
|
undefined what to return when the number is too large to fit in a
|
|
`long long int'. */
|
|
result = -1LL;
|
|
|
|
return result;
|
|
}
|
|
|
|
weak_alias (__llrintf, llrintf)
|