mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-13 14:50:17 +00:00
688903eb3e
* 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.
48 lines
1.7 KiB
C
48 lines
1.7 KiB
C
/* Round a float value to a long long in the current rounding mode.
|
|
Copyright (C) 1997-2018 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>
|
|
#include <stdint.h>
|
|
#include <libm-alias-float.h>
|
|
|
|
long long int
|
|
__llrintf (float x)
|
|
{
|
|
float rx = __rintf (x);
|
|
if (HAVE_PPC_FCTIDZ || rx != x)
|
|
return (long long int) rx;
|
|
else
|
|
{
|
|
float arx = fabsf (rx);
|
|
/* Avoid incorrect exceptions from libgcc conversions (as of GCC
|
|
5): <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59412>. */
|
|
if (arx < 0x1p31f)
|
|
return (long long int) (long int) rx;
|
|
else if (!(arx < 0x1p55f))
|
|
return (long long int) (long int) (rx * 0x1p-32f) << 32;
|
|
uint32_t i0;
|
|
GET_FLOAT_WORD (i0, rx);
|
|
int exponent = ((i0 >> 23) & 0xff) - 0x7f;
|
|
unsigned long long int mant = (i0 & 0x7fffff) | 0x800000;
|
|
mant <<= exponent - 23;
|
|
return (long long int) ((i0 & 0x80000000) != 0 ? -mant : mant);
|
|
}
|
|
}
|
|
libm_alias_float (__llrint, llrint)
|