mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-29 05:51:10 +00:00
2b778ceb40
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 6694 files FOO. I then removed trailing white space from benchtests/bench-pthread-locks.c and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this diagnostic from Savannah: remote: *** pre-commit check failed ... remote: *** error: lines with trailing whitespace found remote: error: hook declined to update refs/heads/master
87 lines
2.3 KiB
C
87 lines
2.3 KiB
C
/* Round double to integer away from zero.
|
|
Copyright (C) 2011-2021 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 2011.
|
|
|
|
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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
/* Based on a version which carries the following copyright: */
|
|
|
|
/*
|
|
* ====================================================
|
|
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
|
|
*
|
|
* Developed at SunPro, a Sun Microsystems, Inc. business.
|
|
* Permission to use, copy, modify, and distribute this
|
|
* software is freely granted, provided that this notice
|
|
* is preserved.
|
|
* ====================================================
|
|
*/
|
|
|
|
#define NO_MATH_REDIRECT
|
|
#include <math.h>
|
|
#include <math_private.h>
|
|
#include <stdint.h>
|
|
#include <libm-alias-double.h>
|
|
#include <math-use-builtins.h>
|
|
|
|
/*
|
|
* floor(x)
|
|
* Return x rounded toward -inf to integral value
|
|
* Method:
|
|
* Bit twiddling.
|
|
*/
|
|
|
|
|
|
double
|
|
__floor (double x)
|
|
{
|
|
#if USE_FLOOR_BUILTIN
|
|
return __builtin_floor (x);
|
|
#else
|
|
/* Use generic implementation. */
|
|
int64_t i0;
|
|
EXTRACT_WORDS64 (i0, x);
|
|
int32_t j0 = ((i0 >> 52) & 0x7ff) - 0x3ff;
|
|
if (__glibc_likely (j0 < 52))
|
|
{
|
|
if (j0 < 0)
|
|
{
|
|
/* return 0 * sign (x) if |x| < 1 */
|
|
if (i0 >= 0)
|
|
i0 = 0;
|
|
else if ((i0 & 0x7fffffffffffffffl) != 0)
|
|
i0 = 0xbff0000000000000l;
|
|
}
|
|
else
|
|
{
|
|
uint64_t i = 0x000fffffffffffffl >> j0;
|
|
if ((i0 & i) == 0)
|
|
return x; /* x is integral */
|
|
if (i0 < 0)
|
|
i0 += 0x0010000000000000l >> j0;
|
|
i0 &= ~i;
|
|
}
|
|
INSERT_WORDS64 (x, i0);
|
|
}
|
|
else if (j0 == 0x400)
|
|
return x + x; /* inf or NaN */
|
|
return x;
|
|
#endif /* ! USE_FLOOR_BUILTIN */
|
|
}
|
|
#ifndef __floor
|
|
libm_alias_double (__floor, floor)
|
|
#endif
|