mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 13:00:06 +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
80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
/* Copyright (C) 2011-2021 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@gmail.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/>. */
|
|
|
|
#include <errno.h>
|
|
#include <math.h>
|
|
#include <math_private.h>
|
|
#include <math-svid-compat.h>
|
|
|
|
|
|
#if LIBM_SVID_COMPAT
|
|
static float
|
|
__attribute__ ((noinline))
|
|
sysv_scalbf (float x, float fn)
|
|
{
|
|
float z = __ieee754_scalbf (x, fn);
|
|
|
|
if (__glibc_unlikely (isinf (z)))
|
|
{
|
|
if (isfinite (x))
|
|
return __kernel_standard_f (x, fn, 132); /* scalb overflow */
|
|
else
|
|
__set_errno (ERANGE);
|
|
}
|
|
else if (__builtin_expect (z == 0.0f, 0) && z != x)
|
|
return __kernel_standard_f (x, fn, 133); /* scalb underflow */
|
|
|
|
return z;
|
|
}
|
|
|
|
|
|
/* Wrapper scalbf */
|
|
float
|
|
__scalbf (float x, float fn)
|
|
{
|
|
if (__glibc_unlikely (_LIB_VERSION == _SVID_))
|
|
return sysv_scalbf (x, fn);
|
|
else
|
|
{
|
|
float z = __ieee754_scalbf (x, fn);
|
|
|
|
if (__glibc_unlikely (!isfinite (z) || z == 0.0f))
|
|
{
|
|
if (isnan (z))
|
|
{
|
|
if (!isnan (x) && !isnan (fn))
|
|
__set_errno (EDOM);
|
|
}
|
|
else if (isinf (z))
|
|
{
|
|
if (!isinf (x) && !isinf (fn))
|
|
__set_errno (ERANGE);
|
|
}
|
|
else
|
|
{
|
|
/* z == 0. */
|
|
if (x != 0.0f && !isinf (fn))
|
|
__set_errno (ERANGE);
|
|
}
|
|
}
|
|
return z;
|
|
}
|
|
}
|
|
weak_alias (__scalbf, scalbf)
|
|
#endif
|