mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-04 02:40:06 +00:00
581c785bf3
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 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
83 lines
2.5 KiB
C
83 lines
2.5 KiB
C
/* Raise given exceptions.
|
|
Copyright (C) 1997-2022 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <fenv.h>
|
|
#include <float.h>
|
|
#include <math.h>
|
|
|
|
int
|
|
__feraiseexcept (int excepts)
|
|
{
|
|
/* Raise exceptions represented by EXCEPTS. But we must raise only one
|
|
signal at a time. It is important that if the overflow/underflow
|
|
exception and the divide by zero exception are given at the same
|
|
time, the overflow/underflow exception follows the divide by zero
|
|
exception. */
|
|
|
|
/* First: invalid exception. */
|
|
if (excepts & FE_INVALID)
|
|
{
|
|
/* One example of an invalid operation is 0 * Infinity. */
|
|
double d = HUGE_VAL;
|
|
__asm__ __volatile__ ("fmul%.s %#0r0,%0; fnop" : "=f" (d) : "0" (d));
|
|
}
|
|
|
|
/* Next: division by zero. */
|
|
if (excepts & FE_DIVBYZERO)
|
|
{
|
|
double d = 1.0;
|
|
__asm__ __volatile__ ("fdiv%.s %#0r0,%0; fnop" : "=f" (d) : "0" (d));
|
|
}
|
|
|
|
/* Next: overflow. */
|
|
if (excepts & FE_OVERFLOW)
|
|
{
|
|
long double d = LDBL_MAX;
|
|
|
|
__asm__ __volatile__ ("fmul%.x %0,%0; fnop" : "=f" (d) : "0" (d));
|
|
}
|
|
|
|
/* Next: underflow. */
|
|
if (excepts & FE_UNDERFLOW)
|
|
{
|
|
long double d = -LDBL_MAX;
|
|
|
|
__asm__ __volatile__ ("fetox%.x %0; fnop" : "=f" (d) : "0" (d));
|
|
}
|
|
|
|
/* Last: inexact. */
|
|
if (excepts & FE_INEXACT)
|
|
{
|
|
long double d = 1.0;
|
|
__asm__ __volatile__ ("fdiv%.s %#0r3,%0; fnop" : "=f" (d) : "0" (d));
|
|
}
|
|
|
|
/* Success. */
|
|
return 0;
|
|
}
|
|
|
|
#include <shlib-compat.h>
|
|
#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
|
|
strong_alias (__feraiseexcept, __old_feraiseexcept)
|
|
compat_symbol (libm, __old_feraiseexcept, feraiseexcept, GLIBC_2_1);
|
|
#endif
|
|
|
|
libm_hidden_def (__feraiseexcept)
|
|
libm_hidden_ver (__feraiseexcept, feraiseexcept)
|
|
versioned_symbol (libm, __feraiseexcept, feraiseexcept, GLIBC_2_2);
|