mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-10 07:10:06 +00:00
0b9af583a5
The i386 and x86_64 versions of fesetenv, when called with FE_DFL_ENV or FE_NOMASK_ENV as argument, do not clear SSE exceptions raised in MXCSR. These arguments should, like other fenv_t values, represent the whole of the floating-point state, so such exceptions should be cleared; this patch adds the required clearing. (Discovered while working on bug 16068.) Tested for x86_64 and x86. [BZ #19181] * sysdeps/i386/fpu/fesetenv.c (__fesetenv): Clear already-raised SSE exceptions when argument is FE_DFL_ENV or FE_NOMASK_ENV. * sysdeps/x86_64/fpu/fesetenv.c (__fesetenv): Likewise. * math/test-fenv-clear-main.c: New file. * math/test-fenv-clear.c: Likewise. * math/Makefile (tests): Add test-fenv-clear. * sysdeps/x86/fpu/test-fenv-clear-sse.c: New file. * sysdeps/x86/fpu/Makefile [$(subdir) = math] (tests): Add test-fenv-clear-sse. [$(subdir) = math] (CFLAGS-test-fenv-clear-sse.c): New variable.
92 lines
2.4 KiB
C
92 lines
2.4 KiB
C
/* Test fesetenv (FE_DFL_ENV) and fesetenv (FE_NOMASK_ENV) clear
|
|
exceptions (bug 19181).
|
|
Copyright (C) 2015 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 <fenv.h>
|
|
#include <float.h>
|
|
#include <stdio.h>
|
|
|
|
volatile float fa = 1.0f, fb = 0.0f, fc = FLT_MAX, fr;
|
|
volatile long double lda = 1.0L, ldb = 0.0L, ldc = LDBL_MAX, ldr;
|
|
|
|
static void
|
|
raise_exceptions (void)
|
|
{
|
|
/* Raise exceptions both with feraiseexcept and arithmetic to allow
|
|
for case of multiple floating-point units with separate
|
|
exceptions state. */
|
|
feraiseexcept (FE_ALL_EXCEPT);
|
|
fr = fb / fb;
|
|
fr = fa / fb;
|
|
fr = fc * fc;
|
|
fr = fa / fc / fc;
|
|
ldr = ldb / ldb;
|
|
ldr = lda / ldb;
|
|
ldr = ldc * ldc;
|
|
ldr = lda / ldc / ldc;
|
|
}
|
|
|
|
static __attribute__ ((noinline)) int
|
|
run_tests (void)
|
|
{
|
|
int result = 0;
|
|
raise_exceptions ();
|
|
if (fesetenv (FE_DFL_ENV) == 0)
|
|
{
|
|
puts ("PASS: fesetenv (FE_DFL_ENV)");
|
|
if (fetestexcept (FE_ALL_EXCEPT) == 0)
|
|
puts ("PASS: fesetenv (FE_DFL_ENV) clearing exceptions");
|
|
else
|
|
{
|
|
puts ("FAIL: fesetenv (FE_DFL_ENV) clearing exceptions");
|
|
result = 1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
puts ("FAIL: fesetenv (FE_DFL_ENV)");
|
|
result = 1;
|
|
}
|
|
#ifdef FE_NOMASK_ENV
|
|
raise_exceptions ();
|
|
if (fesetenv (FE_NOMASK_ENV) == 0)
|
|
{
|
|
if (fetestexcept (FE_ALL_EXCEPT) == 0)
|
|
puts ("PASS: fesetenv (FE_NOMASK_ENV) clearing exceptions");
|
|
else
|
|
{
|
|
puts ("FAIL: fesetenv (FE_NOMASK_ENV) clearing exceptions");
|
|
result = 1;
|
|
}
|
|
}
|
|
else
|
|
puts ("fesetenv (FE_NOMASK_ENV) failed, cannot test");
|
|
#endif
|
|
return result;
|
|
}
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
CHECK_CAN_TEST;
|
|
return run_tests ();
|
|
}
|
|
|
|
#define TEST_FUNCTION do_test ()
|
|
#include "../test-skeleton.c"
|