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47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
/* Install given floating-point environment and raise exceptions for
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atomic compound assignment. e500 version.
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Copyright (C) 2004-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<http://www.gnu.org/licenses/>. */
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#include <fenv_libc.h>
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#include <stdlib.h>
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#include <sysdep.h>
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#include <sys/prctl.h>
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void
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__atomic_feupdateenv (const fenv_t *envp)
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{
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int exc;
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fenv_union_t u;
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INTERNAL_SYSCALL_DECL (err);
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int r;
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/* Save the currently set exceptions. */
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exc = fegetenv_register () & SPEFSCR_ALL_EXCEPT;
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u.fenv = *envp;
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fesetenv_register (u.l[1]);
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r = INTERNAL_SYSCALL (prctl, err, 2, PR_SET_FPEXC,
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u.l[0] | PR_FP_EXC_SW_ENABLE);
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if (INTERNAL_SYSCALL_ERROR_P (r, err))
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abort ();
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/* Raise (if appropriate) saved exceptions. */
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__feraiseexcept_soft (exc);
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}
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