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52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
/* Install given floating-point environment and raise exceptions.
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Copyright (C) 1997-2014 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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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_private.h>
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#include <arm-features.h>
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int
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feupdateenv (const fenv_t *envp)
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{
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fenv_t fenv;
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/* Fail if a VFP unit isn't present. */
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if (!ARM_HAVE_VFP)
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return 1;
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if ((envp == FE_DFL_ENV) || (envp == FE_NOMASK_ENV))
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{
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fpu_control_t fpscr;
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_FPU_GETCW (fpscr);
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/* Preserve the reserved FPSCR flags. */
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fpscr &= _FPU_RESERVED;
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fpscr |= (envp == FE_DFL_ENV) ? _FPU_DEFAULT : _FPU_IEEE;
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/* Create a valid fenv to pass to libc_feupdateenv_vfp. */
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fenv.__cw = fpscr;
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envp = &fenv;
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}
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libc_feupdateenv_vfp (envp);
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return 0;
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}
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libm_hidden_def (feupdateenv)
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