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- /* Install given floating-point environment and raise exceptions.
- Copyright (C) 1997,99,2000,01,07 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
- 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 <unistd.h>
- libm_hidden_proto(fesetenv)
- libm_hidden_proto(feraiseexcept)
- int
- feupdateenv (const fenv_t *envp)
- {
- fexcept_t temp;
- /* unsigned int xtemp = 0; */
- /* Save current exceptions. */
- __asm__ ("fnstsw %0" : "=m" (*&temp));
- #if 0
- /* If the CPU supports SSE we test the MXCSR as well. */
- if ((GLRO(dl_hwcap) & HWCAP_I386_XMM) != 0)
- __asm__ ("stmxcsr %0" : "=m" (*&xtemp));
- temp = (temp | xtemp) & FE_ALL_EXCEPT;
- #else
- temp &= FE_ALL_EXCEPT;
- #endif
- /* Install new environment. */
- fesetenv (envp);
- /* Raise the saved exception. Incidently for us the implementation
- defined format of the values in objects of type fexcept_t is the
- same as the ones specified using the FE_* constants. */
- feraiseexcept ((int) temp);
- /* Success. */
- return 0;
- }
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