1 /* Install given floating-point environment and raise exceptions.
2 Copyright (C) 1997,99,2000,01,07 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
23 libm_hidden_proto(fesetenv)
24 libm_hidden_proto(feraiseexcept)
27 feupdateenv (const fenv_t *envp)
30 /* unsigned int xtemp = 0; */
32 /* Save current exceptions. */
33 __asm__ ("fnstsw %0" : "=m" (*&temp));
36 /* If the CPU supports SSE we test the MXCSR as well. */
37 if ((GLRO(dl_hwcap) & HWCAP_I386_XMM) != 0)
38 __asm__ ("stmxcsr %0" : "=m" (*&xtemp));
40 temp = (temp | xtemp) & FE_ALL_EXCEPT;
42 temp &= FE_ALL_EXCEPT;
45 /* Install new environment. */
48 /* Raise the saved exception. Incidently for us the implementation
49 defined format of the values in objects of type fexcept_t is the
50 same as the ones specified using the FE_* constants. */
51 feraiseexcept ((int) temp);