/* 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, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #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; }