| /* Set floating-point environment exception handling. |
| Copyright (C) 1998-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Alexandre Oliva <aoliva@redhat.com> |
| based on corresponding file in the MIPS port. |
| |
| 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 <fpu_control.h> |
| #include <shlib-compat.h> |
| |
| int |
| __fesetexceptflag (const fexcept_t *flagp, int excepts) |
| { |
| fpu_control_t cw, temp; |
| |
| /* Get the current exceptions. */ |
| _FPU_GETCW (cw); |
| |
| /* Make sure the flags we want restored are legal. */ |
| excepts &= FE_ALL_EXCEPT; |
| temp = *flagp & excepts; |
| |
| /* If EF bits are clear and the user requests them to be set, |
| we have to fail, because there's no way to do it. */ |
| if (~(cw & excepts) & temp) |
| return -1; |
| |
| /* We clear EF bits by storing a 1 in them, so flip the |
| FE_ALL_EXCEPT bits. */ |
| temp = (~temp & FE_ALL_EXCEPT); |
| |
| /* Now clear the bits called for, and copy them in from flagp. Note that |
| we ignore all non-flag bits from *flagp, so they don't matter. */ |
| cw = (cw & ~FE_ALL_EXCEPT) | temp; |
| |
| _FPU_SETFCW (cw); |
| |
| /* Success. */ |
| return 0; |
| } |
| |
| versioned_symbol (libm, __fesetexceptflag, fesetexceptflag, GLIBC_2_2); |
