| /* Raise given exceptions. |
| Copyright (C) 1997, 1999, 2000, 2002, 2007 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| 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 <float.h> |
| #include <math.h> |
| #include <shlib-compat.h> |
| |
| int |
| __feraiseexcept (int excepts) |
| { |
| static const struct { |
| double zero, one, max, min, pi; |
| } c = { |
| 0.0, 1.0, DBL_MAX, DBL_MIN, M_PI |
| }; |
| double d; |
| |
| /* Raise exceptions represented by EXPECTS. But we must raise only |
| one signal at a time. It is important the if the overflow/underflow |
| exception and the inexact exception are given at the same time, |
| the overflow/underflow exception follows the inexact exception. */ |
| |
| /* First: invalid exception. */ |
| if ((FE_INVALID & excepts) != 0) |
| { |
| /* One example of a invalid operation is 0/0. */ |
| __asm ("" : "=e" (d) : "0" (c.zero)); |
| d /= c.zero; |
| __asm __volatile ("" : : "e" (d)); |
| } |
| |
| /* Next: division by zero. */ |
| if ((FE_DIVBYZERO & excepts) != 0) |
| { |
| __asm ("" : "=e" (d) : "0" (c.one)); |
| d /= c.zero; |
| __asm __volatile ("" : : "e" (d)); |
| } |
| |
| /* Next: overflow. */ |
| if ((FE_OVERFLOW & excepts) != 0) |
| { |
| __asm ("" : "=e" (d) : "0" (c.max)); |
| d *= d; |
| __asm __volatile ("" : : "e" (d)); |
| } |
| |
| /* Next: underflow. */ |
| if ((FE_UNDERFLOW & excepts) != 0) |
| { |
| __asm ("" : "=e" (d) : "0" (c.min)); |
| d *= d; |
| __asm __volatile ("" : : "e" (d)); |
| } |
| |
| /* Last: inexact. */ |
| if ((FE_INEXACT & excepts) != 0) |
| { |
| __asm ("" : "=e" (d) : "0" (c.one)); |
| d /= c.pi; |
| __asm __volatile ("" : : "e" (d)); |
| } |
| |
| /* Success. */ |
| return 0; |
| } |
| |
| #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2) |
| strong_alias (__feraiseexcept, __old_feraiseexcept) |
| compat_symbol (libm, __old_feraiseexcept, feraiseexcept, GLIBC_2_1); |
| #endif |
| |
| libm_hidden_ver (__feraiseexcept, feraiseexcept) |
| versioned_symbol (libm, __feraiseexcept, feraiseexcept, GLIBC_2_2); |