| /* Raise given exceptions. |
| Copyright (C) 1997-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> |
| |
| 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 <float.h> |
| #include <math.h> |
| |
| int |
| __feraiseexcept (int excepts) |
| { |
| /* Raise exceptions represented by EXCEPTS. But we must raise only one |
| signal at a time. It is important that if the overflow/underflow |
| exception and the divide by zero exception are given at the same |
| time, the overflow/underflow exception follows the divide by zero |
| exception. */ |
| |
| /* First: invalid exception. */ |
| if (excepts & FE_INVALID) |
| { |
| /* One example of an invalid operation is 0 * Infinity. */ |
| double d = HUGE_VAL; |
| __asm__ __volatile__ ("fmul%.s %#0r0,%0; fnop" : "=f" (d) : "0" (d)); |
| } |
| |
| /* Next: division by zero. */ |
| if (excepts & FE_DIVBYZERO) |
| { |
| double d = 1.0; |
| __asm__ __volatile__ ("fdiv%.s %#0r0,%0; fnop" : "=f" (d) : "0" (d)); |
| } |
| |
| /* Next: overflow. */ |
| if (excepts & FE_OVERFLOW) |
| { |
| long double d = LDBL_MAX; |
| |
| __asm__ __volatile__ ("fmul%.x %0,%0; fnop" : "=f" (d) : "0" (d)); |
| } |
| |
| /* Next: underflow. */ |
| if (excepts & FE_UNDERFLOW) |
| { |
| long double d = -LDBL_MAX; |
| |
| __asm__ __volatile__ ("fetox%.x %0; fnop" : "=f" (d) : "0" (d)); |
| } |
| |
| /* Last: inexact. */ |
| if (excepts & FE_INEXACT) |
| { |
| long double d = 1.0; |
| __asm__ __volatile__ ("fdiv%.s %#0r3,%0; fnop" : "=f" (d) : "0" (d)); |
| } |
| |
| /* Success. */ |
| return 0; |
| } |
| |
| #include <shlib-compat.h> |
| #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); |