projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 528be9fe | 1 | /* Raise given exceptions. |
| d4697bc9 | 2 | Copyright (C) 2000-2014 Free Software Foundation, Inc. |
| 528be9fe AJ |
3 | This file is part of the GNU C Library. |
| 4 | Contributed by Denis Joseph Barrow (djbarrow@de.ibm.com) and | |
| 5 | Martin Schwidefsky (schwidefsky@de.ibm.com). | |
| 6 | ||
| 7 | The GNU C Library is free software; you can redistribute it and/or | |
| 41bdb6e2 AJ |
8 | modify it under the terms of the GNU Lesser General Public |
| 9 | License as published by the Free Software Foundation; either | |
| 10 | version 2.1 of the License, or (at your option) any later version. | |
| 528be9fe AJ |
11 | |
| 12 | The GNU C Library is distributed in the hope that it will be useful, | |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 41bdb6e2 | 15 | Lesser General Public License for more details. |
| 528be9fe | 16 | |
| 41bdb6e2 | 17 | You should have received a copy of the GNU Lesser General Public |
| 59ba27a6 PE |
18 | License along with the GNU C Library; if not, see |
| 19 | <http://www.gnu.org/licenses/>. */ | |
| 528be9fe AJ |
20 | |
| 21 | #include <fenv_libc.h> | |
| 7e118246 | 22 | #include <float.h> |
| 528be9fe AJ |
23 | #include <math.h> |
| 24 | ||
| 25 | ||
| 26 | static __inline__ void | |
| 27 | fexceptdiv (float d, float e) | |
| 28 | { | |
| 29 | __asm__ __volatile__ ("debr %0,%1" : : "f" (d), "f" (e) ); | |
| 30 | } | |
| 31 | ||
| 32 | static __inline__ void | |
| 33 | fexceptadd (float d, float e) | |
| 34 | { | |
| 35 | __asm__ __volatile__ ("aebr %0,%1" : : "f" (d), "f" (e) ); | |
| 36 | } | |
| 37 | ||
| 38 | ||
| 39 | int | |
| 40 | feraiseexcept (int excepts) | |
| 41 | { | |
| 42 | /* Raise exceptions represented by EXPECTS. But we must raise only | |
| 43 | one signal at a time. It is important that if the overflow/underflow | |
| 44 | exception and the inexact exception are given at the same time, | |
| 45 | the overflow/underflow exception follows the inexact exception. */ | |
| 46 | ||
| 47 | /* First: invalid exception. */ | |
| 48 | if (FE_INVALID & excepts) | |
| 49 | fexceptdiv (0.0, 0.0); | |
| 50 | ||
| 51 | /* Next: division by zero. */ | |
| 52 | if (FE_DIVBYZERO & excepts) | |
| 53 | fexceptdiv (1.0, 0.0); | |
| 54 | ||
| 55 | /* Next: overflow. */ | |
| 56 | if (FE_OVERFLOW & excepts) | |
| 57 | /* I don't think we can do the same trick as intel so we will have | |
| 58 | to live with inexact coming also. */ | |
| 59 | fexceptadd (FLT_MAX, 1.0e32); | |
| 60 | ||
| 61 | /* Next: underflow. */ | |
| 62 | if (FE_UNDERFLOW & excepts) | |
| 63 | fexceptdiv (FLT_MIN, 3.0); | |
| 64 | ||
| 65 | /* Last: inexact. */ | |
| 66 | if (FE_INEXACT & excepts) | |
| 67 | fexceptdiv (2.0, 3.0); | |
| 68 | ||
| 69 | /* Success. */ | |
| 70 | return 0; | |
| 71 | } | |
| 76f2646f | 72 | libm_hidden_def (feraiseexcept) |