projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| d115c0d8 | 1 | /* Raise given exceptions. |
| d4697bc9 | 2 | Copyright (C) 2000-2014 Free Software Foundation, Inc. |
| d115c0d8 AO |
3 | This file is part of the GNU C Library. |
| 4 | Contributed by Alexandre Oliva <aoliva@redhat.com> | |
| 5 | based on corresponding file in the M68K port. | |
| 6 | ||
| 7 | The GNU C Library is free software; you can redistribute it and/or | |
| 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. | |
| 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 | |
| 15 | Lesser General Public License for more details. | |
| 16 | ||
| 17 | You should have received a copy of the GNU Lesser General Public | |
| ab84e3ff PE |
18 | License along with the GNU C Library. If not, see |
| 19 | <http://www.gnu.org/licenses/>. */ | |
| d115c0d8 AO |
20 | |
| 21 | #include <fenv.h> | |
| 22 | #include <float.h> | |
| 23 | #include <math.h> | |
| 24 | #include <shlib-compat.h> | |
| 25 | ||
| 26 | int | |
| 27 | __feraiseexcept (int excepts) | |
| 28 | { | |
| 29 | /* Raise exceptions represented by EXCEPTS. But we must raise only one | |
| 30 | signal at a time. It is important that if the overflow/underflow | |
| 31 | exception and the divide by zero exception are given at the same | |
| 32 | time, the overflow/underflow exception follows the divide by zero | |
| 33 | exception. */ | |
| 34 | ||
| 35 | /* First: invalid exception. */ | |
| 36 | if (excepts & FE_INVALID) | |
| 37 | { | |
| c0c3f78a | 38 | /* One example of an invalid operation is 0 * Infinity. */ |
| d115c0d8 AO |
39 | float x = HUGE_VALF, y = 0.0f; |
| 40 | __asm__ __volatile__ ("fmul %1,%0" : "+f" (x) : "f" (y)); | |
| 41 | } | |
| 42 | ||
| 43 | /* Next: division by zero. */ | |
| 44 | if (excepts & FE_DIVBYZERO) | |
| 45 | { | |
| 46 | float x = 1.0f, y = 0.0f; | |
| 47 | __asm__ __volatile__ ("fdiv %1,%0" : "+f" (x) : "f" (y)); | |
| 48 | } | |
| 49 | ||
| 50 | /* Next: overflow. */ | |
| 51 | if (excepts & FE_OVERFLOW) | |
| 52 | { | |
| 53 | float x = FLT_MAX; | |
| 54 | ||
| 55 | __asm__ __volatile__ ("fmul %0,%0" : "+f" (x)); | |
| 56 | } | |
| 57 | ||
| 58 | /* Next: underflow. */ | |
| 59 | if (excepts & FE_UNDERFLOW) | |
| 60 | { | |
| 61 | float x = -FLT_MIN; | |
| 62 | ||
| 63 | __asm__ __volatile__ ("fmul %0,%0" : "+f" (x)); | |
| 64 | } | |
| 65 | ||
| 66 | /* Last: inexact. */ | |
| 67 | if (excepts & FE_INEXACT) | |
| 68 | { | |
| 69 | float x = 1.0f, y = 3.0f; | |
| 70 | __asm__ __volatile__ ("fdiv %1,%0" : "=f" (x) : "f" (y)); | |
| 71 | } | |
| 72 | ||
| 73 | /* Success. */ | |
| 74 | return 0; | |
| 75 | } | |
| 76 | ||
| 77 | libm_hidden_ver (__feraiseexcept, feraiseexcept) | |
| 78 | versioned_symbol (libm, __feraiseexcept, feraiseexcept, GLIBC_2_2); |