projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 3846ef75 | 1 | /* Raise given exceptions. |
| b168057a | 2 | Copyright (C) 1997-2015 Free Software Foundation, Inc. |
| 3846ef75 | 3 | This file is part of the GNU C Library. |
| 8a53f50f | 4 | Contributed by Nobuhiro Iwamatsu <iwamatsu@nigauri.org>, 2012. |
| 3846ef75 UD |
5 | |
| 6 | The GNU C Library is free software; you can redistribute it and/or | |
| 41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
| 8 | License as published by the Free Software Foundation; either | |
| 9 | version 2.1 of the License, or (at your option) any later version. | |
| 3846ef75 UD |
10 | |
| 11 | The GNU C Library is distributed in the hope that it will be useful, | |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 41bdb6e2 | 14 | Lesser General Public License for more details. |
| 3846ef75 | 15 | |
| 41bdb6e2 | 16 | You should have received a copy of the GNU Lesser General Public |
| 59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
| 18 | <http://www.gnu.org/licenses/>. */ | |
| 3846ef75 UD |
19 | |
| 20 | #include <fenv.h> | |
| 8a53f50f | 21 | #include <float.h> |
| 3846ef75 UD |
22 | #include <fpu_control.h> |
| 23 | #include <math.h> | |
| 24 | ||
| 25 | int | |
| 0747f818 | 26 | __feraiseexcept (int excepts) |
| 3846ef75 | 27 | { |
| 8a53f50f KK |
28 | if (excepts == 0) |
| 29 | return 0; | |
| 30 | ||
| 3846ef75 | 31 | /* Raise exceptions represented by EXPECTS. */ |
| 8a53f50f KK |
32 | |
| 33 | if (excepts & FE_INEXACT) | |
| 34 | { | |
| 35 | double d = 1.0, x = 3.0; | |
| 36 | __asm__ __volatile__ ("fdiv %1, %0" : "+d" (d) : "d" (x)); | |
| 37 | } | |
| 38 | ||
| 39 | if (excepts & FE_UNDERFLOW) | |
| 40 | { | |
| 41 | long double d = LDBL_MIN, x = 10; | |
| 42 | __asm__ __volatile__ ("fdiv %1, %0" : "+d" (d) : "d" (x)); | |
| 43 | } | |
| 44 | ||
| 45 | if (excepts & FE_OVERFLOW) | |
| 46 | { | |
| 47 | long double d = LDBL_MAX; | |
| 48 | __asm__ __volatile__ ("fmul %0, %0" : "+d" (d) : "d" (d)); | |
| 49 | } | |
| 50 | ||
| 51 | if (excepts & FE_DIVBYZERO) | |
| 52 | { | |
| 53 | double d = 1.0, x = 0.0; | |
| 54 | __asm__ __volatile__ ("fdiv %1, %0" : "+d" (d) : "d" (x)); | |
| 55 | } | |
| 56 | ||
| 57 | if (excepts & FE_INVALID) | |
| 58 | { | |
| 59 | double d = HUGE_VAL, x = 0.0; | |
| 60 | __asm__ __volatile__ ("fmul %1, %0" : "+d" (d) : "d" (x)); | |
| 61 | } | |
| 3846ef75 | 62 | |
| 3f99608f KK |
63 | { |
| 64 | /* Restore flag fields. */ | |
| 65 | fpu_control_t cw; | |
| 66 | _FPU_GETCW (cw); | |
| 67 | cw |= (excepts & FE_ALL_EXCEPT); | |
| 68 | _FPU_SETCW (cw); | |
| 69 | } | |
| 70 | ||
| 3846ef75 UD |
71 | return 0; |
| 72 | } | |
| 0747f818 JM |
73 | libm_hidden_def (__feraiseexcept) |
| 74 | weak_alias (__feraiseexcept, feraiseexcept) | |
| 75 | libm_hidden_weak (feraiseexcept) |