| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Raise given exceptions. |
| 2 | Copyright (C) 1997,99,2000,01,02,04 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, write to the Free |
| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 18 | 02111-1307 USA. */ |
| 19 | |
| 20 | #include "fpu/fenv_libc.h" |
| 21 | |
| 22 | int |
| 23 | __FERAISEEXCEPT_INTERNAL (int excepts) |
| 24 | { |
| 25 | unsigned long f; |
| 26 | |
| 27 | f = fegetenv_register (); |
| 28 | f |= (excepts & FE_ALL_EXCEPT); |
| 29 | fesetenv_register (f); |
| 30 | |
| 31 | /* Force the operations that cause the exceptions. */ |
| 32 | if ((FE_INVALID & excepts) != 0) |
| 33 | { |
| 34 | /* ?? Does not set sticky bit ?? */ |
| 35 | /* 0 / 0 */ |
| 36 | __asm__ __volatile__ ("efsdiv %0,%0,%1" : : "r" (0), "r" (0)); |
| 37 | } |
| 38 | |
| 39 | if ((FE_DIVBYZERO & excepts) != 0) |
| 40 | { |
| 41 | /* 1.0 / 0.0 */ |
| 42 | __asm__ __volatile__ ("efsdiv %0,%0,%1" : : "r" (1.0F), "r" (0)); |
| 43 | } |
| 44 | |
| 45 | if ((FE_OVERFLOW & excepts) != 0) |
| 46 | { |
| 47 | /* ?? Does not set sticky bit ?? */ |
| 48 | /* Largest normalized number plus itself. */ |
| 49 | __asm__ __volatile__ ("efsadd %0,%0,%1" : : "r" (0x7f7fffff), "r" (0x7f7fffff)); |
| 50 | } |
| 51 | |
| 52 | if ((FE_UNDERFLOW & excepts) != 0) |
| 53 | { |
| 54 | /* ?? Does not set sticky bit ?? */ |
| 55 | /* Smallest normalized number times itself. */ |
| 56 | __asm__ __volatile__ ("efsmul %0,%0,%1" : : "r" (0x800000), "r" (0x800000)); |
| 57 | } |
| 58 | |
| 59 | if ((FE_INEXACT & excepts) != 0) |
| 60 | { |
| 61 | /* Smallest normalized minus 1.0 raises the inexact flag. */ |
| 62 | __asm__ __volatile__ ("efssub %0,%0,%1" : : "r" (0x00800000), "r" (1.0F)); |
| 63 | } |
| 64 | |
| 65 | /* Success. */ |
| 66 | return 0; |
| 67 | } |