diff options
Diffstat (limited to 'sysdeps/x86_64/fpu/fraiseexcpt.c')
| -rw-r--r-- | sysdeps/x86_64/fpu/fraiseexcpt.c | 121 |
1 files changed, 0 insertions, 121 deletions
diff --git a/sysdeps/x86_64/fpu/fraiseexcpt.c b/sysdeps/x86_64/fpu/fraiseexcpt.c deleted file mode 100644 index 13eb4af331..0000000000 --- a/sysdeps/x86_64/fpu/fraiseexcpt.c +++ /dev/null @@ -1,121 +0,0 @@ -/* Raise given exceptions. - Copyright (C) 2001-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - 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 <math.h> - -int -__feraiseexcept (int excepts) -{ - /* Raise exceptions represented by EXPECTS. But we must raise only - one signal at a time. It is important that if the overflow/underflow - exception and the inexact exception are given at the same time, - the overflow/underflow exception follows the inexact exception. */ - - /* First: invalid exception. */ - if ((FE_INVALID & excepts) != 0) - { - /* One example of an invalid operation is 0.0 / 0.0. */ - float f = 0.0; - - __asm__ __volatile__ ("divss %0, %0 " : : "x" (f)); - (void) &f; - } - - /* Next: division by zero. */ - if ((FE_DIVBYZERO & excepts) != 0) - { - float f = 1.0; - float g = 0.0; - - __asm__ __volatile__ ("divss %1, %0" : : "x" (f), "x" (g)); - (void) &f; - } - - /* Next: overflow. */ - if ((FE_OVERFLOW & excepts) != 0) - { - /* XXX: Is it ok to only set the x87 FPU? */ - /* There is no way to raise only the overflow flag. Do it the - hard way. */ - fenv_t temp; - - /* Bah, we have to clear selected exceptions. Since there is no - `fldsw' instruction we have to do it the hard way. */ - __asm__ __volatile__ ("fnstenv %0" : "=m" (*&temp)); - - /* Set the relevant bits. */ - temp.__status_word |= FE_OVERFLOW; - - /* Put the new data in effect. */ - __asm__ __volatile__ ("fldenv %0" : : "m" (*&temp)); - - /* And raise the exception. */ - __asm__ __volatile__ ("fwait"); - } - - /* Next: underflow. */ - if ((FE_UNDERFLOW & excepts) != 0) - { - /* XXX: Is it ok to only set the x87 FPU? */ - /* There is no way to raise only the underflow flag. Do it the - hard way. */ - fenv_t temp; - - /* Bah, we have to clear selected exceptions. Since there is no - `fldsw' instruction we have to do it the hard way. */ - __asm__ __volatile__ ("fnstenv %0" : "=m" (*&temp)); - - /* Set the relevant bits. */ - temp.__status_word |= FE_UNDERFLOW; - - /* Put the new data in effect. */ - __asm__ __volatile__ ("fldenv %0" : : "m" (*&temp)); - - /* And raise the exception. */ - __asm__ __volatile__ ("fwait"); - } - - /* Last: inexact. */ - if ((FE_INEXACT & excepts) != 0) - { - /* XXX: Is it ok to only set the x87 FPU? */ - /* There is no way to raise only the inexact flag. Do it the - hard way. */ - fenv_t temp; - - /* Bah, we have to clear selected exceptions. Since there is no - `fldsw' instruction we have to do it the hard way. */ - __asm__ __volatile__ ("fnstenv %0" : "=m" (*&temp)); - - /* Set the relevant bits. */ - temp.__status_word |= FE_INEXACT; - - /* Put the new data in effect. */ - __asm__ __volatile__ ("fldenv %0" : : "m" (*&temp)); - - /* And raise the exception. */ - __asm__ __volatile__ ("fwait"); - } - - /* Success. */ - return 0; -} -libm_hidden_def (__feraiseexcept) -weak_alias (__feraiseexcept, feraiseexcept) -libm_hidden_weak (feraiseexcept) |