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Linux/HPPA specific feholdexcept implementation.

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This commit is contained in:
Ulrich Drepper 2000-10-15 03:34:49 +00:00
parent 0ea85d5c2f
commit 1f8d3bd8e7
1 changed files with 60 additions and 0 deletions
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sysdeps/hppa/fpu/feholdexcpt.c Normal file
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/* Store current floating-point environment and clear exceptions.
Copyright (C) 2000 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by David Huggins-Daines <dhd@debian.org>, 2000
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <fenv.h>
#include <string.h>
int
feholdexcept (fenv_t *envp)
{
fenv_t clear;
/* Store the environment. */
{
fenv_t * _regs = envp;
__asm__ (
"fstd %%fr0,0(%2)\n"
"fstd,ma %%fr1,8(%2)\n"
"fstd,ma %%fr2,8(%2)\n"
"fstd %%fr3,0(%2)\n"
: "=m" (*_regs), "=r" (_regs) : "1" (_regs));
memcpy (&clear, envp, sizeof (clear));
}
/* Now clear all exceptions. */
clear.__status_word &= ~(FE_ALL_EXCEPT << 27);
memset (clear.__exception, 0, sizeof (clear.__exception));
/* And set all exceptions to non-stop. */
clear.__status_word &= ~FE_ALL_EXCEPT;
/* Load the new environment. */
{
fenv_t * _regs = &clear + 1;
__asm__ (
"fldd,mb -8(%2),%%fr3\n"
"fldd,mb -8(%2),%%fr2\n"
"fldd,mb -8(%2),%%fr1\n"
"fldd -8(%2),%%fr0\n"
: "=m" (*_regs), "=r" (_regs) : "1" (_regs));
}
return 0;
}