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Add femode_t functions: alpha.

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This patch adds Alpha versions of fegetmode and fesetmode.  Untested.

	* sysdeps/alpha/fpu/fegetmode.c: New file.
	* sysdeps/alpha/fpu/fesetmode.c: Likewise.
This commit is contained in:
Joseph Myers 2016-09-07 16:42:19 +00:00
parent 1396c647a9
commit 297c592e2e
3 changed files with 80 additions and 0 deletions
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2016-09-07 Joseph Myers <joseph@codesourcery.com>
* sysdeps/alpha/fpu/fegetmode.c: New file.
* sysdeps/alpha/fpu/fesetmode.c: Likewise.
* sysdeps/aarch64/fpu/fegetmode.c: New file.
* sysdeps/aarch64/fpu/fesetmode.c: Likewise.

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sysdeps/alpha/fpu/fegetmode.c Normal file
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/* Store current floating-point control modes. Alpha version.
Copyright (C) 2016 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_libc.h>
int
fegetmode (femode_t *modep)
{
unsigned long int fpcr;
unsigned long int swcr;
/* As in fegetenv. */
swcr = __ieee_get_fp_control ();
__asm__ __volatile__ ("mf_fpcr %0" : "=f" (fpcr));
*modep = ((fpcr & FPCR_ROUND_MASK) | (swcr & SWCR_ALL_MASK));
return 0;
}

44
sysdeps/alpha/fpu/fesetmode.c Normal file
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/* Install given floating-point control modes. Alpha version.
Copyright (C) 2016 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_libc.h>
int
fesetmode (const femode_t *modep)
{
unsigned long int fpcr;
unsigned long int swcr;
femode_t mode;
/* As in fesetenv. */
if ((long int) modep >= 0)
mode = *modep;
else
mode = (unsigned long int) modep;
__asm__ __volatile__ ("excb; mf_fpcr %0" : "=f" (fpcr));
fpcr = (fpcr & ~FPCR_ROUND_MASK) | (mode & FPCR_ROUND_MASK);
__asm__ __volatile__ ("mt_fpcr %0" : : "f" (fpcr));
swcr = __ieee_get_fp_control ();
swcr = ((mode & SWCR_ALL_MASK & ~SWCR_STATUS_MASK)
| (swcr & SWCR_STATUS_MASK));
__ieee_set_fp_control (swcr);
return 0;
}