mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-27 07:20:11 +00:00
73 lines
2.3 KiB
C
73 lines
2.3 KiB
C
/* FPU control word bits. SPARC version.
|
|
Copyright (C) 1997-2013 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Miguel de Icaza
|
|
|
|
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/>. */
|
|
|
|
#ifndef _FPU_CONTROL_H
|
|
#define _FPU_CONTROL_H 1
|
|
|
|
|
|
#include <features.h>
|
|
#include <bits/wordsize.h>
|
|
|
|
/* masking of interrupts */
|
|
#define _FPU_MASK_IM 0x08000000
|
|
#define _FPU_MASK_OM 0x04000000
|
|
#define _FPU_MASK_UM 0x02000000
|
|
#define _FPU_MASK_ZM 0x01000000
|
|
#define _FPU_MASK_PM 0x00800000
|
|
|
|
/* precision control */
|
|
#define _FPU_EXTENDED 0x00000000 /* RECOMMENDED */
|
|
#define _FPU_DOUBLE 0x20000000
|
|
#define _FPU_80BIT 0x30000000
|
|
#define _FPU_SINGLE 0x10000000 /* DO NOT USE */
|
|
|
|
/* rounding control / Sparc */
|
|
#define _FPU_RC_DOWN 0xc0000000
|
|
#define _FPU_RC_UP 0x80000000
|
|
#define _FPU_RC_ZERO 0x40000000
|
|
#define _FPU_RC_NEAREST 0x0 /* RECOMMENDED */
|
|
|
|
#define _FPU_RESERVED 0x30300000 /* Reserved bits in cw */
|
|
|
|
|
|
/* Now two recommended cw */
|
|
|
|
/* Linux and IEEE default:
|
|
- extended precision
|
|
- rounding to nearest
|
|
- no exceptions */
|
|
#define _FPU_DEFAULT 0x0
|
|
#define _FPU_IEEE 0x0
|
|
|
|
/* Type of the control word. */
|
|
typedef unsigned long int fpu_control_t;
|
|
|
|
#if __WORDSIZE == 64
|
|
# define _FPU_GETCW(cw) __asm__ __volatile__ ("stx %%fsr,%0" : "=m" (*&cw))
|
|
# define _FPU_SETCW(cw) __asm__ __volatile__ ("ldx %0,%%fsr" : : "m" (*&cw))
|
|
#else
|
|
# define _FPU_GETCW(cw) __asm__ __volatile__ ("st %%fsr,%0" : "=m" (*&cw))
|
|
# define _FPU_SETCW(cw) __asm__ __volatile__ ("ld %0,%%fsr" : : "m" (*&cw))
|
|
#endif
|
|
|
|
/* Default control word set at startup. */
|
|
extern fpu_control_t __fpu_control;
|
|
|
|
#endif /* fpu_control.h */
|