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/* FPU control word bits. SPARC version.
Copyright (C) 1997, 1998, 1999 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 */
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