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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, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
- #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__ ("stx %%fsr,%0" : "=m" (*&cw))
- # define _FPU_SETCW(cw) __asm__ ("ldx %0,%%fsr" : : "m" (*&cw))
- #else
- # define _FPU_GETCW(cw) __asm__ ("st %%fsr,%0" : "=m" (*&cw))
- # define _FPU_SETCW(cw) __asm__ ("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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