| /* 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 */ |