projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| fd26970f | 1 | /* FPU control word bits. SPARC version. |
| cb0509a8 | 2 | Copyright (C) 1997, 1998 Free Software Foundation, Inc. |
| fd26970f UD |
3 | This file is part of the GNU C Library. |
| 4 | Contributed by Miguel de Icaza | |
| 5 | ||
| 6 | The GNU C Library is free software; you can redistribute it and/or | |
| 7 | modify it under the terms of the GNU Library General Public License as | |
| 8 | published by the Free Software Foundation; either version 2 of the | |
| 9 | License, or (at your option) any later version. | |
| 10 | ||
| 11 | The GNU C Library is distributed in the hope that it will be useful, | |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 | Library General Public License for more details. | |
| 15 | ||
| 16 | You should have received a copy of the GNU Library General Public | |
| 17 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
| 18 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 19 | Boston, MA 02111-1307, USA. */ | |
| 20 | ||
| 21 | #ifndef _FPU_CONTROL_H | |
| 22 | #define _FPU_CONTROL_H 1 | |
| 23 | ||
| 24 | ||
| 25 | #include <features.h> | |
| 26 | ||
| 27 | /* precision control */ | |
| 28 | #define _FPU_EXTENDED 0x00000000 /* RECOMMENDED */ | |
| 29 | #define _FPU_DOUBLE 0x20000000 | |
| 30 | #define _FPU_80BIT 0x30000000 | |
| 31 | #define _FPU_SINGLE 0x10000000 /* DO NOT USE */ | |
| 32 | ||
| 33 | /* rounding control / Sparc */ | |
| 63551311 UD |
34 | #define _FPU_RC_DOWN 0xc0000000 |
| 35 | #define _FPU_RC_UP 0x80000000 | |
| fd26970f | 36 | #define _FPU_RC_ZERO 0x40000000 |
| 63551311 | 37 | #define _FPU_RC_NEAREST 0x0 /* RECOMMENDED */ |
| fd26970f | 38 | |
| 63551311 | 39 | #define _FPU_RESERVED 0x30300000 /* Reserved bits in cw */ |
| fd26970f UD |
40 | |
| 41 | ||
| 42 | /* Now two recommended cw */ | |
| 43 | ||
| f41c8091 | 44 | /* Linux and IEEE default: |
| fd26970f UD |
45 | - extended precision |
| 46 | - rounding to nearest | |
| f41c8091 UD |
47 | - no exceptions. */ |
| 48 | #define _FPU_DEFAULT 0x0 | |
| fd26970f UD |
49 | #define _FPU_IEEE 0x0 |
| 50 | ||
| fd26970f | 51 | /* Type of the control word. */ |
| 63551311 | 52 | typedef unsigned int fpu_control_t; |
| fd26970f UD |
53 | |
| 54 | #define _FPU_GETCW(cw) __asm__ ("st %%fsr,%0" : "=m" (*&cw)) | |
| 63551311 | 55 | #define _FPU_SETCW(cw) __asm__ ("ld %0,%%fsr" : : "m" (*&cw)) |
| fd26970f UD |
56 | |
| 57 | /* Default control word set at startup. */ | |
| 58 | extern fpu_control_t __fpu_control; | |
| 59 | ||
| fd26970f | 60 | #endif /* fpu_control.h */ |