projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| fd26970f | 1 | /* FPU control word bits. SPARC version. |
| d4697bc9 | 2 | Copyright (C) 1997-2014 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 | |
| 41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
| 8 | License as published by the Free Software Foundation; either | |
| 9 | version 2.1 of the License, or (at your option) any later version. | |
| fd26970f UD |
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 | |
| 41bdb6e2 | 14 | Lesser General Public License for more details. |
| fd26970f | 15 | |
| 41bdb6e2 | 16 | You should have received a copy of the GNU Lesser General Public |
| 59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
| 18 | <http://www.gnu.org/licenses/>. */ | |
| fd26970f UD |
19 | |
| 20 | #ifndef _FPU_CONTROL_H | |
| 21 | #define _FPU_CONTROL_H 1 | |
| 22 | ||
| 23 | ||
| 24 | #include <features.h> | |
| d265c833 | 25 | #include <bits/wordsize.h> |
| fd26970f | 26 | |
| 2c8aeff8 UD |
27 | /* masking of interrupts */ |
| 28 | #define _FPU_MASK_IM 0x08000000 | |
| 29 | #define _FPU_MASK_OM 0x04000000 | |
| 30 | #define _FPU_MASK_UM 0x02000000 | |
| 31 | #define _FPU_MASK_ZM 0x01000000 | |
| 32 | #define _FPU_MASK_PM 0x00800000 | |
| 33 | ||
| fd26970f UD |
34 | /* precision control */ |
| 35 | #define _FPU_EXTENDED 0x00000000 /* RECOMMENDED */ | |
| 36 | #define _FPU_DOUBLE 0x20000000 | |
| 37 | #define _FPU_80BIT 0x30000000 | |
| 38 | #define _FPU_SINGLE 0x10000000 /* DO NOT USE */ | |
| 39 | ||
| 40 | /* rounding control / Sparc */ | |
| 63551311 UD |
41 | #define _FPU_RC_DOWN 0xc0000000 |
| 42 | #define _FPU_RC_UP 0x80000000 | |
| fd26970f | 43 | #define _FPU_RC_ZERO 0x40000000 |
| 63551311 | 44 | #define _FPU_RC_NEAREST 0x0 /* RECOMMENDED */ |
| fd26970f | 45 | |
| 63551311 | 46 | #define _FPU_RESERVED 0x30300000 /* Reserved bits in cw */ |
| fd26970f UD |
47 | |
| 48 | ||
| 49 | /* Now two recommended cw */ | |
| 50 | ||
| f41c8091 | 51 | /* Linux and IEEE default: |
| fd26970f UD |
52 | - extended precision |
| 53 | - rounding to nearest | |
| d265c833 | 54 | - no exceptions */ |
| f41c8091 | 55 | #define _FPU_DEFAULT 0x0 |
| fd26970f UD |
56 | #define _FPU_IEEE 0x0 |
| 57 | ||
| fd26970f | 58 | /* Type of the control word. */ |
| d265c833 UD |
59 | typedef unsigned long int fpu_control_t; |
| 60 | ||
| 61 | #if __WORDSIZE == 64 | |
| 842b81d6 DM |
62 | # define _FPU_GETCW(cw) __asm__ __volatile__ ("stx %%fsr,%0" : "=m" (*&cw)) |
| 63 | # define _FPU_SETCW(cw) __asm__ __volatile__ ("ldx %0,%%fsr" : : "m" (*&cw)) | |
| d265c833 | 64 | #else |
| 842b81d6 DM |
65 | # define _FPU_GETCW(cw) __asm__ __volatile__ ("st %%fsr,%0" : "=m" (*&cw)) |
| 66 | # define _FPU_SETCW(cw) __asm__ __volatile__ ("ld %0,%%fsr" : : "m" (*&cw)) | |
| d265c833 | 67 | #endif |
| fd26970f UD |
68 | |
| 69 | /* Default control word set at startup. */ | |
| 70 | extern fpu_control_t __fpu_control; | |
| 71 | ||
| fd26970f | 72 | #endif /* fpu_control.h */ |