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847b055c | 1 | /* FPU control word definitions. Stub version. |
b168057a | 2 | Copyright (C) 2000-2015 Free Software Foundation, Inc. |
528be9fe | 3 | Contributed by Denis Joseph Barrow (djbarrow@de.ibm.com) and |
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4 | Martin Schwidefsky (schwidefsky@de.ibm.com). |
5 | This file is part of the GNU C Library. | |
41bdb6e2 | 6 | |
847b055c | 7 | The GNU C Library is free software; you can redistribute it and/or |
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8 | modify it under the terms of the GNU Lesser General Public |
9 | License as published by the Free Software Foundation; either | |
10 | version 2.1 of the License, or (at your option) any later version. | |
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11 | |
12 | The GNU C Library is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 15 | Lesser General Public License for more details. |
847b055c | 16 | |
41bdb6e2 | 17 | You should have received a copy of the GNU Lesser General Public |
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18 | License along with the GNU C Library; if not, see |
19 | <http://www.gnu.org/licenses/>. */ | |
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20 | |
21 | #ifndef _FPU_CONTROL_H | |
22 | # define _FPU_CONTROL_H | |
23 | ||
24 | # include <features.h> | |
25 | ||
26 | /* These bits are reserved are not changed. */ | |
27 | # define _FPU_RESERVED 0x070700FC | |
28 | ||
29 | /* The fdlibm code requires no interrupts for exceptions. Don't | |
30 | change the rounding mode, it would break long double I/O! */ | |
31 | #define _FPU_DEFAULT 0x00000000 /* Default value. */ | |
32 | ||
33 | /* Type of the control word. */ | |
34 | typedef unsigned int fpu_control_t; | |
35 | ||
36 | /* Macros for accessing the hardware control word. */ | |
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37 | #define _FPU_GETCW(cw) __asm__ volatile ("efpc %0,0" : "=d" (cw)) |
38 | #define _FPU_SETCW(cw) __asm__ volatile ("sfpc %0,0" : : "d" (cw)) | |
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39 | |
40 | /* Default control word set at startup. */ | |
41 | extern fpu_control_t __fpu_control; | |
42 | ||
43 | #endif /* _FPU_CONTROL_H */ |