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3846ef75 | 1 | /* FPU control word definitions. SH version. |
dff8da6b | 2 | Copyright (C) 1999-2024 Free Software Foundation, Inc. |
3846ef75 UD |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
3846ef75 UD |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
41bdb6e2 AJ |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. | |
3846ef75 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
3846ef75 UD |
18 | |
19 | #ifndef _FPU_CONTROL_H | |
20 | #define _FPU_CONTROL_H | |
21 | ||
7007c661 KK |
22 | #if !defined(__SH_FPU_ANY__) |
23 | ||
24 | #define _FPU_RESERVED 0xffffffff | |
25 | #define _FPU_DEFAULT 0x00000000 | |
26 | typedef unsigned int fpu_control_t; | |
27 | #define _FPU_GETCW(cw) (cw) = 0 | |
28 | #define _FPU_SETCW(cw) (void) (cw) | |
29 | extern fpu_control_t __fpu_control; | |
30 | ||
31 | #else | |
32 | ||
cf7a1eb8 NI |
33 | #include <features.h> |
34 | ||
3846ef75 UD |
35 | /* masking of interrupts */ |
36 | #define _FPU_MASK_VM 0x0800 /* Invalid operation */ | |
37 | #define _FPU_MASK_ZM 0x0400 /* Division by zero */ | |
38 | #define _FPU_MASK_OM 0x0200 /* Overflow */ | |
39 | #define _FPU_MASK_UM 0x0100 /* Underflow */ | |
40 | #define _FPU_MASK_IM 0x0080 /* Inexact operation */ | |
41 | ||
42 | /* rounding control */ | |
43 | #define _FPU_RC_NEAREST 0x0 /* RECOMMENDED */ | |
44 | #define _FPU_RC_ZERO 0x1 | |
45 | ||
46 | #define _FPU_RESERVED 0xffc00000 /* These bits are reserved. */ | |
47 | ||
48 | /* The fdlibm code requires strict IEEE double precision arithmetic, | |
49 | and no interrupts for exceptions, rounding to nearest. */ | |
50 | #define _FPU_DEFAULT 0x00080000 /* Default value. */ | |
51 | #define _FPU_IEEE 0x00080f80 /* Default + exceptions enabled. */ | |
52 | ||
53 | /* Type of the control word. */ | |
54 | typedef unsigned int fpu_control_t; | |
55 | ||
56 | /* Macros for accessing the hardware control word. */ | |
57 | #define _FPU_GETCW(cw) __asm__ ("sts fpscr,%0" : "=r" (cw)) | |
58 | ||
59 | #if defined __GNUC__ | |
cf7a1eb8 NI |
60 | __BEGIN_DECLS |
61 | ||
ca1ccae5 MF |
62 | /* GCC provides this function. */ |
63 | extern void __set_fpscr (unsigned long); | |
3846ef75 UD |
64 | #define _FPU_SETCW(cw) __set_fpscr ((cw)) |
65 | #else | |
66 | #define _FPU_SETCW(cw) __asm__ ("lds %0,fpscr" : : "r" (cw)) | |
67 | #endif | |
68 | ||
69 | /* Default control word set at startup. */ | |
70 | extern fpu_control_t __fpu_control; | |
71 | ||
cf7a1eb8 | 72 | __END_DECLS |
7007c661 KK |
73 | |
74 | #endif /* __SH_FPU_ANY__ */ | |
75 | ||
3846ef75 | 76 | #endif /* _FPU_CONTROL_H */ |