| 1 |
/* |
| 2 |
* PearPC |
| 3 |
* sysendian.h |
| 4 |
* |
| 5 |
* Copyright (C) 1999-2004 Stefan Weyergraf |
| 6 |
* |
| 7 |
* This program is free software; you can redistribute it and/or modify |
| 8 |
* it under the terms of the GNU General Public License version 2 as |
| 9 |
* published by the Free Software Foundation. |
| 10 |
* |
| 11 |
* This program 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 |
| 14 |
* GNU General Public License for more details. |
| 15 |
* |
| 16 |
* You should have received a copy of the GNU General Public License |
| 17 |
* along with this program; if not, write to the Free Software |
| 18 |
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 19 |
*/ |
| 20 |
|
| 21 |
#ifndef __SYSTEM_ARCH_SPECIFIC_SYSENDIAN_H__ |
| 22 |
#define __SYSTEM_ARCH_SPECIFIC_SYSENDIAN_H__ |
| 23 |
|
| 24 |
#include "system/types.h" |
| 25 |
|
| 26 |
static inline FUNCTION_CONST uint32 ppc_bswap_word(uint32 data) |
| 27 |
{ |
| 28 |
asm ( |
| 29 |
"bswap %0": "=r" (data) : "0" (data) |
| 30 |
); |
| 31 |
return data; |
| 32 |
} |
| 33 |
|
| 34 |
static inline FUNCTION_CONST uint16 ppc_bswap_half(uint16 data) |
| 35 |
{ |
| 36 |
asm ( |
| 37 |
"xchgb %b0,%h0": "=q" (data): "0" (data) |
| 38 |
); |
| 39 |
return data; |
| 40 |
} |
| 41 |
|
| 42 |
static inline FUNCTION_CONST uint64 ppc_bswap_dword(uint64 data) |
| 43 |
{ |
| 44 |
return (((uint64)ppc_bswap_word(data)) << 32) | (uint64)ppc_bswap_word(data >> 32); |
| 45 |
} |
| 46 |
|
| 47 |
# define ppc_dword_from_BE(data) (ppc_bswap_dword(data)) |
| 48 |
# define ppc_word_from_BE(data) (ppc_bswap_word(data)) |
| 49 |
# define ppc_half_from_BE(data) (ppc_bswap_half(data)) |
| 50 |
|
| 51 |
# define ppc_dword_from_LE(data) ((uint64)(data)) |
| 52 |
# define ppc_word_from_LE(data) ((uint32)(data)) |
| 53 |
# define ppc_half_from_LE(data) ((uint16)(data)) |
| 54 |
|
| 55 |
# define ppc_dword_to_LE(data) ppc_dword_from_LE(data) |
| 56 |
# define ppc_word_to_LE(data) ppc_word_from_LE(data) |
| 57 |
# define ppc_half_to_LE(data) ppc_half_from_LE(data) |
| 58 |
|
| 59 |
# define ppc_dword_to_BE(data) ppc_dword_from_BE(data) |
| 60 |
# define ppc_word_to_BE(data) ppc_word_from_BE(data) |
| 61 |
# define ppc_half_to_BE(data) ppc_half_from_BE(data) |
| 62 |
|
| 63 |
#endif |
Parent Directory
| 
Revision Log