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/* |
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* PearPC |
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* sysendian.h |
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* |
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* Copyright (C) 1999-2004 Stefan Weyergraf |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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|
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#ifndef __SYSTEM_ARCH_SPECIFIC_SYSENDIAN_H__ |
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#define __SYSTEM_ARCH_SPECIFIC_SYSENDIAN_H__ |
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|
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#include "system/types.h" |
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#include "config.h" |
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|
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static inline FUNCTION_CONST uint32 ppc_bswap_word(uint32 data) |
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{ |
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return (data>>24)|((data>>8)&0xff00)|((data<<8)&0xff0000)|(data<<24); |
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} |
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|
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static inline FUNCTION_CONST uint64 ppc_bswap_dword(uint64 data) |
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{ |
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return (((uint64)ppc_bswap_word(data)) << 32) | (uint64)ppc_bswap_word(data >> 32); |
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} |
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|
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static inline FUNCTION_CONST uint16 ppc_bswap_half(uint16 data) |
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{ |
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return (data<<8)|(data>>8); |
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} |
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|
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#if HOST_ENDIANESS == HOST_ENDIANESS_LE |
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|
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/* |
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* Little-endian machine |
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*/ |
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|
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# define ppc_dword_from_BE(data) (ppc_bswap_dword(data)) |
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# define ppc_word_from_BE(data) (ppc_bswap_word(data)) |
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# define ppc_half_from_BE(data) (ppc_bswap_half(data)) |
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|
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# define ppc_dword_from_LE(data) ((uint64)(data)) |
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# define ppc_word_from_LE(data) ((uint32)(data)) |
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# define ppc_half_from_LE(data) ((uint16)(data)) |
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|
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# define ppc_dword_to_LE(data) ppc_dword_from_LE(data) |
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# define ppc_word_to_LE(data) ppc_word_from_LE(data) |
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# define ppc_half_to_LE(data) ppc_half_from_LE(data) |
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|
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# define ppc_dword_to_BE(data) ppc_dword_from_BE(data) |
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# define ppc_word_to_BE(data) ppc_word_from_BE(data) |
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# define ppc_half_to_BE(data) ppc_half_from_BE(data) |
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|
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#elif HOST_ENDIANESS == HOST_ENDIANESS_BE |
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|
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/* |
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* Big-endian machine |
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*/ |
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# define ppc_dword_from_BE(data) ((uint64)(data)) |
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# define ppc_word_from_BE(data) ((uint32)(data)) |
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# define ppc_half_from_BE(data) ((uint16)(data)) |
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|
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# define ppc_dword_from_LE(data) (ppc_bswap_dword(data)) |
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# define ppc_word_from_LE(data) (ppc_bswap_word(data)) |
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# define ppc_half_from_LE(data) (ppc_bswap_half(data)) |
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|
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# define ppc_dword_to_LE(data) ppc_dword_from_LE(data) |
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# define ppc_word_to_LE(data) ppc_word_from_LE(data) |
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# define ppc_half_to_LE(data) ppc_half_from_LE(data) |
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|
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# define ppc_dword_to_BE(data) ppc_dword_from_BE(data) |
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# define ppc_word_to_BE(data) ppc_word_from_BE(data) |
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# define ppc_half_to_BE(data) ppc_half_from_BE(data) |
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|
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#else |
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|
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/* |
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* Weird-endian machine |
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* HOST_ENDIANESS is neither little- nor big-endian? |
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*/ |
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# error "What kind of a weird machine do you have? It's neither little- nor big-endian??? This is unsupported." |
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|
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#endif |
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|
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#endif |
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