48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
/*
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* Copyright (C) 2004 Tobias Lorenz
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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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#ifndef ETHERBOOT_BITS_BYTESWAP_H
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#define ETHERBOOT_BITS_BYTESWAP_H
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/* We do not have byte swap functions ... We are
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* RISC processor ...
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*/
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static inline unsigned short __swap16(volatile unsigned short v)
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{
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return ((v << 8) | (v >> 8));
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}
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static inline unsigned int __swap32(volatile unsigned long v)
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{
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return ((v << 24) | ((v & 0xff00) << 8) | ((v & 0xff0000) >> 8) | (v >> 24));
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}
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#define __bswap_constant_16(x) \
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((uint16_t)((((uint16_t)(x) & 0x00ff) << 8) | \
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(((uint16_t)(x) & 0xff00) >> 8)))
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#define __bswap_constant_32(x) \
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((uint32_t)((((uint32_t)(x) & 0x000000ffU) << 24) | \
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(((uint32_t)(x) & 0x0000ff00U) << 8) | \
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(((uint32_t)(x) & 0x00ff0000U) >> 8) | \
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(((uint32_t)(x) & 0xff000000U) >> 24)))
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# define __bswap_16(x) \
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(__extension__ \
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({ unsigned short int __bsx = (x); \
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((((__bsx) >> 8) & 0xff) | (((__bsx) & 0xff) << 8)); }))
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# define __bswap_32(x) \
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(__extension__ \
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({ unsigned int __bsx = (x); \
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((((__bsx) & 0xff000000) >> 24) | (((__bsx) & 0x00ff0000) >> 8) | \
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(((__bsx) & 0x0000ff00) << 8) | (((__bsx) & 0x000000ff) << 24)); }))
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#endif /* ETHERBOOT_BITS_BYTESWAP_H */
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