40 lines
970 B
C
40 lines
970 B
C
#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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(__builtin_constant_p(x) ? \
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__bswap_constant_16(x) : \
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__swap16(x))
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#define __bswap_32(x) \
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(__builtin_constant_p(x) ? \
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__bswap_constant_32(x) : \
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__swap32(x))
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#endif /* ETHERBOOT_BITS_BYTESWAP_H */
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