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76a2110b47
Introduce <machine/_endian.h> to let target based customization of <machine/endian.h> via * _LITTLE_ENDIAN, * _BIG_ENDIAN, * _PDP_ENDIAN, and * _BYTE_ORDER. defines. Add definitions expected by FreeBSD to <machine/endian.h> like * _QUAD_HIGHWORD, * _QUAD_LOWWORD, * __bswap16(), * __bswap32(), * __bswap64(), * __htonl(), * __htons(), * __ntohl(), and * __ntohs(). Also, if __BSD_VISIBLE * LITTLE_ENDIAN, * BIG_ENDIAN, * PDP_ENDIAN, and * BYTE_ORDER. Targets that define __machine_host_to_from_network_defined in <machine/_endian.h> must provide their own implementation of * __htonl(), * __htons(), * __ntohl(), and * __ntohs(), otherwise a default implementation is provided by <machine/endian.h>. In case of GCC defines to builtins are used. Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
46 lines
1013 B
C
46 lines
1013 B
C
/* machine/_endian.h
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Copyright 2005, 2010, 2011 Red Hat, Inc.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#ifndef __MACHINE_ENDIAN_H__
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#error "must be included via <machine/endian.h>"
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#endif /* !__MACHINE_ENDIAN_H__ */
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#include <_ansi.h>
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#include <bits/endian.h>
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#define _LITTLE_ENDIAN __LITTLE_ENDIAN
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#define _BIG_ENDIAN __BIG_ENDIAN
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#define _PDP_ENDIAN __PDP_ENDIAN
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#define _BYTE_ORDER __BYTE_ORDER
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#define __machine_host_to_from_network_defined
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_ELIDABLE_INLINE __uint32_t __ntohl(__uint32_t);
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_ELIDABLE_INLINE __uint16_t __ntohs(__uint16_t);
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_ELIDABLE_INLINE __uint32_t
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__ntohl(__uint32_t _x)
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{
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__asm__("bswap %0" : "=r" (_x) : "0" (_x));
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return _x;
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}
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_ELIDABLE_INLINE __uint16_t
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__ntohs(__uint16_t _x)
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{
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__asm__("xchgb %b0,%h0" /* swap bytes */
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: "=Q" (_x)
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: "0" (_x));
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return _x;
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}
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#define __htonl(_x) __ntohl(_x)
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#define __htons(_x) __ntohs(_x)
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