Annotation of sys/arch/amd64/include/endian.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: endian.h,v 1.3 2005/12/13 00:35:22 millert Exp $ */
! 2:
! 3: /*-
! 4: * Copyright (c) 1997 Niklas Hallqvist. All rights reserved.
! 5: *
! 6: * Redistribution and use in source and binary forms, with or without
! 7: * modification, are permitted provided that the following conditions
! 8: * are met:
! 9: * 1. Redistributions of source code must retain the above copyright
! 10: * notice, this list of conditions and the following disclaimer.
! 11: * 2. Redistributions in binary form must reproduce the above copyright
! 12: * notice, this list of conditions and the following disclaimer in the
! 13: * documentation and/or other materials provided with the distribution.
! 14: *
! 15: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
! 16: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 17: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 18: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
! 19: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
! 20: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
! 21: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
! 22: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 23: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
! 24: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 25: */
! 26:
! 27: #ifndef _I386_ENDIAN_H_
! 28: #define _I386_ENDIAN_H_
! 29:
! 30: #ifdef __GNUC__
! 31:
! 32: #define __swap32md(x) ({ \
! 33: u_int32_t __swap32md_x = (x); \
! 34: \
! 35: __asm ("bswap %1" : "+r" (__swap32md_x)); \
! 36: __swap32md_x; \
! 37: })
! 38:
! 39: /* XXX - I'm sure there is a better way on this cpu. */
! 40: #define __swap64md(x) ({ \
! 41: u_int64_t __swap64md_x = (x); \
! 42: \
! 43: (u_int64_t)__swap32md(__swap64md_x >> 32) | \
! 44: (u_int64_t)__swap32md(__swap64md_x & 0xffffffff) << 32; \
! 45: })
! 46:
! 47: #define __swap16md(x) ({ \
! 48: u_int16_t __swap16md_x = (x); \
! 49: \
! 50: __asm ("rorw $8, %w1" : "+r" (__swap16md_x)); \
! 51: __swap16md_x; \
! 52: })
! 53:
! 54: /* Tell sys/endian.h we have MD variants of the swap macros. */
! 55: #define MD_SWAP
! 56:
! 57: #endif /* __GNUC__ */
! 58:
! 59: #define _BYTE_ORDER _LITTLE_ENDIAN
! 60: #include <sys/endian.h>
! 61:
! 62: #endif /* _I386_ENDIAN_H_ */
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