1 /*- 2 * Copyright (c) 1997, 1999, 2002 The NetBSD Foundation, Inc. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to The NetBSD Foundation 6 * by Charles M. Hannum, Neil A. Carson, and Jason R. Thorpe. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #ifndef _ARM_BYTE_SWAP_H_ 31 #define _ARM_BYTE_SWAP_H_ 32 33 #ifdef __GNUC__ 34 #include <sys/types.h> 35 __BEGIN_DECLS 36 37 #define __BYTE_SWAP_U32_VARIABLE __byte_swap_u32_variable 38 static __inline uint32_t 39 __byte_swap_u32_variable(uint32_t v) 40 { 41 uint32_t t1; 42 43 t1 = v ^ ((v << 16) | (v >> 16)); 44 t1 &= 0xff00ffffU; 45 v = (v >> 8) | (v << 24); 46 v ^= (t1 >> 8); 47 return (v); 48 } 49 50 #define __BYTE_SWAP_U16_VARIABLE __byte_swap_u16_variable 51 static __inline uint16_t 52 __byte_swap_u16_variable(uint16_t v) 53 { 54 55 v &= 0xffff; 56 v = (v >> 8) | (v << 8); 57 return (v); 58 } 59 60 __END_DECLS 61 #endif 62 63 #endif /* _ARM_BYTE_SWAP_H_ */ 64
