51369649b0
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
143 lines
4.2 KiB
C
143 lines
4.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2001 David E. O'Brien
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)endian.h 8.1 (Berkeley) 6/10/93
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* $NetBSD: endian.h,v 1.7 1999/08/21 05:53:51 simonb Exp $
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* $FreeBSD$
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*/
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#ifndef _ENDIAN_H_
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#define _ENDIAN_H_
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#include <sys/_types.h>
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/*
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* Definitions for byte order, according to byte significance from low
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* address to high.
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*/
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#define _LITTLE_ENDIAN 1234 /* LSB first: i386, vax */
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#define _BIG_ENDIAN 4321 /* MSB first: 68000, ibm, net */
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#define _PDP_ENDIAN 3412 /* LSB first in word, MSW first in long */
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#ifdef __ARMEB__
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#define _BYTE_ORDER _BIG_ENDIAN
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#else
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#define _BYTE_ORDER _LITTLE_ENDIAN
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#endif /* __ARMEB__ */
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#if __BSD_VISIBLE
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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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#endif
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#ifdef __ARMEB__
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#define _QUAD_HIGHWORD 0
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#define _QUAD_LOWWORD 1
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#define __ntohl(x) ((__uint32_t)(x))
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#define __ntohs(x) ((__uint16_t)(x))
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#define __htonl(x) ((__uint32_t)(x))
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#define __htons(x) ((__uint16_t)(x))
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#else
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#define _QUAD_HIGHWORD 1
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#define _QUAD_LOWWORD 0
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#define __ntohl(x) (__bswap32(x))
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#define __ntohs(x) (__bswap16(x))
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#define __htonl(x) (__bswap32(x))
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#define __htons(x) (__bswap16(x))
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#endif /* __ARMEB__ */
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static __inline __uint64_t
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__bswap64(__uint64_t _x)
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{
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return ((_x >> 56) | ((_x >> 40) & 0xff00) | ((_x >> 24) & 0xff0000) |
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((_x >> 8) & 0xff000000) | ((_x << 8) & ((__uint64_t)0xff << 32)) |
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((_x << 24) & ((__uint64_t)0xff << 40)) |
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((_x << 40) & ((__uint64_t)0xff << 48)) | ((_x << 56)));
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}
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static __inline __uint32_t
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__bswap32_var(__uint32_t v)
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{
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__uint32_t t1;
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__asm __volatile("eor %1, %0, %0, ror #16\n"
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"bic %1, %1, #0x00ff0000\n"
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"mov %0, %0, ror #8\n"
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"eor %0, %0, %1, lsr #8\n"
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: "+r" (v), "=r" (t1));
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return (v);
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}
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static __inline __uint16_t
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__bswap16_var(__uint16_t v)
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{
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__uint32_t ret = v & 0xffff;
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__asm __volatile(
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"mov %0, %0, ror #8\n"
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"orr %0, %0, %0, lsr #16\n"
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"bic %0, %0, %0, lsl #16"
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: "+r" (ret));
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return ((__uint16_t)ret);
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}
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#ifdef __OPTIMIZE__
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#define __bswap32_constant(x) \
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((((x) & 0xff000000U) >> 24) | \
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(((x) & 0x00ff0000U) >> 8) | \
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(((x) & 0x0000ff00U) << 8) | \
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(((x) & 0x000000ffU) << 24))
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#define __bswap16_constant(x) \
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((((x) & 0xff00) >> 8) | \
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(((x) & 0x00ff) << 8))
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#define __bswap16(x) \
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((__uint16_t)(__builtin_constant_p(x) ? \
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__bswap16_constant(x) : \
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__bswap16_var(x)))
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#define __bswap32(x) \
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((__uint32_t)(__builtin_constant_p(x) ? \
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__bswap32_constant(x) : \
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__bswap32_var(x)))
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#else
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#define __bswap16(x) __bswap16_var(x)
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#define __bswap32(x) __bswap32_var(x)
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#endif /* __OPTIMIZE__ */
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#endif /* !_ENDIAN_H_ */
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