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553cb3ed46
sys/param.h was manually adjusted to not define __NetBSD_Version__ since it will be defined by the compiler.
112 lines
No EOL
3.1 KiB
C
Vendored
112 lines
No EOL
3.1 KiB
C
Vendored
/* $NetBSD: byte_swap.h,v 1.4 2017/01/17 11:09:36 rin Exp $ */
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/*-
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* Copyright (c) 2014 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Matt Thomas of 3am Software Foundry.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _ARM_BYTE_SWAP_H_
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#define _ARM_BYTE_SWAP_H_
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#ifdef __aarch64__
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#ifdef _LOCORE
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#define BSWAP16(_src, _dst) \
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rev16 _dst, _src
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#define BSWAP32(_src, _dst) \
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rev _dst, _src
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#define BSWAP64(_src, _dst) \
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rev _dst, _src
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#else
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#ifdef __GNUC__
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#include <sys/types.h>
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__BEGIN_DECLS
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#define __BYTE_SWAP_U64_VARIABLE __byte_swap_u64_variable
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static __inline uint64_t
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__byte_swap_u64_variable(uint64_t v)
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{
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if (!__builtin_constant_p(v)) {
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__asm("rev\t%x0, %x1" : "=r" (v) : "0" (v));
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return v;
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}
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v = ((v & 0x000000ff) << (56 - 0)) | ((v >> (56 - 0)) & 0x000000ff)
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| ((v & 0x0000ff00) << (48 - 8)) | ((v >> (48 - 8)) & 0x0000ff00)
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| ((v & 0x00ff0000) << (40 - 16)) | ((v >> (40 - 16)) & 0x00ff0000)
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| ((v & 0xff000000) << (32 - 24)) | ((v >> (32 - 24)) & 0xff000000);
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return v;
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}
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#define __BYTE_SWAP_U32_VARIABLE __byte_swap_u32_variable
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static __inline uint32_t
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__byte_swap_u32_variable(uint32_t v)
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{
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if (!__builtin_constant_p(v)) {
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__asm("rev\t%w0, %w1" : "=r" (v) : "0" (v));
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return v;
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}
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v = ((v & 0x00ff) << (24 - 0)) | ((v >> (24 - 0)) & 0x00ff)
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| ((v & 0xff00) << (16 - 8)) | ((v >> (16 - 8)) & 0xff00);
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return v;
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}
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#define __BYTE_SWAP_U16_VARIABLE __byte_swap_u16_variable
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static __inline uint16_t
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__byte_swap_u16_variable(uint16_t v)
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{
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if (!__builtin_constant_p(v)) {
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uint32_t v32 = v;
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__asm("rev16\t%w0, %w1" : "=r" (v32) : "0" (v32));
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return (uint16_t)v32;
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}
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v &= 0xffff;
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v = (uint16_t)((v >> 8) | (v << 8));
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return v;
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}
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__END_DECLS
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#endif
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#endif /* _LOCORE */
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#elif defined(__arm__)
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#include <arm/asm.h>
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#endif
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#endif /* _ARM_BYTE_SWAP_H_ */ |