100 lines
3.2 KiB
C
100 lines
3.2 KiB
C
/*
|
|
* Copyright (c) 2008 Travis Geiselbrecht
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining
|
|
* a copy of this software and associated documentation files
|
|
* (the "Software"), to deal in the Software without restriction,
|
|
* including without limitation the rights to use, copy, modify, merge,
|
|
* publish, distribute, sublicense, and/or sell copies of the Software,
|
|
* and to permit persons to whom the Software is furnished to do so,
|
|
* subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be
|
|
* included in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
|
|
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
|
|
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
|
|
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
|
|
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
#ifndef __ENDIAN_H
|
|
#define __ENDIAN_H
|
|
|
|
#include <sys/types.h>
|
|
|
|
#ifndef LITTLE_ENDIAN
|
|
#define LITTLE_ENDIAN 1234
|
|
#endif
|
|
#ifndef BIG_ENDIAN
|
|
#define BIG_ENDIAN 4321
|
|
#endif
|
|
|
|
#if __POWERPC__
|
|
#include <ppc_intrinsics.h>
|
|
#endif
|
|
|
|
#if defined(ARCH_ARM)
|
|
#define BYTE_ORDER LITTLE_ENDIAN
|
|
#endif
|
|
|
|
#if defined(__i386__) || defined(_X86_)
|
|
#define BYTE_ORDER LITTLE_ENDIAN
|
|
#endif
|
|
|
|
#ifndef BYTE_ORDER
|
|
#error "need to get the BYTE_ORDER define from somewhere"
|
|
#endif
|
|
|
|
// define a macro that unconditionally swaps
|
|
#define SWAP_32(x) \
|
|
(((uint32_t)(x) << 24) | (((uint32_t)(x) & 0xff00) << 8) |(((uint32_t)(x) & 0x00ff0000) >> 8) | ((uint32_t)(x) >> 24))
|
|
#define SWAP_16(x) \
|
|
((((uint16_t)(x) & 0xff) << 8) | ((uint16_t)(x) >> 8))
|
|
|
|
// standard swap macros
|
|
#if BYTE_ORDER == BIG_ENDIAN
|
|
#define LE32(val) SWAP_32(val)
|
|
#define LE16(val) SWAP_16(val)
|
|
#define BE32(val) (val)
|
|
#define BE16(val) (val)
|
|
#else
|
|
#define LE32(val) (val)
|
|
#define LE16(val) (val)
|
|
#define BE32(val) SWAP_32(val)
|
|
#define BE16(val) SWAP_16(val)
|
|
#endif
|
|
|
|
#define LE32SWAP(var) (var) = LE32(var);
|
|
#define LE16SWAP(var) (var) = LE16(var);
|
|
#define BE32SWAP(var) (var) = BE32(var);
|
|
#define BE16SWAP(var) (var) = BE16(var);
|
|
|
|
/* classic network byte swap stuff */
|
|
#define ntohs(n) BE16(n)
|
|
#define htons(h) BE16(h)
|
|
#define ntohl(n) BE32(n)
|
|
#define htonl(h) BE32(h)
|
|
|
|
// some memory access macros
|
|
#if __POWERPC__
|
|
#define READ_MEM_WORD(ptr) __lwbrx((word *)(ptr), 0)
|
|
#define READ_MEM_HALFWORD(ptr) __lhbrx((halfword *)(ptr), 0)
|
|
#define READ_MEM_BYTE(ptr) (*(byte *)(ptr))
|
|
#define WRITE_MEM_WORD(ptr, data) __stwbrx(data, (word *)(ptr), 0)
|
|
#define WRITE_MEM_HALFWORD(ptr, data) __sthbrx(data, (halfword *)(ptr), 0)
|
|
#define WRITE_MEM_BYTE(ptr, data) (*(byte *)(ptr) = (data))
|
|
#else
|
|
#define READ_MEM_WORD(ptr) SWAPIT_32(*(word *)(ptr))
|
|
#define READ_MEM_HALFWORD(ptr) SWAPIT_16(*(halfword *)(ptr))
|
|
#define READ_MEM_BYTE(ptr) (*(byte *)(ptr))
|
|
#define WRITE_MEM_WORD(ptr, data) (*(word *)(ptr) = SWAPIT_32(data))
|
|
#define WRITE_MEM_HALFWORD(ptr, data) (*(halfword *)(ptr) = SWAPIT_16(data))
|
|
#define WRITE_MEM_BYTE(ptr, data) (*(byte *)(ptr) = (data))
|
|
#endif
|
|
|
|
|
|
#endif
|