| /* |
| * 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 |
| |
| #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 |