| The Android Open Source Project | 1dc9e47 | 2009-03-03 19:28:35 -0800 | [diff] [blame] | 1 | /* $OpenBSD: endian.h,v 1.3 2005/12/13 00:35:23 millert Exp $ */ |
| 2 | |
| Jim Huang | aa35095 | 2010-08-31 14:51:44 +0800 | [diff] [blame^] | 3 | /* |
| 4 | * Copyright (C) 2010 The Android Open Source Project |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * * Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * * Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in |
| 14 | * the documentation and/or other materials provided with the |
| 15 | * distribution. |
| 16 | * |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 18 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 19 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 20 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 21 | * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 23 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| 24 | * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| 25 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| 26 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| 27 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 28 | * SUCH DAMAGE. |
| 29 | */ |
| 30 | |
| 31 | #ifndef _ARM_ENDIAN_H_ |
| 32 | #define _ARM_ENDIAN_H_ |
| 33 | |
| 34 | #ifdef __GNUC__ |
| 35 | |
| 36 | /* NOTE: header <machine/cpu-features.h> could not be included directly |
| 37 | * since it defines extra macros, such as PLD. |
| 38 | */ |
| 39 | #if defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7R__) || \ |
| 40 | defined(__ARM_ARCH_7__) || \ |
| 41 | defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || \ |
| 42 | defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) || \ |
| 43 | defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__) |
| 44 | |
| 45 | /* According to RealView Assembler User's Guide, REV and REV16 are available |
| 46 | * in Thumb code and 16-bit instructions when used in Thumb-2 code. |
| 47 | * |
| 48 | * REV Rd, Rm |
| 49 | * Rd and Rm must both be Lo registers. |
| 50 | * |
| 51 | * REV16 Rd, Rm |
| 52 | * Rd and Rm must both be Lo registers. |
| 53 | */ |
| 54 | #ifdef __thumb__ |
| 55 | #define REV_LO_REG asm("r4") |
| 56 | #else |
| 57 | #define REV_LO_REG |
| 58 | #endif |
| 59 | |
| 60 | #define __swap16md(x) ({ \ |
| 61 | register u_int16_t _x REV_LO_REG = (x); \ |
| 62 | __asm volatile ("rev16 %0, %0" : "+r" (_x)); \ |
| 63 | _x; \ |
| 64 | }) |
| 65 | |
| 66 | #define __swap32md(x) ({ \ |
| 67 | register u_int32_t _x REV_LO_REG = (x); \ |
| 68 | __asm volatile ("rev %0, %0" : "+r" (_x)); \ |
| 69 | _x; \ |
| 70 | }) |
| 71 | |
| 72 | #define __swap64md(x) ({ \ |
| 73 | u_int64_t _x = (x); \ |
| 74 | (u_int64_t) __swap32md(_x >> 32) | \ |
| 75 | (u_int64_t) __swap32md(_x & 0xffffffff) << 32; \ |
| 76 | }) |
| 77 | |
| 78 | /* Tell sys/endian.h we have MD variants of the swap macros. */ |
| 79 | #define MD_SWAP |
| 80 | |
| 81 | #endif /* __ARM_ARCH__ */ |
| 82 | #endif /* __GNUC__ */ |
| 83 | |
| The Android Open Source Project | 1dc9e47 | 2009-03-03 19:28:35 -0800 | [diff] [blame] | 84 | #ifdef __ARMEB__ |
| 85 | #define _BYTE_ORDER _BIG_ENDIAN |
| 86 | #else |
| 87 | #define _BYTE_ORDER _LITTLE_ENDIAN |
| 88 | #endif |
| 89 | #define __STRICT_ALIGNMENT |
| 90 | #include <sys/types.h> |
| 91 | #include <sys/endian.h> |
| Jim Huang | aa35095 | 2010-08-31 14:51:44 +0800 | [diff] [blame^] | 92 | |
| 93 | #endif /* !_ARM_ENDIAN_H_ */ |