diff options
| -rw-r--r-- | libc/arch-arm/include/endian.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/libc/arch-arm/include/endian.h b/libc/arch-arm/include/endian.h index 04204ed..e34872f 100644 --- a/libc/arch-arm/include/endian.h +++ b/libc/arch-arm/include/endian.h @@ -1,5 +1,86 @@ /* $OpenBSD: endian.h,v 1.3 2005/12/13 00:35:23 millert Exp $ */ +/* + * Copyright (C) 2010 The Android Open Source Project + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef _ARM_ENDIAN_H_ +#define _ARM_ENDIAN_H_ + +#ifdef __GNUC__ + +/* NOTE: header <machine/cpu-features.h> could not be included directly + * since it defines extra macros, such as PLD. + */ +#if defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7R__) || \ + defined(__ARM_ARCH_7__) || \ + defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || \ + defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) || \ + defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_6T2__) + +/* According to RealView Assembler User's Guide, REV and REV16 are available + * in Thumb code and 16-bit instructions when used in Thumb-2 code. + * + * REV Rd, Rm + * Rd and Rm must both be Lo registers. + * + * REV16 Rd, Rm + * Rd and Rm must both be Lo registers. + */ +#ifdef __thumb__ +#define REV_LO_REG asm("r4") +#else +#define REV_LO_REG +#endif + +#define __swap16md(x) ({ \ + register u_int16_t _x REV_LO_REG = (x); \ + __asm volatile ("rev16 %0, %0" : "+r" (_x)); \ + _x; \ +}) + +#define __swap32md(x) ({ \ + register u_int32_t _x REV_LO_REG = (x); \ + __asm volatile ("rev %0, %0" : "+r" (_x)); \ + _x; \ +}) + +#define __swap64md(x) ({ \ + u_int64_t _x = (x); \ + (u_int64_t) __swap32md(_x >> 32) | \ + (u_int64_t) __swap32md(_x & 0xffffffff) << 32; \ +}) + +/* Tell sys/endian.h we have MD variants of the swap macros. */ +#define MD_SWAP + +#endif /* __ARM_ARCH__ */ +#endif /* __GNUC__ */ + #ifdef __ARMEB__ #define _BYTE_ORDER _BIG_ENDIAN #else @@ -8,3 +89,5 @@ #define __STRICT_ALIGNMENT #include <sys/types.h> #include <sys/endian.h> + +#endif /* !_ARM_ENDIAN_H_ */ |