1 /**************************************************************************** 2 **************************************************************************** 3 *** 4 *** This header was automatically generated from a Linux kernel header 5 *** of the same name, to make information necessary for userspace to 6 *** call into the kernel available to libc. It contains only constants, 7 *** structures, and macros generated from the original header, and thus, 8 *** contains no copyrightable information. 9 *** 10 **************************************************************************** 11 ****************************************************************************/ 12 #ifndef __ASM_ARM_BYTEORDER_H 13 #define __ASM_ARM_BYTEORDER_H 14 15 #include <linux/compiler.h> 16 #include <asm/types.h> 17 ___arch__swab32(__u32 x)18static inline __attribute_const__ __u32 ___arch__swab32(__u32 x) 19 { 20 __u32 t; 21 22 #ifndef __thumb__ 23 if (!__builtin_constant_p(x)) { 24 25 __asm__ ("eor\t%0, %1, %1, ror #16" : "=r" (t) : "r" (x)); 26 } else 27 #endif 28 t = x ^ ((x << 16) | (x >> 16)); 29 30 x = (x << 24) | (x >> 8); 31 t &= ~0x00FF0000; 32 x ^= (t >> 8); 33 34 return x; 35 } 36 37 #define __arch__swab32(x) ___arch__swab32(x) 38 39 #ifndef __STRICT_ANSI__ 40 #define __BYTEORDER_HAS_U64__ 41 #define __SWAB_64_THRU_32__ 42 #endif 43 44 #ifdef __ARMEB__ 45 #include <linux/byteorder/big_endian.h> 46 #else 47 #include <linux/byteorder/little_endian.h> 48 #endif 49 50 #endif 51 52