/* *  linux/include/asm-arm/byteorder.h * * ARM Endian-ness.  In little endian mode, the data bus is connected such * that byte accesses appear as: *  0 = d0...d7, 1 = d8...d15, 2 = d16...d23, 3 = d24...d31 * and word accesses (data or instruction) appear as: *  d0...d31 * * When in big endian mode, byte accesses appear as: *  0 = d24...d31, 1 = d16...d23, 2 = d8...d15, 3 = d0...d7 * and word accesses (data or instruction) appear as: *  d0...d31 */#ifndef __ASM_ARM_BYTEORDER_H#define __ASM_ARM_BYTEORDER_H #include <linux/compiler.h>#include <asm/types.h> static inline __attribute_const__ __u32 ___arch__swab32(__u32 x){	__u32 t; #ifndef __thumb__	if (!__builtin_constant_p(x)) {		/*		 * The compiler needs a bit of a hint here to always do the		 * right thing and not screw it up to different degrees		 * depending on the gcc version.		 */		asm ("eor\t%0, %1, %1, ror #16" : "=r" (t) : "r" (x));	} else#endif		t = x ^ ((x << 16) | (x >> 16)); /* eor r1,r0,r0,ror #16 */ 	x = (x << 24) | (x >> 8);		/* mov r0,r0,ror #8      */	t &= ~0x00FF0000;			/* bic r1,r1,#0x00FF0000 */	x ^= (t >> 8);				/* eor r0,r0,r1,lsr #8   */ 	return x;} #define __arch__swab32(x) ___arch__swab32(x) #if !defined(__STRICT_ANSI__) || defined(__KERNEL__)#  define __BYTEORDER_HAS_U64__#  define __SWAB_64_THRU_32__#endif #ifdef __ARMEB__#include <linux/byteorder/big_endian.h>#else#include <linux/byteorder/little_endian.h>#endif #endif