#ifndef __ASM_ARM_DIV64#define __ASM_ARM_DIV64 #include <asm/system.h> /* * The semantics of do_div() are: * * uint32_t do_div(uint64_t *n, uint32_t base) * { * 	uint32_t remainder = *n % base; * 	*n = *n / base; * 	return remainder; * } * * In other words, a 64-bit dividend with a 32-bit divisor producing * a 64-bit result and a 32-bit remainder.  To accomplish this optimally * we call a special __do_div64 helper with completely non standard * calling convention for arguments and results (beware). */ #ifdef __ARMEB__#define __xh "r0"#define __xl "r1"#else#define __xl "r0"#define __xh "r1"#endif #define do_div(n,base)						\({								\	register unsigned int __base      asm("r4") = base;	\	register unsigned long long __n   asm("r0") = n;	\	register unsigned long long __res asm("r2");		\	register unsigned int __rem       asm(__xh);		\	asm(	__asmeq("%0", __xh)				\		__asmeq("%1", "r2")				\		__asmeq("%2", "r0")				\		__asmeq("%3", "r4")				\		"bl	__do_div64"				\		: "=r" (__rem), "=r" (__res)			\		: "r" (__n), "r" (__base)			\		: "ip", "lr", "cc");				\	n = __res;						\	__rem;							\}) #endif