Viewing file:  div64.h (1.38 KB) -rw-r--r--
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#ifndef __ASM_PARISC_DIV64
#define __ASM_PARISC_DIV64
#ifdef __LP64__
/*
* Copyright (C) 1999 Hewlett-Packard Co
* Copyright (C) 1999 David Mosberger-Tang <davidm@hpl.hp.com>
*
* vsprintf uses this to divide a 64-bit integer N by a small integer BASE.
* This is incredibly hard on IA-64 and HPPA
*/
#define do_div(n,base) \
({ \
int _res; \
_res = ((unsigned long) (n)) % (unsigned) (base); \
(n) = ((unsigned long) (n)) / (unsigned) (base); \
_res; \
})
#else
/*
* unsigned long long division. Yuck Yuck! What is Linux coming to?
* This is 100% disgusting
*/
#define do_div(n,base) \
({ \
unsigned long __low, __low2, __high, __rem; \
__low = (n) & 0xffffffff; \
__high = (n) >> 32; \
if (__high) { \
__rem = __high % (unsigned long)base; \
__high = __high / (unsigned long)base; \
__low2 = __low >> 16; \
__low2 += __rem << 16; \
__rem = __low2 % (unsigned long)base; \
__low2 = __low2 / (unsigned long)base; \
__low = __low & 0xffff; \
__low += __rem << 16; \
__rem = __low % (unsigned long)base; \
__low = __low / (unsigned long)base; \
n = __low + ((long long)__low2 << 16) + \
((long long) __high << 32); \
} else { \
__rem = __low % (unsigned long)base; \
n = (__low / (unsigned long)base); \
} \
__rem; \
})
#endif
#endif
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