mirror of https://gitee.com/openkylin/linux.git
39 lines
952 B
C
39 lines
952 B
C
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#ifndef _ASM_M32R_DIV64
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#define _ASM_M32R_DIV64
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/* $Id$ */
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/* unsigned long long division.
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* Input:
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* unsigned long long n
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* unsigned long base
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* Output:
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* n = n / base;
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* return value = n % base;
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*/
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#define do_div(n, base) \
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({ \
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unsigned long _res, _high, _mid, _low; \
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\
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_low = (n) & 0xffffffffUL; \
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_high = (n) >> 32; \
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if (_high) { \
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_mid = (_high % (unsigned long)(base)) << 16; \
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_high = _high / (unsigned long)(base); \
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_mid += _low >> 16; \
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_low &= 0x0000ffffUL; \
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_low += (_mid % (unsigned long)(base)) << 16; \
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_mid = _mid / (unsigned long)(base); \
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_res = _low % (unsigned long)(base); \
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_low = _low / (unsigned long)(base); \
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n = _low + ((long long)_mid << 16) + \
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((long long)_high << 32); \
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} else { \
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_res = _low % (unsigned long)(base); \
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n = (_low / (unsigned long)(base)); \
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} \
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_res; \
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})
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#endif /* _ASM_M32R_DIV64 */
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