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48 lines
980 B
48 lines
980 B
4 months ago
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/*
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* Copyright (c) Hisilicon Technologies Co., Ltd. 2020-2020. All rights reserved.
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* Description: printf function
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* Author: SmartMedia_BSP
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* Create: 2020-06-04
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*/
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#include <td_type.h>
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#include <stdlib.h>
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uint32_t div64_32(uint64_t *num, uint32_t div)
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{
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uint64_t remainder;
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uint64_t d = div;
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uint64_t quotient = 0;
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uint64_t q = 1;
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uint32_t high;
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if (num == NULL) {
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return 0;
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}
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remainder = *num;
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high = (*num) >> 32; /* shift 32 bit */
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if ((div != 0) && (high >= div)) {
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high /= div;
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quotient = (uint64_t)high << 32; /* shift 32 bit */
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remainder -= (uint64_t)(high * div) << 32; /* shift 32 bit */
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}
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while ((int64_t)d > 0 && d < remainder) {
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d = d + d;
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q = q + q;
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}
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do {
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if (remainder >= d) {
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remainder -= d;
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quotient += q;
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}
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d >>= 1;
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q >>= 1;
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} while (q);
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*num = quotient;
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return remainder;
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}
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