?? __udivsi3.c
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/* * File : __udivsi3.c * This file is part of RT-Thread RTOS * COPYRIGHT (C) 2006, RT-Thread Develop Team * * The license and distribution terms for this file may be * found in the file LICENSE in this distribution or at * http://openlab.rt-thread.com/license/LICENSE * * Change Logs: * Date Author Notes * 2006-10-09 Bernard the first version for i386 */#include <rtthread.h>typedef rt_uint32_t uint32_t;typedef rt_int32 int32_t;uint32_t __udivsi3(uint32_t num, uint32_t den){ uint32_t quot = 0, qbit = 1; if (den == 0) { asm volatile ("int $0"); return 0; /* If trap returns... */ } /* Left-justify denominator and count shift */ while ((int32_t) den >= 0) { den <<= 1; qbit <<= 1; } while (qbit) { if (den <= num) { num -= den; quot += qbit; } den >>= 1; qbit >>= 1; } return quot;}
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