__divdi3.c

来自「klibc精简化的c程序库」· C语言 代码 · 共 30 行

/*
 * arch/i386/libgcc/__divdi3.c
 */

#include <stdint.h>
#include <stddef.h>

extern uint64_t __udivmoddi4(uint64_t num, uint64_t den, uint64_t * rem);

int64_t __divdi3(int64_t num, int64_t den)
{
	int minus = 0;
	int64_t v;

	if (num < 0) {
		num = -num;
		minus = 1;
	}
	if (den < 0) {
		den = -den;
		minus ^= 1;
	}

	v = __udivmoddi4(num, den, NULL);
	if (minus)
		v = -v;

	return v;
}