contrib/syslinux-4.02/com32/lib/libgcc/__udivmoddi4.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32

#include <klibc/diverr.h>
#include <stdint.h>

uint64_t __udivmoddi4(uint64_t num, uint64_t den, uint64_t * rem_p)
{
    uint64_t quot = 0, qbit = 1;

    if (den == 0) {
	__divide_error();
	return 0;		/* If trap returns... */
    }

    /* Left-justify denominator and count shift */
    while ((int64_t) den >= 0) {
	den <<= 1;
	qbit <<= 1;
    }

    while (qbit) {
	if (den <= num) {
	    num -= den;
	    quot += qbit;
	}
	den >>= 1;
	qbit >>= 1;
    }

    if (rem_p)
	*rem_p = num;

    return quot;
}