gists/c-programming/math/opt_int_div.test.c

/*
 * opt_int_div.c
 *
 * "Optimized integer division"
 *
 * Author: Intel A80486DX2-66
 * License: Creative Commons Zero 1.0 Universal
 */

#include "opt_int_div.h"

#include <inttypes.h>
#include <stdio.h>

int main(void) {
	printf("Loop: a > 0, b > 0\n");
	for (uint8_t a = 3; a <= 24; a++)
		for (uint8_t b = 1; b <= 8; b++) {
			if (b >= a)
				break;
			printf("%" PRIu8 " / %" PRIu8 " = %" PRIu8 "\n", a, b,
			       OPT_INT_DIV(a, b));
		}

	printf("Loop: a < 0, b > 0\n");
	for (int8_t a = -3; a >= -24; a--)
		for (int8_t b = 1; b <= 8; b++) {
			if (b >= abs(a))
				break;
			printf("%" PRId8 " / %" PRId8 " = %" PRId8 "\n", a, b,
			       OPT_INT_DIV(a, b));
		}

	printf("Loop: a < 0, b < 0\n");
	for (int8_t a = -3; a >= -24; a--)
		for (int8_t b = -1; b >= -8; b--) {
			if (b <= a)
				break;
			printf("%" PRId8 " / %" PRId8 " = %" PRId8 "\n", a, b,
			       OPT_INT_DIV(a, b));
		}

	return 0;
}