test/Unit/divmodsi4_test.c

//===-- divmodsi4_test.c - Test __divmodsi4 -------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file tests __divmodsi4 for the compiler_rt library.
//
//===----------------------------------------------------------------------===//

#include "int_lib.h"
#include <stdio.h>

// Returns: a / b

extern si_int __divmodsi4(si_int a, si_int b, si_int* rem);


int test__divmodsi4(si_int a, si_int b, 
						si_int expected_result, si_int expected_rem)
{
	si_int rem;
    si_int result = __divmodsi4(a, b, &rem);
    if (result != expected_result) {
        printf("error in __divmodsi4: %d / %d = %d, expected %d\n",
               a, b, result, expected_result);
		return 1;
	}
    if (rem != expected_rem) {
        printf("error in __divmodsi4: %d mod %d = %d, expected %d\n",
               a, b, rem, expected_rem);
		return 1;
	}
	
    return 0;
}


int main()
{
    if (test__divmodsi4(0, 1, 0, 0))
        return 1;
    if (test__divmodsi4(0, -1, 0, 0))
        return 1;

    if (test__divmodsi4(2, 1, 2, 0))
        return 1;
    if (test__divmodsi4(2, -1, -2, 0))
        return 1;
    if (test__divmodsi4(-2, 1, -2, 0))
        return 1;
    if (test__divmodsi4(-2, -1, 2, 0))
        return 1;

	if (test__divmodsi4(7, 5, 1, 2))
        return 1;
	if (test__divmodsi4(-7, 5, -1, -2))
        return 1;
	if (test__divmodsi4(19, 5, 3, 4))
        return 1;
	if (test__divmodsi4(19, -5, -3, 4))
        return 1;
  	
	if (test__divmodsi4(0x80000000, 8, 0xf0000000, 0))
        return 1;
	if (test__divmodsi4(0x80000007, 8, 0xf0000001, -1))
        return 1;

    return 0;
}