mirror of https://github.com/cc65/cc65.git
102 lines
2.8 KiB
C
102 lines
2.8 KiB
C
/* #1675 - Some corner cases of bit-shifts */
|
|
|
|
#include <stdio.h>
|
|
|
|
int failures = 0;
|
|
|
|
void Test_Defined(void)
|
|
{
|
|
{
|
|
/* Well-defined per standard, lhs expected in cc65: (int)-256 */
|
|
if (!(((signed char)0x80 << 1) < 0)) {
|
|
++failures;
|
|
printf("Expected: ((signed char)0x80 << 1) < 0, got lhs: %ld\n", (long)((signed char)0x80 << 1));
|
|
}
|
|
}
|
|
|
|
{
|
|
/* Implementation-defined per standard, lhs expected in cc65: (int)-128 */
|
|
if (!(((signed char)0x80 >> 1 << 1) < 0)) {
|
|
++failures;
|
|
printf("Expected: ((signed char)0x80 >> 1 << 1) < 0, got lhs: %ld\n", (long)((signed char)0x80 >> 1 << 1));
|
|
}
|
|
}
|
|
|
|
{
|
|
int x = 0;
|
|
/* Well-defined per standard, lhs expected in cc65: (int)1 */
|
|
if (!((1 << (x++, 0)) == 1)) {
|
|
++failures;
|
|
x = 0;
|
|
printf("Expected: (1 << (x++, 0)) == 1, got lhs: %ld\n", (long)(1 << (x++, 0)));
|
|
}
|
|
|
|
/* Well-defined per standard, lhs expected in cc65: (int)1 */
|
|
if (!(x == 1)) {
|
|
++failures;
|
|
printf("Expected: (1 << (x++, 0)) == 1 && x == 1, got x: %d\n", x);
|
|
}
|
|
}
|
|
|
|
{
|
|
int x = 0, y = 0x100;
|
|
/* Well-defined per standard, lhs expected in cc65: (int)128 */
|
|
if (!((y >> (x++, 0) >> 1) == 0x80)) {
|
|
++failures;
|
|
x = 0;
|
|
printf("Expected: (y >> (x++, 0) >> 1) == 0x80, got lhs: %ld\n", (long)(y >> (x++, 0) >> 1));
|
|
}
|
|
|
|
/* Well-defined per standard, lhs expected in cc65: (int)1 */
|
|
if (!(x == 1)) {
|
|
++failures;
|
|
printf("Expected: (y >> (x++, 0) >> 1) == 0x80 && x == 1, got x: %d\n", x);
|
|
}
|
|
}
|
|
|
|
{
|
|
int x = 0, y = 0x100;
|
|
/* Well-defined per standard, lhs expected in cc65: (int)1 */
|
|
if (!((y >> (x++, 8)) == 1)) {
|
|
++failures;
|
|
x = 0;
|
|
printf("Expected: (y >> (x++, 8)) == 1, got lhs: %ld\n", (long)(y >> (x++, 8)));
|
|
}
|
|
|
|
/* Well-defined per standard, lhs expected in cc65: (int)1 */
|
|
if (!(x == 1)) {
|
|
++failures;
|
|
printf("Expected: (y >> (x++, 8)) == 1 && x == 1, got x: %d\n", x);
|
|
}
|
|
}
|
|
|
|
{
|
|
const signed char x = 0x80;
|
|
/* Well-defined per standard, lhs expected in cc65: (int)-256 */
|
|
if (!((x << 1) < 0)) {
|
|
++failures;
|
|
printf("Expected: (x << 1) < 0, got lhs: %ld\n", (long)(x << 1));
|
|
}
|
|
}
|
|
|
|
{
|
|
const signed char x = 0x40;
|
|
/* Well-defined per standard, lhs expected in cc65: (int)128 */
|
|
if (!((x << 1) >= 0)) {
|
|
++failures;
|
|
printf("Expected: (x << 1) >= 0, got lhs: %ld\n", (long)(x << 1));
|
|
}
|
|
}
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
Test_Defined();
|
|
|
|
if (failures != 0) {
|
|
printf("Failures: %d\n", failures);
|
|
}
|
|
|
|
return failures;
|
|
}
|