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