| #include <limits.h> |
| |
| extern void abort (); |
| |
| int test1(int x) |
| { |
| return ~(x ^ INT_MIN); |
| } |
| |
| unsigned int test1u(unsigned int x) |
| { |
| return ~(x ^ (unsigned int)INT_MIN); |
| } |
| |
| unsigned int test2u(unsigned int x) |
| { |
| return ~(x + (unsigned int)INT_MIN); |
| } |
| |
| unsigned int test3u(unsigned int x) |
| { |
| return ~(x - (unsigned int)INT_MIN); |
| } |
| |
| int test4(int x) |
| { |
| int y = INT_MIN; |
| return ~(x ^ y); |
| } |
| |
| unsigned int test4u(unsigned int x) |
| { |
| unsigned int y = (unsigned int)INT_MIN; |
| return ~(x ^ y); |
| } |
| |
| unsigned int test5u(unsigned int x) |
| { |
| unsigned int y = (unsigned int)INT_MIN; |
| return ~(x + y); |
| } |
| |
| unsigned int test6u(unsigned int x) |
| { |
| unsigned int y = (unsigned int)INT_MIN; |
| return ~(x - y); |
| } |
| |
| |
| |
| void test(int a, int b) |
| { |
| if (test1(a) != b) |
| abort(); |
| if (test4(a) != b) |
| abort(); |
| } |
| |
| void testu(unsigned int a, unsigned int b) |
| { |
| if (test1u(a) != b) |
| abort(); |
| if (test2u(a) != b) |
| abort(); |
| if (test3u(a) != b) |
| abort(); |
| if (test4u(a) != b) |
| abort(); |
| if (test5u(a) != b) |
| abort(); |
| if (test6u(a) != b) |
| abort(); |
| } |
| |
| |
| int main() |
| { |
| #if INT_MAX == 2147483647 |
| test(0x00000000,0x7fffffff); |
| test(0x80000000,0xffffffff); |
| test(0x12345678,0x6dcba987); |
| test(0x92345678,0xedcba987); |
| test(0x7fffffff,0x00000000); |
| test(0xffffffff,0x80000000); |
| |
| testu(0x00000000,0x7fffffff); |
| testu(0x80000000,0xffffffff); |
| testu(0x12345678,0x6dcba987); |
| testu(0x92345678,0xedcba987); |
| testu(0x7fffffff,0x00000000); |
| testu(0xffffffff,0x80000000); |
| #endif |
| |
| #if INT_MAX == 32767 |
| test(0x0000,0x7fff); |
| test(0x8000,0xffff); |
| test(0x1234,0x6dcb); |
| test(0x9234,0xedcb); |
| test(0x7fff,0x0000); |
| test(0xffff,0x8000); |
| |
| testu(0x0000,0x7fff); |
| testu(0x8000,0xffff); |
| testu(0x1234,0x6dcb); |
| testu(0x9234,0xedcb); |
| testu(0x7fff,0x0000); |
| testu(0xffff,0x8000); |
| #endif |
| |
| return 0; |
| } |
| |