| #include <stdio.h> | |
| #include <math.h> | |
| int target_isinf(double x) { | |
| union { | |
| double d; | |
| struct { | |
| unsigned mantissa2; | |
| unsigned mantissa1 : 20; | |
| unsigned exponent : 11; | |
| unsigned sign : 1; | |
| } big_endian; | |
| } u; | |
| u.d = x; | |
| return (u.big_endian.exponent == 2047 && u.big_endian.mantissa1 == 0 && u.big_endian.mantissa2 == 0); | |
| } | |
| int main() { | |
| printf("%d %d\n", target_isinf(1234.42), target_isinf(1.0/5.0e-324)); | |
| return 0; | |
| } |