blob: 359bd27097d50b121d6ea0363f3aff414c2c966a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
|
#include <math.h>
int isinf(double d) {
unsigned long long *x=(unsigned long long *)&d;
return (*x==0x7FF0000000000000ll?1:*x==0xFFF0000000000000?-1:0);
}
int __isinf(double d) __attribute__((alias("isinf")));
#if 0
TestFromIeeeExtended("7FFF0000000000000000"); /* +infinity */
TestFromIeeeExtended("FFFF0000000000000000"); /* -infinity */
TestFromIeeeExtended("7FFF8001000000000000"); /* Quiet NaN(1) */
TestFromIeeeExtended("7FFF0001000000000000"); /* Signalling NaN(1) */
TestFromIeeeExtended("3FFFFEDCBA9876543210"); /* accuracy test */
#endif
|
