diff options
Diffstat (limited to 'mdk-stage1/dietlibc/lib/__isinf.c')
| -rw-r--r-- | mdk-stage1/dietlibc/lib/__isinf.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/lib/__isinf.c b/mdk-stage1/dietlibc/lib/__isinf.c new file mode 100644 index 000000000..359bd2709 --- /dev/null +++ b/mdk-stage1/dietlibc/lib/__isinf.c @@ -0,0 +1,15 @@ +#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 |