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Added isnan.c

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ceriel 1991-06-04 15:33:34 +00:00
parent 659d310e37
commit 3e9b9b3cbe
1 changed files with 11 additions and 0 deletions
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11
lang/cem/libcc.ansi/math/isnan.c Normal file
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@ -0,0 +1,11 @@
__IsNan(double d)
{
#if defined(vax) || defined(pdp)
#else
float f = d;
if ((*((long *) &f) & 0x7f800000) == 0x7f800000 &&
(*((long *) &f) & 0x007fffff) != 0) return 1;
#endif
return 0;
}