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/ast/src/lib/libast/uwin/
H A Dsupport.c67 * (c) logb(x)
69 * double precision, except that logb(0) is -INF, logb(INF)
70 * is +INF, and logb(NAN) is that NAN.
182 extern double logb(x) function
368 n=logb(x);
370 if((m=logb(x))!=0) x=scalb(x,-m); /* subnormal number */
600 return((int)logb(x));

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