X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;ds=sidebyside;f=src%2Fmath%2Fs_ilogb.c;fp=src%2Fmath%2Fs_ilogb.c;h=0000000000000000000000000000000000000000;hb=b69f695acedd4ce2798ef9ea28d834ceccc789bd;hp=f1ac498a727c3b768e8e225a0a72bba1f9ee22fb;hpb=d46cf2e14cc4df7cc75e77d7009fcb6df1f48a33;p=musl diff --git a/src/math/s_ilogb.c b/src/math/s_ilogb.c deleted file mode 100644 index f1ac498a..00000000 --- a/src/math/s_ilogb.c +++ /dev/null @@ -1,45 +0,0 @@ -/* @(#)s_ilogb.c 5.1 93/09/24 */ -/* - * ==================================================== - * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. - * - * Developed at SunPro, a Sun Microsystems, Inc. business. - * Permission to use, copy, modify, and distribute this - * software is freely granted, provided that this notice - * is preserved. - * ==================================================== - */ - -/* ilogb(double x) - * return the binary exponent of non-zero x - * ilogb(0) = FP_ILOGB0 - * ilogb(NaN) = FP_ILOGBNAN (no signal is raised) - * ilogb(inf) = INT_MAX (no signal is raised) - */ - -#include - -#include -#include "math_private.h" - -int ilogb(double x) -{ - int32_t hx,lx,ix; - - EXTRACT_WORDS(hx,lx,x); - hx &= 0x7fffffff; - if(hx<0x00100000) { - if((hx|lx)==0) - return FP_ILOGB0; - else /* subnormal x */ - if(hx==0) { - for (ix = -1043; lx>0; lx<<=1) ix -=1; - } else { - for (ix = -1022,hx<<=11; hx>0; hx<<=1) ix -=1; - } - return ix; - } - else if (hx<0x7ff00000) return (hx>>20)-1023; - else if (hx>0x7ff00000 || lx!=0) return FP_ILOGBNAN; - else return INT_MAX; -}