X-Git-Url: https://oss.titaniummirror.com/gitweb/?a=blobdiff_plain;f=libjava%2Fjava%2Flang%2Fs_scalbn.c;fp=libjava%2Fjava%2Flang%2Fs_scalbn.c;h=0000000000000000000000000000000000000000;hb=6fed43773c9b0ce596dca5686f37ac3fc0fa11c0;hp=36ee88981bab63476803af2f4d79876976af97ec;hpb=27b11d56b743098deb193d510b337ba22dc52e5c;p=msp430-gcc.git diff --git a/libjava/java/lang/s_scalbn.c b/libjava/java/lang/s_scalbn.c deleted file mode 100644 index 36ee8898..00000000 --- a/libjava/java/lang/s_scalbn.c +++ /dev/null @@ -1,104 +0,0 @@ - -/* @(#)s_scalbn.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. - * ==================================================== - */ - -/* -FUNCTION -<>, <>---scale by integer -INDEX - scalbn -INDEX - scalbnf - -ANSI_SYNOPSIS - #include - double scalbn(double <[x]>, int <[y]>); - float scalbnf(float <[x]>, int <[y]>); - -TRAD_SYNOPSIS - #include - double scalbn(<[x]>,<[y]>) - double <[x]>; - int <[y]>; - float scalbnf(<[x]>,<[y]>) - float <[x]>; - int <[y]>; - -DESCRIPTION -<> and <> scale <[x]> by <[n]>, returning <[x]> times -2 to the power <[n]>. The result is computed by manipulating the -exponent, rather than by actually performing an exponentiation or -multiplication. - -RETURNS -<[x]> times 2 to the power <[n]>. - -PORTABILITY -Neither <> nor <> is required by ANSI C or by the System V -Interface Definition (Issue 2). - -*/ - -/* - * scalbn (double x, int n) - * scalbn(x,n) returns x* 2**n computed by exponent - * manipulation rather than by actually performing an - * exponentiation or a multiplication. - */ - -#include "fdlibm.h" - -#ifndef _DOUBLE_IS_32BITS - -#ifdef __STDC__ -static const double -#else -static double -#endif -two54 = 1.80143985094819840000e+16, /* 0x43500000, 0x00000000 */ -twom54 = 5.55111512312578270212e-17, /* 0x3C900000, 0x00000000 */ -huge = 1.0e+300, -tiny = 1.0e-300; - -#ifdef __STDC__ - double scalbn (double x, int n) -#else - double scalbn (x,n) - double x; int n; -#endif -{ - int32_t k,hx,lx; - EXTRACT_WORDS(hx,lx,x); - k = (hx&0x7ff00000)>>20; /* extract exponent */ - if (k==0) { /* 0 or subnormal x */ - if ((lx|(hx&0x7fffffff))==0) return x; /* +-0 */ - x *= two54; - GET_HIGH_WORD(hx,x); - k = ((hx&0x7ff00000)>>20) - 54; - if (n< -50000) return tiny*x; /*underflow*/ - } - if (k==0x7ff) return x+x; /* NaN or Inf */ - k = k+n; - if (k > 0x7fe) return huge*copysign(huge,x); /* overflow */ - if (k > 0) /* normal result */ - {SET_HIGH_WORD(x,(hx&0x800fffff)|(k<<20)); return x;} - if (k <= -54) { - if (n > 50000) /* in case integer overflow in n+k */ - return huge*copysign(huge,x); /*overflow*/ - else return tiny*copysign(tiny,x); /*underflow*/ - } - k += 54; /* subnormal result */ - SET_HIGH_WORD(x,(hx&0x800fffff)|(k<<20)); - return x*twom54; -} - -#endif /* _DOUBLE_IS_32BITS */