diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-96/s_scalblnl.c')
-rw-r--r-- | sysdeps/ieee754/ldbl-96/s_scalblnl.c | 60 |
1 files changed, 0 insertions, 60 deletions
diff --git a/sysdeps/ieee754/ldbl-96/s_scalblnl.c b/sysdeps/ieee754/ldbl-96/s_scalblnl.c deleted file mode 100644 index 457e999c6c..0000000000 --- a/sysdeps/ieee754/ldbl-96/s_scalblnl.c +++ /dev/null @@ -1,60 +0,0 @@ -/* s_scalbnl.c -- long double version of s_scalbn.c. - * Conversion to long double by Ulrich Drepper, - * Cygnus Support, drepper@cygnus.com. - */ - -/* - * ==================================================== - * 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. - * ==================================================== - */ - -/* - * scalbnl (long double x, int n) - * scalbnl(x,n) returns x* 2**n computed by exponent - * manipulation rather than by actually performing an - * exponentiation or a multiplication. - */ - -#include <math.h> -#include <math_private.h> - -static const long double -two63 = 0x1p63L, -twom64 = 0x1p-64L, -huge = 1.0e+4900L, -tiny = 1.0e-4900L; - -long double -__scalblnl (long double x, long int n) -{ - int32_t k,es,hx,lx; - GET_LDOUBLE_WORDS(es,hx,lx,x); - k = es&0x7fff; /* extract exponent */ - if (__builtin_expect(k==0, 0)) { /* 0 or subnormal x */ - if ((lx|(hx&0x7fffffff))==0) return x; /* +-0 */ - x *= two63; - GET_LDOUBLE_EXP(es,x); - k = (es&0x7fff) - 63; - } - if (__builtin_expect(k==0x7fff, 0)) return x+x; /* NaN or Inf */ - if (__builtin_expect(n< -50000, 0)) - return tiny*__copysignl(tiny,x); - if (__builtin_expect(n> 50000 || k+n > 0x7ffe, 0)) - return huge*__copysignl(huge,x); /* overflow */ - /* Now k and n are bounded we know that k = k+n does not - overflow. */ - k = k+n; - if (__builtin_expect(k > 0, 1)) /* normal result */ - {SET_LDOUBLE_EXP(x,(es&0x8000)|k); return x;} - if (k <= -64) - return tiny*__copysignl(tiny,x); /*underflow*/ - k += 64; /* subnormal result */ - SET_LDOUBLE_EXP(x,(es&0x8000)|k); - return x*twom64; -} |