diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-128/s_scalblnl.c')
-rw-r--r-- | sysdeps/ieee754/ldbl-128/s_scalblnl.c | 62 |
1 files changed, 0 insertions, 62 deletions
diff --git a/sysdeps/ieee754/ldbl-128/s_scalblnl.c b/sysdeps/ieee754/ldbl-128/s_scalblnl.c deleted file mode 100644 index 5864eaf93c..0000000000 --- a/sysdeps/ieee754/ldbl-128/s_scalblnl.c +++ /dev/null @@ -1,62 +0,0 @@ -/* s_scalblnl.c -- long double version of s_scalbn.c. - * Conversion to IEEE quad long double by Jakub Jelinek, jj@ultra.linux.cz. - */ - -/* @(#)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. - * ==================================================== - */ - -#if defined(LIBM_SCCS) && !defined(lint) -static char rcsid[] = "$NetBSD: $"; -#endif - -/* - * scalblnl (long double x, long int n) - * scalblnl(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 _Float128 -two114 = L(2.0769187434139310514121985316880384E+34), /* 0x4071000000000000, 0 */ -twom114 = L(4.8148248609680896326399448564623183E-35), /* 0x3F8D000000000000, 0 */ -huge = L(1.0E+4900), -tiny = L(1.0E-4900); - -_Float128 __scalblnl (_Float128 x, long int n) -{ - int64_t k,hx,lx; - GET_LDOUBLE_WORDS64(hx,lx,x); - k = (hx>>48)&0x7fff; /* extract exponent */ - if (k==0) { /* 0 or subnormal x */ - if ((lx|(hx&0x7fffffffffffffffULL))==0) return x; /* +-0 */ - x *= two114; - GET_LDOUBLE_MSW64(hx,x); - k = ((hx>>48)&0x7fff) - 114; - } - if (k==0x7fff) return x+x; /* NaN or Inf */ - if (n< -50000) return tiny*__copysignl(tiny,x); /*underflow*/ - if (n> 50000 || k+n > 0x7ffe) - 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 (k > 0) /* normal result */ - {SET_LDOUBLE_MSW64(x,(hx&0x8000ffffffffffffULL)|(k<<48)); return x;} - if (k <= -114) - return tiny*__copysignl(tiny,x); /*underflow*/ - k += 114; /* subnormal result */ - SET_LDOUBLE_MSW64(x,(hx&0x8000ffffffffffffULL)|(k<<48)); - return x*twom114; -} |