summaryrefslogtreecommitdiff
path: root/sysdeps/ieee754/ldbl-128ibm/s_scalbnl.c
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/ieee754/ldbl-128ibm/s_scalbnl.c')
-rw-r--r--sysdeps/ieee754/ldbl-128ibm/s_scalbnl.c109
1 files changed, 0 insertions, 109 deletions
diff --git a/sysdeps/ieee754/ldbl-128ibm/s_scalbnl.c b/sysdeps/ieee754/ldbl-128ibm/s_scalbnl.c
deleted file mode 100644
index 50bd8cb0b6..0000000000
--- a/sysdeps/ieee754/ldbl-128ibm/s_scalbnl.c
+++ /dev/null
@@ -1,109 +0,0 @@
-/* s_scalbnl.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
-
-/*
- * 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"
-#include <math_ldbl_opt.h>
-
-#ifdef __STDC__
-static const long double
-#else
-static long double
-#endif
-twolm54 = 5.55111512312578270212e-17, /* 0x3C90000000000000, 0 */
-huge = 1.0E+300L,
-tiny = 1.0E-300L;
-#ifdef __STDC__
-static const double
-#else
-static double
-#endif
-two54 = 1.80143985094819840000e+16, /* 0x4350000000000000 */
-twom54 = 5.55111512312578270212e-17; /* 0x3C90000000000000 */
-
-#ifdef __STDC__
- long double __scalbnl (long double x, int n)
-#else
- long double __scalbnl (x,n)
- long double x; int n;
-#endif
-{
- int64_t k,l,hx,lx;
- union { int64_t i; double d; } u;
- GET_LDOUBLE_WORDS64(hx,lx,x);
- k = (hx>>52)&0x7ff; /* extract exponent */
- l = (lx>>52)&0x7ff;
- if (k==0) { /* 0 or subnormal x */
- if (((hx|lx)&0x7fffffffffffffffULL)==0) return x; /* +-0 */
- u.i = hx;
- u.d *= two54;
- hx = u.i;
- k = ((hx>>52)&0x7ff) - 54;
- }
- else if (k==0x7ff) return x+x; /* NaN or Inf */
- k = k+n;
- if (n> 50000 || k > 0x7fe)
- return huge*__copysignl(huge,x); /* overflow */
- if (n< -50000) return tiny*__copysignl(tiny,x); /*underflow */
- if (k > 0) { /* normal result */
- hx = (hx&0x800fffffffffffffULL)|(k<<52);
- if ((lx & 0x7fffffffffffffffULL) == 0) { /* low part +-0 */
- SET_LDOUBLE_WORDS64(x,hx,lx);
- return x;
- }
- if (l == 0) { /* low part subnormal */
- u.i = lx;
- u.d *= two54;
- lx = u.i;
- l = ((lx>>52)&0x7ff) - 54;
- }
- l = l + n;
- if (l > 0)
- lx = (lx&0x800fffffffffffffULL)|(l<<52);
- else if (l <= -54)
- lx = (lx&0x8000000000000000ULL);
- else {
- l += 54;
- u.i = (lx&0x800fffffffffffffULL)|(l<<52);
- u.d *= twom54;
- lx = u.i;
- }
- SET_LDOUBLE_WORDS64(x,hx,lx);
- return x;
- }
- if (k <= -54)
- return tiny*__copysignl(tiny,x); /*underflow*/
- k += 54; /* subnormal result */
- lx &= 0x8000000000000000ULL;
- SET_LDOUBLE_WORDS64(x,(hx&0x800fffffffffffffULL)|(k<<52),lx);
- return x*twolm54;
-}
-#ifdef IS_IN_libm
-long_double_symbol (libm, __scalbnl, scalbnl);
-#else
-long_double_symbol (libc, __scalbnl, scalbnl);
-#endif