X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Ffrexpl.c;h=d6f0d7650d3f4b6d8875c50f73b6898ca817aa78;hb=952be23bc009785c91c76e8dbb29c73001e3267a;hp=cdc3ad86b5c72ef7693e15f1671451a450576451;hpb=5657b2536d242966c41c268b9ab4fe8df727bb13;p=gnulib.git

diff --git a/lib/frexpl.c b/lib/frexpl.c
index cdc3ad86b..d6f0d7650 100644
--- a/lib/frexpl.c
+++ b/lib/frexpl.c
@@ -1,103 +1,18 @@
-/* Emulation for frexpl.
-   Contributed by Paolo Bonzini
+/* Split a 'long double' into fraction and mantissa.
+   Copyright (C) 2007 Free Software Foundation, Inc.
 
-   Copyright 2002, 2003 Free Software Foundation, Inc.
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
 
-   This file is part of gnulib.
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
 
-   gnulib is free software; you can redistribute it and/or modify it
-   under the terms of the GNU Lesser General Public License as published
-   by the Free Software Foundation; either version 2.1, or (at your option)
-   any later version.
-
-   gnulib is distributed in the hope that it will be useful, but WITHOUT
-   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
-   License for more details.
-
-   You should have received a copy of the GNU Lesser General Public License
-   along with gnulib; see the file COPYING.LIB.  If not, write to the Free
-   Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
-   USA.
- */
-
-#include <float.h>
-#include <math.h>
-
-#include "mathl.h"
-
-/* Binary search.  Quite inefficient but portable. */
-long double
-frexpl(long double x, int *exp)
-{
-  long double exponents[20], *next;
-  int exponent, bit;
-
-  /* Check for zero, nan and infinity. */
-  if (x != x || x + x == x )
-    {
-      *exp = 0;
-      return x;
-    }
-
-  if (x < 0)
-    return -frexpl(-x, exp);
-
-  exponent = 0;
-  if (x > 1.0)
-    {
-      for (next = exponents, exponents[0] = 2.0L, bit = 1;
-	   *next <= x + x;
-	   bit <<= 1, next[1] = next[0] * next[0], next++);
-
-      for (; next >= exponents; bit >>= 1, next--)
-	if (x + x >= *next)
-	  {
-	    x /= *next;
-	    exponent |= bit;
-	  }
-
-    }
-
-  else if (x < 0.5)
-    {
-      for (next = exponents, exponents[0] = 0.5L, bit = 1;
-	   *next > x;
-	   bit <<= 1, next[1] = next[0] * next[0], next++);
-
-      for (; next >= exponents; bit >>= 1, next--)
-	if (x < *next)
-	  {
-	    x /= *next;
-	    exponent |= bit;
-	  }
-
-      exponent = -exponent;
-    }
-
-  *exp = exponent;
-  return x;
-}
-
-#if 0
-int
-main()
-{
-  long double x;
-  int y;
-  x = frexpl(0.0L / 0.0L, &y); printf ("%.6Lg %d\n", x, y);
-  x = frexpl(1.0L / 0.0L, &y); printf ("%.6Lg %d\n", x, y);
-  x = frexpl(-1.0L / 0.0L, &y); printf ("%.6Lg %d\n", x, y);
-  x = frexpl(0.5L, &y); printf ("%.6Lg %d\n", x, y);
-  x = frexpl(0.75L, &y); printf ("%.6Lg %d\n", x, y);
-  x = frexpl(3.6L, &y); printf ("%.6Lg %d\n", x, y);
-  x = frexpl(17.8L, &y); printf ("%.6Lg %d\n", x, y);
-  x = frexpl(8.0L, &y); printf ("%.6Lg %d\n", x, y);
-  x = frexpl(0.3L, &y); printf ("%.6Lg %d\n", x, y);
-  x = frexpl(0.49L, &y); printf ("%.6Lg %d\n", x, y);
-  x = frexpl(0.049L, &y); printf ("%.6Lg %d\n", x, y);
-  x = frexpl(0.0245L, &y); printf ("%.6Lg %d\n", x, y);
-  x = frexpl(0.0625L, &y); printf ("%.6Lg %d\n", x, y);
-}
-#endif
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
+#define USE_LONG_DOUBLE
+#include "frexp.c"