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authorUlrich Drepper <drepper@redhat.com>1999-07-14 00:54:57 +0000
committerUlrich Drepper <drepper@redhat.com>1999-07-14 00:54:57 +0000
commitabfbdde177c3a7155070dda1b2cdc8292054cc26 (patch)
treee021306b596381fbf8311d2b7eb294e918ff17c8 /sysdeps/ieee754/dbl2mpn.c
parent86421aa57ecfd70963ae66848bd6a6dd3b8e0fe6 (diff)
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Update.
Diffstat (limited to 'sysdeps/ieee754/dbl2mpn.c')
-rw-r--r--sysdeps/ieee754/dbl2mpn.c107
1 files changed, 0 insertions, 107 deletions
diff --git a/sysdeps/ieee754/dbl2mpn.c b/sysdeps/ieee754/dbl2mpn.c
deleted file mode 100644
index f7dead4936..0000000000
--- a/sysdeps/ieee754/dbl2mpn.c
+++ /dev/null
@@ -1,107 +0,0 @@
-/* Copyright (C) 1993, 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Library General Public License as
-   published by the Free Software Foundation; either version 2 of the
-   License, or (at your option) any later version.
-
-   The GNU C Library 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
-   Library General Public License for more details.
-
-   You should have received a copy of the GNU Library General Public
-   License along with the GNU C Library; see the file COPYING.LIB.  If not,
-   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-   Boston, MA 02111-1307, USA.  */
-
-#include "gmp.h"
-#include "gmp-impl.h"
-#include "longlong.h"
-#include <ieee754.h>
-#include <float.h>
-#include <stdlib.h>
-
-/* Convert a `double' in IEEE754 standard double-precision format to a
-   multi-precision integer representing the significand scaled up by its
-   number of bits (52 for double) and an integral power of two (MPN frexp). */
-
-mp_size_t
-__mpn_extract_double (mp_ptr res_ptr, mp_size_t size,
-		      int *expt, int *is_neg,
-		      double value)
-{
-  union ieee754_double u;
-  u.d = value;
-
-  *is_neg = u.ieee.negative;
-  *expt = (int) u.ieee.exponent - IEEE754_DOUBLE_BIAS;
-
-#if BITS_PER_MP_LIMB == 32
-  res_ptr[0] = u.ieee.mantissa1; /* Low-order 32 bits of fraction.  */
-  res_ptr[1] = u.ieee.mantissa0; /* High-order 20 bits.  */
-  #define N 2
-#elif BITS_PER_MP_LIMB == 64
-  /* Hopefully the compiler will combine the two bitfield extracts
-     and this composition into just the original quadword extract.  */
-  res_ptr[0] = ((unsigned long int) u.ieee.mantissa0 << 32) | u.ieee.mantissa1;
-  #define N 1
-#else
-  #error "mp_limb size " BITS_PER_MP_LIMB "not accounted for"
-#endif
-/* The format does not fill the last limb.  There are some zeros.  */
-#define NUM_LEADING_ZEROS (BITS_PER_MP_LIMB \
-			   - (DBL_MANT_DIG - ((N - 1) * BITS_PER_MP_LIMB)))
-
-  if (u.ieee.exponent == 0)
-    {
-      /* A biased exponent of zero is a special case.
-	 Either it is a zero or it is a denormal number.  */
-      if (res_ptr[0] == 0 && res_ptr[N - 1] == 0) /* Assumes N<=2.  */
-	/* It's zero.  */
-	*expt = 0;
-      else
-	{
-          /* It is a denormal number, meaning it has no implicit leading
-	     one bit, and its exponent is in fact the format minimum.  */
-	  int cnt;
-
-	  if (res_ptr[N - 1] != 0)
-	    {
-	      count_leading_zeros (cnt, res_ptr[N - 1]);
-	      cnt -= NUM_LEADING_ZEROS;
-#if N == 2
-	      res_ptr[N - 1] = res_ptr[1] << cnt
-			       | (N - 1)
-			         * (res_ptr[0] >> (BITS_PER_MP_LIMB - cnt));
-	      res_ptr[0] <<= cnt;
-#else
-	      res_ptr[N - 1] <<= cnt;
-#endif
-	      *expt = DBL_MIN_EXP - 1 - cnt;
-	    }
-	  else
-	    {
-	      count_leading_zeros (cnt, res_ptr[0]);
-	      if (cnt >= NUM_LEADING_ZEROS)
-		{
-		  res_ptr[N - 1] = res_ptr[0] << (cnt - NUM_LEADING_ZEROS);
-		  res_ptr[0] = 0;
-		}
-	      else
-		{
-		  res_ptr[N - 1] = res_ptr[0] >> (NUM_LEADING_ZEROS - cnt);
-		  res_ptr[0] <<= BITS_PER_MP_LIMB - (NUM_LEADING_ZEROS - cnt);
-		}
-	      *expt = DBL_MIN_EXP - 1
-		      - (BITS_PER_MP_LIMB - NUM_LEADING_ZEROS) - cnt;
-	    }
-	}
-    }
-  else
-    /* Add the implicit leading one bit for a normalized number.  */
-    res_ptr[N - 1] |= 1L << (DBL_MANT_DIG - 1 - ((N - 1) * BITS_PER_MP_LIMB));
-
-  return N;
-}