OpenXM_contrib/gmp/mpn/generic/add_n.c - diff

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Diff for /OpenXM_contrib/gmp/mpn/generic/Attic/add_n.c between version 1.1.1.1 and 1.1.1.3

-version 1.1.1.1, 2000/01/10 15:35:23
+version 1.1.1.3, 2003/08/25 16:06:20
 Line 1
 Line 1
 Line 1
- /* mpn_add_n -- Add two limb vectors of equal, non-zero length.
+ /* mpn_add_n -- Add equal length limb vectors.
- Copyright (C) 1992, 1993, 1994, 1996 Free Software Foundation, Inc.
+ Copyright 1992, 1993, 1994, 1996, 2000, 2002 Free Software Foundation, Inc.
  This file is part of the GNU MP Library.
  The GNU MP 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
+ it under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2 of the License, or (at your
+ the Free Software Foundation; either version 2.1 of the License, or (at your
  option) any later version.
  The GNU MP 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
+ 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 Library General Public License
+ You should have received a copy of the GNU Lesser General Public License
  along with the GNU MP 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. */
 Line 22  MA 02111-1307, USA. */
 Line 22  MA 02111-1307, USA. */
 Line 22  MA 02111-1307, USA. */
  #include "gmp.h"
  #include "gmp-impl.h"
+ #if GMP_NAIL_BITS == 0
  mp_limb_t
- #if __STDC__
+ mpn_add_n (mp_ptr rp, mp_srcptr up, mp_srcptr vp, mp_size_t n)
- mpn_add_n (mp_ptr res_ptr, mp_srcptr s1_ptr, mp_srcptr s2_ptr, mp_size_t size)
- #else
- mpn_add_n (res_ptr, s1_ptr, s2_ptr, size)
-      register mp_ptr res_ptr;
-      register mp_srcptr s1_ptr;
-      register mp_srcptr s2_ptr;
-      mp_size_t size;
- #endif
  {
-   register mp_limb_t x, y, cy;
+   mp_limb_t ul, vl, sl, rl, cy, cy1, cy2;
-   register mp_size_t j;
-   /* The loop counter and index J goes from -SIZE to -1.  This way
+   ASSERT (n >= 1);
-      the loop becomes faster.  */
+   ASSERT (MPN_SAME_OR_SEPARATE_P (rp, up, n));
-   j = -size;
+   ASSERT (MPN_SAME_OR_SEPARATE_P (rp, vp, n));
-   /* Offset the base pointers to compensate for the negative indices.  */
+   cy = 0;
-   s1_ptr -= j;
+   do
-   s2_ptr -= j;
+     {
-   res_ptr -= j;
+       ul = *up++;
+       vl = *vp++;
+       sl = ul + vl;
+       cy1 = sl < ul;
+       rl = sl + cy;
+       cy2 = rl < sl;
+       cy = cy1 | cy2;
+       *rp++ = rl;
+     }
+   while (--n != 0);
+   return cy;
+ }
+ #endif
+ #if GMP_NAIL_BITS >= 1
+ mp_limb_t
+ mpn_add_n (mp_ptr rp, mp_srcptr up, mp_srcptr vp, mp_size_t n)
+ {
+   mp_limb_t ul, vl, rl, cy;
+   ASSERT (n >= 1);
+   ASSERT (MPN_SAME_OR_SEPARATE_P (rp, up, n));
+   ASSERT (MPN_SAME_OR_SEPARATE_P (rp, vp, n));
    cy = 0;
    do
      {
-       y = s2_ptr[j];
+       ul = *up++;
-       x = s1_ptr[j];
+       vl = *vp++;
-       y += cy;                  /* add previous carry to one addend */
+       rl = ul + vl + cy;
-       cy = (y < cy);            /* get out carry from that addition */
+       cy = rl >> GMP_NUMB_BITS;
-       y = x + y;                /* add other addend */
+       *rp++ = rl & GMP_NUMB_MASK;
-       cy = (y < x) + cy;        /* get out carry from that add, combine */
-       res_ptr[j] = y;
      }
-   while (++j != 0);
+   while (--n != 0);
    return cy;
  }
+ #endif

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