diff options
Diffstat (limited to 'stdlib/sub_n.c')
-rw-r--r-- | stdlib/sub_n.c | 62 |
1 files changed, 0 insertions, 62 deletions
diff --git a/stdlib/sub_n.c b/stdlib/sub_n.c deleted file mode 100644 index 987ad91..0000000 --- a/stdlib/sub_n.c +++ /dev/null @@ -1,62 +0,0 @@ -/* mpn_sub_n -- Subtract two limb vectors of equal, non-zero length. - -Copyright (C) 1992, 1993, 1994, 1996 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 Lesser General Public License as published by -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 Lesser General Public -License for more details. - -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. */ - -#include <gmp.h> -#include "gmp-impl.h" - -mp_limb_t -#if __STDC__ -mpn_sub_n (mp_ptr res_ptr, mp_srcptr s1_ptr, mp_srcptr s2_ptr, mp_size_t size) -#else -mpn_sub_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; - register mp_size_t j; - - /* The loop counter and index J goes from -SIZE to -1. This way - the loop becomes faster. */ - j = -size; - - /* Offset the base pointers to compensate for the negative indices. */ - s1_ptr -= j; - s2_ptr -= j; - res_ptr -= j; - - cy = 0; - do - { - y = s2_ptr[j]; - x = s1_ptr[j]; - y += cy; /* add previous carry to subtrahend */ - cy = (y < cy); /* get out carry from that addition */ - y = x - y; /* main subtract */ - cy = (y > x) + cy; /* get out carry from the subtract, combine */ - res_ptr[j] = y; - } - while (++j != 0); - - return cy; -} |