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Diffstat (limited to 'stdlib/submul_1.c')
-rw-r--r-- | stdlib/submul_1.c | 65 |
1 files changed, 0 insertions, 65 deletions
diff --git a/stdlib/submul_1.c b/stdlib/submul_1.c deleted file mode 100644 index 3e7163a2a3..0000000000 --- a/stdlib/submul_1.c +++ /dev/null @@ -1,65 +0,0 @@ -/* mpn_submul_1 -- multiply the S1_SIZE long limb vector pointed to by S1_PTR - by S2_LIMB, subtract the S1_SIZE least significant limbs of the product - from the limb vector pointed to by RES_PTR. Return the most significant - limb of the product, adjusted for carry-out from the subtraction. - -Copyright (C) 1992, 1993, 1994, 1996, 2005 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" -#include "longlong.h" - -mp_limb_t -mpn_submul_1 (res_ptr, s1_ptr, s1_size, s2_limb) - register mp_ptr res_ptr; - register mp_srcptr s1_ptr; - mp_size_t s1_size; - register mp_limb_t s2_limb; -{ - register mp_limb_t cy_limb; - register mp_size_t j; - register mp_limb_t prod_high, prod_low; - register mp_limb_t x; - - /* The loop counter and index J goes from -SIZE to -1. This way - the loop becomes faster. */ - j = -s1_size; - - /* Offset the base pointers to compensate for the negative indices. */ - res_ptr -= j; - s1_ptr -= j; - - cy_limb = 0; - do - { - umul_ppmm (prod_high, prod_low, s1_ptr[j], s2_limb); - - prod_low += cy_limb; - cy_limb = (prod_low < cy_limb) + prod_high; - - x = res_ptr[j]; - prod_low = x - prod_low; - cy_limb += (prod_low > x); - res_ptr[j] = prod_low; - } - while (++j != 0); - - return cy_limb; -} |