-/* mpz_mul_ui(product, multiplier, small_multiplicand) -- Set
- PRODUCT to MULTIPLICATOR times SMALL_MULTIPLICAND.
-
-Copyright (C) 1991 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 General Public License as published by
-the Free Software Foundation; either version 2, 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 General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with the GNU MP Library; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-#include "gmp.h"
-#include "gmp-impl.h"
-#include "longlong.h"
-
-void
-#ifdef __STDC__
-mpz_mul_ui (MP_INT *prod, const MP_INT *mult,
- unsigned long int small_mult)
-#else
-mpz_mul_ui (prod, mult, small_mult)
- MP_INT *prod;
- const MP_INT *mult;
- unsigned long int small_mult;
-#endif
-{
- mp_size mult_size = mult->size;
- mp_size sign_product = mult_size;
- mp_size i;
- mp_limb cy;
- mp_size prod_size;
- mp_srcptr mult_ptr;
- mp_ptr prod_ptr;
-
- mult_size = ABS (mult_size);
-
- if (mult_size == 0 || small_mult == 0)
- {
- prod->size = 0;
- return;
- }
-
- prod_size = mult_size + 1;
- if (prod->alloc < prod_size)
- _mpz_realloc (prod, prod_size);
-
- mult_ptr = mult->d;
- prod_ptr = prod->d;
-
- cy = 0;
- for (i = 0; i < mult_size; i++)
- {
- mp_limb p1, p0;
- umul_ppmm (p1, p0, small_mult, mult_ptr[i]);
- p0 += cy;
- cy = p1 + (p0 < cy);
- prod_ptr[i] = p0;
- }
-
- prod_size = mult_size;
- if (cy != 0)
- {
- prod_ptr[mult_size] = cy;
- prod_size++;
- }
-
- prod->size = sign_product > 0 ? prod_size : -prod_size;
-}