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annotate libquadmath/printf/mul_1.c @ 68:561a7518be6b

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update gcc-4.6
author Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
date Sun, 21 Aug 2011 07:07:55 +0900
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children
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68
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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1 /* mpn_mul_1 -- Multiply a limb vector with a single limb and
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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2 store the product in a second limb vector.
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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3
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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4 Copyright (C) 1991, 1992, 1993, 1994, 1996 Free Software Foundation, Inc.
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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5
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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6 This file is part of the GNU MP Library.
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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7
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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8 The GNU MP Library is free software; you can redistribute it and/or modify
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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9 it under the terms of the GNU Lesser General Public License as published by
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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10 the Free Software Foundation; either version 2.1 of the License, or (at your
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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11 option) any later version.
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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12
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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13 The GNU MP Library is distributed in the hope that it will be useful, but
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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14 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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16 License for more details.
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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17
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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18 You should have received a copy of the GNU Lesser General Public License
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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19 along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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21 MA 02111-1307, USA. */
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22
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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23 #include <config.h>
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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24 #include "gmp-impl.h"
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25
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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26 mp_limb_t
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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27 mpn_mul_1 (res_ptr, s1_ptr, s1_size, s2_limb)
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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28 register mp_ptr res_ptr;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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29 register mp_srcptr s1_ptr;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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30 mp_size_t s1_size;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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31 register mp_limb_t s2_limb;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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32 {
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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33 register mp_limb_t cy_limb;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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34 register mp_size_t j;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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35 register mp_limb_t prod_high, prod_low;
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36
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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37 /* The loop counter and index J goes from -S1_SIZE to -1. This way
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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38 the loop becomes faster. */
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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39 j = -s1_size;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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40
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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41 /* Offset the base pointers to compensate for the negative indices. */
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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42 s1_ptr -= j;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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43 res_ptr -= j;
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44
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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45 cy_limb = 0;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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46 do
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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47 {
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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48 umul_ppmm (prod_high, prod_low, s1_ptr[j], s2_limb);
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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49
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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50 prod_low += cy_limb;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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51 cy_limb = (prod_low < cy_limb) + prod_high;
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52
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53 res_ptr[j] = prod_low;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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54 }
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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55 while (++j != 0);
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56
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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57 return cy_limb;
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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58 }