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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Netscape security libraries.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/* $Id: mpi_hp.c,v 1.5 2004/04/27 23:04:36 gerv%gerv.net Exp $ */
/* This file contains routines that perform vector multiplication. */
#include "mpi-priv.h"
#include <unistd.h>
#include <stddef.h>
/* #include <sys/systeminfo.h> */
#include <strings.h>
extern void multacc512(
int length, /* doublewords in multiplicand vector. */
const mp_digit *scalaraddr, /* Address of scalar. */
const mp_digit *multiplicand, /* The multiplicand vector. */
mp_digit * result); /* Where to accumulate the result. */
extern void maxpy_little(
int length, /* doublewords in multiplicand vector. */
const mp_digit *scalaraddr, /* Address of scalar. */
const mp_digit *multiplicand, /* The multiplicand vector. */
mp_digit * result); /* Where to accumulate the result. */
extern void add_diag_little(
int length, /* doublewords in input vector. */
const mp_digit *root, /* The vector to square. */
mp_digit * result); /* Where to accumulate the result. */
void
s_mpv_sqr_add_prop(const mp_digit *pa, mp_size a_len, mp_digit *ps)
{
add_diag_little(a_len, pa, ps);
}
#define MAX_STACK_DIGITS 258
#define MULTACC512_LEN (512 / MP_DIGIT_BIT)
#define HP_MPY_ADD_FN (a_len == MULTACC512_LEN ? multacc512 : maxpy_little)
/* c = a * b */
void
s_mpv_mul_d(const mp_digit *a, mp_size a_len, mp_digit b, mp_digit *c)
{
mp_digit x[MAX_STACK_DIGITS];
mp_digit *px = x;
size_t xSize = 0;
if (a == c) {
if (a_len > MAX_STACK_DIGITS) {
xSize = sizeof(mp_digit) * (a_len + 2);
px = malloc(xSize);
if (!px)
return;
}
memcpy(px, a, a_len * sizeof(*a));
a = px;
}
s_mp_setz(c, a_len + 1);
HP_MPY_ADD_FN(a_len, &b, a, c);
if (px != x && px) {
memset(px, 0, xSize);
free(px);
}
}
/* c += a * b, where a is a_len words long. */
void
s_mpv_mul_d_add(const mp_digit *a, mp_size a_len, mp_digit b, mp_digit *c)
{
c[a_len] = 0; /* so carry propagation stops here. */
HP_MPY_ADD_FN(a_len, &b, a, c);
}
/* c += a * b, where a is y words long. */
void
s_mpv_mul_d_add_prop(const mp_digit *a, mp_size a_len, mp_digit b,
mp_digit *c)
{
HP_MPY_ADD_FN(a_len, &b, a, c);
}
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