mirror of
https://github.com/rn10950/RetroZilla.git
synced 2024-11-09 09:20:15 +01:00
116 lines
3.9 KiB
C
116 lines
3.9 KiB
C
/* ***** 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);
|
|
}
|
|
|