mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-13 18:34:45 +00:00
43 lines
1.2 KiB
C
43 lines
1.2 KiB
C
|
/* Copyright (C) 2012-2014 Free Software Foundation, Inc.
|
||
|
|
Contributed by Altera and Mentor Graphics, Inc.
|
||
|
|
|
||
|
|
This file 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 3, or (at your option) any
|
||
|
|
later version.
|
||
|
|
|
||
|
|
This file 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.
|
||
|
|
|
||
|
|
Under Section 7 of GPL version 3, you are granted additional
|
||
|
|
permissions described in the GCC Runtime Library Exception, version
|
||
|
|
3.1, as published by the Free Software Foundation.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU General Public License and
|
||
|
|
a copy of the GCC Runtime Library Exception along with this program;
|
||
|
|
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
||
|
|
<http://www.gnu.org/licenses/>. */
|
||
|
|
|
||
|
|
#include "lib2-nios2.h"
|
||
|
|
|
||
|
|
/* 32-bit SI multiply for Nios II. */
|
||
|
|
|
||
|
|
SItype
|
||
|
|
__mulsi3 (SItype a, SItype b)
|
||
|
|
{
|
||
|
|
SItype res = 0;
|
||
|
|
USItype cnt = a;
|
||
|
|
|
||
|
|
while (cnt)
|
||
|
|
{
|
||
|
|
if (cnt & 1)
|
||
|
|
res += b;
|
||
|
|
b <<= 1;
|
||
|
|
cnt >>= 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
return res;
|
||
|
|
}
|