From 5c952cf0245421feb4644f2e71487c0b2e1dbd13 Mon Sep 17 00:00:00 2001 From: wdenk Date: Sun, 10 Oct 2004 21:27:30 +0000 Subject: Patches by Scott McNutt, 24 Aug 2004: - Add support for Altera Nios-II processors. - Add support for Psyent PCI-5441 board. - Add support for Psyent PK1C20 board. --- lib_nios2/mult.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 lib_nios2/mult.c (limited to 'lib_nios2/mult.c') diff --git a/lib_nios2/mult.c b/lib_nios2/mult.c new file mode 100644 index 0000000000..66bb64d0c1 --- /dev/null +++ b/lib_nios2/mult.c @@ -0,0 +1,56 @@ +/* + * This file is part of GNU CC. + * + * GNU CC 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. + * + * GNU CC 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 GNU CC; see the file COPYING. If not, write + * to the Free Software Foundation, 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + + +#include + +#if !defined(CFG_NIOS_MULT_HW) && !defined(CFG_NIOS_MULT_MSTEP) + +#include "math.h" + +USItype __mulsi3 (USItype a, USItype b) +{ + USItype c = 0; + + while (a != 0) { + if (a & 1) + c += b; + a >>= 1; + b <<= 1; + } + + return c; +} + + +UHItype __mulhi3 (UHItype a, UHItype b) +{ + UHItype c = 0; + + while (a != 0) { + if (a & 1) + c += b; + a >>= 1; + b <<= 1; + } + + return c; +} + +#endif /*!defined(CFG_NIOS_MULT_HW) && !defined(CFG_NIOS_MULT_MSTEP) */ -- cgit v1.2.1