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author | wdenk <wdenk> | 2004-10-10 21:27:30 (GMT) |
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committer | wdenk <wdenk> | 2004-10-10 21:27:30 (GMT) |
commit | 5c952cf0245421feb4644f2e71487c0b2e1dbd13 (patch) | |
tree | 47b80e839d339fe11dabd01ec8c89b46b791f797 /lib_nios2/mult.c | |
parent | 03f5c55021c2d6297e66cc11bfea75f149a5d71c (diff) | |
download | u-boot-5c952cf0245421feb4644f2e71487c0b2e1dbd13.tar.xz |
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.
Diffstat (limited to 'lib_nios2/mult.c')
-rw-r--r-- | lib_nios2/mult.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/lib_nios2/mult.c b/lib_nios2/mult.c new file mode 100644 index 0000000..66bb64d --- /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 <common.h> + +#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) */ |