gpsp/bios/source/helper.arm.c

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/*
Custom GBA BIOS replacement
Copyright (c) 2002-2006 VBA Development Team
Copyright (c) 2006-2013 VBA-M Development Team
Copyright (c) 2013 Normmatt
This program 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
of the License, or (at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <tonc.h>
u32 umul3232H32(u32 val, u32 val2)
{
register u32 a __asm ("r2");
register u32 b __asm ("r3");
__asm ("umull %0, %1, %2, %3" :
"=r"(a), "=r"(b) :
"r"(val), "r"(val2)
);
return b;
}