2005-08-26 17:39:27 +00:00
|
|
|
/*
|
|
|
|
|
===========================================================================
|
|
|
|
|
Copyright (C) 1999-2005 Id Software, Inc.
|
|
|
|
|
|
|
|
|
|
This file is part of Quake III Arena source code.
|
|
|
|
|
|
|
|
|
|
Quake III Arena source code 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.
|
|
|
|
|
|
|
|
|
|
Quake III Arena source code 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 Foobar; if not, write to the Free Software
|
|
|
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
|
===========================================================================
|
|
|
|
|
*/
|
|
|
|
|
//
|
|
|
|
|
// math.s
|
|
|
|
|
// x86 assembly-language math routines.
|
|
|
|
|
|
|
|
|
|
#include "qasm.h"
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
#if id386
|
|
|
|
|
|
|
|
|
|
.text
|
|
|
|
|
|
|
|
|
|
// TODO: rounding needed?
|
|
|
|
|
// stack parameter offset
|
|
|
|
|
#define val 4
|
|
|
|
|
|
|
|
|
|
.globl C(Invert24To16)
|
|
|
|
|
C(Invert24To16):
|
|
|
|
|
|
|
|
|
|
movl val(%esp),%ecx
|
|
|
|
|
movl $0x100,%edx // 0x10000000000 as dividend
|
|
|
|
|
cmpl %edx,%ecx
|
|
|
|
|
jle LOutOfRange
|
|
|
|
|
|
|
|
|
|
subl %eax,%eax
|
|
|
|
|
divl %ecx
|
|
|
|
|
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
LOutOfRange:
|
|
|
|
|
movl $0xFFFFFFFF,%eax
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
#endif // id386
|
