mirror of
https://git.code.sf.net/p/quake/newtree
synced 2024-11-22 20:21:38 +00:00
102 lines
2.7 KiB
ArmAsm
102 lines
2.7 KiB
ArmAsm
/*
|
|
Copyright (C) 1996-1997 Id Software, Inc.
|
|
|
|
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
|
*/
|
|
//
|
|
// math.s
|
|
// x86 assembly-language math routines.
|
|
|
|
#include "asm_i386.h"
|
|
#include "quakeasm.h"
|
|
|
|
|
|
#if id386
|
|
|
|
.data
|
|
|
|
.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
|
|
|
|
#define in 4
|
|
#define out 8
|
|
|
|
.align 2
|
|
.globl C(TransformVector)
|
|
C(TransformVector):
|
|
movl in(%esp),%eax
|
|
movl out(%esp),%edx
|
|
|
|
flds (%eax) // in[0]
|
|
fmuls C(vright) // in[0]*vright[0]
|
|
flds (%eax) // in[0] | in[0]*vright[0]
|
|
fmuls C(vup) // in[0]*vup[0] | in[0]*vright[0]
|
|
flds (%eax) // in[0] | in[0]*vup[0] | in[0]*vright[0]
|
|
fmuls C(vpn) // in[0]*vpn[0] | in[0]*vup[0] | in[0]*vright[0]
|
|
|
|
flds 4(%eax) // in[1] | ...
|
|
fmuls C(vright)+4 // in[1]*vright[1] | ...
|
|
flds 4(%eax) // in[1] | in[1]*vright[1] | ...
|
|
fmuls C(vup)+4 // in[1]*vup[1] | in[1]*vright[1] | ...
|
|
flds 4(%eax) // in[1] | in[1]*vup[1] | in[1]*vright[1] | ...
|
|
fmuls C(vpn)+4 // in[1]*vpn[1] | in[1]*vup[1] | in[1]*vright[1] | ...
|
|
fxch %st(2) // in[1]*vright[1] | in[1]*vup[1] | in[1]*vpn[1] | ...
|
|
|
|
faddp %st(0),%st(5) // in[1]*vup[1] | in[1]*vpn[1] | ...
|
|
faddp %st(0),%st(3) // in[1]*vpn[1] | ...
|
|
faddp %st(0),%st(1) // vpn_accum | vup_accum | vright_accum
|
|
|
|
flds 8(%eax) // in[2] | ...
|
|
fmuls C(vright)+8 // in[2]*vright[2] | ...
|
|
flds 8(%eax) // in[2] | in[2]*vright[2] | ...
|
|
fmuls C(vup)+8 // in[2]*vup[2] | in[2]*vright[2] | ...
|
|
flds 8(%eax) // in[2] | in[2]*vup[2] | in[2]*vright[2] | ...
|
|
fmuls C(vpn)+8 // in[2]*vpn[2] | in[2]*vup[2] | in[2]*vright[2] | ...
|
|
fxch %st(2) // in[2]*vright[2] | in[2]*vup[2] | in[2]*vpn[2] | ...
|
|
|
|
faddp %st(0),%st(5) // in[2]*vup[2] | in[2]*vpn[2] | ...
|
|
faddp %st(0),%st(3) // in[2]*vpn[2] | ...
|
|
faddp %st(0),%st(1) // vpn_accum | vup_accum | vright_accum
|
|
|
|
fstps 8(%edx) // out[2]
|
|
fstps 4(%edx) // out[1]
|
|
fstps (%edx) // out[0]
|
|
|
|
ret
|
|
|
|
|
|
#endif // id386
|