mirror of
https://git.code.sf.net/p/quake/quakeforge-old
synced 2024-11-10 14:42:06 +00:00
150 lines
3 KiB
ArmAsm
150 lines
3 KiB
ArmAsm
/*
|
|
worlda.s
|
|
|
|
x86 assembly-language server testing stuff
|
|
|
|
Copyright (C) 1996-1997 Id Software, Inc.
|
|
Copyright (C) 1999,2000 contributors of the QuakeForge project
|
|
Please see the file "AUTHORS" for a list of contributors
|
|
|
|
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:
|
|
|
|
Free Software Foundation, Inc.
|
|
59 Temple Place - Suite 330
|
|
Boston, MA 02111-1307, USA
|
|
|
|
$Id$
|
|
*/
|
|
|
|
#define GLQUAKE 1 // don't include unneeded defs
|
|
#include <asm_i386.h>
|
|
#include <quakeasm.h>
|
|
#include <d_ifacea.h>
|
|
|
|
#if id386
|
|
|
|
.data
|
|
|
|
Ltemp: .long 0
|
|
|
|
.text
|
|
|
|
//----------------------------------------------------------------------
|
|
// hull-point test
|
|
//----------------------------------------------------------------------
|
|
|
|
#define hull 4+8 // because only partially pushed
|
|
#define num 8+4 // because only partially pushed
|
|
#define p 12+12 // because only partially pushed
|
|
|
|
.align 4
|
|
.globl C(SV_HullPointContents)
|
|
C(SV_HullPointContents):
|
|
pushl %edi // preserve register variables
|
|
movl num(%esp),%eax
|
|
testl %eax,%eax
|
|
js Lhquickout
|
|
|
|
// float d;
|
|
// dclipnode_t *node;
|
|
// mplane_t *plane;
|
|
|
|
pushl %ebx
|
|
movl hull(%esp),%ebx
|
|
|
|
pushl %ebp
|
|
movl p(%esp),%edx
|
|
|
|
movl hu_clipnodes(%ebx),%edi
|
|
movl hu_planes(%ebx),%ebp
|
|
|
|
subl %ebx,%ebx
|
|
pushl %esi
|
|
|
|
// %ebx: 0
|
|
// %eax: num
|
|
// %edx: p
|
|
// %edi: hull->clipnodes
|
|
// %ebp: hull->planes
|
|
|
|
// while (num >= 0)
|
|
// {
|
|
|
|
Lhloop:
|
|
|
|
// node = hull->clipnodes + num;
|
|
// plane = hull->planes + node->planenum;
|
|
// !!! if the size of dclipnode_t changes, the scaling of %eax needs to be
|
|
// changed !!!
|
|
movl nd_planenum(%edi,%eax,8),%ecx
|
|
movl nd_children(%edi,%eax,8),%eax
|
|
movl %eax,%esi
|
|
rorl $16,%eax
|
|
leal (%ecx,%ecx,4),%ecx
|
|
|
|
// if (plane->type < 3)
|
|
// d = p[plane->type] - plane->dist;
|
|
movb pl_type(%ebp,%ecx,4),%bl
|
|
cmpb $3,%bl
|
|
jb Lnodot
|
|
|
|
// else
|
|
// d = DotProduct (plane->normal, p) - plane->dist;
|
|
flds pl_normal(%ebp,%ecx,4)
|
|
fmuls 0(%edx)
|
|
flds pl_normal+4(%ebp,%ecx,4)
|
|
fmuls 4(%edx)
|
|
flds pl_normal+8(%ebp,%ecx,4)
|
|
fmuls 8(%edx)
|
|
fxch %st(1)
|
|
faddp %st(0),%st(2)
|
|
faddp %st(0),%st(1)
|
|
fsubs pl_dist(%ebp,%ecx,4)
|
|
jmp Lsub
|
|
|
|
Lnodot:
|
|
flds pl_dist(%ebp,%ecx,4)
|
|
fsubrs (%edx,%ebx,4)
|
|
|
|
Lsub:
|
|
sarl $16,%eax
|
|
sarl $16,%esi
|
|
|
|
// if (d < 0)
|
|
// num = node->children[1];
|
|
// else
|
|
// num = node->children[0];
|
|
fstps Ltemp
|
|
movl Ltemp,%ecx
|
|
sarl $31,%ecx
|
|
andl %ecx,%esi
|
|
xorl $0xFFFFFFFF,%ecx
|
|
andl %ecx,%eax
|
|
orl %esi,%eax
|
|
jns Lhloop
|
|
|
|
// return num;
|
|
Lhdone:
|
|
popl %esi
|
|
popl %ebp
|
|
popl %ebx // restore register variables
|
|
|
|
Lhquickout:
|
|
popl %edi
|
|
|
|
ret
|
|
|
|
#endif // id386
|
|
|