mirror of
https://git.code.sf.net/p/quake/quakeforge-old
synced 2024-11-22 11:51:17 +00:00
174 lines
3.4 KiB
ArmAsm
174 lines
3.4 KiB
ArmAsm
/*
|
|
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 the Free Software
|
|
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
|
*/
|
|
//
|
|
// surf16.s
|
|
// x86 assembly-language 16 bpp surface block drawing code.
|
|
//
|
|
|
|
#include "asm_i386.h"
|
|
#include "quakeasm.h"
|
|
#include "asm_draw.h"
|
|
|
|
#if id386
|
|
|
|
//----------------------------------------------------------------------
|
|
// Surface block drawer
|
|
//----------------------------------------------------------------------
|
|
|
|
.data
|
|
|
|
k: .long 0
|
|
loopentry: .long 0
|
|
|
|
.align 4
|
|
blockjumptable16:
|
|
.long LEnter2_16
|
|
.long LEnter4_16
|
|
.long 0, LEnter8_16
|
|
.long 0, 0, 0, LEnter16_16
|
|
|
|
|
|
.text
|
|
|
|
.align 4
|
|
.globl C(R_Surf16Start)
|
|
C(R_Surf16Start):
|
|
|
|
.align 4
|
|
.globl C(R_DrawSurfaceBlock16)
|
|
C(R_DrawSurfaceBlock16):
|
|
pushl %ebp // preserve caller's stack frame
|
|
pushl %edi
|
|
pushl %esi // preserve register variables
|
|
pushl %ebx
|
|
|
|
movl C(blocksize),%eax
|
|
movl C(prowdestbase),%edi
|
|
movl C(pbasesource),%esi
|
|
movl C(sourcesstep),%ebx
|
|
movl blockjumptable16-4(,%eax,2),%ecx
|
|
movl %eax,k
|
|
movl %ecx,loopentry
|
|
movl C(lightleft),%edx
|
|
movl C(lightright),%ebp
|
|
|
|
Lblockloop16:
|
|
|
|
subl %edx,%ebp
|
|
movb C(blockdivshift),%cl
|
|
sarl %cl,%ebp
|
|
jns Lp1_16
|
|
testl C(blockdivmask),%ebp
|
|
jz Lp1_16
|
|
incl %ebp
|
|
Lp1_16:
|
|
|
|
subl %eax,%eax
|
|
subl %ecx,%ecx // high words must be 0 in loop for addressing
|
|
|
|
jmp *loopentry
|
|
|
|
.align 4
|
|
|
|
#include "block16.h"
|
|
|
|
movl C(pbasesource),%esi
|
|
movl C(lightleft),%edx
|
|
movl C(lightright),%ebp
|
|
movl C(sourcetstep),%eax
|
|
movl C(lightrightstep),%ecx
|
|
movl C(prowdestbase),%edi
|
|
|
|
addl %eax,%esi
|
|
addl %ecx,%ebp
|
|
|
|
movl C(lightleftstep),%eax
|
|
movl C(surfrowbytes),%ecx
|
|
|
|
addl %eax,%edx
|
|
addl %ecx,%edi
|
|
|
|
movl %esi,C(pbasesource)
|
|
movl %ebp,C(lightright)
|
|
movl k,%eax
|
|
movl %edx,C(lightleft)
|
|
decl %eax
|
|
movl %edi,C(prowdestbase)
|
|
movl %eax,k
|
|
jnz Lblockloop16
|
|
|
|
popl %ebx // restore register variables
|
|
popl %esi
|
|
popl %edi
|
|
popl %ebp // restore the caller's stack frame
|
|
ret
|
|
|
|
.globl C(R_Surf16End)
|
|
C(R_Surf16End):
|
|
|
|
//----------------------------------------------------------------------
|
|
// Code patching routines
|
|
//----------------------------------------------------------------------
|
|
.data
|
|
|
|
.align 4
|
|
LPatchTable16:
|
|
.long LBPatch0-4
|
|
.long LBPatch1-4
|
|
.long LBPatch2-4
|
|
.long LBPatch3-4
|
|
.long LBPatch4-4
|
|
.long LBPatch5-4
|
|
.long LBPatch6-4
|
|
.long LBPatch7-4
|
|
.long LBPatch8-4
|
|
.long LBPatch9-4
|
|
.long LBPatch10-4
|
|
.long LBPatch11-4
|
|
.long LBPatch12-4
|
|
.long LBPatch13-4
|
|
.long LBPatch14-4
|
|
.long LBPatch15-4
|
|
|
|
.text
|
|
|
|
.align 4
|
|
.globl C(R_Surf16Patch)
|
|
C(R_Surf16Patch):
|
|
pushl %ebx
|
|
|
|
movl C(colormap),%eax
|
|
movl $LPatchTable16,%ebx
|
|
movl $16,%ecx
|
|
LPatchLoop16:
|
|
movl (%ebx),%edx
|
|
addl $4,%ebx
|
|
movl %eax,(%edx)
|
|
decl %ecx
|
|
jnz LPatchLoop16
|
|
|
|
popl %ebx
|
|
|
|
ret
|
|
|
|
|
|
#endif // id386
|