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/*
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.
*/
//
// r_aliasa.s
// x86 assembly-language Alias model transform and project code.
//
#include "asm_i386.h"
#include "quakeasm.h"
#include "asm_draw.h"
#include "d_ifacea.h"
#if id386
.data
Ltemp0: .long 0
Ltemp1: .long 0
.text
#define pfv0 8+4
#define pfv1 8+8
#define out 8+12
.globl C(R_Alias_clip_bottom)
C(R_Alias_clip_bottom):
pushl %esi
pushl %edi
movl pfv0(%esp),%esi
movl pfv1(%esp),%edi
movl C(r_refdef)+rd_aliasvrectbottom,%eax
LDoForwardOrBackward:
movl fv_v+4(%esi),%edx
movl fv_v+4(%edi),%ecx
cmpl %ecx,%edx
jl LDoForward
movl fv_v+4(%esi),%ecx
movl fv_v+4(%edi),%edx
movl pfv0(%esp),%edi
movl pfv1(%esp),%esi
LDoForward:
subl %edx,%ecx
subl %edx,%eax
movl %ecx,Ltemp1
movl %eax,Ltemp0
fildl Ltemp1
fildl Ltemp0
movl out(%esp),%edx
movl $2,%eax
fdivp %st(0),%st(1) // scale
LDo3Forward:
fildl fv_v+0(%esi) // fv0v0 | scale
fildl fv_v+0(%edi) // fv1v0 | fv0v0 | scale
fildl fv_v+4(%esi) // fv0v1 | fv1v0 | fv0v0 | scale
fildl fv_v+4(%edi) // fv1v1 | fv0v1 | fv1v0 | fv0v0 | scale
fildl fv_v+8(%esi) // fv0v2 | fv1v1 | fv0v1 | fv1v0 | fv0v0 | scale
fildl fv_v+8(%edi) // fv1v2 | fv0v2 | fv1v1 | fv0v1 | fv1v0 | fv0v0 |
// scale
fxch %st(5) // fv0v0 | fv0v2 | fv1v1 | fv0v1 | fv1v0 | fv1v2 |
// scale
fsubr %st(0),%st(4) // fv0v0 | fv0v2 | fv1v1 | fv0v1 | fv1v0-fv0v0 |
// fv1v2 | scale
fxch %st(3) // fv0v1 | fv0v2 | fv1v1 | fv0v0 | fv1v0-fv0v0 |
// fv1v2 | scale
fsubr %st(0),%st(2) // fv0v1 | fv0v2 | fv1v1-fv0v1 | fv0v0 |
// fv1v0-fv0v0 | fv1v2 | scale
fxch %st(1) // fv0v2 | fv0v1 | fv1v1-fv0v1 | fv0v0 |
// fv1v0-fv0v0 | fv1v2 | scale
fsubr %st(0),%st(5) // fv0v2 | fv0v1 | fv1v1-fv0v1 | fv0v0 |
// fv1v0-fv0v0 | fv1v2-fv0v2 | scale
fxch %st(6) // scale | fv0v1 | fv1v1-fv0v1 | fv0v0 |
// fv1v0-fv0v0 | fv1v2-fv0v2 | fv0v2
fmul %st(0),%st(4) // scale | fv0v1 | fv1v1-fv0v1 | fv0v0 |
// (fv1v0-fv0v0)*scale | fv1v2-fv0v2 | fv0v2
addl $12,%edi
fmul %st(0),%st(2) // scale | fv0v1 | (fv1v1-fv0v1)*scale | fv0v0 |
// (fv1v0-fv0v0)*scale | fv1v2-fv0v2 | fv0v2
addl $12,%esi
addl $12,%edx
fmul %st(0),%st(5) // scale | fv0v1 | (fv1v1-fv0v1)*scale | fv0v0 |
// (fv1v0-fv0v0)*scale | (fv1v2-fv0v2)*scale |
// fv0v2
fxch %st(3) // fv0v0 | fv0v1 | (fv1v1-fv0v1)*scale | scale |
// (fv1v0-fv0v0)*scale | (fv1v2-fv0v2)*scale |
// fv0v2
faddp %st(0),%st(4) // fv0v1 | (fv1v1-fv0v1)*scale | scale |
// fv0v0+(fv1v0-fv0v0)*scale |
// (fv1v2-fv0v2)*scale | fv0v2
faddp %st(0),%st(1) // fv0v1+(fv1v1-fv0v1)*scale | scale |
// fv0v0+(fv1v0-fv0v0)*scale |
// (fv1v2-fv0v2)*scale | fv0v2
fxch %st(4) // fv0v2 | scale | fv0v0+(fv1v0-fv0v0)*scale |
// (fv1v2-fv0v2)*scale | fv0v1+(fv1v1-fv0v1)*scale
faddp %st(0),%st(3) // scale | fv0v0+(fv1v0-fv0v0)*scale |
// fv0v2+(fv1v2-fv0v2)*scale |
// fv0v1+(fv1v1-fv0v1)*scale
fxch %st(1) // fv0v0+(fv1v0-fv0v0)*scale | scale |
// fv0v2+(fv1v2-fv0v2)*scale |
// fv0v1+(fv1v1-fv0v1)*scale
fadds float_point5
fxch %st(3) // fv0v1+(fv1v1-fv0v1)*scale | scale |
// fv0v2+(fv1v2-fv0v2)*scale |
// fv0v0+(fv1v0-fv0v0)*scale
fadds float_point5
fxch %st(2) // fv0v2+(fv1v2-fv0v2)*scale | scale |
// fv0v1+(fv1v1-fv0v1)*scale |
// fv0v0+(fv1v0-fv0v0)*scale
fadds float_point5
fxch %st(3) // fv0v0+(fv1v0-fv0v0)*scale | scale |
// fv0v1+(fv1v1-fv0v1)*scale |
// fv0v2+(fv1v2-fv0v2)*scale
fistpl fv_v+0-12(%edx) // scale | fv0v1+(fv1v1-fv0v1)*scale |
// fv0v2+(fv1v2-fv0v2)*scale
fxch %st(1) // fv0v1+(fv1v1-fv0v1)*scale | scale |
// fv0v2+(fv1v2-fv0v2)*scale | scale
fistpl fv_v+4-12(%edx) // scale | fv0v2+(fv1v2-fv0v2)*scale
fxch %st(1) // fv0v2+(fv1v2-fv0v2)*sc | scale
fistpl fv_v+8-12(%edx) // scale
decl %eax
jnz LDo3Forward
fstp %st(0)
popl %edi
popl %esi
ret
.globl C(R_Alias_clip_top)
C(R_Alias_clip_top):
pushl %esi
pushl %edi
movl pfv0(%esp),%esi
movl pfv1(%esp),%edi
movl C(r_refdef)+rd_aliasvrect+4,%eax
jmp LDoForwardOrBackward
.globl C(R_Alias_clip_right)
C(R_Alias_clip_right):
pushl %esi
pushl %edi
movl pfv0(%esp),%esi
movl pfv1(%esp),%edi
movl C(r_refdef)+rd_aliasvrectright,%eax
LRightLeftEntry:
movl fv_v+4(%esi),%edx
movl fv_v+4(%edi),%ecx
cmpl %ecx,%edx
movl fv_v+0(%esi),%edx
movl fv_v+0(%edi),%ecx
jl LDoForward2
movl fv_v+0(%esi),%ecx
movl fv_v+0(%edi),%edx
movl pfv0(%esp),%edi
movl pfv1(%esp),%esi
LDoForward2:
jmp LDoForward
.globl C(R_Alias_clip_left)
C(R_Alias_clip_left):
pushl %esi
pushl %edi
movl pfv0(%esp),%esi
movl pfv1(%esp),%edi
movl C(r_refdef)+rd_aliasvrect+0,%eax
jmp LRightLeftEntry
#endif // id386
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