mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-11 07:42:18 +00:00
3103f400fd
r_refdef is really meant for holding the various screen "constants" for the software renderer rather than the more generic scene stuff. All the fields referenced by the low level rendering code (especially assembly) have been moved to the beginning of the struct (and nicely fit within 64 bytes). The other fields should be moved elsewhere, but not this commit. On top of that, R_ViewChanged is much easier to read, and there are fewer static globals.
327 lines
7.3 KiB
ArmAsm
327 lines
7.3 KiB
ArmAsm
/*
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r_aclipa.S
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x86 assembly-language clip routines for drawing Alias models directly
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to the screen
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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$Id$
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include "asm_i386.h"
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#include "quakeasm.h"
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#include "asm_draw.h"
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#include "d_ifacea.h"
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#ifdef PIC
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# undef USE_INTEL_ASM //XXX asm pic hack
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#endif
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#ifdef USE_INTEL_ASM
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#ifdef _WIN32
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# undef PIC
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#endif
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.text
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#define temp0 0
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#define temp1 4
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#define point5 8
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#define pfv0 12+8+4
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#define pfv1 12+8+8
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#define out 12+8+12
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.globl C(R_Alias_clip_bottom)
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#ifdef PIC
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.type R_Alias_clip_bottom,@function
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#endif
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C(R_Alias_clip_bottom):
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pushl %esi
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pushl %edi
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subl $12,%esp
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movl pfv0(%esp),%esi
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movl pfv1(%esp),%edi
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#ifdef PIC
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call .Lpic1
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.Lpic1:
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popl %eax
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addl $C(_GLOBAL_OFFSET_TABLE_)-1+[.-.Lpic1],%eax
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movl C(float_point5)@GOTOFF(%eax),%edx
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movl C(r_refdef)@GOT(%eax),%eax
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#else
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leal C(r_refdef),%eax
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movl C(float_point5),%edx
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#endif
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movl rd_aliasvrectbottom(%eax),%eax
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movl %edx,point5(%esp)
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LDoForwardOrBackward:
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movl fv_v+4(%esi),%edx
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movl fv_v+4(%edi),%ecx
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cmpl %ecx,%edx
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jl LDoForward
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movl fv_v+4(%esi),%ecx
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movl fv_v+4(%edi),%edx
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movl pfv0(%esp),%edi
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movl pfv1(%esp),%esi
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LDoForward:
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subl %edx,%ecx
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subl %edx,%eax
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movl %ecx,temp1(%esp)
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movl %eax,temp0(%esp)
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fildl temp1(%esp)
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fildl temp0(%esp)
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movl out(%esp),%edx
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movl $2,%eax
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fdivp %st(0),%st(1) // scale
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LDo3Forward:
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fildl fv_v+0(%esi) // fv0v0 | scale
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fildl fv_v+0(%edi) // fv1v0 | fv0v0 | scale
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fildl fv_v+4(%esi) // fv0v1 | fv1v0 | fv0v0 | scale
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fildl fv_v+4(%edi) // fv1v1 | fv0v1 | fv1v0 | fv0v0 | scale
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fildl fv_v+8(%esi) // fv0v2 | fv1v1 | fv0v1 | fv1v0 | fv0v0 | scale
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fildl fv_v+8(%edi) // fv1v2 | fv0v2 | fv1v1 | fv0v1 | fv1v0 | fv0v0 |
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// scale
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fxch %st(5) // fv0v0 | fv0v2 | fv1v1 | fv0v1 | fv1v0 | fv1v2 |
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// scale
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fsubr %st(0),%st(4) // fv0v0 | fv0v2 | fv1v1 | fv0v1 | fv1v0-fv0v0 |
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// fv1v2 | scale
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fxch %st(3) // fv0v1 | fv0v2 | fv1v1 | fv0v0 | fv1v0-fv0v0 |
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// fv1v2 | scale
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fsubr %st(0),%st(2) // fv0v1 | fv0v2 | fv1v1-fv0v1 | fv0v0 |
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// fv1v0-fv0v0 | fv1v2 | scale
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fxch %st(1) // fv0v2 | fv0v1 | fv1v1-fv0v1 | fv0v0 |
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// fv1v0-fv0v0 | fv1v2 | scale
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fsubr %st(0),%st(5) // fv0v2 | fv0v1 | fv1v1-fv0v1 | fv0v0 |
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// fv1v0-fv0v0 | fv1v2-fv0v2 | scale
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fxch %st(6) // scale | fv0v1 | fv1v1-fv0v1 | fv0v0 |
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// fv1v0-fv0v0 | fv1v2-fv0v2 | fv0v2
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fmul %st(0),%st(4) // scale | fv0v1 | fv1v1-fv0v1 | fv0v0 |
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// (fv1v0-fv0v0)*scale | fv1v2-fv0v2 | fv0v2
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addl $12,%edi
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fmul %st(0),%st(2) // scale | fv0v1 | (fv1v1-fv0v1)*scale | fv0v0 |
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// (fv1v0-fv0v0)*scale | fv1v2-fv0v2 | fv0v2
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addl $12,%esi
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addl $12,%edx
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fmul %st(0),%st(5) // scale | fv0v1 | (fv1v1-fv0v1)*scale | fv0v0 |
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// (fv1v0-fv0v0)*scale | (fv1v2-fv0v2)*scale |
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// fv0v2
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fxch %st(3) // fv0v0 | fv0v1 | (fv1v1-fv0v1)*scale | scale |
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// (fv1v0-fv0v0)*scale | (fv1v2-fv0v2)*scale |
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// fv0v2
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faddp %st(0),%st(4) // fv0v1 | (fv1v1-fv0v1)*scale | scale |
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// fv0v0+(fv1v0-fv0v0)*scale |
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// (fv1v2-fv0v2)*scale | fv0v2
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faddp %st(0),%st(1) // fv0v1+(fv1v1-fv0v1)*scale | scale |
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// fv0v0+(fv1v0-fv0v0)*scale |
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// (fv1v2-fv0v2)*scale | fv0v2
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fxch %st(4) // fv0v2 | scale | fv0v0+(fv1v0-fv0v0)*scale |
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// (fv1v2-fv0v2)*scale | fv0v1+(fv1v1-fv0v1)*scale
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faddp %st(0),%st(3) // scale | fv0v0+(fv1v0-fv0v0)*scale |
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// fv0v2+(fv1v2-fv0v2)*scale |
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// fv0v1+(fv1v1-fv0v1)*scale
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fxch %st(1) // fv0v0+(fv1v0-fv0v0)*scale | scale |
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// fv0v2+(fv1v2-fv0v2)*scale |
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// fv0v1+(fv1v1-fv0v1)*scale
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fadds point5(%esp)
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fxch %st(3) // fv0v1+(fv1v1-fv0v1)*scale | scale |
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// fv0v2+(fv1v2-fv0v2)*scale |
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// fv0v0+(fv1v0-fv0v0)*scale
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fadds point5(%esp)
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fxch %st(2) // fv0v2+(fv1v2-fv0v2)*scale | scale |
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// fv0v1+(fv1v1-fv0v1)*scale |
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// fv0v0+(fv1v0-fv0v0)*scale
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fadds point5(%esp)
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fxch %st(3) // fv0v0+(fv1v0-fv0v0)*scale | scale |
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// fv0v1+(fv1v1-fv0v1)*scale |
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// fv0v2+(fv1v2-fv0v2)*scale
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fistpl fv_v+0-12(%edx) // scale | fv0v1+(fv1v1-fv0v1)*scale |
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// fv0v2+(fv1v2-fv0v2)*scale
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fxch %st(1) // fv0v1+(fv1v1-fv0v1)*scale | scale |
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// fv0v2+(fv1v2-fv0v2)*scale | scale
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fistpl fv_v+4-12(%edx) // scale | fv0v2+(fv1v2-fv0v2)*scale
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fxch %st(1) // fv0v2+(fv1v2-fv0v2)*sc | scale
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fistpl fv_v+8-12(%edx) // scale
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decl %eax
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jnz LDo3Forward
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fstp %st(0)
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addl $12,%esp
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popl %edi
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popl %esi
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ret
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#ifdef PIC
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.Lsize1:
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.size C(R_Alias_clip_bottom),.Lsize1-C(R_Alias_clip_bottom)
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#endif
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.align 4
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.globl C(R_Alias_clip_top)
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#ifdef PIC
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.type R_Alias_clip_top,@function
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#endif
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C(R_Alias_clip_top):
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pushl %esi
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pushl %edi
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subl $12,%esp
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movl pfv0(%esp),%esi
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movl pfv1(%esp),%edi
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#ifdef PIC
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call .Lpic2
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.Lpic2:
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popl %eax
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addl $C(_GLOBAL_OFFSET_TABLE_)-1+[.-.Lpic2],%eax
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movl C(float_point5)@GOTOFF(%eax),%edx
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movl C(r_refdef)@GOT(%eax),%eax
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#else
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leal C(r_refdef),%eax
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movl C(float_point5),%edx
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#endif
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movl rd_aliasvrecttop(%eax),%eax
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movl %edx,point5(%esp)
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jmp LDoForwardOrBackward
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#ifdef PIC
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.Lsize2:
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.size C(R_Alias_clip_top),.Lsize2-C(R_Alias_clip_top)
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#endif
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.align 4
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.globl C(R_Alias_clip_right)
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#ifdef PIC
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.type R_Alias_clip_right,@function
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#endif
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C(R_Alias_clip_right):
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pushl %esi
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pushl %edi
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subl $12,%esp
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movl pfv0(%esp),%esi
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movl pfv1(%esp),%edi
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#ifdef PIC
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call .Lpic3
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.Lpic3:
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popl %eax
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addl $C(_GLOBAL_OFFSET_TABLE_)-1+[.-.Lpic3],%eax
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movl C(float_point5)@GOTOFF(%eax),%edx
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movl C(r_refdef)@GOT(%eax),%eax
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#else
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leal C(r_refdef),%eax
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movl C(float_point5),%edx
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#endif
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movl rd_aliasvrectright(%eax),%eax
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movl %edx,point5(%esp)
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LRightLeftEntry:
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movl fv_v+4(%esi),%edx
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movl fv_v+4(%edi),%ecx
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cmpl %ecx,%edx
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movl fv_v+0(%esi),%edx
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movl fv_v+0(%edi),%ecx
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jl LDoForward2
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movl fv_v+0(%esi),%ecx
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movl fv_v+0(%edi),%edx
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movl pfv0(%esp),%edi
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movl pfv1(%esp),%esi
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LDoForward2:
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jmp LDoForward
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#ifdef PIC
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.Lsize3:
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.size C(R_Alias_clip_right),.Lsize3-C(R_Alias_clip_right)
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#endif
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.align 4
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.globl C(R_Alias_clip_left)
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#ifdef PIC
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.type R_Alias_clip_left,@function
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#endif
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C(R_Alias_clip_left):
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pushl %esi
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pushl %edi
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subl $12,%esp
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movl pfv0(%esp),%esi
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movl pfv1(%esp),%edi
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#ifdef PIC
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call .Lpic4
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.Lpic4:
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popl %eax
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addl $C(_GLOBAL_OFFSET_TABLE_)-1+[.-.Lpic4],%eax
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movl C(float_point5)@GOTOFF(%eax),%edx
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movl C(r_refdef)@GOT(%eax),%eax
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#else
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leal C(r_refdef),%eax
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movl C(float_point5),%edx
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#endif
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movl rd_aliasvrectleft(%eax),%eax
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movl %edx,point5(%esp)
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jmp LRightLeftEntry
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#ifdef PIC
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.Lsize4:
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.size C(R_Alias_clip_left),.Lsize4-C(R_Alias_clip_left)
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#endif
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.align 4
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#endif // USE_INTEL_ASM
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#if defined(__linux__) && defined(__ELF__)
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.section .note.GNU-stack,"",%progbits
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#endif
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