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quakeforge-old/common/d_polysa.s

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Created new subdir: uquake. Pick your favorite U word for the meaning -- Unchained, Ultimate, Ultra, Up Yours, Underworld, Underground, Unified, Unity, etc. You know the drill. This takes care of the "standalone" problem with the wrong name, and the recent snafu with multiple developers working on the same files simultaneously...expect me (and probably others) to start locking dirs when updates are taking place. And yes, this update is really as large as it looks. Software only at the moment, but I will have the makefile updated to build the GL builds as well.
1999-12-26 13:51:52 +00:00
/*
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.
*/
//
// d_polysa.s
// x86 assembly-language polygon model drawing code
//
#include "asm_i386.h"
#include "quakeasm.h"
#include "asm_draw.h"
#include "d_ifacea.h"
#if id386
// !!! if this is changed, it must be changed in d_polyse.c too !!!
#define DPS_MAXSPANS MAXHEIGHT+1
// 1 extra for spanpackage that marks end
//#define SPAN_SIZE (((DPS_MAXSPANS + 1 + ((CACHE_SIZE - 1) / spanpackage_t_size)) + 1) * spanpackage_t_size)
Compile fix on some stuff.. Mass movement of completely common files between qw_client and uquake.
1999-12-31 04:39:06 +00:00
#define SPAN_SIZE (1024+1+1+1)*32
Created new subdir: uquake. Pick your favorite U word for the meaning -- Unchained, Ultimate, Ultra, Up Yours, Underworld, Underground, Unified, Unity, etc. You know the drill. This takes care of the "standalone" problem with the wrong name, and the recent snafu with multiple developers working on the same files simultaneously...expect me (and probably others) to start locking dirs when updates are taking place. And yes, this update is really as large as it looks. Software only at the moment, but I will have the makefile updated to build the GL builds as well.
1999-12-26 13:51:52 +00:00
.data
.align 4
p10_minus_p20: .single 0
p01_minus_p21: .single 0
temp0: .single 0
temp1: .single 0
Ltemp: .single 0
aff8entryvec_table: .long LDraw8, LDraw7, LDraw6, LDraw5
.long LDraw4, LDraw3, LDraw2, LDraw1
lzistepx: .long 0
.text
#ifndef NeXT
.extern C(D_PolysetSetEdgeTable)
.extern C(D_RasterizeAliasPolySmooth)
#endif
//----------------------------------------------------------------------
// affine triangle gradient calculation code
//----------------------------------------------------------------------
#define skinwidth 4+0
.globl C(D_PolysetCalcGradients)
C(D_PolysetCalcGradients):
// p00_minus_p20 = r_p0[0] - r_p2[0];
// p01_minus_p21 = r_p0[1] - r_p2[1];
// p10_minus_p20 = r_p1[0] - r_p2[0];
// p11_minus_p21 = r_p1[1] - r_p2[1];
//
// xstepdenominv = 1.0 / (p10_minus_p20 * p01_minus_p21 -
// p00_minus_p20 * p11_minus_p21);
//
// ystepdenominv = -xstepdenominv;
fildl C(r_p0)+0 // r_p0[0]
fildl C(r_p2)+0 // r_p2[0] | r_p0[0]
fildl C(r_p0)+4 // r_p0[1] | r_p2[0] | r_p0[0]
fildl C(r_p2)+4 // r_p2[1] | r_p0[1] | r_p2[0] | r_p0[0]
fildl C(r_p1)+0 // r_p1[0] | r_p2[1] | r_p0[1] | r_p2[0] | r_p0[0]
fildl C(r_p1)+4 // r_p1[1] | r_p1[0] | r_p2[1] | r_p0[1] |
// r_p2[0] | r_p0[0]
fxch %st(3) // r_p0[1] | r_p1[0] | r_p2[1] | r_p1[1] |
// r_p2[0] | r_p0[0]
fsub %st(2),%st(0) // p01_minus_p21 | r_p1[0] | r_p2[1] | r_p1[1] |
// r_p2[0] | r_p0[0]
fxch %st(1) // r_p1[0] | p01_minus_p21 | r_p2[1] | r_p1[1] |
// r_p2[0] | r_p0[0]
fsub %st(4),%st(0) // p10_minus_p20 | p01_minus_p21 | r_p2[1] |
// r_p1[1] | r_p2[0] | r_p0[0]
fxch %st(5) // r_p0[0] | p01_minus_p21 | r_p2[1] |
// r_p1[1] | r_p2[0] | p10_minus_p20
fsubp %st(0),%st(4) // p01_minus_p21 | r_p2[1] | r_p1[1] |
// p00_minus_p20 | p10_minus_p20
fxch %st(2) // r_p1[1] | r_p2[1] | p01_minus_p21 |
// p00_minus_p20 | p10_minus_p20
fsubp %st(0),%st(1) // p11_minus_p21 | p01_minus_p21 |
// p00_minus_p20 | p10_minus_p20
fxch %st(1) // p01_minus_p21 | p11_minus_p21 |
// p00_minus_p20 | p10_minus_p20
flds C(d_xdenom) // d_xdenom | p01_minus_p21 | p11_minus_p21 |
// p00_minus_p20 | p10_minus_p20
fxch %st(4) // p10_minus_p20 | p01_minus_p21 | p11_minus_p21 |
// p00_minus_p20 | d_xdenom
fstps p10_minus_p20 // p01_minus_p21 | p11_minus_p21 |
// p00_minus_p20 | d_xdenom
fstps p01_minus_p21 // p11_minus_p21 | p00_minus_p20 | xstepdenominv
fxch %st(2) // xstepdenominv | p00_minus_p20 | p11_minus_p21
//// ceil () for light so positive steps are exaggerated, negative steps
//// diminished, pushing us away from underflow toward overflow. Underflow is
//// very visible, overflow is very unlikely, because of ambient lighting
// t0 = r_p0[4] - r_p2[4];
// t1 = r_p1[4] - r_p2[4];
fildl C(r_p2)+16 // r_p2[4] | xstepdenominv | p00_minus_p20 |
// p11_minus_p21
fildl C(r_p0)+16 // r_p0[4] | r_p2[4] | xstepdenominv |
// p00_minus_p20 | p11_minus_p21
fildl C(r_p1)+16 // r_p1[4] | r_p0[4] | r_p2[4] | xstepdenominv |
// p00_minus_p20 | p11_minus_p21
fxch %st(2) // r_p2[4] | r_p0[4] | r_p1[4] | xstepdenominv |
// p00_minus_p20 | p11_minus_p21
fld %st(0) // r_p2[4] | r_p2[4] | r_p0[4] | r_p1[4] |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fsubrp %st(0),%st(2) // r_p2[4] | t0 | r_p1[4] | xstepdenominv |
// p00_minus_p20 | p11_minus_p21
fsubrp %st(0),%st(2) // t0 | t1 | xstepdenominv | p00_minus_p20 |
// p11_minus_p21
// r_lstepx = (int)
// ceil((t1 * p01_minus_p21 - t0 * p11_minus_p21) * xstepdenominv);
// r_lstepy = (int)
// ceil((t1 * p00_minus_p20 - t0 * p10_minus_p20) * ystepdenominv);
fld %st(0) // t0 | t0 | t1 | xstepdenominv | p00_minus_p20 |
// p11_minus_p21
fmul %st(5),%st(0) // t0*p11_minus_p21 | t0 | t1 | xstepdenominv |
// p00_minus_p20 | p11_minus_p21
fxch %st(2) // t1 | t0 | t0*p11_minus_p21 | xstepdenominv |
// p00_minus_p20 | p11_minus_p21
fld %st(0) // t1 | t1 | t0 | t0*p11_minus_p21 |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fmuls p01_minus_p21 // t1*p01_minus_p21 | t1 | t0 | t0*p11_minus_p21 |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fxch %st(2) // t0 | t1 | t1*p01_minus_p21 | t0*p11_minus_p21 |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fmuls p10_minus_p20 // t0*p10_minus_p20 | t1 | t1*p01_minus_p21 |
// t0*p11_minus_p21 | xstepdenominv |
// p00_minus_p20 | p11_minus_p21
fxch %st(1) // t1 | t0*p10_minus_p20 | t1*p01_minus_p21 |
// t0*p11_minus_p21 | xstepdenominv |
// p00_minus_p20 | p11_minus_p21
fmul %st(5),%st(0) // t1*p00_minus_p20 | t0*p10_minus_p20 |
// t1*p01_minus_p21 | t0*p11_minus_p21 |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fxch %st(2) // t1*p01_minus_p21 | t0*p10_minus_p20 |
// t1*p00_minus_p20 | t0*p11_minus_p21 |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fsubp %st(0),%st(3) // t0*p10_minus_p20 | t1*p00_minus_p20 |
// t1*p01_minus_p21 - t0*p11_minus_p21 |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fsubrp %st(0),%st(1) // t1*p00_minus_p20 - t0*p10_minus_p20 |
// t1*p01_minus_p21 - t0*p11_minus_p21 |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fld %st(2) // xstepdenominv |
// t1*p00_minus_p20 - t0*p10_minus_p20 |
// t1*p01_minus_p21 - t0*p11_minus_p21 |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fmuls float_minus_1 // ystepdenominv |
// t1*p00_minus_p20 - t0*p10_minus_p20 |
// t1*p01_minus_p21 - t0*p11_minus_p21 |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fxch %st(2) // t1*p01_minus_p21 - t0*p11_minus_p21 |
// t1*p00_minus_p20 - t0*p10_minus_p20 |
// ystepdenominv | xstepdenominv | p00_minus_p20 |
// p11_minus_p21
fmul %st(3),%st(0) // (t1*p01_minus_p21 - t0*p11_minus_p21)*
// xstepdenominv |
// t1*p00_minus_p20 - t0*p10_minus_p20 |
// | ystepdenominv | xstepdenominv |
// p00_minus_p20 | p11_minus_p21
fxch %st(1) // t1*p00_minus_p20 - t0*p10_minus_p20 |
// (t1*p01_minus_p21 - t0*p11_minus_p21)*
// xstepdenominv | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fmul %st(2),%st(0) // (t1*p00_minus_p20 - t0*p10_minus_p20)*
// ystepdenominv |
// (t1*p01_minus_p21 - t0*p11_minus_p21)*
// xstepdenominv | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fldcw ceil_cw
fistpl C(r_lstepy) // r_lstepx | ystepdenominv | xstepdenominv |
// p00_minus_p20 | p11_minus_p21
fistpl C(r_lstepx) // ystepdenominv | xstepdenominv | p00_minus_p20 |
// p11_minus_p21
fldcw single_cw
// t0 = r_p0[2] - r_p2[2];
// t1 = r_p1[2] - r_p2[2];
fildl C(r_p2)+8 // r_p2[2] | ystepdenominv | xstepdenominv |
// p00_minus_p20 | p11_minus_p21
fildl C(r_p0)+8 // r_p0[2] | r_p2[2] | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fildl C(r_p1)+8 // r_p1[2] | r_p0[2] | r_p2[2] | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fxch %st(2) // r_p2[2] | r_p0[2] | r_p1[2] | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fld %st(0) // r_p2[2] | r_p2[2] | r_p0[2] | r_p1[2] |
// ystepdenominv | xstepdenominv | p00_minus_p20 |
// p11_minus_p21
fsubrp %st(0),%st(2) // r_p2[2] | t0 | r_p1[2] | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fsubrp %st(0),%st(2) // t0 | t1 | ystepdenominv | xstepdenominv |
// p00_minus_p20 | p11_minus_p21
// r_sstepx = (int)((t1 * p01_minus_p21 - t0 * p11_minus_p21) *
// xstepdenominv);
// r_sstepy = (int)((t1 * p00_minus_p20 - t0 * p10_minus_p20) *
// ystepdenominv);
fld %st(0) // t0 | t0 | t1 | ystepdenominv | xstepdenominv
fmul %st(6),%st(0) // t0*p11_minus_p21 | t0 | t1 | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fxch %st(2) // t1 | t0 | t0*p11_minus_p21 | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fld %st(0) // t1 | t1 | t0 | t0*p11_minus_p21 |
// ystepdenominv | xstepdenominv | p00_minus_p20 |
// p11_minus_p21
fmuls p01_minus_p21 // t1*p01_minus_p21 | t1 | t0 | t0*p11_minus_p21 |
// ystepdenominv | xstepdenominv | p00_minus_p20 |
// p11_minus_p21
fxch %st(2) // t0 | t1 | t1*p01_minus_p21 | t0*p11_minus_p21 |
// ystepdenominv | xstepdenominv | p00_minus_p20 |
// p11_minus_p21
fmuls p10_minus_p20 // t0*p10_minus_p20 | t1 | t1*p01_minus_p21 |
// t0*p11_minus_p21 | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fxch %st(1) // t1 | t0*p10_minus_p20 | t1*p01_minus_p21 |
// t0*p11_minus_p21 | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fmul %st(6),%st(0) // t1*p00_minus_p20 | t0*p10_minus_p20 |
// t1*p01_minus_p21 | t0*p11_minus_p21 |
// ystepdenominv | xstepdenominv | p00_minus_p20 |
// p11_minus_p21
fxch %st(2) // t1*p01_minus_p21 | t0*p10_minus_p20 |
// t1*p00_minus_p20 | t0*p11_minus_p21 |
// ystepdenominv | xstepdenominv | p00_minus_p20 |
// p11_minus_p21
fsubp %st(0),%st(3) // t0*p10_minus_p20 | t1*p00_minus_p20 |
// t1*p01_minus_p21 - t0*p11_minus_p21 |
// ystepdenominv | xstepdenominv | p00_minus_p20 |
// p11_minus_p21
fsubrp %st(0),%st(1) // t1*p00_minus_p20 - t0*p10_minus_p20 |
// t1*p01_minus_p21 - t0*p11_minus_p21 |
// ystepdenominv | xstepdenominv | p00_minus_p20 |
// p11_minus_p21
fmul %st(2),%st(0) // (t1*p00_minus_p20 - t0*p10_minus_p20)*
// ystepdenominv |
// t1*p01_minus_p21 - t0*p11_minus_p21 |
// ystepdenominv | xstepdenominv | p00_minus_p20 |
// p11_minus_p21
fxch %st(1) // t1*p01_minus_p21 - t0*p11_minus_p21 |
// (t1*p00_minus_p20 - t0*p10_minus_p20)*
// ystepdenominv | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fmul %st(3),%st(0) // (t1*p01_minus_p21 - t0*p11_minus_p21)*
// xstepdenominv |
// (t1*p00_minus_p20 - t0*p10_minus_p20)*
// ystepdenominv | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fxch %st(1) // (t1*p00_minus_p20 - t0*p10_minus_p20)*
// ystepdenominv |
// (t1*p01_minus_p21 - t0*p11_minus_p21)*
// xstepdenominv | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fistpl C(r_sstepy) // r_sstepx | ystepdenominv | xstepdenominv |
// p00_minus_p20 | p11_minus_p21
fistpl C(r_sstepx) // ystepdenominv | xstepdenominv | p00_minus_p20 |
// p11_minus_p21
// t0 = r_p0[3] - r_p2[3];
// t1 = r_p1[3] - r_p2[3];
fildl C(r_p2)+12 // r_p2[3] | ystepdenominv | xstepdenominv |
// p00_minus_p20 | p11_minus_p21
fildl C(r_p0)+12 // r_p0[3] | r_p2[3] | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fildl C(r_p1)+12 // r_p1[3] | r_p0[3] | r_p2[3] | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fxch %st(2) // r_p2[3] | r_p0[3] | r_p1[3] | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fld %st(0) // r_p2[3] | r_p2[3] | r_p0[3] | r_p1[3] |
// ystepdenominv | xstepdenominv | p00_minus_p20 |
// p11_minus_p21
fsubrp %st(0),%st(2) // r_p2[3] | t0 | r_p1[3] | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fsubrp %st(0),%st(2) // t0 | t1 | ystepdenominv | xstepdenominv |
// p00_minus_p20 | p11_minus_p21
// r_tstepx = (int)((t1 * p01_minus_p21 - t0 * p11_minus_p21) *
// xstepdenominv);
// r_tstepy = (int)((t1 * p00_minus_p20 - t0 * p10_minus_p20) *
// ystepdenominv);
fld %st(0) // t0 | t0 | t1 | ystepdenominv | xstepdenominv |
// p00_minus_p20 | p11_minus_p21
fmul %st(6),%st(0) // t0*p11_minus_p21 | t0 | t1 | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fxch %st(2) // t1 | t0 | t0*p11_minus_p21 | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fld %st(0) // t1 | t1 | t0 | t0*p11_minus_p21 |
// ystepdenominv | xstepdenominv | p00_minus_p20 |
// p11_minus_p21
fmuls p01_minus_p21 // t1*p01_minus_p21 | t1 | t0 | t0*p11_minus_p21 |
// ystepdenominv | xstepdenominv | p00_minus_p20 |
// p11_minus_p21
fxch %st(2) // t0 | t1 | t1*p01_minus_p21 | t0*p11_minus_p21 |
// ystepdenominv | xstepdenominv | p00_minus_p20 |
// p11_minus_p21
fmuls p10_minus_p20 // t0*p10_minus_p20 | t1 | t1*p01_minus_p21 |
// t0*p11_minus_p21 | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fxch %st(1) // t1 | t0*p10_minus_p20 | t1*p01_minus_p21 |
// t0*p11_minus_p21 | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fmul %st(6),%st(0) // t1*p00_minus_p20 | t0*p10_minus_p20 |
// t1*p01_minus_p21 | t0*p11_minus_p21 |
// ystepdenominv | xstepdenominv | p00_minus_p20 |
// p11_minus_p21
fxch %st(2) // t1*p01_minus_p21 | t0*p10_minus_p20 |
// t1*p00_minus_p20 | t0*p11_minus_p21 |
// ystepdenominv | xstepdenominv | p00_minus_p20 |
// p11_minus_p21
fsubp %st(0),%st(3) // t0*p10_minus_p20 | t1*p00_minus_p20 |
// t1*p01_minus_p21 - t0*p11_minus_p21 |
// ystepdenominv | xstepdenominv | p00_minus_p20 |
// p11_minus_p21
fsubrp %st(0),%st(1) // t1*p00_minus_p20 - t0*p10_minus_p20 |
// t1*p01_minus_p21 - t0*p11_minus_p21 |
// ystepdenominv | xstepdenominv | p00_minus_p20 |
// p11_minus_p21
fmul %st(2),%st(0) // (t1*p00_minus_p20 - t0*p10_minus_p20)*
// ystepdenominv |
// t1*p01_minus_p21 - t0*p11_minus_p21 |
// ystepdenominv | xstepdenominv | p00_minus_p20 |
// p11_minus_p21
fxch %st(1) // t1*p01_minus_p21 - t0*p11_minus_p21 |
// (t1*p00_minus_p20 - t0*p10_minus_p20)*
// ystepdenominv | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fmul %st(3),%st(0) // (t1*p01_minus_p21 - t0*p11_minus_p21)*
// xstepdenominv |
// (t1*p00_minus_p20 - t0*p10_minus_p20)*
// ystepdenominv | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fxch %st(1) // (t1*p00_minus_p20 - t0*p10_minus_p20)*
// ystepdenominv |
// (t1*p01_minus_p21 - t0*p11_minus_p21)*
// xstepdenominv | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fistpl C(r_tstepy) // r_tstepx | ystepdenominv | xstepdenominv |
// p00_minus_p20 | p11_minus_p21
fistpl C(r_tstepx) // ystepdenominv | xstepdenominv | p00_minus_p20 |
// p11_minus_p21
// t0 = r_p0[5] - r_p2[5];
// t1 = r_p1[5] - r_p2[5];
fildl C(r_p2)+20 // r_p2[5] | ystepdenominv | xstepdenominv |
// p00_minus_p20 | p11_minus_p21
fildl C(r_p0)+20 // r_p0[5] | r_p2[5] | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fildl C(r_p1)+20 // r_p1[5] | r_p0[5] | r_p2[5] | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fxch %st(2) // r_p2[5] | r_p0[5] | r_p1[5] | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fld %st(0) // r_p2[5] | r_p2[5] | r_p0[5] | r_p1[5] |
// ystepdenominv | xstepdenominv | p00_minus_p20 |
// p11_minus_p21
fsubrp %st(0),%st(2) // r_p2[5] | t0 | r_p1[5] | ystepdenominv |
// xstepdenominv | p00_minus_p20 | p11_minus_p21
fsubrp %st(0),%st(2) // t0 | t1 | ystepdenominv | xstepdenominv |
// p00_minus_p20 | p11_minus_p21
// r_zistepx = (int)((t1 * p01_minus_p21 - t0 * p11_minus_p21) *
// xstepdenominv);
// r_zistepy = (int)((t1 * p00_minus_p20 - t0 * p10_minus_p20) *
// ystepdenominv);
fld %st(0) // t0 | t0 | t1 | ystepdenominv | xstepdenominv |
// p00_minus_p20 | p11_minus_p21
fmulp %st(0),%st(6) // t0 | t1 | ystepdenominv | xstepdenominv |
// p00_minus_p20 | t0*p11_minus_p21
fxch %st(1) // t1 | t0 | ystepdenominv | xstepdenominv |
// p00_minus_p20 | t0*p11_minus_p21
fld %st(0) // t1 | t1 | t0 | ystepdenominv | xstepdenominv |
// p00_minus_p20 | t0*p11_minus_p21
fmuls p01_minus_p21 // t1*p01_minus_p21 | t1 | t0 | ystepdenominv |
// xstepdenominv | p00_minus_p20 |
// t0*p11_minus_p21
fxch %st(2) // t0 | t1 | t1*p01_minus_p21 | ystepdenominv |
// xstepdenominv | p00_minus_p20 |
// t0*p11_minus_p21
fmuls p10_minus_p20 // t0*p10_minus_p20 | t1 | t1*p01_minus_p21 |
// ystepdenominv | xstepdenominv | p00_minus_p20 |
// t0*p11_minus_p21
fxch %st(1) // t1 | t0*p10_minus_p20 | t1*p01_minus_p21 |
// ystepdenominv | xstepdenominv | p00_minus_p20 |
// t0*p11_minus_p21
fmulp %st(0),%st(5) // t0*p10_minus_p20 | t1*p01_minus_p21 |
// ystepdenominv | xstepdenominv |
// t1*p00_minus_p20 | t0*p11_minus_p21
fxch %st(5) // t0*p11_minus_p21 | t1*p01_minus_p21 |
// ystepdenominv | xstepdenominv |
// t1*p00_minus_p20 | t0*p10_minus_p20
fsubrp %st(0),%st(1) // t1*p01_minus_p21 - t0*p11_minus_p21 |
// ystepdenominv | xstepdenominv |
// t1*p00_minus_p20 | t0*p10_minus_p20
fxch %st(3) // t1*p00_minus_p20 | ystepdenominv |
// xstepdenominv |
// t1*p01_minus_p21 - t0*p11_minus_p21 |
// t0*p10_minus_p20
fsubp %st(0),%st(4) // ystepdenominv | xstepdenominv |
// t1*p01_minus_p21 - t0*p11_minus_p21 |
// t1*p00_minus_p20 - t0*p10_minus_p20
fxch %st(1) // xstepdenominv | ystepdenominv |
// t1*p01_minus_p21 - t0*p11_minus_p21 |
// t1*p00_minus_p20 - t0*p10_minus_p20
fmulp %st(0),%st(2) // ystepdenominv |
// (t1*p01_minus_p21 - t0*p11_minus_p21) *
// xstepdenominv |
// t1*p00_minus_p20 - t0*p10_minus_p20
fmulp %st(0),%st(2) // (t1*p01_minus_p21 - t0*p11_minus_p21) *
// xstepdenominv |
// (t1*p00_minus_p20 - t0*p10_minus_p20) *
// ystepdenominv
fistpl C(r_zistepx) // (t1*p00_minus_p20 - t0*p10_minus_p20) *
// ystepdenominv
fistpl C(r_zistepy)
// a_sstepxfrac = r_sstepx << 16;
// a_tstepxfrac = r_tstepx << 16;
//
// a_ststepxwhole = r_affinetridesc.skinwidth * (r_tstepx >> 16) +
// (r_sstepx >> 16);
movl C(r_sstepx),%eax
movl C(r_tstepx),%edx
shll $16,%eax
shll $16,%edx
movl %eax,C(a_sstepxfrac)
movl %edx,C(a_tstepxfrac)
movl C(r_sstepx),%ecx
movl C(r_tstepx),%eax
sarl $16,%ecx
sarl $16,%eax
imull skinwidth(%esp)
addl %ecx,%eax
movl %eax,C(a_ststepxwhole)
ret
//----------------------------------------------------------------------
// recursive subdivision affine triangle drawing code
//
// not C-callable because of stdcall return
//----------------------------------------------------------------------
#define lp1 4+16
#define lp2 8+16
#define lp3 12+16
.globl C(D_PolysetRecursiveTriangle)
C(D_PolysetRecursiveTriangle):
pushl %ebp // preserve caller stack frame pointer
pushl %esi // preserve register variables
pushl %edi
pushl %ebx
// int *temp;
// int d;
// int new[6];
// int i;
// int z;
// short *zbuf;
movl lp2(%esp),%esi
movl lp1(%esp),%ebx
movl lp3(%esp),%edi
// d = lp2[0] - lp1[0];
// if (d < -1 || d > 1)
// goto split;
movl 0(%esi),%eax
movl 0(%ebx),%edx
movl 4(%esi),%ebp
subl %edx,%eax
movl 4(%ebx),%ecx
subl %ecx,%ebp
incl %eax
cmpl $2,%eax
ja LSplit
// d = lp2[1] - lp1[1];
// if (d < -1 || d > 1)
// goto split;
movl 0(%edi),%eax
incl %ebp
cmpl $2,%ebp
ja LSplit
// d = lp3[0] - lp2[0];
// if (d < -1 || d > 1)
// goto split2;
movl 0(%esi),%edx
movl 4(%edi),%ebp
subl %edx,%eax
movl 4(%esi),%ecx
subl %ecx,%ebp
incl %eax
cmpl $2,%eax
ja LSplit2
// d = lp3[1] - lp2[1];
// if (d < -1 || d > 1)
// goto split2;
movl 0(%ebx),%eax
incl %ebp
cmpl $2,%ebp
ja LSplit2
// d = lp1[0] - lp3[0];
// if (d < -1 || d > 1)
// goto split3;
movl 0(%edi),%edx
movl 4(%ebx),%ebp
subl %edx,%eax
movl 4(%edi),%ecx
subl %ecx,%ebp
incl %eax
incl %ebp
movl %ebx,%edx
cmpl $2,%eax
ja LSplit3
// d = lp1[1] - lp3[1];
// if (d < -1 || d > 1)
// {
//split3:
// temp = lp1;
// lp3 = lp2;
// lp1 = lp3;
// lp2 = temp;
// goto split;
// }
//
// return; // entire tri is filled
//
cmpl $2,%ebp
jna LDone
LSplit3:
movl %edi,%ebx
movl %esi,%edi
movl %edx,%esi
jmp LSplit
//split2:
LSplit2:
// temp = lp1;
// lp1 = lp2;
// lp2 = lp3;
// lp3 = temp;
movl %ebx,%eax
movl %esi,%ebx
movl %edi,%esi
movl %eax,%edi
//split:
LSplit:
subl $24,%esp // allocate space for a new vertex
//// split this edge
// new[0] = (lp1[0] + lp2[0]) >> 1;
// new[1] = (lp1[1] + lp2[1]) >> 1;
// new[2] = (lp1[2] + lp2[2]) >> 1;
// new[3] = (lp1[3] + lp2[3]) >> 1;
// new[5] = (lp1[5] + lp2[5]) >> 1;
movl 8(%ebx),%eax
movl 8(%esi),%edx
movl 12(%ebx),%ecx
addl %edx,%eax
movl 12(%esi),%edx
sarl $1,%eax
addl %edx,%ecx
movl %eax,8(%esp)
movl 20(%ebx),%eax
sarl $1,%ecx
movl 20(%esi),%edx
movl %ecx,12(%esp)
addl %edx,%eax
movl 0(%ebx),%ecx
movl 0(%esi),%edx
sarl $1,%eax
addl %ecx,%edx
movl %eax,20(%esp)
movl 4(%ebx),%eax
sarl $1,%edx
movl 4(%esi),%ebp
movl %edx,0(%esp)
addl %eax,%ebp
sarl $1,%ebp
movl %ebp,4(%esp)
//// draw the point if splitting a leading edge
// if (lp2[1] > lp1[1])
// goto nodraw;
cmpl %eax,4(%esi)
jg LNoDraw
// if ((lp2[1] == lp1[1]) && (lp2[0] < lp1[0]))
// goto nodraw;
movl 0(%esi),%edx
jnz LDraw
cmpl %ecx,%edx
jl LNoDraw
LDraw:
// z = new[5] >> 16;
movl 20(%esp),%edx
movl 4(%esp),%ecx
sarl $16,%edx
movl 0(%esp),%ebp
// zbuf = zspantable[new[1]] + new[0];
movl C(zspantable)(,%ecx,4),%eax
// if (z >= *zbuf)
// {
cmpw (%eax,%ebp,2),%dx
jnge LNoDraw
// int pix;
//
// *zbuf = z;
movw %dx,(%eax,%ebp,2)
// pix = d_pcolormap[skintable[new[3]>>16][new[2]>>16]];
movl 12(%esp),%eax
sarl $16,%eax
movl 8(%esp),%edx
sarl $16,%edx
subl %ecx,%ecx
movl C(skintable)(,%eax,4),%eax
movl 4(%esp),%ebp
movb (%eax,%edx,),%cl
movl C(d_pcolormap),%edx
movb (%edx,%ecx,),%dl
movl 0(%esp),%ecx
// d_viewbuffer[d_scantable[new[1]] + new[0]] = pix;
movl C(d_scantable)(,%ebp,4),%eax
addl %eax,%ecx
movl C(d_viewbuffer),%eax
movb %dl,(%eax,%ecx,1)
// }
//
//nodraw:
LNoDraw:
//// recursively continue
// D_PolysetRecursiveTriangle (lp3, lp1, new);
pushl %esp
pushl %ebx
pushl %edi
call C(D_PolysetRecursiveTriangle)
// D_PolysetRecursiveTriangle (lp3, new, lp2);
movl %esp,%ebx
pushl %esi
pushl %ebx
pushl %edi
call C(D_PolysetRecursiveTriangle)
addl $24,%esp
LDone:
popl %ebx // restore register variables
popl %edi
popl %esi
popl %ebp // restore caller stack frame pointer
ret $12
//----------------------------------------------------------------------
// 8-bpp horizontal span drawing code for affine polygons, with smooth
// shading and no transparency
//----------------------------------------------------------------------
#define pspans 4+8
.globl C(D_PolysetAff8Start)
C(D_PolysetAff8Start):
.globl C(D_PolysetDrawSpans8)
C(D_PolysetDrawSpans8):
pushl %esi // preserve register variables
pushl %ebx
movl pspans(%esp),%esi // point to the first span descriptor
movl C(r_zistepx),%ecx
pushl %ebp // preserve caller's stack frame
pushl %edi
rorl $16,%ecx // put high 16 bits of 1/z step in low word
movl spanpackage_t_count(%esi),%edx
movl %ecx,lzistepx
LSpanLoop:
// lcount = d_aspancount - pspanpackage->count;
//
// errorterm += erroradjustup;
// if (errorterm >= 0)
// {
// d_aspancount += d_countextrastep;
// errorterm -= erroradjustdown;
// }
// else
// {
// d_aspancount += ubasestep;
// }
movl C(d_aspancount),%eax
subl %edx,%eax
movl C(erroradjustup),%edx
movl C(errorterm),%ebx
addl %edx,%ebx
js LNoTurnover
movl C(erroradjustdown),%edx
movl C(d_countextrastep),%edi
subl %edx,%ebx
movl C(d_aspancount),%ebp
movl %ebx,C(errorterm)
addl %edi,%ebp
movl %ebp,C(d_aspancount)
jmp LRightEdgeStepped
LNoTurnover:
movl C(d_aspancount),%edi
movl C(ubasestep),%edx
movl %ebx,C(errorterm)
addl %edx,%edi
movl %edi,C(d_aspancount)
LRightEdgeStepped:
cmpl $1,%eax
jl LNextSpan
jz LExactlyOneLong
//
// set up advancetable
//
movl C(a_ststepxwhole),%ecx
movl C(r_affinetridesc)+atd_skinwidth,%edx
movl %ecx,advancetable+4 // advance base in t
addl %edx,%ecx
movl %ecx,advancetable // advance extra in t
movl C(a_tstepxfrac),%ecx
movw C(r_lstepx),%cx
movl %eax,%edx // count
movl %ecx,tstep
addl $7,%edx
shrl $3,%edx // count of full and partial loops
movl spanpackage_t_sfrac(%esi),%ebx
movw %dx,%bx
movl spanpackage_t_pz(%esi),%ecx
negl %eax
movl spanpackage_t_pdest(%esi),%edi
andl $7,%eax // 0->0, 1->7, 2->6, ... , 7->1
subl %eax,%edi // compensate for hardwired offsets
subl %eax,%ecx
subl %eax,%ecx
movl spanpackage_t_tfrac(%esi),%edx
movw spanpackage_t_light(%esi),%dx
movl spanpackage_t_zi(%esi),%ebp
rorl $16,%ebp // put high 16 bits of 1/z in low word
pushl %esi
movl spanpackage_t_ptex(%esi),%esi
jmp *aff8entryvec_table(,%eax,4)
// %bx = count of full and partial loops
// %ebx high word = sfrac
// %ecx = pz
// %dx = light
// %edx high word = tfrac
// %esi = ptex
// %edi = pdest
// %ebp = 1/z
// tstep low word = C(r_lstepx)
// tstep high word = C(a_tstepxfrac)
// C(a_sstepxfrac) low word = 0
// C(a_sstepxfrac) high word = C(a_sstepxfrac)
LDrawLoop:
// FIXME: do we need to clamp light? We may need at least a buffer bit to
// keep it from poking into tfrac and causing problems
LDraw8:
cmpw (%ecx),%bp
jl Lp1
xorl %eax,%eax
movb %dh,%ah
movb (%esi),%al
movw %bp,(%ecx)
movb 0x12345678(%eax),%al
LPatch8:
movb %al,(%edi)
Lp1:
addl tstep,%edx
sbbl %eax,%eax
addl lzistepx,%ebp
adcl $0,%ebp
addl C(a_sstepxfrac),%ebx
adcl advancetable+4(,%eax,4),%esi
LDraw7:
cmpw 2(%ecx),%bp
jl Lp2
xorl %eax,%eax
movb %dh,%ah
movb (%esi),%al
movw %bp,2(%ecx)
movb 0x12345678(%eax),%al
LPatch7:
movb %al,1(%edi)
Lp2:
addl tstep,%edx
sbbl %eax,%eax
addl lzistepx,%ebp
adcl $0,%ebp
addl C(a_sstepxfrac),%ebx
adcl advancetable+4(,%eax,4),%esi
LDraw6:
cmpw 4(%ecx),%bp
jl Lp3
xorl %eax,%eax
movb %dh,%ah
movb (%esi),%al
movw %bp,4(%ecx)
movb 0x12345678(%eax),%al
LPatch6:
movb %al,2(%edi)
Lp3:
addl tstep,%edx
sbbl %eax,%eax
addl lzistepx,%ebp
adcl $0,%ebp
addl C(a_sstepxfrac),%ebx
adcl advancetable+4(,%eax,4),%esi
LDraw5:
cmpw 6(%ecx),%bp
jl Lp4
xorl %eax,%eax
movb %dh,%ah
movb (%esi),%al
movw %bp,6(%ecx)
movb 0x12345678(%eax),%al
LPatch5:
movb %al,3(%edi)
Lp4:
addl tstep,%edx
sbbl %eax,%eax
addl lzistepx,%ebp
adcl $0,%ebp
addl C(a_sstepxfrac),%ebx
adcl advancetable+4(,%eax,4),%esi
LDraw4:
cmpw 8(%ecx),%bp
jl Lp5
xorl %eax,%eax
movb %dh,%ah
movb (%esi),%al
movw %bp,8(%ecx)
movb 0x12345678(%eax),%al
LPatch4:
movb %al,4(%edi)
Lp5:
addl tstep,%edx
sbbl %eax,%eax
addl lzistepx,%ebp
adcl $0,%ebp
addl C(a_sstepxfrac),%ebx
adcl advancetable+4(,%eax,4),%esi
LDraw3:
cmpw 10(%ecx),%bp
jl Lp6
xorl %eax,%eax
movb %dh,%ah
movb (%esi),%al
movw %bp,10(%ecx)
movb 0x12345678(%eax),%al
LPatch3:
movb %al,5(%edi)
Lp6:
addl tstep,%edx
sbbl %eax,%eax
addl lzistepx,%ebp
adcl $0,%ebp
addl C(a_sstepxfrac),%ebx
adcl advancetable+4(,%eax,4),%esi
LDraw2:
cmpw 12(%ecx),%bp
jl Lp7
xorl %eax,%eax
movb %dh,%ah
movb (%esi),%al
movw %bp,12(%ecx)
movb 0x12345678(%eax),%al
LPatch2:
movb %al,6(%edi)
Lp7:
addl tstep,%edx
sbbl %eax,%eax
addl lzistepx,%ebp
adcl $0,%ebp
addl C(a_sstepxfrac),%ebx
adcl advancetable+4(,%eax,4),%esi
LDraw1:
cmpw 14(%ecx),%bp
jl Lp8
xorl %eax,%eax
movb %dh,%ah
movb (%esi),%al
movw %bp,14(%ecx)
movb 0x12345678(%eax),%al
LPatch1:
movb %al,7(%edi)
Lp8:
addl tstep,%edx
sbbl %eax,%eax
addl lzistepx,%ebp
adcl $0,%ebp
addl C(a_sstepxfrac),%ebx
adcl advancetable+4(,%eax,4),%esi
addl $8,%edi
addl $16,%ecx
decw %bx
jnz LDrawLoop
popl %esi // restore spans pointer
LNextSpan:
addl $(spanpackage_t_size),%esi // point to next span
LNextSpanESISet:
movl spanpackage_t_count(%esi),%edx
cmpl $-999999,%edx // any more spans?
jnz LSpanLoop // yes
popl %edi
popl %ebp // restore the caller's stack frame
popl %ebx // restore register variables
popl %esi
ret
// draw a one-long span
LExactlyOneLong:
movl spanpackage_t_pz(%esi),%ecx
movl spanpackage_t_zi(%esi),%ebp
rorl $16,%ebp // put high 16 bits of 1/z in low word
movl spanpackage_t_ptex(%esi),%ebx
cmpw (%ecx),%bp
jl LNextSpan
xorl %eax,%eax
movl spanpackage_t_pdest(%esi),%edi
movb spanpackage_t_light+1(%esi),%ah
addl $(spanpackage_t_size),%esi // point to next span
movb (%ebx),%al
movw %bp,(%ecx)
movb 0x12345678(%eax),%al
LPatch9:
movb %al,(%edi)
jmp LNextSpanESISet
.globl C(D_PolysetAff8End)
C(D_PolysetAff8End):
#define pcolormap 4
.globl C(D_Aff8Patch)
C(D_Aff8Patch):
movl pcolormap(%esp),%eax
movl %eax,LPatch1-4
movl %eax,LPatch2-4
movl %eax,LPatch3-4
movl %eax,LPatch4-4
movl %eax,LPatch5-4
movl %eax,LPatch6-4
movl %eax,LPatch7-4
movl %eax,LPatch8-4
movl %eax,LPatch9-4
ret
//----------------------------------------------------------------------
// Alias model polygon dispatching code, combined with subdivided affine
// triangle drawing code
//----------------------------------------------------------------------
.globl C(D_PolysetDraw)
C(D_PolysetDraw):
// spanpackage_t spans[DPS_MAXSPANS + 1 +
// ((CACHE_SIZE - 1) / sizeof(spanpackage_t)) + 1];
// // one extra because of cache line pretouching
//
// a_spans = (spanpackage_t *)
// (((long)&spans[0] + CACHE_SIZE - 1) & ~(CACHE_SIZE - 1));
subl $(SPAN_SIZE),%esp
movl %esp,%eax
addl $(CACHE_SIZE - 1),%eax
andl $(~(CACHE_SIZE - 1)),%eax
movl %eax,C(a_spans)
// if (r_affinetridesc.drawtype)
// D_DrawSubdiv ();
// else
// D_DrawNonSubdiv ();
movl C(r_affinetridesc)+atd_drawtype,%eax
testl %eax,%eax
jz C(D_DrawNonSubdiv)
pushl %ebp // preserve caller stack frame pointer
// lnumtriangles = r_affinetridesc.numtriangles;
movl C(r_affinetridesc)+atd_numtriangles,%ebp
pushl %esi // preserve register variables
shll $4,%ebp
pushl %ebx
// ptri = r_affinetridesc.ptriangles;
movl C(r_affinetridesc)+atd_ptriangles,%ebx
pushl %edi
// mtriangle_t *ptri;
// finalvert_t *pfv, *index0, *index1, *index2;
// int i;
// int lnumtriangles;
// int s0, s1, s2;
// pfv = r_affinetridesc.pfinalverts;
movl C(r_affinetridesc)+atd_pfinalverts,%edi
// for (i=0 ; i<lnumtriangles ; i++)
// {
Llooptop:
// index0 = pfv + ptri[i].vertindex[0];
// index1 = pfv + ptri[i].vertindex[1];
// index2 = pfv + ptri[i].vertindex[2];
movl mtri_vertindex-16+0(%ebx,%ebp,),%ecx
movl mtri_vertindex-16+4(%ebx,%ebp,),%esi
shll $(fv_shift),%ecx
movl mtri_vertindex-16+8(%ebx,%ebp,),%edx
shll $(fv_shift),%esi
addl %edi,%ecx
shll $(fv_shift),%edx
addl %edi,%esi
addl %edi,%edx
// if (((index0->v[1]-index1->v[1]) *
// (index0->v[0]-index2->v[0]) -
// (index0->v[0]-index1->v[0])*(index0->v[1]-index2->v[1])) >= 0)
// {
// continue;
// }
//
// d_pcolormap = &((byte *)acolormap)[index0->v[4] & 0xFF00];
fildl fv_v+4(%ecx) // i0v1
fildl fv_v+4(%esi) // i1v1 | i0v1
fildl fv_v+0(%ecx) // i0v0 | i1v1 | i0v1
fildl fv_v+0(%edx) // i2v0 | i0v0 | i1v1 | i0v1
fxch %st(2) // i1v1 | i0v0 | i2v0 | i0v1
fsubr %st(3),%st(0) // i0v1-i1v1 | i0v0 | i2v0 | i0v1
fildl fv_v+0(%esi) // i1v0 | i0v1-i1v1 | i0v0 | i2v0 | i0v1
fxch %st(2) // i0v0 | i0v1-i1v1 | i1v0 | i2v0 | i0v1
fsub %st(0),%st(3) // i0v0 | i0v1-i1v1 | i1v0 | i0v0-i2v0 | i0v1
fildl fv_v+4(%edx) // i2v1 | i0v0 | i0v1-i1v1 | i1v0 | i0v0-i2v0| i0v1
fxch %st(1) // i0v0 | i2v1 | i0v1-i1v1 | i1v0 | i0v0-i2v0| i0v1
fsubp %st(0),%st(3) // i2v1 | i0v1-i1v1 | i0v0-i1v0 | i0v0-i2v0 | i0v1
fxch %st(1) // i0v1-i1v1 | i2v1 | i0v0-i1v0 | i0v0-i2v0 | i0v1
fmulp %st(0),%st(3) // i2v1 | i0v0-i1v0 | i0v1-i1v1*i0v0-i2v0 | i0v1
fsubrp %st(0),%st(3) // i0v0-i1v0 | i0v1-i1v1*i0v0-i2v0 | i0v1-i2v1
movl fv_v+16(%ecx),%eax
andl $0xFF00,%eax
fmulp %st(0),%st(2) // i0v1-i1v1*i0v0-i2v0 | i0v0-i1v0*i0v1-i2v1
addl C(acolormap),%eax
fsubp %st(0),%st(1) // (i0v1-i1v1)*(i0v0-i2v0)-(i0v0-i1v0)*(i0v1-i2v1)
movl %eax,C(d_pcolormap)
fstps Ltemp
movl Ltemp,%eax
subl $0x80000001,%eax
jc Lskip
// if (ptri[i].facesfront)
// {
// D_PolysetRecursiveTriangle(index0->v, index1->v, index2->v);
movl mtri_facesfront-16(%ebx,%ebp,),%eax
testl %eax,%eax
jz Lfacesback
pushl %edx
pushl %esi
pushl %ecx
call C(D_PolysetRecursiveTriangle)
subl $16,%ebp
jnz Llooptop
jmp Ldone2
// }
// else
// {
Lfacesback:
// s0 = index0->v[2];
// s1 = index1->v[2];
// s2 = index2->v[2];
movl fv_v+8(%ecx),%eax
pushl %eax
movl fv_v+8(%esi),%eax
pushl %eax
movl fv_v+8(%edx),%eax
pushl %eax
pushl %ecx
pushl %edx
// if (index0->flags & ALIAS_ONSEAM)
// index0->v[2] += r_affinetridesc.seamfixupX16;
movl C(r_affinetridesc)+atd_seamfixupX16,%eax
testl $(ALIAS_ONSEAM),fv_flags(%ecx)
jz Lp11
addl %eax,fv_v+8(%ecx)
Lp11:
// if (index1->flags & ALIAS_ONSEAM)
// index1->v[2] += r_affinetridesc.seamfixupX16;
testl $(ALIAS_ONSEAM),fv_flags(%esi)
jz Lp12
addl %eax,fv_v+8(%esi)
Lp12:
// if (index2->flags & ALIAS_ONSEAM)
// index2->v[2] += r_affinetridesc.seamfixupX16;
testl $(ALIAS_ONSEAM),fv_flags(%edx)
jz Lp13
addl %eax,fv_v+8(%edx)
Lp13:
// D_PolysetRecursiveTriangle(index0->v, index1->v, index2->v);
pushl %edx
pushl %esi
pushl %ecx
call C(D_PolysetRecursiveTriangle)
// index0->v[2] = s0;
// index1->v[2] = s1;
// index2->v[2] = s2;
popl %edx
popl %ecx
popl %eax
movl %eax,fv_v+8(%edx)
popl %eax
movl %eax,fv_v+8(%esi)
popl %eax
movl %eax,fv_v+8(%ecx)
// }
// }
Lskip:
subl $16,%ebp
jnz Llooptop
Ldone2:
popl %edi // restore the caller's stack frame
popl %ebx
popl %esi // restore register variables
popl %ebp
addl $(SPAN_SIZE),%esp
ret
//----------------------------------------------------------------------
// Alias model triangle left-edge scanning code
//----------------------------------------------------------------------
#define height 4+16
.globl C(D_PolysetScanLeftEdge)
C(D_PolysetScanLeftEdge):
pushl %ebp // preserve caller stack frame pointer
pushl %esi // preserve register variables
pushl %edi
pushl %ebx
movl height(%esp),%eax
movl C(d_sfrac),%ecx
andl $0xFFFF,%eax
movl C(d_ptex),%ebx
orl %eax,%ecx
movl C(d_pedgespanpackage),%esi
movl C(d_tfrac),%edx
movl C(d_light),%edi
movl C(d_zi),%ebp
// %eax: scratch
// %ebx: d_ptex
// %ecx: d_sfrac in high word, count in low word
// %edx: d_tfrac
// %esi: d_pedgespanpackage, errorterm, scratch alternately
// %edi: d_light
// %ebp: d_zi
// do
// {
LScanLoop:
// d_pedgespanpackage->ptex = ptex;
// d_pedgespanpackage->pdest = d_pdest;
// d_pedgespanpackage->pz = d_pz;
// d_pedgespanpackage->count = d_aspancount;
// d_pedgespanpackage->light = d_light;
// d_pedgespanpackage->zi = d_zi;
// d_pedgespanpackage->sfrac = d_sfrac << 16;
// d_pedgespanpackage->tfrac = d_tfrac << 16;
movl %ebx,spanpackage_t_ptex(%esi)
movl C(d_pdest),%eax
movl %eax,spanpackage_t_pdest(%esi)
movl C(d_pz),%eax
movl %eax,spanpackage_t_pz(%esi)
movl C(d_aspancount),%eax
movl %eax,spanpackage_t_count(%esi)
movl %edi,spanpackage_t_light(%esi)
movl %ebp,spanpackage_t_zi(%esi)
movl %ecx,spanpackage_t_sfrac(%esi)
movl %edx,spanpackage_t_tfrac(%esi)
// pretouch the next cache line
movb spanpackage_t_size(%esi),%al
// d_pedgespanpackage++;
addl $(spanpackage_t_size),%esi
movl C(erroradjustup),%eax
movl %esi,C(d_pedgespanpackage)
// errorterm += erroradjustup;
movl C(errorterm),%esi
addl %eax,%esi
movl C(d_pdest),%eax
// if (errorterm >= 0)
// {
js LNoLeftEdgeTurnover
// errorterm -= erroradjustdown;
// d_pdest += d_pdestextrastep;
subl C(erroradjustdown),%esi
addl C(d_pdestextrastep),%eax
movl %esi,C(errorterm)
movl %eax,C(d_pdest)
// d_pz += d_pzextrastep;
// d_aspancount += d_countextrastep;
// d_ptex += d_ptexextrastep;
// d_sfrac += d_sfracextrastep;
// d_ptex += d_sfrac >> 16;
// d_sfrac &= 0xFFFF;
// d_tfrac += d_tfracextrastep;
movl C(d_pz),%eax
movl C(d_aspancount),%esi
addl C(d_pzextrastep),%eax
addl C(d_sfracextrastep),%ecx
adcl C(d_ptexextrastep),%ebx
addl C(d_countextrastep),%esi
movl %eax,C(d_pz)
movl C(d_tfracextrastep),%eax
movl %esi,C(d_aspancount)
addl %eax,%edx
// if (d_tfrac & 0x10000)
// {
jnc LSkip1
// d_ptex += r_affinetridesc.skinwidth;
// d_tfrac &= 0xFFFF;
addl C(r_affinetridesc)+atd_skinwidth,%ebx
// }
LSkip1:
// d_light += d_lightextrastep;
// d_zi += d_ziextrastep;
addl C(d_lightextrastep),%edi
addl C(d_ziextrastep),%ebp
// }
movl C(d_pedgespanpackage),%esi
decl %ecx
testl $0xFFFF,%ecx
jnz LScanLoop
popl %ebx
popl %edi
popl %esi
popl %ebp
ret
// else
// {
LNoLeftEdgeTurnover:
movl %esi,C(errorterm)
// d_pdest += d_pdestbasestep;
addl C(d_pdestbasestep),%eax
movl %eax,C(d_pdest)
// d_pz += d_pzbasestep;
// d_aspancount += ubasestep;
// d_ptex += d_ptexbasestep;
// d_sfrac += d_sfracbasestep;
// d_ptex += d_sfrac >> 16;
// d_sfrac &= 0xFFFF;
movl C(d_pz),%eax
movl C(d_aspancount),%esi
addl C(d_pzbasestep),%eax
addl C(d_sfracbasestep),%ecx
adcl C(d_ptexbasestep),%ebx
addl C(ubasestep),%esi
movl %eax,C(d_pz)
movl %esi,C(d_aspancount)
// d_tfrac += d_tfracbasestep;
movl C(d_tfracbasestep),%esi
addl %esi,%edx
// if (d_tfrac & 0x10000)
// {
jnc LSkip2
// d_ptex += r_affinetridesc.skinwidth;
// d_tfrac &= 0xFFFF;
addl C(r_affinetridesc)+atd_skinwidth,%ebx
// }
LSkip2:
// d_light += d_lightbasestep;
// d_zi += d_zibasestep;
addl C(d_lightbasestep),%edi
addl C(d_zibasestep),%ebp
// }
// } while (--height);
movl C(d_pedgespanpackage),%esi
decl %ecx
testl $0xFFFF,%ecx
jnz LScanLoop
popl %ebx
popl %edi
popl %esi
popl %ebp
ret
//----------------------------------------------------------------------
// Alias model vertex drawing code
//----------------------------------------------------------------------
#define fv 4+8
#define numverts 8+8
.globl C(D_PolysetDrawFinalVerts)
C(D_PolysetDrawFinalVerts):
pushl %ebp // preserve caller stack frame pointer
pushl %ebx
// int i, z;
// short *zbuf;
movl numverts(%esp),%ecx
movl fv(%esp),%ebx
pushl %esi // preserve register variables
pushl %edi
LFVLoop:
// for (i=0 ; i<numverts ; i++, fv++)
// {
// // valid triangle coordinates for filling can include the bottom and
// // right clip edges, due to the fill rule; these shouldn't be drawn
// if ((fv->v[0] < r_refdef.vrectright) &&
// (fv->v[1] < r_refdef.vrectbottom))
// {
movl fv_v+0(%ebx),%eax
movl C(r_refdef)+rd_vrectright,%edx
cmpl %edx,%eax
jge LNextVert
movl fv_v+4(%ebx),%esi
movl C(r_refdef)+rd_vrectbottom,%edx
cmpl %edx,%esi
jge LNextVert
// zbuf = zspantable[fv->v[1]] + fv->v[0];
movl C(zspantable)(,%esi,4),%edi
// z = fv->v[5]>>16;
movl fv_v+20(%ebx),%edx
shrl $16,%edx
// if (z >= *zbuf)
// {
// int pix;
cmpw (%edi,%eax,2),%dx
jl LNextVert
// *zbuf = z;
movw %dx,(%edi,%eax,2)
// pix = skintable[fv->v[3]>>16][fv->v[2]>>16];
movl fv_v+12(%ebx),%edi
shrl $16,%edi
movl C(skintable)(,%edi,4),%edi
movl fv_v+8(%ebx),%edx
shrl $16,%edx
movb (%edi,%edx),%dl
// pix = ((byte *)acolormap)[pix + (fv->v[4] & 0xFF00)];
movl fv_v+16(%ebx),%edi
andl $0xFF00,%edi
andl $0x00FF,%edx
addl %edx,%edi
movl C(acolormap),%edx
movb (%edx,%edi,1),%dl
// d_viewbuffer[d_scantable[fv->v[1]] + fv->v[0]] = pix;
movl C(d_scantable)(,%esi,4),%edi
movl C(d_viewbuffer),%esi
addl %eax,%edi
movb %dl,(%esi,%edi)
// }
// }
// }
LNextVert:
addl $(fv_size),%ebx
decl %ecx
jnz LFVLoop
popl %edi
popl %esi
popl %ebx
popl %ebp
ret
//----------------------------------------------------------------------
// Alias model non-subdivided polygon dispatching code
//
// not C-callable because of stack buffer cleanup
//----------------------------------------------------------------------
.globl C(D_DrawNonSubdiv)
C(D_DrawNonSubdiv):
pushl %ebp // preserve caller stack frame pointer
movl C(r_affinetridesc)+atd_numtriangles,%ebp
pushl %ebx
shll $(mtri_shift),%ebp
pushl %esi // preserve register variables
movl C(r_affinetridesc)+atd_ptriangles,%esi
pushl %edi
// mtriangle_t *ptri;
// finalvert_t *pfv, *index0, *index1, *index2;
// int i;
// int lnumtriangles;
// pfv = r_affinetridesc.pfinalverts;
// ptri = r_affinetridesc.ptriangles;
// lnumtriangles = r_affinetridesc.numtriangles;
LNDLoop:
// for (i=0 ; i<lnumtriangles ; i++, ptri++)
// {
// index0 = pfv + ptri->vertindex[0];
// index1 = pfv + ptri->vertindex[1];
// index2 = pfv + ptri->vertindex[2];
movl C(r_affinetridesc)+atd_pfinalverts,%edi
movl mtri_vertindex+0-mtri_size(%esi,%ebp,1),%ecx
shll $(fv_shift),%ecx
movl mtri_vertindex+4-mtri_size(%esi,%ebp,1),%edx
shll $(fv_shift),%edx
movl mtri_vertindex+8-mtri_size(%esi,%ebp,1),%ebx
shll $(fv_shift),%ebx
addl %edi,%ecx
addl %edi,%edx
addl %edi,%ebx
// d_xdenom = (index0->v[1]-index1->v[1]) *
// (index0->v[0]-index2->v[0]) -
// (index0->v[0]-index1->v[0])*(index0->v[1]-index2->v[1]);
movl fv_v+4(%ecx),%eax
movl fv_v+0(%ecx),%esi
subl fv_v+4(%edx),%eax
subl fv_v+0(%ebx),%esi
imull %esi,%eax
movl fv_v+0(%ecx),%esi
movl fv_v+4(%ecx),%edi
subl fv_v+0(%edx),%esi
subl fv_v+4(%ebx),%edi
imull %esi,%edi
subl %edi,%eax
// if (d_xdenom >= 0)
// {
// continue;
jns LNextTri
// }
movl %eax,C(d_xdenom)
fildl C(d_xdenom)
// r_p0[0] = index0->v[0]; // u
// r_p0[1] = index0->v[1]; // v
// r_p0[2] = index0->v[2]; // s
// r_p0[3] = index0->v[3]; // t
// r_p0[4] = index0->v[4]; // light
// r_p0[5] = index0->v[5]; // iz
movl fv_v+0(%ecx),%eax
movl fv_v+4(%ecx),%esi
movl %eax,C(r_p0)+0
movl %esi,C(r_p0)+4
movl fv_v+8(%ecx),%eax
movl fv_v+12(%ecx),%esi
movl %eax,C(r_p0)+8
movl %esi,C(r_p0)+12
movl fv_v+16(%ecx),%eax
movl fv_v+20(%ecx),%esi
movl %eax,C(r_p0)+16
movl %esi,C(r_p0)+20
fdivrs float_1
// r_p1[0] = index1->v[0];
// r_p1[1] = index1->v[1];
// r_p1[2] = index1->v[2];
// r_p1[3] = index1->v[3];
// r_p1[4] = index1->v[4];
// r_p1[5] = index1->v[5];
movl fv_v+0(%edx),%eax
movl fv_v+4(%edx),%esi
movl %eax,C(r_p1)+0
movl %esi,C(r_p1)+4
movl fv_v+8(%edx),%eax
movl fv_v+12(%edx),%esi
movl %eax,C(r_p1)+8
movl %esi,C(r_p1)+12
movl fv_v+16(%edx),%eax
movl fv_v+20(%edx),%esi
movl %eax,C(r_p1)+16
movl %esi,C(r_p1)+20
// r_p2[0] = index2->v[0];
// r_p2[1] = index2->v[1];
// r_p2[2] = index2->v[2];
// r_p2[3] = index2->v[3];
// r_p2[4] = index2->v[4];
// r_p2[5] = index2->v[5];
movl fv_v+0(%ebx),%eax
movl fv_v+4(%ebx),%esi
movl %eax,C(r_p2)+0
movl %esi,C(r_p2)+4
movl fv_v+8(%ebx),%eax
movl fv_v+12(%ebx),%esi
movl %eax,C(r_p2)+8
movl %esi,C(r_p2)+12
movl fv_v+16(%ebx),%eax
movl fv_v+20(%ebx),%esi
movl %eax,C(r_p2)+16
movl C(r_affinetridesc)+atd_ptriangles,%edi
movl %esi,C(r_p2)+20
movl mtri_facesfront-mtri_size(%edi,%ebp,1),%eax
// if (!ptri->facesfront)
// {
testl %eax,%eax
jnz LFacesFront
// if (index0->flags & ALIAS_ONSEAM)
// r_p0[2] += r_affinetridesc.seamfixupX16;
movl fv_flags(%ecx),%eax
movl fv_flags(%edx),%esi
movl fv_flags(%ebx),%edi
testl $(ALIAS_ONSEAM),%eax
movl C(r_affinetridesc)+atd_seamfixupX16,%eax
jz LOnseamDone0
addl %eax,C(r_p0)+8
LOnseamDone0:
// if (index1->flags & ALIAS_ONSEAM)
// r_p1[2] += r_affinetridesc.seamfixupX16;
testl $(ALIAS_ONSEAM),%esi
jz LOnseamDone1
addl %eax,C(r_p1)+8
LOnseamDone1:
// if (index2->flags & ALIAS_ONSEAM)
// r_p2[2] += r_affinetridesc.seamfixupX16;
testl $(ALIAS_ONSEAM),%edi
jz LOnseamDone2
addl %eax,C(r_p2)+8
LOnseamDone2:
// }
LFacesFront:
fstps C(d_xdenom)
// D_PolysetSetEdgeTable ();
// D_RasterizeAliasPolySmooth ();
call C(D_PolysetSetEdgeTable)
call C(D_RasterizeAliasPolySmooth)
LNextTri:
movl C(r_affinetridesc)+atd_ptriangles,%esi
subl $16,%ebp
jnz LNDLoop
// }
popl %edi
popl %esi
popl %ebx
popl %ebp
addl $(SPAN_SIZE),%esp
ret
#endif // id386
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