mirror of
https://git.code.sf.net/p/quake/quakeforge-old
synced 2024-11-29 15:12:17 +00:00
c3f5581b0a
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.
237 lines
6.9 KiB
ArmAsm
237 lines
6.9 KiB
ArmAsm
/*
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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 the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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//
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// r_aliasa.s
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// x86 assembly-language Alias model transform and project code.
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//
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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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#if id386
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.data
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Lfloat_1: .single 1.0
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Ltemp: .long 0
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Lcoords: .long 0, 0, 0
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.text
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#define fv 12+4
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#define pstverts 12+8
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.globl C(R_AliasTransformAndProjectFinalVerts)
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C(R_AliasTransformAndProjectFinalVerts):
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pushl %ebp // preserve caller's stack frame
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pushl %edi
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pushl %esi // preserve register variables
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// int i, temp;
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// float lightcos, *plightnormal, zi;
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// trivertx_t *pverts;
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// pverts = r_apverts;
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movl C(r_apverts),%esi
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// for (i=0 ; i<r_anumverts ; i++, fv++, pverts++, pstverts++)
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// {
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movl pstverts(%esp),%ebp
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movl fv(%esp),%edi
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movl C(r_anumverts),%ecx
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subl %edx,%edx
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Lloop:
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// // transform and project
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// zi = 1.0 / (DotProduct(pverts->v, aliastransform[2]) +
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// aliastransform[2][3]);
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movb (%esi),%dl
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movb %dl,Lcoords
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fildl Lcoords // v[0]
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movb 1(%esi),%dl
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movb %dl,Lcoords+4
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fildl Lcoords+4 // v[1] | v[0]
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movb 2(%esi),%dl
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movb %dl,Lcoords+8
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fildl Lcoords+8 // v[2] | v[1] | v[0]
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fld %st(2) // v[0] | v[2] | v[1] | v[0]
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fmuls C(aliastransform)+32 // accum | v[2] | v[1] | v[0]
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fld %st(2) // v[1] | accum | v[2] | v[1] | v[0]
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fmuls C(aliastransform)+36 // accum2 | accum | v[2] | v[1] | v[0]
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fxch %st(1) // accum | accum2 | v[2] | v[1] | v[0]
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fadds C(aliastransform)+44 // accum | accum2 | v[2] | v[1] | v[0]
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fld %st(2) // v[2] | accum | accum2 | v[2] | v[1] | v[0]
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fmuls C(aliastransform)+40 // accum3 | accum | accum2 | v[2] | v[1] |
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// v[0]
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fxch %st(1) // accum | accum3 | accum2 | v[2] | v[1] | v[0]
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faddp %st(0),%st(2) // accum3 | accum | v[2] | v[1] | v[0]
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movb tv_lightnormalindex(%esi),%dl
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movl stv_s(%ebp),%eax
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movl %eax,fv_v+8(%edi)
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faddp %st(0),%st(1) // z | v[2] | v[1] | v[0]
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movl stv_t(%ebp),%eax
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movl %eax,fv_v+12(%edi)
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// // lighting
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// plightnormal = r_avertexnormals[pverts->lightnormalindex];
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fdivrs Lfloat_1 // zi | v[2] | v[1] | v[0]
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// fv->v[2] = pstverts->s;
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// fv->v[3] = pstverts->t;
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// fv->flags = pstverts->onseam;
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movl stv_onseam(%ebp),%eax
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movl %eax,fv_flags(%edi)
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movl fv_size(%edi),%eax
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movl stv_size(%ebp),%eax
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movl 4(%esi),%eax
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leal (%edx,%edx,2),%eax // index*3
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fxch %st(3) // v[0] | v[2] | v[1] | zi
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// lightcos = DotProduct (plightnormal, r_plightvec);
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flds C(r_avertexnormals)(,%eax,4)
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fmuls C(r_plightvec)
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flds C(r_avertexnormals)+4(,%eax,4)
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fmuls C(r_plightvec)+4
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flds C(r_avertexnormals)+8(,%eax,4)
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fmuls C(r_plightvec)+8
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fxch %st(1)
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faddp %st(0),%st(2)
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fld %st(2) // v[0] | laccum | laccum2 | v[0] | v[2] |
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// v[1] | zi
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fmuls C(aliastransform)+0 // xaccum | laccum | laccum2 | v[0] | v[2] |
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// v[1] | zi
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fxch %st(2) // laccum2 | laccum | xaccum | v[0] | v[2] |
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// v[1] | zi
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faddp %st(0),%st(1) // laccum | xaccum | v[0] | v[2] | v[1] | zi
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// temp = r_ambientlight;
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// if (lightcos < 0)
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// {
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fsts Ltemp
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movl C(r_ambientlight),%eax
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movb Ltemp+3,%dl
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testb $0x80,%dl
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jz Lsavelight // no need to clamp if only ambient lit, because
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// r_ambientlight is preclamped
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// temp += (int)(r_shadelight * lightcos);
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fmuls C(r_shadelight)
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// FIXME: fast float->int conversion?
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fistpl Ltemp
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addl Ltemp,%eax
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// // clamp; because we limited the minimum ambient and shading light, we
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// // don't have to clamp low light, just bright
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// if (temp < 0)
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// temp = 0;
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jns Lp1
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subl %eax,%eax
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// }
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Lp1:
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// fv->v[4] = temp;
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//
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// // x, y, and z are scaled down by 1/2**31 in the transform, so 1/z is
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// // scaled up by 1/2**31, and the scaling cancels out for x and y in the
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// // projection
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// fv->v[0] = ((DotProduct(pverts->v, aliastransform[0]) +
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// aliastransform[0][3]) * zi) + aliasxcenter;
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// fv->v[1] = ((DotProduct(pverts->v, aliastransform[1]) +
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// aliastransform[1][3]) * zi) + aliasycenter;
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// fv->v[5] = zi;
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fxch %st(1) // v[0] | xaccum | v[2] | v[1] | zi
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fmuls C(aliastransform)+16 // yaccum | xaccum | v[2] | v[1] | zi
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fxch %st(3) // v[1] | xaccum | v[2] | yaccum | zi
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fld %st(0) // v[1] | v[1] | xaccum | v[2] | yaccum | zi
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fmuls C(aliastransform)+4 // xaccum2 | v[1] | xaccum | v[2] | yaccum |zi
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fxch %st(1) // v[1] | xaccum2 | xaccum | v[2] | yaccum |zi
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movl %eax,fv_v+16(%edi)
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fmuls C(aliastransform)+20 // yaccum2 | xaccum2 | xaccum | v[2] | yaccum|
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// zi
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fxch %st(2) // xaccum | xaccum2 | yaccum2 | v[2] | yaccum|
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// zi
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fadds C(aliastransform)+12 // xaccum | xaccum2 | yaccum2 | v[2] | yaccum|
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// zi
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fxch %st(4) // yaccum | xaccum2 | yaccum2 | v[2] | xaccum|
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// zi
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fadds C(aliastransform)+28 // yaccum | xaccum2 | yaccum2 | v[2] | xaccum|
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// zi
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fxch %st(3) // v[2] | xaccum2 | yaccum2 | yaccum | xaccum|
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// zi
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fld %st(0) // v[2] | v[2] | xaccum2 | yaccum2 | yaccum |
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// xaccum | zi
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fmuls C(aliastransform)+8 // xaccum3 | v[2] | xaccum2 | yaccum2 |yaccum|
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// xaccum | zi
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fxch %st(1) // v[2] | xaccum3 | xaccum2 | yaccum2 |yaccum|
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// xaccum | zi
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fmuls C(aliastransform)+24 // yaccum3 | xaccum3 | xaccum2 | yaccum2 |
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// yaccum | xaccum | zi
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fxch %st(5) // xaccum | xaccum3 | xaccum2 | yaccum2 |
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// yaccum | yaccum3 | zi
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faddp %st(0),%st(2) // xaccum3 | xaccum | yaccum2 | yaccum |
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// yaccum3 | zi
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fxch %st(3) // yaccum | xaccum | yaccum2 | xaccum3 |
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// yaccum3 | zi
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faddp %st(0),%st(2) // xaccum | yaccum | xaccum3 | yaccum3 | zi
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addl $(tv_size),%esi
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faddp %st(0),%st(2) // yaccum | x | yaccum3 | zi
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faddp %st(0),%st(2) // x | y | zi
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addl $(stv_size),%ebp
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fmul %st(2),%st(0) // x/z | y | zi
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fxch %st(1) // y | x/z | zi
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fmul %st(2),%st(0) // y/z | x/z | zi
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fxch %st(1) // x/z | y/z | zi
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fadds C(aliasxcenter) // u | y/z | zi
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fxch %st(1) // y/z | u | zi
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fadds C(aliasycenter) // v | u | zi
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fxch %st(2) // zi | u | v
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// FIXME: fast float->int conversion?
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fistpl fv_v+20(%edi) // u | v
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fistpl fv_v+0(%edi) // v
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fistpl fv_v+4(%edi)
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// }
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addl $(fv_size),%edi
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decl %ecx
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jnz Lloop
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popl %esi // restore register variables
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popl %edi
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popl %ebp // restore the caller's stack frame
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ret
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Lsavelight:
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fstp %st(0)
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jmp Lp1
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#endif // id386
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