mirror of
https://git.code.sf.net/p/quake/quakeforge-old
synced 2024-11-13 07:47:46 +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.
477 lines
9.9 KiB
ArmAsm
477 lines
9.9 KiB
ArmAsm
/*
|
|
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_parta.s
|
|
// x86 assembly-language 8-bpp particle-drawing code.
|
|
//
|
|
|
|
#include "asm_i386.h"
|
|
#include "quakeasm.h"
|
|
#include "d_ifacea.h"
|
|
#include "asm_draw.h"
|
|
|
|
#if id386
|
|
|
|
//----------------------------------------------------------------------
|
|
// 8-bpp particle drawing code.
|
|
//----------------------------------------------------------------------
|
|
|
|
//FIXME: comments, full optimization
|
|
|
|
//----------------------------------------------------------------------
|
|
// 8-bpp particle queueing code.
|
|
//----------------------------------------------------------------------
|
|
|
|
.text
|
|
|
|
#define P 12+4
|
|
|
|
.align 4
|
|
.globl C(D_DrawParticle)
|
|
C(D_DrawParticle):
|
|
pushl %ebp // preserve caller's stack frame
|
|
pushl %edi // preserve register variables
|
|
pushl %ebx
|
|
|
|
movl P(%esp),%edi
|
|
|
|
// FIXME: better FP overlap in general here
|
|
|
|
// transform point
|
|
// VectorSubtract (p->org, r_origin, local);
|
|
flds C(r_origin)
|
|
fsubrs pt_org(%edi)
|
|
flds pt_org+4(%edi)
|
|
fsubs C(r_origin)+4
|
|
flds pt_org+8(%edi)
|
|
fsubs C(r_origin)+8
|
|
fxch %st(2) // local[0] | local[1] | local[2]
|
|
|
|
// transformed[2] = DotProduct(local, r_ppn);
|
|
flds C(r_ppn) // r_ppn[0] | local[0] | local[1] | local[2]
|
|
fmul %st(1),%st(0) // dot0 | local[0] | local[1] | local[2]
|
|
flds C(r_ppn)+4 // r_ppn[1] | dot0 | local[0] | local[1] | local[2]
|
|
fmul %st(3),%st(0) // dot1 | dot0 | local[0] | local[1] | local[2]
|
|
flds C(r_ppn)+8 // r_ppn[2] | dot1 | dot0 | local[0] |
|
|
// local[1] | local[2]
|
|
fmul %st(5),%st(0) // dot2 | dot1 | dot0 | local[0] | local[1] | local[2]
|
|
fxch %st(2) // dot0 | dot1 | dot2 | local[0] | local[1] | local[2]
|
|
faddp %st(0),%st(1) // dot0 + dot1 | dot2 | local[0] | local[1] |
|
|
// local[2]
|
|
faddp %st(0),%st(1) // z | local[0] | local[1] | local[2]
|
|
fld %st(0) // z | z | local[0] | local[1] |
|
|
// local[2]
|
|
fdivrs float_1 // 1/z | z | local[0] | local[1] | local[2]
|
|
fxch %st(1) // z | 1/z | local[0] | local[1] | local[2]
|
|
|
|
// if (transformed[2] < PARTICLE_Z_CLIP)
|
|
// return;
|
|
fcomps float_particle_z_clip // 1/z | local[0] | local[1] | local[2]
|
|
fxch %st(3) // local[2] | local[0] | local[1] | 1/z
|
|
|
|
flds C(r_pup) // r_pup[0] | local[2] | local[0] | local[1] | 1/z
|
|
fmul %st(2),%st(0) // dot0 | local[2] | local[0] | local[1] | 1/z
|
|
flds C(r_pup)+4 // r_pup[1] | dot0 | local[2] | local[0] |
|
|
// local[1] | 1/z
|
|
|
|
fnstsw %ax
|
|
testb $1,%ah
|
|
jnz LPop6AndDone
|
|
|
|
// transformed[1] = DotProduct(local, r_pup);
|
|
fmul %st(4),%st(0) // dot1 | dot0 | local[2] | local[0] | local[1] | 1/z
|
|
flds C(r_pup)+8 // r_pup[2] | dot1 | dot0 | local[2] |
|
|
// local[0] | local[1] | 1/z
|
|
fmul %st(3),%st(0) // dot2 | dot1 | dot0 | local[2] | local[0] |
|
|
// local[1] | 1/z
|
|
fxch %st(2) // dot0 | dot1 | dot2 | local[2] | local[0] |
|
|
// local[1] | 1/z
|
|
faddp %st(0),%st(1) // dot0 + dot1 | dot2 | local[2] | local[0] |
|
|
// local[1] | 1/z
|
|
faddp %st(0),%st(1) // y | local[2] | local[0] | local[1] | 1/z
|
|
fxch %st(3) // local[1] | local[2] | local[0] | y | 1/z
|
|
|
|
// transformed[0] = DotProduct(local, r_pright);
|
|
fmuls C(r_pright)+4 // dot1 | local[2] | local[0] | y | 1/z
|
|
fxch %st(2) // local[0] | local[2] | dot1 | y | 1/z
|
|
fmuls C(r_pright) // dot0 | local[2] | dot1 | y | 1/z
|
|
fxch %st(1) // local[2] | dot0 | dot1 | y | 1/z
|
|
fmuls C(r_pright)+8 // dot2 | dot0 | dot1 | y | 1/z
|
|
fxch %st(2) // dot1 | dot0 | dot2 | y | 1/z
|
|
faddp %st(0),%st(1) // dot1 + dot0 | dot2 | y | 1/z
|
|
|
|
faddp %st(0),%st(1) // x | y | 1/z
|
|
fxch %st(1) // y | x | 1/z
|
|
|
|
// project the point
|
|
fmul %st(2),%st(0) // y/z | x | 1/z
|
|
fxch %st(1) // x | y/z | 1/z
|
|
fmul %st(2),%st(0) // x/z | y/z | 1/z
|
|
fxch %st(1) // y/z | x/z | 1/z
|
|
fsubrs C(ycenter) // v | x/z | 1/z
|
|
fxch %st(1) // x/z | v | 1/z
|
|
fadds C(xcenter) // u | v | 1/z
|
|
// FIXME: preadjust xcenter and ycenter
|
|
fxch %st(1) // v | u | 1/z
|
|
fadds float_point5 // v | u | 1/z
|
|
fxch %st(1) // u | v | 1/z
|
|
fadds float_point5 // u | v | 1/z
|
|
fxch %st(2) // 1/z | v | u
|
|
fmuls DP_32768 // 1/z * 0x8000 | v | u
|
|
fxch %st(2) // u | v | 1/z * 0x8000
|
|
|
|
// FIXME: use Terje's fp->int trick here?
|
|
// FIXME: check we're getting proper rounding here
|
|
fistpl DP_u // v | 1/z * 0x8000
|
|
fistpl DP_v // 1/z * 0x8000
|
|
|
|
movl DP_u,%eax
|
|
movl DP_v,%edx
|
|
|
|
// if ((v > d_vrectbottom_particle) ||
|
|
// (u > d_vrectright_particle) ||
|
|
// (v < d_vrecty) ||
|
|
// (u < d_vrectx))
|
|
// {
|
|
// continue;
|
|
// }
|
|
|
|
movl C(d_vrectbottom_particle),%ebx
|
|
movl C(d_vrectright_particle),%ecx
|
|
cmpl %ebx,%edx
|
|
jg LPop1AndDone
|
|
cmpl %ecx,%eax
|
|
jg LPop1AndDone
|
|
movl C(d_vrecty),%ebx
|
|
movl C(d_vrectx),%ecx
|
|
cmpl %ebx,%edx
|
|
jl LPop1AndDone
|
|
|
|
cmpl %ecx,%eax
|
|
jl LPop1AndDone
|
|
|
|
flds pt_color(%edi) // color | 1/z * 0x8000
|
|
// FIXME: use Terje's fast fp->int trick?
|
|
fistpl DP_Color // 1/z * 0x8000
|
|
|
|
movl C(d_viewbuffer),%ebx
|
|
|
|
addl %eax,%ebx
|
|
movl C(d_scantable)(,%edx,4),%edi // point to the pixel
|
|
|
|
imull C(d_zrowbytes),%edx // point to the z pixel
|
|
|
|
leal (%edx,%eax,2),%edx
|
|
movl C(d_pzbuffer),%eax
|
|
|
|
fistpl izi
|
|
|
|
addl %ebx,%edi
|
|
addl %eax,%edx
|
|
|
|
// pix = izi >> d_pix_shift;
|
|
|
|
movl izi,%eax
|
|
movl C(d_pix_shift),%ecx
|
|
shrl %cl,%eax
|
|
movl izi,%ebp
|
|
|
|
// if (pix < d_pix_min)
|
|
// pix = d_pix_min;
|
|
// else if (pix > d_pix_max)
|
|
// pix = d_pix_max;
|
|
|
|
movl C(d_pix_min),%ebx
|
|
movl C(d_pix_max),%ecx
|
|
cmpl %ebx,%eax
|
|
jnl LTestPixMax
|
|
movl %ebx,%eax
|
|
jmp LTestDone
|
|
|
|
LTestPixMax:
|
|
cmpl %ecx,%eax
|
|
jng LTestDone
|
|
movl %ecx,%eax
|
|
LTestDone:
|
|
|
|
movb DP_Color,%ch
|
|
|
|
movl C(d_y_aspect_shift),%ebx
|
|
testl %ebx,%ebx
|
|
jnz LDefault
|
|
|
|
cmpl $4,%eax
|
|
ja LDefault
|
|
|
|
jmp *DP_EntryTable-4(,%eax,4)
|
|
|
|
// 1x1
|
|
.globl DP_1x1
|
|
DP_1x1:
|
|
cmpw %bp,(%edx) // just one pixel to do
|
|
jg LDone
|
|
movw %bp,(%edx)
|
|
movb %ch,(%edi)
|
|
jmp LDone
|
|
|
|
// 2x2
|
|
.globl DP_2x2
|
|
DP_2x2:
|
|
pushl %esi
|
|
movl C(screenwidth),%ebx
|
|
movl C(d_zrowbytes),%esi
|
|
|
|
cmpw %bp,(%edx)
|
|
jg L2x2_1
|
|
movw %bp,(%edx)
|
|
movb %ch,(%edi)
|
|
L2x2_1:
|
|
cmpw %bp,2(%edx)
|
|
jg L2x2_2
|
|
movw %bp,2(%edx)
|
|
movb %ch,1(%edi)
|
|
L2x2_2:
|
|
cmpw %bp,(%edx,%esi,1)
|
|
jg L2x2_3
|
|
movw %bp,(%edx,%esi,1)
|
|
movb %ch,(%edi,%ebx,1)
|
|
L2x2_3:
|
|
cmpw %bp,2(%edx,%esi,1)
|
|
jg L2x2_4
|
|
movw %bp,2(%edx,%esi,1)
|
|
movb %ch,1(%edi,%ebx,1)
|
|
L2x2_4:
|
|
|
|
popl %esi
|
|
jmp LDone
|
|
|
|
// 3x3
|
|
.globl DP_3x3
|
|
DP_3x3:
|
|
pushl %esi
|
|
movl C(screenwidth),%ebx
|
|
movl C(d_zrowbytes),%esi
|
|
|
|
cmpw %bp,(%edx)
|
|
jg L3x3_1
|
|
movw %bp,(%edx)
|
|
movb %ch,(%edi)
|
|
L3x3_1:
|
|
cmpw %bp,2(%edx)
|
|
jg L3x3_2
|
|
movw %bp,2(%edx)
|
|
movb %ch,1(%edi)
|
|
L3x3_2:
|
|
cmpw %bp,4(%edx)
|
|
jg L3x3_3
|
|
movw %bp,4(%edx)
|
|
movb %ch,2(%edi)
|
|
L3x3_3:
|
|
|
|
cmpw %bp,(%edx,%esi,1)
|
|
jg L3x3_4
|
|
movw %bp,(%edx,%esi,1)
|
|
movb %ch,(%edi,%ebx,1)
|
|
L3x3_4:
|
|
cmpw %bp,2(%edx,%esi,1)
|
|
jg L3x3_5
|
|
movw %bp,2(%edx,%esi,1)
|
|
movb %ch,1(%edi,%ebx,1)
|
|
L3x3_5:
|
|
cmpw %bp,4(%edx,%esi,1)
|
|
jg L3x3_6
|
|
movw %bp,4(%edx,%esi,1)
|
|
movb %ch,2(%edi,%ebx,1)
|
|
L3x3_6:
|
|
|
|
cmpw %bp,(%edx,%esi,2)
|
|
jg L3x3_7
|
|
movw %bp,(%edx,%esi,2)
|
|
movb %ch,(%edi,%ebx,2)
|
|
L3x3_7:
|
|
cmpw %bp,2(%edx,%esi,2)
|
|
jg L3x3_8
|
|
movw %bp,2(%edx,%esi,2)
|
|
movb %ch,1(%edi,%ebx,2)
|
|
L3x3_8:
|
|
cmpw %bp,4(%edx,%esi,2)
|
|
jg L3x3_9
|
|
movw %bp,4(%edx,%esi,2)
|
|
movb %ch,2(%edi,%ebx,2)
|
|
L3x3_9:
|
|
|
|
popl %esi
|
|
jmp LDone
|
|
|
|
|
|
// 4x4
|
|
.globl DP_4x4
|
|
DP_4x4:
|
|
pushl %esi
|
|
movl C(screenwidth),%ebx
|
|
movl C(d_zrowbytes),%esi
|
|
|
|
cmpw %bp,(%edx)
|
|
jg L4x4_1
|
|
movw %bp,(%edx)
|
|
movb %ch,(%edi)
|
|
L4x4_1:
|
|
cmpw %bp,2(%edx)
|
|
jg L4x4_2
|
|
movw %bp,2(%edx)
|
|
movb %ch,1(%edi)
|
|
L4x4_2:
|
|
cmpw %bp,4(%edx)
|
|
jg L4x4_3
|
|
movw %bp,4(%edx)
|
|
movb %ch,2(%edi)
|
|
L4x4_3:
|
|
cmpw %bp,6(%edx)
|
|
jg L4x4_4
|
|
movw %bp,6(%edx)
|
|
movb %ch,3(%edi)
|
|
L4x4_4:
|
|
|
|
cmpw %bp,(%edx,%esi,1)
|
|
jg L4x4_5
|
|
movw %bp,(%edx,%esi,1)
|
|
movb %ch,(%edi,%ebx,1)
|
|
L4x4_5:
|
|
cmpw %bp,2(%edx,%esi,1)
|
|
jg L4x4_6
|
|
movw %bp,2(%edx,%esi,1)
|
|
movb %ch,1(%edi,%ebx,1)
|
|
L4x4_6:
|
|
cmpw %bp,4(%edx,%esi,1)
|
|
jg L4x4_7
|
|
movw %bp,4(%edx,%esi,1)
|
|
movb %ch,2(%edi,%ebx,1)
|
|
L4x4_7:
|
|
cmpw %bp,6(%edx,%esi,1)
|
|
jg L4x4_8
|
|
movw %bp,6(%edx,%esi,1)
|
|
movb %ch,3(%edi,%ebx,1)
|
|
L4x4_8:
|
|
|
|
leal (%edx,%esi,2),%edx
|
|
leal (%edi,%ebx,2),%edi
|
|
|
|
cmpw %bp,(%edx)
|
|
jg L4x4_9
|
|
movw %bp,(%edx)
|
|
movb %ch,(%edi)
|
|
L4x4_9:
|
|
cmpw %bp,2(%edx)
|
|
jg L4x4_10
|
|
movw %bp,2(%edx)
|
|
movb %ch,1(%edi)
|
|
L4x4_10:
|
|
cmpw %bp,4(%edx)
|
|
jg L4x4_11
|
|
movw %bp,4(%edx)
|
|
movb %ch,2(%edi)
|
|
L4x4_11:
|
|
cmpw %bp,6(%edx)
|
|
jg L4x4_12
|
|
movw %bp,6(%edx)
|
|
movb %ch,3(%edi)
|
|
L4x4_12:
|
|
|
|
cmpw %bp,(%edx,%esi,1)
|
|
jg L4x4_13
|
|
movw %bp,(%edx,%esi,1)
|
|
movb %ch,(%edi,%ebx,1)
|
|
L4x4_13:
|
|
cmpw %bp,2(%edx,%esi,1)
|
|
jg L4x4_14
|
|
movw %bp,2(%edx,%esi,1)
|
|
movb %ch,1(%edi,%ebx,1)
|
|
L4x4_14:
|
|
cmpw %bp,4(%edx,%esi,1)
|
|
jg L4x4_15
|
|
movw %bp,4(%edx,%esi,1)
|
|
movb %ch,2(%edi,%ebx,1)
|
|
L4x4_15:
|
|
cmpw %bp,6(%edx,%esi,1)
|
|
jg L4x4_16
|
|
movw %bp,6(%edx,%esi,1)
|
|
movb %ch,3(%edi,%ebx,1)
|
|
L4x4_16:
|
|
|
|
popl %esi
|
|
jmp LDone
|
|
|
|
// default case, handling any size particle
|
|
LDefault:
|
|
|
|
// count = pix << d_y_aspect_shift;
|
|
|
|
movl %eax,%ebx
|
|
movl %eax,DP_Pix
|
|
movb C(d_y_aspect_shift),%cl
|
|
shll %cl,%ebx
|
|
|
|
// for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth)
|
|
// {
|
|
// for (i=0 ; i<pix ; i++)
|
|
// {
|
|
// if (pz[i] <= izi)
|
|
// {
|
|
// pz[i] = izi;
|
|
// pdest[i] = color;
|
|
// }
|
|
// }
|
|
// }
|
|
|
|
LGenRowLoop:
|
|
movl DP_Pix,%eax
|
|
|
|
LGenColLoop:
|
|
cmpw %bp,-2(%edx,%eax,2)
|
|
jg LGSkip
|
|
movw %bp,-2(%edx,%eax,2)
|
|
movb %ch,-1(%edi,%eax,1)
|
|
LGSkip:
|
|
decl %eax // --pix
|
|
jnz LGenColLoop
|
|
|
|
addl C(d_zrowbytes),%edx
|
|
addl C(screenwidth),%edi
|
|
|
|
decl %ebx // --count
|
|
jnz LGenRowLoop
|
|
|
|
LDone:
|
|
popl %ebx // restore register variables
|
|
popl %edi
|
|
popl %ebp // restore the caller's stack frame
|
|
ret
|
|
|
|
LPop6AndDone:
|
|
fstp %st(0)
|
|
fstp %st(0)
|
|
fstp %st(0)
|
|
fstp %st(0)
|
|
fstp %st(0)
|
|
LPop1AndDone:
|
|
fstp %st(0)
|
|
jmp LDone
|
|
|
|
#endif // id386
|