e269aeaf16
Small bugfixes. git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@887 fc73d0e0-1445-4013-8a0c-d673dee63da5
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.
|
|
//
|
|
#define SWQUAKE
|
|
#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
|