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c2p_ocsasm.asm
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c2p_ocsasm.asm
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* :ts=8 c2p_ocsasm.asm
*
* cp4 - Commodore C+4 emulator
* Copyright (C) 1998 Gáti Gergely
*
* Chunky2Planar written by Zavacki Ferenc
*
* 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.
*
* e-mail: [email protected]
*
CHUNKY_BUFFER_WIDTH equ 352
CHUNKY_BUFFER_HEIGHT equ 283
*-------------------------------------------------------------------------------
* IN: a0.l - Chunky Buffer Address
* a1.l - Planar Buffer Address
* d0.l - Bitplane Byte Width
xdef _c2pf
_c2pf movem.l d2-d7/a2-a6,-(sp)
move.l a0,(C2P_ChunkyBufferAddress)
move.l a1,(C2P_PlanarBufferAddress)
move.l d0,(C2P_BitplaneByteWidth)
move.l (C2P_ChunkyBufferAddress,pc),a0
move.l (C2P_PlanarBufferAddress,pc),a1
lea (CHUNKY_BUFFER_WIDTH*CHUNKY_BUFFER_HEIGHT,a0),a2
move.l (C2P_BitplaneByteWidth,pc),d7
move.l #$0F0F0F0F,d5
move.l (a0)+,d0
and.l d5,d0
lsl.l #4,d0
move.l (a0)+,d1
and.l d5,d1
or.l d1,d0
move.l (a0)+,d1
and.l d5,d1
lsl.l #4,d1
move.l (a0)+,d2
and.l d5,d2
or.l d2,d1
move.l (a0)+,d2
and.l d5,d2
lsl.l #4,d2
move.l (a0)+,d3
and.l d5,d3
or.l d3,d2
move.l (a0)+,d3
and.l d5,d3
lsl.l #4,d3
move.l (a0)+,d4
and.l d5,d4
or.l d4,d3
move.w d2,d4
move.w d0,d2
swap d2
move.w d2,d0
move.w d4,d2
move.w d3,d4
move.w d1,d3
swap d3
move.w d3,d1
move.w d4,d3
move.l #$00FF00FF,d5
move.l d1,d4
lsr.l #8,d4
eor.l d0,d4
and.l d5,d4
eor.l d4,d0
lsl.l #8,d4
eor.l d4,d1
move.l d3,d4
lsr.l #8,d4
eor.l d2,d4
and.l d5,d4
eor.l d4,d2
lsl.l #8,d4
eor.l d4,d3
move.l #$33333333,d5
move.l d2,d4
lsr.l #2,d4
eor.l d0,d4
and.l d5,d4
eor.l d4,d0
lsl.l #2,d4
eor.l d4,d2
move.l d3,d4
lsr.l #2,d4
eor.l d1,d4
and.l d5,d4
eor.l d4,d1
lsl.l #2,d4
eor.l d4,d3
move.l #$55555555,d5
move.l d1,d4
lsr.l #1,d4
eor.l d0,d4
and.l d5,d4
eor.l d4,d0
lsl.l #1,d4
eor.l d4,d1
move.l d3,d4
lsr.l #1,d4
eor.l d2,d4
and.l d5,d4
eor.l d4,d2
lsl.l #1,d4
eor.l d4,d3
move.l d0,a3
move.l d1,a4
move.l d2,a5
move.l d3,a6
move.l #CHUNKY_BUFFER_WIDTH/32,d6
.1 move.l #$0F0F0F0F,d5
move.l (a0)+,d0
and.l d5,d0
lsl.l #4,d0
move.l (a0)+,d1
and.l d5,d1
or.l d1,d0
move.l (a0)+,d1
and.l d5,d1
lsl.l #4,d1
move.l (a0)+,d2
and.l d5,d2
or.l d2,d1
move.l (a0)+,d2
and.l d5,d2
lsl.l #4,d2
move.l (a0)+,d3
and.l d5,d3
or.l d3,d2
move.l (a0)+,d3
and.l d5,d3
lsl.l #4,d3
move.l (a0)+,d4
and.l d5,d4
or.l d4,d3
move.l a6,(a1)+
move.w d2,d4
move.w d0,d2
swap d2
move.w d2,d0
move.w d4,d2
move.w d3,d4
move.w d1,d3
swap d3
move.w d3,d1
move.w d4,d3
move.l #$00FF00FF,d5
move.l d1,d4
lsr.l #8,d4
eor.l d0,d4
and.l d5,d4
eor.l d4,d0
lsl.l #8,d4
eor.l d4,d1
move.l a5,(-4,a1,d7.l)
move.l d3,d4
lsr.l #8,d4
eor.l d2,d4
and.l d5,d4
eor.l d4,d2
lsl.l #8,d4
eor.l d4,d3
move.l #$33333333,d5
move.l d2,d4
lsr.l #2,d4
eor.l d0,d4
and.l d5,d4
eor.l d4,d0
lsl.l #2,d4
eor.l d4,d2
move.l a4,(-4,a1,d7.l*2)
move.l d3,d4
lsr.l #2,d4
eor.l d1,d4
and.l d5,d4
eor.l d4,d1
lsl.l #2,d4
eor.l d4,d3
move.l #$55555555,d5
move.l d1,d4
lsr.l #1,d4
eor.l d0,d4
and.l d5,d4
eor.l d4,d0
lsl.l #1,d4
eor.l d4,d1
add.l d7,a1
move.l a3,(-4,a1,d7.l*2)
sub.l d7,a1
move.l d3,d4
lsr.l #1,d4
eor.l d2,d4
and.l d5,d4
eor.l d4,d2
lsl.l #1,d4
eor.l d4,d3
move.l d0,a3
move.l d1,a4
move.l d2,a5
move.l d3,a6
sub.l #1,d6
bne .2
move.l #CHUNKY_BUFFER_WIDTH/32,d6
lea (-CHUNKY_BUFFER_WIDTH/8,a1,d7.l*4),a1
.2 cmp.l a2,a0
bne .1
move.l a6,(a1)
move.l a5,(a1,d7.l)
move.l a4,(a1,d7.l*2)
add.l d7,a1
move.l a3,(a1,d7.l*2)
movem.l (sp)+,d2-d7/a2-a6
rts
*-------------------------------------------------------------------------------
* IN: a0.l - Chunky Buffer Address
* a1.l - Delta Buffer Address
* a2.l - Planar Buffer Address
* a3.l - Line Skip Buffer Address
* d0.l - Bitplane Byte Width
xdef _c2pd
_c2pd movem.l d2-d7/a2-a4,-(sp)
move.l a0,(C2P_ChunkyBufferAddress)
move.l a1,(C2P_DeltaBufferAddress)
move.l a2,(C2P_PlanarBufferAddress)
move.l a3,(C2P_LineSkipBufferAddress)
move.l d0,(C2P_BitplaneByteWidth)
move.l (C2P_ChunkyBufferAddress,pc),a0
move.l (C2P_DeltaBufferAddress,pc),a1
move.l (C2P_PlanarBufferAddress,pc),a2
move.l (C2P_LineSkipBufferAddress),a3
lea (CHUNKY_BUFFER_WIDTH*CHUNKY_BUFFER_HEIGHT,a0),a4
move.l (C2P_BitplaneByteWidth,pc),d7
.12 tst.b (a3)+
beq .14
add.l #CHUNKY_BUFFER_WIDTH,a0
add.l #CHUNKY_BUFFER_WIDTH,a1
lea (a2,d7.l*4),a2
bra .13
.14 move.l #CHUNKY_BUFFER_WIDTH/32,d6
.11 cmp.l (a0)+,(a1)+
bne .1
cmp.l (a0)+,(a1)+
bne .2
cmp.l (a0)+,(a1)+
bne .3
cmp.l (a0)+,(a1)+
bne .4
cmp.l (a0)+,(a1)+
bne .5
cmp.l (a0)+,(a1)+
bne .6
cmp.l (a0)+,(a1)+
bne .7
cmp.l (a0)+,(a1)+
bne .8
.10 add.l #4,a2
sub.l #1,d6
bne .11
lea (-CHUNKY_BUFFER_WIDTH/8,a2,d7.l*4),a2
.13 cmp.l a4,a0
bne .12
movem.l (sp)+,d2-d7/a2-a4
rts
.1 sub.l #1*4,a0
add.l #7*4,a1
bra .9
.2 sub.l #2*4,a0
add.l #6*4,a1
bra .9
.3 sub.l #3*4,a0
add.l #5*4,a1
bra .9
.4 sub.l #4*4,a0
add.l #4*4,a1
bra .9
.5 sub.l #5*4,a0
add.l #3*4,a1
bra .9
.6 sub.l #6*4,a0
add.l #2*4,a1
bra .9
.7 sub.l #7*4,a0
add.l #1*4,a1
bra .9
.8 sub.l #8*4,a0
add.l #0*4,a1
bra .9
.9 move.l #$0F0F0F0F,d5
move.l (a0)+,d0
and.l d5,d0
lsl.l #4,d0
move.l (a0)+,d1
and.l d5,d1
or.l d1,d0
move.l (a0)+,d1
and.l d5,d1
lsl.l #4,d1
move.l (a0)+,d2
and.l d5,d2
or.l d2,d1
move.l (a0)+,d2
and.l d5,d2
lsl.l #4,d2
move.l (a0)+,d3
and.l d5,d3
or.l d3,d2
move.l (a0)+,d3
and.l d5,d3
lsl.l #4,d3
move.l (a0)+,d4
and.l d5,d4
or.l d4,d3
move.w d2,d4
move.w d0,d2
swap d2
move.w d2,d0
move.w d4,d2
move.w d3,d4
move.w d1,d3
swap d3
move.w d3,d1
move.w d4,d3
move.l #$00FF00FF,d5
move.l d1,d4
lsr.l #8,d4
eor.l d0,d4
and.l d5,d4
eor.l d4,d0
lsl.l #8,d4
eor.l d4,d1
move.l d3,d4
lsr.l #8,d4
eor.l d2,d4
and.l d5,d4
eor.l d4,d2
lsl.l #8,d4
eor.l d4,d3
move.l #$33333333,d5
move.l d2,d4
lsr.l #2,d4
eor.l d0,d4
and.l d5,d4
eor.l d4,d0
lsl.l #2,d4
eor.l d4,d2
move.l d3,d4
lsr.l #2,d4
eor.l d1,d4
and.l d5,d4
eor.l d4,d1
lsl.l #2,d4
eor.l d4,d3
move.l #$55555555,d5
move.l d1,d4
lsr.l #1,d4
eor.l d0,d4
and.l d5,d4
eor.l d4,d0
add.l d7,a2
move.l d0,(a2,d7.l*2)
sub.l d7,a2
lsl.l #1,d4
eor.l d4,d1
move.l d1,(a2,d7.l*2)
move.l d3,d4
lsr.l #1,d4
eor.l d2,d4
and.l d5,d4
eor.l d4,d2
move.l d2,(a2,d7.l)
lsl.l #1,d4
eor.l d4,d3
move.l d3,(a2)
bra .10
*-------------------------------------------------------------------------------
cnop 0,4
C2P_ChunkyBufferAddress dc.l 0
C2P_DeltaBufferAddress dc.l 0
C2P_PlanarBufferAddress dc.l 0
C2P_LineSkipBufferAddress dc.l 0
C2P_BitplaneByteWidth dc.l 0