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rockbox/firmware/target/coldfire/iaudio/m5/lcd-as-m5.S

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Bring up the M5 port to a working stage: Extended numerous explicit checks for IAUDIO_X5 to also check for IAUDIO_M5, moved code around the target tree, added preliminary background for the sim. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12610 a1c6a512-1295-4272-9138-f99709370657
2007-03-05 00:04:00 +00:00
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2007 by Jens Arnold
*
Updated our source code header to explicitly mention that we are GPL v2 or later. We still need to hunt down snippets used that are not. 1324 modified files... http://www.rockbox.org/mail/archive/rockbox-dev-archive-2008-06/0060.shtml git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17847 a1c6a512-1295-4272-9138-f99709370657
2008-06-28 18:10:04 +00:00
* 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.
Bring up the M5 port to a working stage: Extended numerous explicit checks for IAUDIO_X5 to also check for IAUDIO_M5, moved code around the target tree, added preliminary background for the sim. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12610 a1c6a512-1295-4272-9138-f99709370657
2007-03-05 00:04:00 +00:00
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "cpu.h"
.section .icode,"ax",@progbits
.align 2
.global lcd_write_command
.type lcd_write_command,@function
lcd_write_command:
move.l (4, %sp), %d0
move.w %d0, 0xf0008000
rts
.wc_end:
.size lcd_write_command,.wc_end-lcd_write_command
.align 2
.global lcd_write_command_ex
.type lcd_write_command_ex,@function
lcd_write_command_ex:
lea.l 0xf0008000, %a0
All-new greyscale library, replacing the old one. Features: (1) Drawing/updating is faster than the old grayscale lib at full depth. (2) Always 129 shades instead of 2..33 shades. (3) No graininess caused by frequent updates (mpegplayer, doom, ...). (4) Needs less memory than the old grayscale lib at full depth. * The tradeoff is slightly higher CPU load in the ISR (frames are calculated 'live') and an extra function in the core. * Ported all plugins which used the graylib to use the new one. * Some slight optimisations for archos and H1x0 LCD update. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15998 a1c6a512-1295-4272-9138-f99709370657
2008-01-04 23:42:38 +00:00
move.l (4, %sp), %d0 /* Command */
move.w %d0, (%a0)+ /* Write to LCD, set A0 = 1 */
Bring up the M5 port to a working stage: Extended numerous explicit checks for IAUDIO_X5 to also check for IAUDIO_M5, moved code around the target tree, added preliminary background for the sim. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12610 a1c6a512-1295-4272-9138-f99709370657
2007-03-05 00:04:00 +00:00
All-new greyscale library, replacing the old one. Features: (1) Drawing/updating is faster than the old grayscale lib at full depth. (2) Always 129 shades instead of 2..33 shades. (3) No graininess caused by frequent updates (mpegplayer, doom, ...). (4) Needs less memory than the old grayscale lib at full depth. * The tradeoff is slightly higher CPU load in the ISR (frames are calculated 'live') and an extra function in the core. * Ported all plugins which used the graylib to use the new one. * Some slight optimisations for archos and H1x0 LCD update. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15998 a1c6a512-1295-4272-9138-f99709370657
2008-01-04 23:42:38 +00:00
move.l (8, %sp), %d0 /* Data */
cmp.l #-1, %d0 /* -1? */
Bring up the M5 port to a working stage: Extended numerous explicit checks for IAUDIO_X5 to also check for IAUDIO_M5, moved code around the target tree, added preliminary background for the sim. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12610 a1c6a512-1295-4272-9138-f99709370657
2007-03-05 00:04:00 +00:00
beq.b .last
All-new greyscale library, replacing the old one. Features: (1) Drawing/updating is faster than the old grayscale lib at full depth. (2) Always 129 shades instead of 2..33 shades. (3) No graininess caused by frequent updates (mpegplayer, doom, ...). (4) Needs less memory than the old grayscale lib at full depth. * The tradeoff is slightly higher CPU load in the ISR (frames are calculated 'live') and an extra function in the core. * Ported all plugins which used the graylib to use the new one. * Some slight optimisations for archos and H1x0 LCD update. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15998 a1c6a512-1295-4272-9138-f99709370657
2008-01-04 23:42:38 +00:00
move.w %d0, (%a0) /* Write to LCD */
Bring up the M5 port to a working stage: Extended numerous explicit checks for IAUDIO_X5 to also check for IAUDIO_M5, moved code around the target tree, added preliminary background for the sim. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12610 a1c6a512-1295-4272-9138-f99709370657
2007-03-05 00:04:00 +00:00
All-new greyscale library, replacing the old one. Features: (1) Drawing/updating is faster than the old grayscale lib at full depth. (2) Always 129 shades instead of 2..33 shades. (3) No graininess caused by frequent updates (mpegplayer, doom, ...). (4) Needs less memory than the old grayscale lib at full depth. * The tradeoff is slightly higher CPU load in the ISR (frames are calculated 'live') and an extra function in the core. * Ported all plugins which used the graylib to use the new one. * Some slight optimisations for archos and H1x0 LCD update. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15998 a1c6a512-1295-4272-9138-f99709370657
2008-01-04 23:42:38 +00:00
move.l (12, %sp), %d0 /* Data */
cmp.l #-1, %d0 /* -1? */
Bring up the M5 port to a working stage: Extended numerous explicit checks for IAUDIO_X5 to also check for IAUDIO_M5, moved code around the target tree, added preliminary background for the sim. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12610 a1c6a512-1295-4272-9138-f99709370657
2007-03-05 00:04:00 +00:00
beq.b .last
All-new greyscale library, replacing the old one. Features: (1) Drawing/updating is faster than the old grayscale lib at full depth. (2) Always 129 shades instead of 2..33 shades. (3) No graininess caused by frequent updates (mpegplayer, doom, ...). (4) Needs less memory than the old grayscale lib at full depth. * The tradeoff is slightly higher CPU load in the ISR (frames are calculated 'live') and an extra function in the core. * Ported all plugins which used the graylib to use the new one. * Some slight optimisations for archos and H1x0 LCD update. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15998 a1c6a512-1295-4272-9138-f99709370657
2008-01-04 23:42:38 +00:00
move.w %d0, (%a0) /* Write to LCD */
Bring up the M5 port to a working stage: Extended numerous explicit checks for IAUDIO_X5 to also check for IAUDIO_M5, moved code around the target tree, added preliminary background for the sim. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12610 a1c6a512-1295-4272-9138-f99709370657
2007-03-05 00:04:00 +00:00
.last:
rts
.wcex_end:
.size lcd_write_command_ex,.wcex_end-lcd_write_command_ex
.align 2
.global lcd_write_data
.type lcd_write_data,@function
lcd_write_data:
All-new greyscale library, replacing the old one. Features: (1) Drawing/updating is faster than the old grayscale lib at full depth. (2) Always 129 shades instead of 2..33 shades. (3) No graininess caused by frequent updates (mpegplayer, doom, ...). (4) Needs less memory than the old grayscale lib at full depth. * The tradeoff is slightly higher CPU load in the ISR (frames are calculated 'live') and an extra function in the core. * Ported all plugins which used the graylib to use the new one. * Some slight optimisations for archos and H1x0 LCD update. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15998 a1c6a512-1295-4272-9138-f99709370657
2008-01-04 23:42:38 +00:00
movem.l (4, %sp), %a0-%a1 /* Data pointer */
move.l %a1, %d0 /* Length */
Bring up the M5 port to a working stage: Extended numerous explicit checks for IAUDIO_X5 to also check for IAUDIO_M5, moved code around the target tree, added preliminary background for the sim. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12610 a1c6a512-1295-4272-9138-f99709370657
2007-03-05 00:04:00 +00:00
lea 0xf0008002, %a1
All-new greyscale library, replacing the old one. Features: (1) Drawing/updating is faster than the old grayscale lib at full depth. (2) Always 129 shades instead of 2..33 shades. (3) No graininess caused by frequent updates (mpegplayer, doom, ...). (4) Needs less memory than the old grayscale lib at full depth. * The tradeoff is slightly higher CPU load in the ISR (frames are calculated 'live') and an extra function in the core. * Ported all plugins which used the graylib to use the new one. * Some slight optimisations for archos and H1x0 LCD update. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15998 a1c6a512-1295-4272-9138-f99709370657
2008-01-04 23:42:38 +00:00
Bring up the M5 port to a working stage: Extended numerous explicit checks for IAUDIO_X5 to also check for IAUDIO_M5, moved code around the target tree, added preliminary background for the sim. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12610 a1c6a512-1295-4272-9138-f99709370657
2007-03-05 00:04:00 +00:00
.loop:
Coldfire targets: enable buffered writes by default. Speeds up all sorts of I/O that writes to ports: LCD update (except the functions using DMA on H300), ATA writes, .... Some timings had to be adjusted for the new configuration. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15129 a1c6a512-1295-4272-9138-f99709370657
2007-10-15 21:16:50 +00:00
/* When running in IRAM, this loop takes 10 cycles plus the LCD write.
The 10 cycles are necessary to follow the LCD timing specs
Bring up the M5 port to a working stage: Extended numerous explicit checks for IAUDIO_X5 to also check for IAUDIO_M5, moved code around the target tree, added preliminary background for the sim. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12610 a1c6a512-1295-4272-9138-f99709370657
2007-03-05 00:04:00 +00:00
at 140MHz */
All-new greyscale library, replacing the old one. Features: (1) Drawing/updating is faster than the old grayscale lib at full depth. (2) Always 129 shades instead of 2..33 shades. (3) No graininess caused by frequent updates (mpegplayer, doom, ...). (4) Needs less memory than the old grayscale lib at full depth. * The tradeoff is slightly higher CPU load in the ISR (frames are calculated 'live') and an extra function in the core. * Ported all plugins which used the graylib to use the new one. * Some slight optimisations for archos and H1x0 LCD update. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15998 a1c6a512-1295-4272-9138-f99709370657
2008-01-04 23:42:38 +00:00
nop /* 3(0/0) */
move.b (%a0)+, %d1 /* 3(1/0) */
move.w %d1, (%a1) /* 1(0/1) */
subq.l #1, %d0 /* 1(0/0) */
bne .loop /* 2(0/0) */
Bring up the M5 port to a working stage: Extended numerous explicit checks for IAUDIO_X5 to also check for IAUDIO_M5, moved code around the target tree, added preliminary background for the sim. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12610 a1c6a512-1295-4272-9138-f99709370657
2007-03-05 00:04:00 +00:00
rts
.wd_end:
.size lcd_write_data,.wd_end-lcd_write_data
All-new greyscale library, replacing the old one. Features: (1) Drawing/updating is faster than the old grayscale lib at full depth. (2) Always 129 shades instead of 2..33 shades. (3) No graininess caused by frequent updates (mpegplayer, doom, ...). (4) Needs less memory than the old grayscale lib at full depth. * The tradeoff is slightly higher CPU load in the ISR (frames are calculated 'live') and an extra function in the core. * Ported all plugins which used the graylib to use the new one. * Some slight optimisations for archos and H1x0 LCD update. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15998 a1c6a512-1295-4272-9138-f99709370657
2008-01-04 23:42:38 +00:00
.align 2
.global lcd_grey_data
.type lcd_grey_data,@function
Fix graphical glitches occuring in the greyscale library on H1x0 and M5 at 124MHz. The main loop within lcd_grey_data() needed instruction reordering (interspersing lcd writes with memory accesses) to meed the LCD controller timing. Slight slowdown because of the extra register needed. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16091 a1c6a512-1295-4272-9138-f99709370657
2008-01-15 00:51:58 +00:00
/* The main loop assumes the buffers are in SDRAM. Otherwise the LCD
* controller timing won't be met at 124 MHz and graphical glitches
* will occur. */
All-new greyscale library, replacing the old one. Features: (1) Drawing/updating is faster than the old grayscale lib at full depth. (2) Always 129 shades instead of 2..33 shades. (3) No graininess caused by frequent updates (mpegplayer, doom, ...). (4) Needs less memory than the old grayscale lib at full depth. * The tradeoff is slightly higher CPU load in the ISR (frames are calculated 'live') and an extra function in the core. * Ported all plugins which used the graylib to use the new one. * Some slight optimisations for archos and H1x0 LCD update. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15998 a1c6a512-1295-4272-9138-f99709370657
2008-01-04 23:42:38 +00:00
lcd_grey_data:
Smaller & faster greylib blitting on iriver H1x0 and iAudio M5, based on the ARM version but using mulu.l for the bit shuffling. ISR speedup is ~10%. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26434 a1c6a512-1295-4272-9138-f99709370657
2010-05-31 19:56:21 +00:00
lea.l (-11*4, %sp), %sp
movem.l %d2-%d7/%a2-%a6, (%sp) /* free some registers */
movem.l (11*4+4, %sp), %a0-%a2 /* values, phases, length */
Greyscale library: Changed the internal data format once more (separated pixel values and phases), allowing for further optimisation of drawing, scrolling etc. * Optimised grey phase blitting in the core reduces CPU load on all architectures, most significantly on coldfire. Previous version was too slow to keep up at 45MHz, leading to unwanted graininess (update frequency was halved). Also fixed screendump on 2bpp targets with vertical pixel packing. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16043 a1c6a512-1295-4272-9138-f99709370657
2008-01-09 23:48:26 +00:00
lea.l (%a1, %a2.l*4), %a2 /* end address */
lea 0xf0008002, %a3 /* LCD data port */
Smaller & faster greylib blitting on iriver H1x0 and iAudio M5, based on the ARM version but using mulu.l for the bit shuffling. ISR speedup is ~10%. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26434 a1c6a512-1295-4272-9138-f99709370657
2010-05-31 19:56:21 +00:00
moveq.l #24, %d6 /* shift count */
move.l #0xc30c3, %d7 /* bit shuffle factor */
moveq.l #12, %d2
add.l %a1, %d2
and.l #0xfffffff0, %d2 /* first line bound */
cmp.l %d2, %a2 /* end address lower than first line bound? */
bhs.s 1f
move.l %a2, %d2 /* -> adjust end address of head loop */
1:
cmp.l %a1, %d2
bls.s .g_hend
Greyscale library: Changed the internal data format once more (separated pixel values and phases), allowing for further optimisation of drawing, scrolling etc. * Optimised grey phase blitting in the core reduces CPU load on all architectures, most significantly on coldfire. Previous version was too slow to keep up at 45MHz, leading to unwanted graininess (update frequency was halved). Also fixed screendump on 2bpp targets with vertical pixel packing. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16043 a1c6a512-1295-4272-9138-f99709370657
2008-01-09 23:48:26 +00:00
.g_hloop:
Smaller & faster greylib blitting on iriver H1x0 and iAudio M5, based on the ARM version but using mulu.l for the bit shuffling. ISR speedup is ~10%. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26434 a1c6a512-1295-4272-9138-f99709370657
2010-05-31 19:56:21 +00:00
move.l (%a1), %d0 /* fetch 4 pixel phases */
move.l %d0, %d1
and.l #0x80808080, %d1 /* separate MSBs of the 4 phases */
eor.l %d1, %d0 /* clear them in %d0 */
add.l (%a0)+, %d0 /* add 4 pixel values to the phases */
move.l %d0, (%a1)+ /* store new phases, advance pointer */
lsr.l #1, %d1 /* %d1 = .0.......1.......2.......3...... */
mulu.l %d7, %d1 /* %d1 = 00112233112233..2233....33...... */
not.l %d1 /* negate bits */
lsr.l %d6, %d1 /* %d1 = ........................00112233 */
move.w %d1, (%a3) /* write pixel block */
Greyscale library: Changed the internal data format once more (separated pixel values and phases), allowing for further optimisation of drawing, scrolling etc. * Optimised grey phase blitting in the core reduces CPU load on all architectures, most significantly on coldfire. Previous version was too slow to keep up at 45MHz, leading to unwanted graininess (update frequency was halved). Also fixed screendump on 2bpp targets with vertical pixel packing. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16043 a1c6a512-1295-4272-9138-f99709370657
2008-01-09 23:48:26 +00:00
Smaller & faster greylib blitting on iriver H1x0 and iAudio M5, based on the ARM version but using mulu.l for the bit shuffling. ISR speedup is ~10%. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26434 a1c6a512-1295-4272-9138-f99709370657
2010-05-31 19:56:21 +00:00
cmp.l %a1, %d2 /* go up to first line bound */
Greyscale library: Changed the internal data format once more (separated pixel values and phases), allowing for further optimisation of drawing, scrolling etc. * Optimised grey phase blitting in the core reduces CPU load on all architectures, most significantly on coldfire. Previous version was too slow to keep up at 45MHz, leading to unwanted graininess (update frequency was halved). Also fixed screendump on 2bpp targets with vertical pixel packing. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16043 a1c6a512-1295-4272-9138-f99709370657
2008-01-09 23:48:26 +00:00
bhi.s .g_hloop
Smaller & faster greylib blitting on iriver H1x0 and iAudio M5, based on the ARM version but using mulu.l for the bit shuffling. ISR speedup is ~10%. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26434 a1c6a512-1295-4272-9138-f99709370657
2010-05-31 19:56:21 +00:00
.g_hend:
cmp.l %a1, %a2
bls.w .g_tend
lea.l (-12, %a2), %a2
cmp.l %a1, %a2
bls.s .g_lend
Greyscale library: Changed the internal data format once more (separated pixel values and phases), allowing for further optimisation of drawing, scrolling etc. * Optimised grey phase blitting in the core reduces CPU load on all architectures, most significantly on coldfire. Previous version was too slow to keep up at 45MHz, leading to unwanted graininess (update frequency was halved). Also fixed screendump on 2bpp targets with vertical pixel packing. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16043 a1c6a512-1295-4272-9138-f99709370657
2008-01-09 23:48:26 +00:00
.g_lloop:
Smaller & faster greylib blitting on iriver H1x0 and iAudio M5, based on the ARM version but using mulu.l for the bit shuffling. ISR speedup is ~10%. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26434 a1c6a512-1295-4272-9138-f99709370657
2010-05-31 19:56:21 +00:00
movem.l (%a1), %d0-%d3 /* fetch 4 blocks of 4 pixel phases each */
move.l %d0, %d4 /* calculate first pixel block */
and.l #0x80808080, %d4
eor.l %d4, %d0
lsr.l #1, %d4
mulu.l %d7, %d4
not.l %d4
lsr.l %d6, %d4
move.w %d4, (%a3) /* write first pixel block to LCD */
move.l %d1, %d5 /* calculate second pixel block */
and.l #0x80808080, %d5
eor.l %d5, %d1
lsr.l #1, %d5
mulu.l %d7, %d5
not.l %d5
lsr.l %d6, %d5
move.l %d2, %d4 /* calculate third pixel block */
and.l #0x80808080, %d4
eor.l %d4, %d2
lsr.l #1, %d4
mulu.l %d7, %d4
not.l %d4
lsr.l %d6, %d4
move.w %d5, (%a3) /* write second pixel block to LCD */
movem.l (%a0), %d5/%a4-%a6 /* fetch 4 blocks of 4 pixel values each */
Fix graphical glitches occuring in the greyscale library on H1x0 and M5 at 124MHz. The main loop within lcd_grey_data() needed instruction reordering (interspersing lcd writes with memory accesses) to meed the LCD controller timing. Slight slowdown because of the extra register needed. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16091 a1c6a512-1295-4272-9138-f99709370657
2008-01-15 00:51:58 +00:00
lea.l (16, %a0), %a0
Smaller & faster greylib blitting on iriver H1x0 and iAudio M5, based on the ARM version but using mulu.l for the bit shuffling. ISR speedup is ~10%. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26434 a1c6a512-1295-4272-9138-f99709370657
2010-05-31 19:56:21 +00:00
move.w %d4, (%a3) /* write third pixel block to LCD */
move.l %d3, %d4 /* calculate fourth pixel block */
and.l #0x80808080, %d4
eor.l %d4, %d3
lsr.l #1, %d4
mulu.l %d7, %d4
not.l %d4
lsr.l %d6, %d4
add.l %d5, %d0 /* calculate 4*4 new pixel phases */
add.l %a4, %d1 /* (packed addition) */
add.l %a5, %d2
add.l %a6, %d3
movem.l %d0-%d3, (%a1) /* store 4*4 new pixel phases */
Greyscale library: Changed the internal data format once more (separated pixel values and phases), allowing for further optimisation of drawing, scrolling etc. * Optimised grey phase blitting in the core reduces CPU load on all architectures, most significantly on coldfire. Previous version was too slow to keep up at 45MHz, leading to unwanted graininess (update frequency was halved). Also fixed screendump on 2bpp targets with vertical pixel packing. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16043 a1c6a512-1295-4272-9138-f99709370657
2008-01-09 23:48:26 +00:00
lea.l (16, %a1), %a1
Smaller & faster greylib blitting on iriver H1x0 and iAudio M5, based on the ARM version but using mulu.l for the bit shuffling. ISR speedup is ~10%. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26434 a1c6a512-1295-4272-9138-f99709370657
2010-05-31 19:56:21 +00:00
move.w %d4, (%a3) /* write fourth pixel block to LCD */
Fix graphical glitches occuring in the greyscale library on H1x0 and M5 at 124MHz. The main loop within lcd_grey_data() needed instruction reordering (interspersing lcd writes with memory accesses) to meed the LCD controller timing. Slight slowdown because of the extra register needed. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16091 a1c6a512-1295-4272-9138-f99709370657
2008-01-15 00:51:58 +00:00
Smaller & faster greylib blitting on iriver H1x0 and iAudio M5, based on the ARM version but using mulu.l for the bit shuffling. ISR speedup is ~10%. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26434 a1c6a512-1295-4272-9138-f99709370657
2010-05-31 19:56:21 +00:00
cmp.l %a1, %a2 /* go up to last line bound */
bhi.s .g_lloop
.g_lend:
lea.l (12, %a2), %a2
Greyscale library: Changed the internal data format once more (separated pixel values and phases), allowing for further optimisation of drawing, scrolling etc. * Optimised grey phase blitting in the core reduces CPU load on all architectures, most significantly on coldfire. Previous version was too slow to keep up at 45MHz, leading to unwanted graininess (update frequency was halved). Also fixed screendump on 2bpp targets with vertical pixel packing. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16043 a1c6a512-1295-4272-9138-f99709370657
2008-01-09 23:48:26 +00:00
cmp.l %a1, %a2
Smaller & faster greylib blitting on iriver H1x0 and iAudio M5, based on the ARM version but using mulu.l for the bit shuffling. ISR speedup is ~10%. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26434 a1c6a512-1295-4272-9138-f99709370657
2010-05-31 19:56:21 +00:00
bls.s .g_tend
Greyscale library: Changed the internal data format once more (separated pixel values and phases), allowing for further optimisation of drawing, scrolling etc. * Optimised grey phase blitting in the core reduces CPU load on all architectures, most significantly on coldfire. Previous version was too slow to keep up at 45MHz, leading to unwanted graininess (update frequency was halved). Also fixed screendump on 2bpp targets with vertical pixel packing. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16043 a1c6a512-1295-4272-9138-f99709370657
2008-01-09 23:48:26 +00:00
.g_tloop:
Smaller & faster greylib blitting on iriver H1x0 and iAudio M5, based on the ARM version but using mulu.l for the bit shuffling. ISR speedup is ~10%. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26434 a1c6a512-1295-4272-9138-f99709370657
2010-05-31 19:56:21 +00:00
move.l (%a1), %d0 /* fetch 4 pixel phases */
Greyscale library: Changed the internal data format once more (separated pixel values and phases), allowing for further optimisation of drawing, scrolling etc. * Optimised grey phase blitting in the core reduces CPU load on all architectures, most significantly on coldfire. Previous version was too slow to keep up at 45MHz, leading to unwanted graininess (update frequency was halved). Also fixed screendump on 2bpp targets with vertical pixel packing. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16043 a1c6a512-1295-4272-9138-f99709370657
2008-01-09 23:48:26 +00:00
Smaller & faster greylib blitting on iriver H1x0 and iAudio M5, based on the ARM version but using mulu.l for the bit shuffling. ISR speedup is ~10%. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26434 a1c6a512-1295-4272-9138-f99709370657
2010-05-31 19:56:21 +00:00
move.l %d0, %d1
and.l #0x80808080, %d1
eor.l %d1, %d0
add.l (%a0)+, %d0 /* add 4 pixel values to the phases */
move.l %d0, (%a1)+ /* store new phases, advance pointer */
lsr.l #1, %d1
mulu.l %d7, %d1
not.l %d1
lsr.l %d6, %d1
move.w %d1, (%a3) /* write pixel block */
cmp.l %a1, %a2 /* go up to end address */
Greyscale library: Changed the internal data format once more (separated pixel values and phases), allowing for further optimisation of drawing, scrolling etc. * Optimised grey phase blitting in the core reduces CPU load on all architectures, most significantly on coldfire. Previous version was too slow to keep up at 45MHz, leading to unwanted graininess (update frequency was halved). Also fixed screendump on 2bpp targets with vertical pixel packing. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16043 a1c6a512-1295-4272-9138-f99709370657
2008-01-09 23:48:26 +00:00
bhi.s .g_tloop
Smaller & faster greylib blitting on iriver H1x0 and iAudio M5, based on the ARM version but using mulu.l for the bit shuffling. ISR speedup is ~10%. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26434 a1c6a512-1295-4272-9138-f99709370657
2010-05-31 19:56:21 +00:00
.g_tend:
movem.l (%sp), %d2-%d7/%a2-%a6 /* restore registers */
lea.l (11*4, %sp), %sp
All-new greyscale library, replacing the old one. Features: (1) Drawing/updating is faster than the old grayscale lib at full depth. (2) Always 129 shades instead of 2..33 shades. (3) No graininess caused by frequent updates (mpegplayer, doom, ...). (4) Needs less memory than the old grayscale lib at full depth. * The tradeoff is slightly higher CPU load in the ISR (frames are calculated 'live') and an extra function in the core. * Ported all plugins which used the graylib to use the new one. * Some slight optimisations for archos and H1x0 LCD update. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15998 a1c6a512-1295-4272-9138-f99709370657
2008-01-04 23:42:38 +00:00
rts
Greyscale library: Changed the internal data format once more (separated pixel values and phases), allowing for further optimisation of drawing, scrolling etc. * Optimised grey phase blitting in the core reduces CPU load on all architectures, most significantly on coldfire. Previous version was too slow to keep up at 45MHz, leading to unwanted graininess (update frequency was halved). Also fixed screendump on 2bpp targets with vertical pixel packing. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16043 a1c6a512-1295-4272-9138-f99709370657
2008-01-09 23:48:26 +00:00
All-new greyscale library, replacing the old one. Features: (1) Drawing/updating is faster than the old grayscale lib at full depth. (2) Always 129 shades instead of 2..33 shades. (3) No graininess caused by frequent updates (mpegplayer, doom, ...). (4) Needs less memory than the old grayscale lib at full depth. * The tradeoff is slightly higher CPU load in the ISR (frames are calculated 'live') and an extra function in the core. * Ported all plugins which used the graylib to use the new one. * Some slight optimisations for archos and H1x0 LCD update. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15998 a1c6a512-1295-4272-9138-f99709370657
2008-01-04 23:42:38 +00:00
.gd_end:
.size lcd_grey_data,.gd_end-lcd_grey_data
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