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* Assembler optimised gray_update_rect() and writearray() for arm (greyscale iPods). * Some slight optimisations for coldfire (H1x0) and SH1 (archos). * Comment and formatting cleanup.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@10473 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2006-08-07 17:21:38 +00:00
parent 8921b34e4b
commit c00d799fa3
3 changed files with 675 additions and 406 deletions
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83
apps/plugins/lib/gray_scroll.c
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@ -283,32 +283,32 @@ void gray_ub_scroll_left(int count)
if (count)
{
asm (
"mov r4, %[high] \n"
"mov r4, %[high] \n" /* rows = height */
".sl_rloop: \n"
"mov r5, %[addr] \n"
"mov r2, %[dpth] \n"
".sl_rloop: \n" /* repeat for every row */
"mov r5, %[addr] \n" /* get start address */
"mov r2, %[dpth] \n" /* planes = depth */
".sl_oloop: \n"
"mov r6, r5 \n"
"mov r3, %[cols] \n"
"mov r1, #0 \n"
".sl_oloop: \n" /* repeat for every bitplane */
"mov r6, r5 \n" /* get start address */
"mov r3, %[cols] \n" /* cols = col_count */
"mov r1, #0 \n" /* fill with zero */
".sl_iloop: \n"
"mov r1, r1, lsr #8 \n"
"ldrb r0, [r6, #-1]! \n"
"orr r1, r1, r0, lsl %[cnt] \n"
"strb r1, [r6] \n"
".sl_iloop: \n" /* repeat for all cols */
"mov r1, r1, lsr #8 \n" /* shift right to get residue */
"ldrb r0, [r6, #-1]! \n" /* decrement addr & get data byte */
"orr r1, r1, r0, lsl %[cnt] \n" /* combine with last residue */
"strb r1, [r6] \n" /* store data */
"subs r3, r3, #1 \n"
"bne .sl_iloop \n"
"subs r3, r3, #1 \n" /* cols-- */
"bne .sl_iloop \n"
"add r5, r5, %[psiz] \n"
"subs r2, r2, #1 \n"
"bne .sl_oloop \n"
"add r5, r5, %[psiz] \n" /* start_address += plane_size */
"subs r2, r2, #1 \n" /* planes-- */
"bne .sl_oloop \n"
"add %[addr],%[addr],%[bwid] \n"
"subs r4, r4, #1 \n"
"add %[addr],%[addr],%[bwid] \n" /* start_address += bwidth */
"subs r4, r4, #1 \n" /* rows-- */
"bne .sl_rloop \n"
: /* outputs */
: /* inputs */
@ -364,32 +364,32 @@ void gray_ub_scroll_right(int count)
if (count)
{
asm (
"mov r4, %[high] \n"
"mov r4, %[high] \n" /* rows = height */
".sr_rloop: \n"
"mov r5, %[addr] \n"
"mov r2, %[dpth] \n"
".sr_rloop: \n" /* repeat for every row */
"mov r5, %[addr] \n" /* get start address */
"mov r2, %[dpth] \n" /* planes = depth */
".sr_oloop: \n"
"mov r6, r5 \n"
"mov r3, %[cols] \n"
"mov r1, #0 \n"
".sr_oloop: \n" /* repeat for every bitplane */
"mov r6, r5 \n" /* get start address */
"mov r3, %[cols] \n" /* cols = col_count */
"mov r1, #0 \n" /* fill with zero */
".sr_iloop: \n"
"ldrb r0, [r6] \n"
"orr r1, r0, r1, lsl #8 \n"
"mov r0, r1, lsr %[cnt] \n"
"strb r0, [r6], #1 \n"
".sr_iloop: \n" /* repeat for all cols */
"ldrb r0, [r6] \n" /* get data byte */
"orr r1, r0, r1, lsl #8 \n" /* combine w/ old data shifted to 2nd byte */
"mov r0, r1, lsr %[cnt] \n" /* shift right */
"strb r0, [r6], #1 \n" /* store data, increment addr */
"subs r3, r3, #1 \n"
"bne .sr_iloop \n"
"subs r3, r3, #1 \n" /* cols-- */
"bne .sr_iloop \n"
"add r5, r5, %[psiz] \n"
"subs r2, r2, #1 \n"
"bne .sr_oloop \n"
"add r5, r5, %[psiz] \n" /* start_address += plane_size */
"subs r2, r2, #1 \n" /* planes-- */
"bne .sr_oloop \n"
"add %[addr],%[addr],%[bwid] \n"
"subs r4, r4, #1 \n"
"add %[addr],%[addr],%[bwid] \n" /* start_address += bwidth */
"subs r4, r4, #1 \n" /* rows-- */
"bne .sr_rloop \n"
: /* outputs */
: /* inputs */
@ -714,8 +714,7 @@ void gray_ub_scroll_up(int count)
"move.b (%%a1),%%d0 \n" /* get data byte */
"lsl.l #8,%%d1 \n" /* old data to 2nd byte */
"or.l %%d1,%%d0 \n" /* combine old data */
"clr.l %%d1 \n"
"move.b %%d0,%%d1 \n" /* keep data for next round */
"move.l %%d0,%%d1 \n" /* keep data for next round */
"lsr.l %[cnt],%%d0 \n" /* shift right */
"move.b %%d0,(%%a1) \n" /* store data */