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improve sh/hi levels

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.. but reduce brigtness ~6% due to different rgb565 expansion


git-svn-id: file:///home/notaz/opt/svn/PicoDrive@890 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2010-09-09 21:10:28 +00:00
parent 7c18e34a74
commit a39d8ba585
2 changed files with 48 additions and 58 deletions
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81
pico/draw_arm.s
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@ -1595,53 +1595,26 @@ FinalizeLineBGR444:
@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ hilights 2 pixels in RGB555/BGR555 format
.macro TileDoShHi2Pixels555 reg
adds \reg, \reg, #0x40000000
orrcs \reg, \reg, #0xf0000000
mov \reg, \reg, ror #27
adds \reg, \reg, #0x40000000
orrcs \reg, \reg, #0xf0000000
mov \reg, \reg, ror #26
adds \reg, \reg, #0x40000000
orrcs \reg, \reg, #0xf0000000
mov \reg, \reg, ror #27
adds \reg, \reg, #0x40000000
orrcs \reg, \reg, #0xf0000000
mov \reg, \reg, ror #27
adds \reg, \reg, #0x40000000
orrcs \reg, \reg, #0xf0000000
mov \reg, \reg, ror #26
adds \reg, \reg, #0x40000000
orrcs \reg, \reg, #0xf0000000
mov \reg, \reg, ror #27
.endm
@ Convert 0000bbb0 ggg0rrr0
@ to rrrrrggg gggbbbbb
@ r2,r3,r9 - scratch, lr = 0x001c001c, r8 = 0x00030003
@ r2,r3 - scratch, lr = 0x001c001c, r8 = 0x08610861
.macro convRGB565 reg
and r2, lr, \reg,lsl #1
and r9, r8, \reg,lsr #2
orr r2, r2, r9 @ r2=red
and r3, lr, \reg,lsr #7
and r9, r8, \reg,lsr #10
orr r3, r3, r9 @ r3=blue
and \reg, \reg, lr, lsl #3
orr \reg, \reg, \reg,lsl #3 @ green
orr \reg, \reg, r2, lsl #11 @ add red back
orr \reg, \reg, r3 @ add blue back
and r2, lr, \reg,lsr #7 @ b
and r3, lr, \reg,lsr #3 @ g
and \reg, lr, \reg,lsl #1 @ r
orr r2, r2, r3, lsl #6
orr \reg, r2, \reg,lsl #11
and r2, r8, \reg,lsr #4
orr \reg, \reg, r2
.endm
@ trashes: r2-r9,r12,lr; r0,r1 are advanced
@ trashes: r2-r8,r12,lr; r8 = 0x08610861; r0,r1 are advanced
.macro vidConvCpyRGB565_local
mov r12, r2, lsr #3 @ repeats
mov lr, #0x001c0000
orr lr, lr, #0x01c @ lr == pattern 0x001c001c
mov r8, #0x00030000
orr r8, r8, #0x003
0:
ldmia r1!, {r4-r7}
@ -1663,6 +1636,9 @@ FinalizeLineBGR444:
vidConvCpyRGB565: @ void *to, void *from, int pixels
stmfd sp!, {r4-r9,lr}
mov r8, #0x0061
orr r8, r8, #0x0800
orr r8, r8, lsl #16
vidConvCpyRGB565_local
ldmfd sp!, {r4-r9,lr}
bx lr
@ -1676,9 +1652,8 @@ PicoDoHighPal555:
ldr r8, =(Pico+0x22228) @ Pico.video
PicoDoHighPal555_nopush:
str r1, [sp, #-8] @ is called from FinalizeLine555?
orr r9, r1, r0, lsl #31 @ 0:called from FinalizeLine555, 31: s/h
str r0, [sp, #-4]
ldr r0, =HighPal
mov r1, #0
@ -1686,10 +1661,13 @@ PicoDoHighPal555_nopush:
sub r1, r8, #0x128 @ r1=Pico.cram
mov r2, #0x40
mov r8, #0x0061
orr r8, r8, #0x0800
orr r8, r8, lsl #16
vidConvCpyRGB565_local
ldr r0, [sp, #-4]
tst r0, r0
tst r9, #(1<<31)
beq PicoDoHighPal555_end
ldr r3, =HighPal
@ -1711,19 +1689,28 @@ PicoDoHighPal555_nopush:
bne .fl_loopcpRGB555_sh
@ hilighted pixels:
@ t = ((dpal[i] >> 1) & 0x738e738e) + 0x738e738e;
@ t |= (t >> 4) & 0x08610861;
@ r8=0x08610861
sub r3, r3, #0x40*2
mov lr, #0x40/2
mov lr, #0x40/4
.fl_loopcpRGB555_hi:
ldr r1, [r3], #4
TileDoShHi2Pixels555 r1
str r1, [r4], #4
ldmia r3!, {r1,r6}
and r1, r12, r1, lsr #1
and r6, r12, r6, lsr #1
add r1, r12, r1
add r6, r12, r6
and r5, r8, r1, lsr #4
and r7, r8, r6, lsr #4
orr r1, r1, r5
orr r6, r6, r7
stmia r4!, {r1,r6}
subs lr, lr, #1
bne .fl_loopcpRGB555_hi
mov r0, #1
PicoDoHighPal555_end:
ldr r1, [sp, #-8]
tst r1, r1
tst r9, #1
ldmeqfd sp!, {r4-r9,pc}
ldr r8, =(Pico+0x22228) @ Pico.video