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renderers (interlace and stuff)

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@267 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-10-01 21:05:32 +00:00
parent f3d1de29da
commit a8869ad1e8
5 changed files with 58 additions and 27 deletions
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19
platform/gizmondo/asm_utils.s
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@ -1,23 +1,31 @@
@ vim:filetype=armasm
.global vidCpy8to16 @ void *dest, void *src, short *pal, int lines|(is32col<<8)
.global vidCpy8to16 @ void *dest, void *src, short *pal, int lines|(flags<<16),
@ flags=is32col[0], no_even_lines[1], no_odd_lines[2]
vidCpy8to16:
stmfd sp!, {r4-r8,lr}
tst r3, #0x100
and r4, r3, #0xff0000
and r3, r3, #0xff
tst r4, #0x10000
mov r3, r3, lsr #1
orr r3, r3, r3, lsl #8
orreq r3, r3, #(320/8-1)<<24 @ 40 col mode
orrne r3, r3, #(256/8-1)<<24 @ 32 col mode
orrne r3, r3, #0x10000
addne r0, r0, #32*2
orr r3, r3, r4
add r1, r1, #8
mov lr, #0xff
mov lr, lr, lsl #1
@ no even lines?
tst r3, #0x20000
addne r0, r0, #320*2
addne r1, r1, #328
bne vcloop_odd
@ even lines first
vcloop_aligned:
ldr r12, [r1], #4
@ -62,6 +70,10 @@ vcloop_aligned:
tst r3, #0xff
bne vcloop_aligned
@ no odd lines?
tst r3, #0x40000
ldmnefd sp!, {r4-r8,pc}
and r4, r3, #0xff00
orr r3, r3, r4, lsr #8
mov r4, r4, lsr #7
@ -75,6 +87,7 @@ vcloop_aligned:
sub r1, r1, r4
sub r0, r0, #2
vcloop_odd:
mov r8, #0
vcloop_unaligned: