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https://github.com/RaySollium99/libpicofe.git
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095a240bd9
git-svn-id: file:///home/notaz/opt/svn/PicoDrive/platform@587 be3aeb3a-fb24-0410-a615-afba39da0efa
56 lines
1.2 KiB
ArmAsm
56 lines
1.2 KiB
ArmAsm
@ vim:filetype=armasm
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.global clut_line @ void *dest, void *src, unsigned short *pal, int pixels_mask
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clut_line:
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stmfd sp!, {r4-r11,lr}
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and lr, r3, #0xff0000
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mov lr, lr, lsr #15 @ mask
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mov r3, r3, lsr #3
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and r3, r3, #0xff @ counter
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add r11,r0, #800*2
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clut_line_loop:
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ldmia r1!, {r10,r12}
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and r4, lr, r10, lsl #1
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ldrh r4, [r2, r4]
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and r5, lr, r10, lsr #7
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ldrh r5, [r2, r5]
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orr r4, r4, r4, lsl #16
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and r6, lr, r10, lsr #15
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ldrh r6, [r2, r6]
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orr r5, r5, r5, lsl #16
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and r7, lr, r10, lsr #23
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ldrh r7, [r2, r7]
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orr r6, r6, r6, lsl #16
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and r8, lr, r12, lsl #1
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ldrh r8, [r2, r8]
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orr r7, r7, r7, lsl #16
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and r9, lr, r12, lsr #7
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ldrh r9, [r2, r9]
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orr r8, r8, r8, lsl #16
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and r10,lr, r12, lsr #15
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ldrh r10,[r2, r10]
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orr r9, r9, r9, lsl #16
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and r12,lr, r12, lsr #23
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ldrh r12,[r2, r12]
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orr r10,r10,r10, lsl #16
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subs r3, r3, #1
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orr r12,r12,r12, lsl #16
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stmia r0!, {r4-r10,r12}
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stmia r11!,{r4-r10,r12}
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bne clut_line_loop
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ldmfd sp!, {r4-r11,pc}
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