mirror of
https://github.com/RaySollium99/libpicofe.git
synced 2025-09-05 06:47:45 -04:00
13059a606f
git-svn-id: file:///home/notaz/opt/svn/PicoDrive/platform@225 be3aeb3a-fb24-0410-a615-afba39da0efa
219 lines
4.8 KiB
ArmAsm
219 lines
4.8 KiB
ArmAsm
@ vim:filetype=armasm
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@ some color conversion and blitting routines
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@ (c) Copyright 2006, notaz
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@ All Rights Reserved
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@ vim:filetype=armasm
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@ Convert 0000bbb0 ggg0rrr0 0000bbb0 ggg0rrr0
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@ to 00000000 rrr00000 ggg00000 bbb00000 ...
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@ lr = 0x00e000e0, out: r3=lower_pix, r2=higher_pix; trashes rin
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@ if sh==2, r8=0x00404040 (sh!=0 destroys flags!)
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.macro convRGB32_2 rin sh=0
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and r2, lr, \rin, lsr #4 @ blue
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and r3, \rin, lr
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orr r2, r2, r3, lsl #8 @ g0b0g0b0
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mov r3, r2, lsl #16 @ g0b00000
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and \rin,lr, \rin, ror #12 @ 00r000r0 (reversed)
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orr r3, r3, \rin, lsr #16 @ g0b000r0
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.if \sh == 1
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mov r3, r3, ror #17 @ shadow mode
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.elseif \sh == 2
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adds r3, r3, #0x40000000 @ green
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orrcs r3, r3, #0xe0000000
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mov r3, r3, ror #8
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adds r3, r3, #0x40000000
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orrcs r3, r3, #0xe0000000
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mov r3, r3, ror #16
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adds r3, r3, #0x40000000
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orrcs r3, r3, #0xe0000000
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mov r3, r3, ror #24
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.else
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mov r3, r3, ror #16 @ r3=low
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.endif
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orr r3, r3, r3, lsr #3
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str r3, [r0], #4
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mov r2, r2, lsr #16
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orr r2, r2, \rin, lsl #16
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.if \sh == 1
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mov r2, r2, lsr #1
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.elseif \sh == 2
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mov r2, r2, ror #8
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adds r2, r2, #0x40000000 @ blue
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orrcs r2, r2, #0xe0000000
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mov r2, r2, ror #8
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adds r2, r2, #0x40000000
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orrcs r2, r2, #0xe0000000
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mov r2, r2, ror #8
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adds r2, r2, #0x40000000
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orrcs r2, r2, #0xe0000000
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mov r2, r2, ror #8
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.endif
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orr r2, r2, r2, lsr #3
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str r2, [r0], #4
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.endm
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.global vidConvCpyRGB32 @ void *to, void *from, int pixels
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vidConvCpyRGB32:
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stmfd sp!, {r4-r7,lr}
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mov r12, r2, lsr #3 @ repeats
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mov lr, #0x00e00000
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orr lr, lr, #0x00e0
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.loopRGB32:
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subs r12, r12, #1
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ldmia r1!, {r4-r7}
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convRGB32_2 r4
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convRGB32_2 r5
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convRGB32_2 r6
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convRGB32_2 r7
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bgt .loopRGB32
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ldmfd sp!, {r4-r7,lr}
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bx lr
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.global vidConvCpyRGB32sh @ void *to, void *from, int pixels
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vidConvCpyRGB32sh:
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stmfd sp!, {r4-r7,lr}
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mov r12, r2, lsr #3 @ repeats
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mov lr, #0x00e00000
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orr lr, lr, #0x00e0
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.loopRGB32sh:
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subs r12, r12, #1
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ldmia r1!, {r4-r7}
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convRGB32_2 r4, 1
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convRGB32_2 r5, 1
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convRGB32_2 r6, 1
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convRGB32_2 r7, 1
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bgt .loopRGB32sh
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ldmfd sp!, {r4-r7,lr}
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bx lr
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.global vidConvCpyRGB32hi @ void *to, void *from, int pixels
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vidConvCpyRGB32hi:
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stmfd sp!, {r4-r7,lr}
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mov r12, r2, lsr #3 @ repeats
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mov lr, #0x00e00000
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orr lr, lr, #0x00e0
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.loopRGB32hi:
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ldmia r1!, {r4-r7}
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convRGB32_2 r4, 2
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convRGB32_2 r5, 2
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convRGB32_2 r6, 2
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convRGB32_2 r7, 2
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subs r12, r12, #1
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bgt .loopRGB32hi
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ldmfd sp!, {r4-r7,lr}
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bx lr
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@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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@ mode2 blitter for 40 cols
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.global vidCpyM2_40col @ void *dest, void *src
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vidCpyM2_40col:
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stmfd sp!, {r4-r6,lr}
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mov r12, #224 @ lines
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add r1, r1, #8
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vidCpyM2_40_loop_out:
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mov r6, #10
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vidCpyM2_40_loop:
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subs r6, r6, #1
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ldmia r1!, {r2-r5}
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stmia r0!, {r2-r5}
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ldmia r1!, {r2-r5}
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stmia r0!, {r2-r5}
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bne vidCpyM2_40_loop
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subs r12,r12,#1
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add r1, r1, #8
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bne vidCpyM2_40_loop_out
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ldmfd sp!, {r4-r6,lr}
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bx lr
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@ mode2 blitter for 32 cols
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.global vidCpyM2_32col @ void *dest, void *src
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vidCpyM2_32col:
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stmfd sp!, {r4-r6,lr}
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mov r12, #224 @ lines
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add r1, r1, #8
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add r0, r0, #32
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vidCpyM2_32_loop_out:
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mov r6, #8
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vidCpyM2_32_loop:
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subs r6, r6, #1
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ldmia r1!, {r2-r5}
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stmia r0!, {r2-r5}
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ldmia r1!, {r2-r5}
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stmia r0!, {r2-r5}
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bne vidCpyM2_32_loop
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subs r12,r12,#1
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add r0, r0, #64
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add r1, r1, #8+64
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bne vidCpyM2_32_loop_out
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ldmfd sp!, {r4-r6,lr}
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bx lr
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@ mode2 blitter for 32 cols with no borders
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.global vidCpyM2_32col_nobord @ void *dest, void *src
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vidCpyM2_32col_nobord:
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stmfd sp!, {r4-r6,lr}
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mov r12, #224 @ lines
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add r1, r1, #8
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b vidCpyM2_32_loop_out
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.global spend_cycles @ c
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spend_cycles:
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mov r0, r0, lsr #2 @ 4 cycles/iteration
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sub r0, r0, #2 @ entry/exit/init
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.sc_loop:
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subs r0, r0, #1
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bpl .sc_loop
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bx lr
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.global flushcache
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flushcache:
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swi #0x9f0002
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mov pc, lr
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