mirror of
https://github.com/RaySollium99/picodrive.git
synced 2025-09-05 15:27:46 -04:00
cc41eb4fa3
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@717 be3aeb3a-fb24-0410-a615-afba39da0efa
347 lines
7.9 KiB
ArmAsm
347 lines
7.9 KiB
ArmAsm
@ vim:filetype=armasm
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@ some color conversion and blitting routines
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@ (c) Copyright 2006, 2007 notaz
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@ All Rights Reserved
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@ vim:filetype=armasm
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.text
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.align 4
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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
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.global vidcpy_m2 @ void *dest, void *src, int m32col, int with_32c_border
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vidcpy_m2:
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stmfd sp!, {r4-r6,lr}
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mov r12, #224 @ lines
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add r0, r0, #320*8
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add r1, r1, #8
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mov lr, #0
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tst r2, r2
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movne lr, #64
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tstne r3, r3
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addne r0, r0, #32
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vidCpyM2_loop_out:
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mov r6, #10
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sub r6, r6, lr, lsr #5 @ -= 2 in 32col mode
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vidCpyM2_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_loop
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subs r12,r12,#1
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add r0, r0, lr
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add r1, r1, #8
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add r1, r1, lr
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bne vidCpyM2_loop_out
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ldmfd sp!, {r4-r6,pc}
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.global vidcpy_m2_rot @ void *dest, void *src, int m32col, int with_32c_border
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vidcpy_m2_rot:
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stmfd sp!,{r4-r8,lr}
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add r1, r1, #8
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tst r2, r2
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subne r1, r1, #32 @ adjust
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mov r4, r0
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mov r5, r1
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mov r6, r2
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mov r7, #8+4
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vidcpy_m2_rot_loop:
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@ a bit lame but oh well..
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mov r0, r4
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mov r1, r5
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mov r2, r7
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mov r3, r6
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mov r8, #328
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adr lr, after_rot_blit8
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stmfd sp!,{r4-r8,lr}
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b rotated_blit8_2
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after_rot_blit8:
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add r5, r5, #328*4
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add r7, r7, #4
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cmp r7, #224+8+4
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ldmgefd sp!,{r4-r8,pc}
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b vidcpy_m2_rot_loop
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.global rotated_blit8 @ void *dst, void *linesx4, u32 y, int is_32col
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rotated_blit8:
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stmfd sp!,{r4-r8,lr}
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mov r8, #320
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rotated_blit8_2:
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add r0, r0, #(240*320)
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sub r0, r0, #(240+4) @ y starts from 4
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add r0, r0, r2
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tst r3, r3
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subne r0, r0, #(240*32)
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addne r1, r1, #32
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movne lr, #256/4
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moveq lr, #320/4
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rotated_blit_loop8:
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mov r6, r1
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ldr r2, [r6], r8
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ldr r3, [r6], r8
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ldr r4, [r6], r8
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ldr r5, [r6], r8
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mov r6, r2, lsl #24
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mov r6, r6, lsr #8
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orr r6, r6, r3, lsl #24
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mov r6, r6, lsr #8
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orr r6, r6, r4, lsl #24
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mov r6, r6, lsr #8
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orr r6, r6, r5, lsl #24
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str r6, [r0], #-240
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and r6, r3, #0xff00
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and r7, r2, #0xff00
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orr r6, r6, r7, lsr #8
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and r7, r4, #0xff00
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orr r6, r6, r7, lsl #8
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and r7, r5, #0xff00
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orr r6, r6, r7, lsl #16
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str r6, [r0], #-240
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and r6, r4, #0xff0000
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and r7, r2, #0xff0000
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orr r6, r6, r7, lsr #16
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and r7, r3, #0xff0000
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orr r6, r6, r7, lsr #8
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and r7, r5, #0xff0000
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orr r6, r6, r7, lsl #8
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str r6, [r0], #-240
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mov r6, r5, lsr #24
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mov r6, r6, lsl #8
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orr r6, r6, r4, lsr #24
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mov r6, r6, lsl #8
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orr r6, r6, r3, lsr #24
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mov r6, r6, lsl #8
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orr r6, r6, r2, lsr #24
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str r6, [r0], #-240
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subs lr, lr, #1
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add r1, r1, #4
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bne rotated_blit_loop8
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ldmfd sp!,{r4-r8,pc}
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@ input: r2-r5
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@ output: r7,r8
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@ trash: r6
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.macro rb_line_low
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mov r6, r2, lsl #16
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mov r7, r3, lsl #16
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orr r7, r7, r6, lsr #16
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mov r6, r4, lsl #16
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mov r8, r5, lsl #16
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orr r8, r8, r6, lsr #16
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.endm
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.macro rb_line_hi
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mov r6, r2, lsr #16
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mov r7, r3, lsr #16
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orr r7, r6, r7, lsl #16
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mov r6, r4, lsr #16
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mov r8, r5, lsr #16
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orr r8, r6, r8, lsl #16
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.endm
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.global rotated_blit16 @ void *dst, void *linesx4, u32 y, int is_32col
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rotated_blit16:
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stmfd sp!,{r4-r8,lr}
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add r0, r0, #(240*320)*2
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sub r0, r0, #(240+4)*2 @ y starts from 4
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add r0, r0, r2, lsl #1
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tst r3, r3
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subne r0, r0, #(240*32)*2
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addne r1, r1, #32*2
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movne lr, #256/4
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moveq lr, #320/4
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rotated_blit_loop16:
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ldr r2, [r1, #320*0*2]
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ldr r3, [r1, #320*1*2]
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ldr r4, [r1, #320*2*2]
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ldr r5, [r1, #320*3*2]
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rb_line_low
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stmia r0, {r7,r8}
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sub r0, r0, #240*2
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rb_line_hi
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stmia r0, {r7,r8}
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sub r0, r0, #240*2
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ldr r2, [r1, #320*0*2+4]
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ldr r3, [r1, #320*1*2+4]
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ldr r4, [r1, #320*2*2+4]
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ldr r5, [r1, #320*3*2+4]
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rb_line_low
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stmia r0, {r7,r8}
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sub r0, r0, #240*2
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rb_line_hi
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stmia r0, {r7,r8}
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sub r0, r0, #240*2
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subs lr, lr, #1
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add r1, r1, #8
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bne rotated_blit_loop16
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ldmfd sp!,{r4-r8,pc}
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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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