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portrait mode asm
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notaz committed Jun 11, 2009
1 parent 5a01fba commit 73d1a85
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259 changes: 259 additions & 0 deletions gp2x/upscale_aspect.s
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Expand Up @@ -316,5 +316,264 @@ loop2:

ldmfd sp!,{r4-r11,pc}


.global upscale_aspect_row @ void *dst, void *linesx4, u32 row
upscale_aspect_row:
stmfd sp!,{r4-r11,lr}
mov lr, #0x0000001f
orr lr, lr, #0x0000f800 @ for "unpacked" form of
orr lr, lr, #0x07e00000 @ 00000ggg'ggg00000'rrrrr000'000bbbbb
mov r12, #0x00000001
orr r12,r12,#0x00000800
orr r12,r12,#0x00200000 @ rounding constant

mov r8, #(240/6) @ cols

add r0, r0, #(240*320)*2
add r0, r0, #12*2
add r0, r0, r2, lsl #3

uar_loop:
ldr r10,[r1]
ldr r11,[r1, #240*2*1]

unpack_lo r4, r10
unpack_hi r5, r10
unpack_lo r6, r11
unpack_hi r7, r11

ldr r11,[r1, #240*2*2]

do_3_5 r4, r6
orr r2, r2, r2, lsr #16
mov r3, r10, lsl #16
mov r3, r3, lsr #16
orr r2, r3, r2, lsl #16
str r2, [r0, #-240*2]! @ 0,8

unpack_lo r10,r11
unpack_hi r9, r11

do_3_5 r10,r6
orr r2, r2, r2, lsl #16
mov r3, r11, lsl #16
orr r2, r3, r2, lsr #16
str r2, [r0, #4] @ 16,24

do_3_5 r4, r5
orr r3, r2, r2, lsl #16

do_14_7_7_4 r7, r5, r6, r4
orr r2, r2, r2, lsr #16
mov r3, r3, lsr #16
orr r2, r3, r2, lsl #16
str r2, [r0, #-240*2]! @ 1,9

ldr r11,[r1, #4]

do_14_7_7_4 r7, r6, r9, r10
orr r3, r2, r2, lsl #16

do_3_5 r10,r9
orr r2, r2, r2, lsr #16
mov r3, r3, lsr #16
orr r2, r3, r2, lsl #16
str r2, [r0, #4] @ 17,25

ldr r10,[r1, #240*2*1+4]

unpack_lo r4, r11
unpack_lo r6, r10

do_3_5 r4, r5
orr r3, r2, r2, lsl #16

do_14_7_7_4 r7, r5, r6, r4
orr r2, r2, r2, lsr #16
mov r3, r3, lsr #16
orr r2, r3, r2, lsl #16
str r2, [r0, #-240*2]! @ 2,10

do_3_5 r4, r6

ldr r4, [r1, #240*2*2+4]

orr r2, r2, r2, lsr #16
mov r3, r11, lsl #16
mov r3, r3, lsr #16
orr r2, r3, r2, lsl #16
str r2, [r0, #-240*2] @ 3,11

unpack_lo r5, r4

do_14_7_7_4 r7, r6, r9, r5
orr r3, r2, r2, lsl #16

do_3_5 r5, r9
orr r2, r2, r2, lsr #16
mov r2, r2, lsl #16
orr r2, r2, r3, lsr #16
str r2, [r0, #4] @ 18,26

do_3_5 r5, r6
orr r2, r2, r2, lsl #16
mov r3, r4, lsl #16
orr r2, r3, r2, lsr #16
str r2, [r0, #-240*2+4] @ 19,27

unpack_hi r5, r11
unpack_hi r6, r10
unpack_hi r7, r4

ldr r10,[r1, #8]

do_3_5 r5, r6
orr r2, r2, r2, lsr #16
mov r3, r11, lsr #16
orr r2, r3, r2, lsl #16
str r2, [r0, #-240*2*2]! @ 4,12

ldr r11,[r1, #240*2*1+8]

do_3_5 r7, r6
orr r2, r2, r2, lsl #16
mov r3, r4, lsr #16
mov r3, r3, lsl #16
orr r2, r3, r2, lsr #16
str r2, [r0, #4] @ 20,28

unpack_lo r4, r10
unpack_lo r9, r11

ldr r11,[r1, #240*2*2+8]

do_3_5 r5, r4
orr r3, r2, r2, lsl #16

do_14_7_7_4 r9, r4, r6, r5
orr r2, r2, r2, lsr #16
mov r2, r2, lsl #16
orr r2, r2, r3, lsr #16
str r2, [r0, #-240*2]! @ 5,13

unpack_lo r5, r11

do_14_7_7_4 r9, r5, r6, r7
orr r3, r2, r2, lsl #16

do_3_5 r7, r5
orr r2, r2, r2, lsr #16
mov r3, r3, lsr #16
orr r2, r3, r2, lsl #16
str r2, [r0, #4] @ 21,29

ldr r7, [r1, #240*2*1+8]

unpack_hi r6, r10
unpack_hi r7, r7

do_3_5 r6, r4
orr r3, r2, r2, lsl #16

do_14_7_7_4 r9, r4, r7, r6
orr r2, r2, r2, lsr #16
mov r2, r2, lsl #16
orr r2, r2, r3, lsr #16
str r2, [r0, #-240*2]! @ 6,14

unpack_hi r4, r11

do_14_7_7_4 r9, r5, r7, r4
orr r3, r2, r2, lsl #16

do_3_5 r4, r5
orr r2, r2, r2, lsr #16
mov r3, r3, lsr #16
orr r2, r3, r2, lsl #16
str r2, [r0, #4] @ 22,30

do_3_5 r6, r7
orr r2, r2, r2, lsr #16
mov r3, r10, lsr #16
orr r2, r3, r2, lsl #16
str r2, [r0, #-240*2]! @ 7,15

do_3_5 r4, r7
orr r2, r2, r2, lsl #16
mov r3, r11, lsr #16
mov r3, r3, lsl #16
orr r2, r3, r2, lsr #16
str r2, [r0, #4] @ 23,31

subs r8, r8, #1
add r1, r1, #12
bne uar_loop

ldmfd sp!,{r4-r11,pc}


@ bonus function

@ input: r2-r5
@ output: r7,r8
@ trash: r6
.macro rb_line_low
mov r6, r2, lsl #16
mov r7, r3, lsl #16
orr r7, r7, r6, lsr #16
mov r6, r4, lsl #16
mov r8, r5, lsl #16
orr r8, r8, r6, lsr #16
.endm

.macro rb_line_hi
mov r6, r2, lsr #16
mov r7, r3, lsr #16
orr r7, r6, r7, lsl #16
mov r6, r4, lsr #16
mov r8, r5, lsr #16
orr r8, r6, r8, lsl #16
.endm

.global do_rotated_blit @ void *dst, void *linesx4, u32 y
do_rotated_blit:
stmfd sp!,{r4-r8,lr}

add r0, r0, #(240*320)*2
sub r0, r0, #(240*40)*2
sub r0, r0, #(240-40+4)*2 @ y starts from 4
add r0, r0, r2, lsl #1

mov lr, #240/4

rotated_blit_loop:
ldr r2, [r1, #240*0*2]
ldr r3, [r1, #240*1*2]
ldr r4, [r1, #240*2*2]
ldr r5, [r1, #240*3*2]
rb_line_low
stmia r0, {r7,r8}
sub r0, r0, #240*2
rb_line_hi
stmia r0, {r7,r8}
sub r0, r0, #240*2

ldr r2, [r1, #240*0*2+4]
ldr r3, [r1, #240*1*2+4]
ldr r4, [r1, #240*2*2+4]
ldr r5, [r1, #240*3*2+4]
rb_line_low
stmia r0, {r7,r8}
sub r0, r0, #240*2
rb_line_hi
stmia r0, {r7,r8}
sub r0, r0, #240*2

subs lr, lr, #1
add r1, r1, #8
bne rotated_blit_loop

ldmfd sp!,{r4-r8,pc}

@ vim:filetype=armasm

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