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.global BlitBufferToScreen
BlitBufferToScreen:
;@ r0 - Buffer to copy from
;@ r1 - Buffer to copy to
stmfd sp!,{r4-r12,lr}
mov r12,#240>>1
1:
;@ first line is perfectly aligned
ldmia r0!,{r2-r11}
stmia r1!,{r2-r11}
ldmia r0!,{r2-r11}
stmia r1!,{r2-r11}
ldmia r0!,{r2-r11}
stmia r1!,{r2-r11}
ldmia r0!,{r2-r11}
stmia r1!,{r2-r11}
ldmia r0!,{r2-r11}
stmia r1!,{r2-r11}
ldmia r0!,{r2-r11}
stmia r1!,{r2-r11}
ldmia r0!,{r2-r11}
stmia r1!,{r2-r11}
ldmia r0!,{r2-r11}
stmia r1!,{r2-r11}
ldmia r0!,{r2-r11}
stmia r1!,{r2-r11}
ldmia r0!,{r2-r11}
stmia r1!,{r2-r11}
ldmia r0!,{r2-r11}
stmia r1!,{r2-r11}
ldmia r0!,{r2-r11}
stmia r1!,{r2-r11}
ldmia r0!,{r2-r11}
stmia r1!,{r2-r11}
ldmia r0!,{r2-r11}
stmia r1!,{r2-r11}
ldmia r0!,{r2-r11}
stmia r1!,{r2-r11}
ldmia r0!,{r2-r11}
stmia r1!,{r2-r11}
add r1,r1,#2
ldmia r0!,{r2-r6}
strh r2,[r1],#2
mov lr,#15
2:
mov r2,r2,lsr#16
orr r2,r2,r3,lsl#16
mov r3,r3,lsr#16
orr r3,r3,r4,lsl#16
mov r4,r4,lsr#16
orr r4,r4,r5,lsl#16
mov r5,r5,lsr#16
orr r5,r5,r6,lsl#16
mov r6,r6,lsr#16
ldmia r0!,{r7-r11}
orr r6,r6,r7,lsl#16
stmia r1!,{r2-r6}
mov r7,r7,lsr#16
orr r7,r7,r8,lsl#16
mov r8,r8,lsr#16
orr r8,r8,r9,lsl#16
mov r9,r9,lsr#16
orr r9,r9,r10,lsl#16
mov r10,r10,lsr#16
orr r10,r10,r11,lsl#16
mov r11,r11,lsr#16
ldmia r0!,{r2-r6}
orr r11,r11,r2,lsl#16
stmia r1!,{r7-r11}
subs lr,lr,#1
bne 2b
mov r2,r2,lsr#16
orr r2,r2,r3,lsl#16
mov r3,r3,lsr#16
orr r3,r3,r4,lsl#16
mov r4,r4,lsr#16
orr r4,r4,r5,lsl#16
mov r5,r5,lsr#16
orr r5,r5,r6,lsl#16
mov r6,r6,lsr#16
ldmia r0!,{r7-r11}
orr r6,r6,r7,lsl#16
stmia r1!,{r2-r6}
mov r7,r7,lsr#16
orr r7,r7,r8,lsl#16
mov r8,r8,lsr#16
orr r8,r8,r9,lsl#16
mov r9,r9,lsr#16
orr r9,r9,r10,lsl#16
mov r10,r10,lsr#16
orr r10,r10,r11,lsl#16
mov r11,r11,lsr#16
stmia r1!,{r7-r11}
subs r12,r12,#1
bne 1b
ldmfd sp!,{r4-r12,pc}
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