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.global asmClearScreenFast8
.global asmClearScreenFast16
asmClearScreenFast16:
;@R0 = scr
;@R1 = starty
;@R2 = endy
;@R3 = col
stmfd R13!,{R4-R11}
sub R12,R2,R1
add R12,R12,#1
;@R12 = endy-starty+1
mov r2,#320
mul r1,r2,r1
;@R1 = 320*starty
add R0,R0,R1,lsl #1
;@R0 = screen + ((320*starty)<<1)
mov R2,R3
mov R4,R3
mov R5,R3
mov R6,R3
mov R7,R3
mov R8,R3
mov R9,R3
2:
stmia R0!,{R2,R3,R4,R5,R6,R7,R8,R9}
stmia R0!,{R2,R3,R4,R5,R6,R7,R8,R9}
stmia R0!,{R2,R3,R4,R5,R6,R7,R8,R9}
stmia R0!,{R2,R3,R4,R5,R6,R7,R8,R9}
stmia R0!,{R2,R3,R4,R5,R6,R7,R8,R9}
stmia R0!,{R2,R3,R4,R5,R6,R7,R8,R9}
stmia R0!,{R2,R3,R4,R5,R6,R7,R8,R9}
stmia R0!,{R2,R3,R4,R5,R6,R7,R8,R9}
stmia R0!,{R2,R3,R4,R5,R6,R7,R8,R9}
stmia R0!,{R2,R3,R4,R5,R6,R7,R8,R9}
stmia R0!,{R2,R3,R4,R5,R6,R7,R8,R9}
stmia R0!,{R2,R3,R4,R5,R6,R7,R8,R9}
stmia R0!,{R2,R3,R4,R5,R6,R7,R8,R9}
stmia R0!,{R2,R3,R4,R5,R6,R7,R8,R9}
stmia R0!,{R2,R3,R4,R5,R6,R7,R8,R9}
stmia R0!,{R2,R3,R4,R5,R6,R7,R8,R9}
add r0,r0,#32*4
subs R12,R12,#1
bne 2b
ldmfd R13!,{R4-R11}
mov PC,LR
asmClearScreenFast8:
;R0 = scr
;R1 = starty
;R2 = endy
;R3 = col
stmfd R13!,{R4-R11}
sub R12,R2,R1
add R12,R12,#1
;@R12 = endy-starty+1
mov r2,#320
mul r1,r2,r1
;@R1 = 320*starty
add R0,R0,R1
;@R0 = screen + ((320*starty))
mov R2,R3
mov R4,R3
mov R5,R3
mov R6,R3
mov R7,R3
mov R8,R3
mov R9,R3
2:
stmia R0!,{R2,R3,R4,R5,R6,R7,R8,R9}
stmia R0!,{R2,R3,R4,R5,R6,R7,R8,R9}
stmia R0!,{R2,R3,R4,R5,R6,R7,R8,R9}
stmia R0!,{R2,R3,R4,R5,R6,R7,R8,R9}
stmia R0!,{R2,R3,R4,R5,R6,R7,R8,R9}
stmia R0!,{R2,R3,R4,R5,R6,R7,R8,R9}
stmia R0!,{R2,R3,R4,R5,R6,R7,R8,R9}
stmia R0!,{R2,R3,R4,R5,R6,R7,R8,R9}
stmia R0!,{R2,R3,R4,R5,R6,R7,R8,R9}
stmia R0!,{R2,R3,R4,R5,R6,R7,R8,R9}
subs R12,R12,#1
bne 2b
ldmfd R13!,{R4-R11}
mov PC,LR
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