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Copy pathbrainfuck.oct
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brainfuck.oct
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LJMP trampoline NZP
code:
BYTES "++++++++[>++++[>++>+++>+++>+<<<<-]>+>+>->>+[<]<-]>>.>---.+++++++..+++.>>.<-.<.+++.------.--------.>>+.>++."
;BYTES ".[-]>."
;BYTES ".>.>.>.>.>"
BYTE 0x0
trampoline:
LJMP start NZP
data:
BYTE 0x0
BYTE 0x0
BYTE 0x0
BYTE 0x0
BYTE 0x0
BYTE 0x0
BYTE 0x0
BYTE 0x0
BYTE 0x0
BYTE 0x0
BYTE 0x0
BYTE 0x0
BYTE 0x0
BYTE 0x0
BYTE 0x0
BYTE 0x0
BYTE 0x0
BYTE 0x0
BYTE 0x0
BYTE 0x0
BYTE 0x0
BYTE 0x0
start:
LAA R2, R1, code
LAA R2, R3, data
; -1 is 0xFF
; R2 is program counter
; R3 is data pointer
; 0x3E = > Increment data pointer
; 0x3C = < Decrement data pointer
; 0x2B = + Increment byte at R3
; 0x2D = - Decrement byte at R3
; 0x2E = . OUT [R3], 1
; 0x2C = , IN [R3], 1
; 0x5b = [
; 0x5d = ]
bf:
XOR R2, R2
LOAD R2, R1
MOV R2, R0
LOADI 0xC2 ; -3E
ADD R0, R2
LJMP handleIncData Z
LOADI 0xC4 ; -3C
ADD R0, R2
LJMP handleDecData Z
LOADI 0xD2 ; -2E
ADD R0, R2
LJMP handlePrint Z
LOADI 0xD5 ; -2B
ADD R0, R2
LJMP handleInc Z
LOADI 0xD3 ; -2B
ADD R0, R2
LJMP handleDec Z
LOADI 0xA5 ; -5B
ADD R0, R2
LJMP handleOpenBrace Z
LOADI 0xA3 ; -5D
ADD R0, R2
LJMP handleCloseBrace Z
XOR R0, R0 ; NUL byte -> exit
ADD R0, R2
LJMP exit Z
LJMP incProg NZP
exit:
HALT
incProg:
LOADI 0x01
ADD R1, R0
LJMP bf NZP
handleIncData:
LOADI 0x01
ADD R3, R0
LJMP incProg NZP
handleDecData:
LOADI 0xFF
ADD R3, R0
LJMP incProg NZP
handleInc:
XOR R2, R2
LOAD R2, R3
OUT R1, 0 ; Push program counter
MOV R1, R0
LOADI 0x01
ADD R0, R1
STORE R2, R3
IN R1, 0 ; Pop program counter
LJMP incProg NZP
handleDec:
XOR R2, R2
LOAD R2, R3
OUT R1, 0 ; Push program counter
MOV R1, R0
LOADI 0xFF
ADD R0, R1
STORE R2, R3
IN R1, 0 ; Pop program counter
LJMP incProg NZP
handleOpenBrace:
XOR R2, R2
LOAD R2, R3
AND R0, R0
LJMP incProg NP
OUT R3, 0
; Find next matching ]
LOADI 0x01
MOV R3, R0
openBraceLoop:
LOADI 0x01
ADD R1, R0
XOR R2, R2
LOAD R2, R1
MOV R2, R0
; R2 = [R1]
LOADI 0xA5 ; -5B
ADD R0, R2
LJMP openBraceInc Z
LOADI 0xA3 ; -5D
ADD R0, R2
LJMP openBraceDec Z
LJMP openBraceLoop NZP
openBraceInc:
LOADI 0x01
ADD R3, R0
LJMP openBraceLoop NZP
openBraceDec:
LOADI 0xFF
ADD R3, R0
LJMP exitBraceLoop Z
LJMP openBraceLoop NZP
exitBraceLoop:
IN R3, 0
LJMP incProg NZP
handleCloseBrace:
XOR R2, R2
LOAD R2, R3
AND R0, R0
LJMP incProg Z
OUT R3, 0
; Find prev matching [
LOADI 0x01
MOV R3, R0
closeBraceLoop:
LOADI 0xFF
ADD R1, R0
XOR R2, R2
LOAD R2, R1
MOV R2, R0
; R2 = [R1]
LOADI 0xA3 ; -5D
ADD R0, R2
LJMP closeBraceInc Z
LOADI 0xA5 ; -5B
ADD R0, R2
LJMP closeBraceDec Z
LJMP closeBraceLoop NZP
closeBraceInc:
LOADI 0x01
ADD R3, R0
LJMP closeBraceLoop NZP
closeBraceDec:
LOADI 0xFF
ADD R3, R0
LJMP exitBraceLoop Z
LJMP closeBraceLoop NZP
handlePrint:
XOR R2, R2
LOAD R2, R3
OUT R0, 1
LJMP incProg NZP