Browse code
Added brainfuck.tal
Devine Lu Linvega authored on 13/11/2021 02:51:39
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+( brainfuck interpreter ) |
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+ |
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+%!~ { NEQk NIP }
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+%DEC { #01 SUB }
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+%DEC2 { #0001 SUB2 }
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+%DECr { LITr 01 SUBr }
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+%RTN { JMP2r }
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+%HALT { #0101 #0e DEO2 }
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+%EMIT { #18 DEO }
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+ |
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+%MEMORY { #8000 }
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+ |
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+|0000 |
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+ |
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+@pointer $2 |
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+ |
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+|0100 ( -> ) |
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+ |
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+ MEMORY .pointer STZ2 |
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+ |
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+ ;program |
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+ &while |
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+ LDAk ,op JSR |
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+ INC2 LDAk ,&while JCN |
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+ POP2 |
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+ |
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+ HALT |
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+ |
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+BRK |
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+ |
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+( |
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+ > Move the pointer to the right |
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+ < Move the pointer to the left |
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+ + Increment the memory cell at the pointer |
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+ - Decrement the memory cell at the pointer |
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+ [ Jump past the matching ] if the cell at the pointer is 0 |
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+ ] Jump back to the matching [ if the cell at the pointer is nonzero |
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+ , Input a character and store it in the cell at the pointer |
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+ . Output the character signified by the cell at the pointer ) |
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+ |
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+@op ( op -- ) |
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+ |
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+ LIT '> !~ ,&right JCN |
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+ .pointer LDZ2k INC2 ROT STZ2 |
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+ POP RTN &right |
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+ LIT '< !~ ,&left JCN |
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+ .pointer LDZ2k DEC2 ROT STZ2 |
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+ POP RTN &left |
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+ LIT '+ !~ ,&inc JCN |
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+ .pointer LDZ2 STH2k LDA INC STH2r STA |
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+ POP RTN &inc |
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+ LIT '- !~ ,&dec JCN |
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+ .pointer LDZ2 STH2k LDA DEC STH2r STA |
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+ POP RTN &dec |
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+ LIT '. !~ ,&emit JCN |
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+ .pointer LDZ2 LDA EMIT |
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+ POP RTN &emit |
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+ LIT '[ !~ ,&next JCN |
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+ POP ,goto-next JSR |
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+ RTN &next |
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+ LIT '] !~ ,&prev JCN |
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+ POP ,goto-back JSR |
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+ RTN &prev |
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+ POP |
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+ |
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+RTN |
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+ |
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+@goto-next ( -- ) |
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+ |
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+ .pointer LDZ2 LDA #00 EQU JMP RTN |
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+ |
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+ ( depth ) LITr 00 |
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+ INC2 |
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+ &loop |
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+ LDAk LIT '[ NEQ ,&no-depth JCN |
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+ INCr |
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+ &no-depth |
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+ LDAk LIT '] NEQ ,&no-end JCN |
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+ STHkr #00 EQU ,&end JCN |
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+ DECr |
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+ &no-end |
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+ INC2 LDAk ,&loop JCN |
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+ &end |
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+ ( depth ) POPr |
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+ |
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+RTN |
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+ |
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+@goto-back ( -- ) |
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+ |
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+ .pointer LDZ2 LDA #00 NEQ JMP RTN |
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+ |
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+ ( depth ) LITr 00 |
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+ DEC2 |
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+ &loop |
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+ LDAk LIT '] NEQ ,&no-depth JCN |
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+ INCr |
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+ &no-depth |
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+ LDAk LIT '[ NEQ ,&no-end JCN |
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+ STHkr #00 EQU ,&end JCN |
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+ DECr |
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+ &no-end |
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+ DEC2 LDAk ,&loop JCN |
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+ &end |
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+ ( depth ) POPr |
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+ |
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+RTN |
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+ |
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+@program ( Hello World! ) |
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+ |
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+ 2b 2b 2b 2b 2b 2b 2b 2b 5b 3e 2b 2b 2b 2b 5b 3e |
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+ 2b 2b 3e 2b 2b 2b 3e 2b 2b 2b 3e 2b 3c 3c 3c 3c |
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+ 2d 5d 3e 2b 3e 2b 3e 2d 3e 3e 2b 5b 3c 5d 3c 2d |
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+ 5d 3e 3e 2e 3e 2d 2d 2d 2e 2b 2b 2b 2b 2b 2b 2b |
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+ 2e 2e 2b 2b 2b 2e 3e 3e 2e 3c 2d 2e 3c 2e 2b 2b |
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+ 2b 2e 2d 2d 2d 2d 2d 2d 2e 2d 2d 2d 2d 2d 2d 2d |
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+ 2d 2e 3e 3e 2b 2e 3e 2b 2b 2e 0a |
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+ |