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(brainfuck.tal) Minor cleanup

This commit is contained in:
Devine Lu Linvega 2021-11-13 10:57:54 -05:00
parent 7d74fa95f0
commit 92b5624e2f
1 changed files with 7 additions and 10 deletions
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17
projects/examples/exercises/brainfuck.tal
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@ -28,24 +28,21 @@
BRK
(
> Move the pointer to the right
< Move the pointer to the left
+ Increment the memory cell at the pointer
- Decrement the memory cell at the pointer
[ Jump past the matching ] if the cell at the pointer is 0
] Jump back to the matching [ if the cell at the pointer is nonzero
, Input a character and store it in the cell at the pointer
. Output the character signified by the cell at the pointer )
@op ( op -- )
( Move the pointer to the right )
LIT '> !~ ,&movr JCN [ .pointer LDZ2k INC2 ROT STZ2 POP RTN ] &movr
( Move the pointer to the left )
LIT '< !~ ,&movl JCN [ .pointer LDZ2k DEC2 ROT STZ2 POP RTN ] &movl
( Increment the memory cell at the pointer )
LIT '+ !~ ,&incr JCN [ .pointer LDZ2 STH2k LDA INC STH2r STA POP RTN ] &incr
( Decrement the memory cell at the pointer )
LIT '- !~ ,&decr JCN [ .pointer LDZ2 STH2k LDA DEC STH2r STA POP RTN ] &decr
( Output the character signified by the cell at the pointer )
LIT '. !~ ,&emit JCN [ .pointer LDZ2 LDA EMIT POP RTN ] &emit
( Jump past the matching ] if the cell at the pointer is 0 )
LIT '[ !~ ,&next JCN [ POP ,goto-next JSR RTN ] &next
( Jump back to the matching [ if the cell at the pointer is nonzero )
LIT '] !~ ,&prev JCN [ POP ,goto-back JSR RTN ] &prev
POP