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(brainfuck.tal) Optimized

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neauoire 2022-02-15 10:24:11 -08:00
parent c982eb988b
commit 85a6d348ba
1 changed files with 22 additions and 39 deletions
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61
projects/examples/exercises/brainfuck.tal
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@ -1,57 +1,39 @@
( brainfuck interpreter )
%!~ { NEQk NIP }
%DEC { #01 SUB }
%DEC2 { #0001 SUB2 }
%DECr { LITr 01 SUBr }
%RTN { JMP2r }
%HALT { #0101 #0e DEO2 }
%EMIT { #18 DEO }
%MEMORY { #8000 }
|0000
@ptr $2
|0100 ( -> )
MEMORY .ptr STZ2
;memory
;program
&while
LDAk ,op JSR
( Move the pointer to the right )
LDAk LIT '> NEQ ,&movr JCN [ SWP2 INC2 SWP2 ] &movr
( Move the pointer to the left )
LDAk LIT '< NEQ ,&movl JCN [ SWP2 DEC2 SWP2 ] &movl
( Increment the memory cell at the pointer )
LDAk LIT '+ NEQ ,&incr JCN [ OVR2 STH2k LDA INC STH2r STA ] &incr
( Decrement the memory cell at the pointer )
LDAk LIT '- NEQ ,&decr JCN [ OVR2 STH2k LDA DEC STH2r STA ] &decr
( Output the character signified by the cell at the pointer )
LDAk LIT '. NEQ ,&emit JCN [ OVR2 LDA EMIT ] &emit
( Jump past the matching ] if the cell at the pointer is 0 )
LDAk LIT '[ NEQ ,&next JCN [ ,goto-next JSR ] &next
( Jump back to the matching [ if the cell at the pointer is nonzero )
LDAk LIT '] NEQ ,&prev JCN [ ,goto-back JSR ] &prev
INC2 LDAk ,&while JCN
POP2
HALT
BRK
@op ( op -- )
( Move the pointer to the right )
LIT '> !~ ,&movr JCN [ .ptr LDZ2k INC2 ROT STZ2 POP RTN ] &movr
( Move the pointer to the left )
LIT '< !~ ,&movl JCN [ .ptr LDZ2k DEC2 ROT STZ2 POP RTN ] &movl
( Increment the memory cell at the pointer )
LIT '+ !~ ,&incr JCN [ .ptr LDZ2 STH2k LDA INC STH2r STA POP RTN ] &incr
( Decrement the memory cell at the pointer )
LIT '- !~ ,&decr JCN [ .ptr LDZ2 STH2k LDA DEC STH2r STA POP RTN ] &decr
( Output the character signified by the cell at the pointer )
LIT '. !~ ,&emit JCN [ .ptr 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
RTN
@goto-next ( -- )
.ptr LDZ2 LDA #00 EQU JMP RTN
OVR2 LDA #00 EQU JMP JMP2r
( depth ) LITr 00
INC2
&loop
@ -64,12 +46,11 @@ RTN
&end
( depth ) POPr
RTN
JMP2r
@goto-back ( -- )
.ptr LDZ2 LDA #00 NEQ JMP RTN
OVR2 LDA #00 NEQ JMP JMP2r
( depth ) LITr 00
DEC2
&loop
@ -82,11 +63,13 @@ RTN
&end
( depth ) POPr
RTN
JMP2r
@program ( Hello World! )
"++++++++[>++++[>++>+++>+++>+<<<<
"-]>+>+>->>+[<]<-]>>.>---.+++++++
"..+++.>>.<-.<.+++.------.-------
"-.>>+.>++.
"-.>>+.>++. $1
@memory