mirror of https://git.sr.ht/~rabbits/drifblim
Minor optimization
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neauoire
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@ -2,7 +2,7 @@
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[Drifblim](https://wiki.xxiivv.com/drifblim) is a uxntal assembler, written in [Uxntal](https://wiki.xxiivv.com/site/uxntal.html).
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The assembler is written in Uxntal itself, it's designed to be distributed as a rom to help bootstrap the uxn ecosystem. The goal is for Driflim to be as small it could possibly be made, and to release it as a print-friendly document, along with its source code and the mathematical definition of the Uxn virtual machine.
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The assembler is written in less than 400 lines of Uxntal, it's designed to help bootstrap the Uxn ecosystem and to demonstrate the concept of a personal one-page computer concept. The goal is for Driflim's source code to be released as a print-friendly document, along with its assembled hexadecimal data and the napkin definition of the Uxn virtual machine.
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The Drifblim project also includes:
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@ -1,6 +1,6 @@
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( Drifblim - Usage: emulator drifblim.rom src/source.tal )
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( Drifblim - Usage: uxncli drifblim.rom src/source.tal )
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|10 @Console &vector $2 &read $1 &pad $5 &write $1 &error $1
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|10 @Console &vector $2 &read $1 &pad $5 &write $1 &err $1
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|a0 @File &vector $2 &success $2 &stat $2 &delete $1 &append $1 &name $2 &length $2 &read $2 &write $2
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|0000
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@ -9,10 +9,9 @@
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@token $30
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@scope $30
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@buf $30
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@sleep $1
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@sym &ptr $2
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@ref &ptr $2
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@p &ptr $2 &len $2
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@p &ptr $2 &len $2 &sleep $1
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|0100
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@ -37,9 +36,9 @@ BRK
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;&c
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DUP2 .File/read DEO2
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( comment )
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LDAk #28 NEQ ,&no-on JCN #01 .sleep STZ ,&no-cap JMP &no-on
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LDAk #29 NEQ ,&no-off JCN #00 .sleep STZ ,&no-cap JMP &no-off
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.sleep LDZ ,&no-cap JCN
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LDAk #28 NEQ ,&no-on JCN #01 .p/sleep STZ ,&no-cap JMP &no-on
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LDAk #29 NEQ ,&no-off JCN #00 .p/sleep STZ ,&no-cap JMP &no-off
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.p/sleep LDZ ,&no-cap JCN
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( listen )
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LDAk #21 LTH ,&no-put JCN LDAk ;token ;scap JSR2 STA &no-put
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LDAk #20 GTH ,&no-cap JCN ;token DUP2 ;find-token JSR2 #0030 ;mclr JSR2 &no-cap
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@ -56,8 +55,7 @@ BRK
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STH2r .File/name DEO2
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.p/len LDZ2 #0100 SUB2 .File/length DEO2
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;dst/clip .File/write DEO2
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( debug ) #010e DEO
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( halt ) #010f DEO
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( debug & halt ) #0101 #0e DEO2
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BRK
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&c $1
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@ -72,11 +70,10 @@ BRK
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LDAk LIT ', EQU ,&on-litrel JCN
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LDAk LIT '; EQU ,&on-litabs JCN
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LDAk LIT ': EQU ,&on-rawabs JCN
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;err/reslv ;print-error JSR2
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POP2r
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POP2r
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POP2r POP2r
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;err/reslv ;print-err JMP2
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JMP2r
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&on-litzp STH2r NIP STH2r ,&set-byte JMP
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&on-litrel STH2r STH2kr LDA2 SUB2 #0002 SUB2 NIP STH2r
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&set-byte LDA2 ;dst ADD2 STA POP2 JMP2r
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@ -92,7 +89,7 @@ JMP2r
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( test ) INC2k INC2 STH2kr ;scmp JSR2 ,&on-found JCN
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( go eol ) INC2 INC2 ;scap JSR2 INC2 INC2k INC2 LDA ,&while JCN
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POP2
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STH2r ;err/label ;print-error JSR2
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STH2r ;err/label ;print-err JSR2
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#0000
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JMP2r
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@ -116,9 +113,9 @@ JMP2r
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DUP2 ;is-opcode JSR2 ,&on-opcode JCN
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DUP2 ;slen JSR2 #0004 EQU2 ,&on-short JCN
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DUP2 ;slen JSR2 #0002 EQU2 ,&on-byte JCN
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;err/token ;print-error JSR2
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JMP2r
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;err/token ;print-err JMP2
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&on-opcode ;find-opcode JSR2 ;write-byte JMP2
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&on-short ;sshort JSR2 ;write-short JMP2
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&on-byte ;sbyte JSR2 ;write-byte JMP2
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@ -129,17 +126,17 @@ JMP2r
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DUP2 ;slen JSR2 #0004 EQU2 ,&on-short JCN
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DUP2 ;slen JSR2 #0002 EQU2 ,&on-byte JCN
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;err/lithx ;print-error JSR2
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JMP2r
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;err/lithx ;print-err JMP2
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&on-short ;sshort JSR2 ;write-litshort JMP2
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&on-byte ;sbyte JSR2 ;write-litbyte JMP2
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@set-scope ( token* -- name* )
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;scope STH2k #0030 ;mclr JSR2 DUP2 STH2r ;scpy JSR2
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;scope STH2k #0030 ;mclr JSR2 DUP2 STH2r
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JMP2r
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;scpy JMP2
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@do-padabs ( t* -- ) ;shex JSR2 .p/ptr STZ2 JMP2r
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@do-padrel ( t* -- ) ;shex JSR2 .p/ptr LDZ2 ADD2 .p/ptr STZ2 JMP2r
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@ -154,8 +151,6 @@ JMP2r
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@create-label ( name* -- )
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( LIT '@ #18 DEO DUP2 ;print JSR2 #20 #18 DEO OVR2 ;print-str JSR2 #0a #18 DEO )
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( write ref )
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.p/ptr LDZ2 ;syms .sym/ptr LDZ2 STH2k ADD2 STA2
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INC2r INC2r
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@ -176,8 +171,6 @@ JMP2r
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@create-reference ( name* addr* -- )
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( LIT '- #18 DEO DUP2 ;print JSR2 #2018 DEO [ STH ] OVR2 ;print-str JSR2 #0a18 DEO [ STHr ] )
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( addr )
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;refs .ref/ptr LDZ2 STH2k ADD2 STA2
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( rune )
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@ -196,9 +189,7 @@ JMP2r
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@write-litbyte ( byte -- )
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( LITk ) #80 SWP ,write-short JSR
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JMP2r
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( LITk ) #80 SWP ,write-short JMP
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@write-litshort ( short* -- )
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@ -216,7 +207,7 @@ JMP2r
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JMP2r
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@is-opcode ( string* -- bool )
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@is-opcode ( string* -- flag )
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DUP2 ;opcodes/brk ,scmp3 JSR ,find-opcode/on-brk JCN
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@ -249,7 +240,7 @@ JMP2r
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JMP2r
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@scmp3 ( a* b* -- bool )
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@scmp3 ( a[3]* b[3]* -- flag )
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LDA2k STH2 INC2 INC2 SWP2
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LDA2k STH2 INC2 INC2 EQU2r
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@ -323,7 +314,7 @@ JMP2r
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DUP2 ,slen JSR ADD2
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@scpy ( src* dst* -- )
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STH2
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&while
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LDAk STH2kr STA INC2r
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@ -347,7 +338,7 @@ JMP2r
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JMP2r
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@print-error ( token* error* -- )
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@print-err ( token* err* -- )
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LIT '! .Console/write DEO
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SWP2 ,print-str JSR #2018 DEO
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@ -361,8 +352,6 @@ JMP2r
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JMP2r
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( tables )
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@opcodes
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"LIT "INC "POP "DUP "NIP "SWP "OVR "ROT
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"EQU "NEQ "GTH "LTH "JMP "JCN "JSR "STH
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@ -371,16 +360,12 @@ JMP2r
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&brk "BRK
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@err
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&lithx "LITHX $1 &label "LABEL $1
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&token "TOKEN $1 &reslv "RESLV $1
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&lithx "LITHX $1 &label "LABEL $1 &token "TOKEN $1 &reslv "RESLV $1
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@runes
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'| :do-padabs '$ :do-padrel
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'@ :do-plabel '& :do-slabel
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'. :do-litbyt ', :do-litbyt
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'; :do-litabs ': :do-rawabs
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'' :do-rawchr '" :do-rawstr
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'[ :do-ignore '] :do-ignore
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'| :do-padabs '$ :do-padrel '@ :do-plabel '& :do-slabel
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'. :do-litbyt ', :do-litbyt '; :do-litabs ': :do-rawabs
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'' :do-rawchr '" :do-rawstr '[ :do-ignore '] :do-ignore
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'# :do-lithex &end
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( buffers )
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