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(asma) Add tail call optimisation, bringing it up-to-date with uxnasm

This commit is contained in:
Andrew Alderwick 2022-06-08 00:10:24 +01:00
parent 9f97976ac8
commit 9ae2c0b788
1 changed files with 38 additions and 11 deletions
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49
projects/library/asma.tal
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@ -222,7 +222,7 @@
;asma-read-buffer DUP2 ;asma-read-buffer/end ROT2 SUB2 ( func* line^ filename* buf* size^ )
ROT2 ( func* line^ buf* size^ filename* )
,file-read-chunks JSR
;asma-flush-lit JSR2
;asma-flush-held JSR2
asma-IF-ERROR ,&error JCN
@ -348,7 +348,7 @@
@asma [
&pass $1 &state $1 &line $2 &lines $2 &break $1 &eof $1
&comment-level $1
&token $2 &orig-token $2 &lit $1 &lit-present $1
&token $2 &orig-token $2 &lit $1 &lit-present $1 &jsr $1
&addr $2 &written-addr $2 &flush-fn $2
&src-filename $2 &dest-filename $2
&error $2 &log-level $1
@ -518,6 +518,7 @@
@asma-write-lit ( byte -- )
;asma/lit LDA2 ,&present JCN
,asma-flush-held JSR
POP #01 ;asma/lit STA2
;asma/addr LDA2k INC2 INC2 SWP2 STA2
JMP2r
@ -529,18 +530,26 @@
#0000 ;asma/lit STA2
JMP2r
@asma-flush-lit ( -- )
;asma/lit LDA2 ,&present JCN
POP JMP2r
&present
@asma-flush-held ( -- )
;asma/lit LDA2 ,&lit-present JCN
POP ,&part2 JMP
&lit-present
;asma/addr LDA2k #0002 SUB2 SWP2 STA2
LIT LIT ,asma-write-byte/raw JSR
,asma-write-byte/raw JSR
#0000 ;asma/lit STA2
&part2
;asma/jsr LDA DUP ,&jsr-present JCN
POP JMP2r
&jsr-present
;asma/addr LDA2k #0001 SUB2 SWP2 STA2
,asma-write-byte/raw JSR
#00 ;asma/jsr STA
JMP2r
@asma-write-byte ( byte -- )
,asma-flush-lit JSR
,asma-flush-held JSR
&raw
;asma/addr LDA2 ;asma/written-addr LDA2
LTH2k ,&rewound JCN
@ -659,7 +668,7 @@
JMP2r
@asma-label-define
;asma-flush-lit JSR2
;asma-flush-held JSR2
;asma-trees/labels ,asma-label-helper JSR
,&already-existed JCN
@ -670,7 +679,7 @@
JMP2r
@asma-sublabel-define
;asma-flush-lit JSR2
;asma-flush-held JSR2
;asma-trees/scope LDA2 ,asma-label-helper JSR
POP POP2
JMP2r
@ -700,11 +709,11 @@
#00 JMP2r
@asma-pad-absolute
;asma-flush-lit JSR2
;asma-flush-held JSR2
#0000 ,asma-pad-helper JMP
@asma-pad-relative
;asma-flush-lit JSR2
;asma-flush-held JSR2
;asma/addr LDA2
( fall through )
@ -850,8 +859,26 @@
@asma-normal-body
;asma-parse-opcode JSR2 ,&not-opcode JCN
DUP [ LIT JSR ] EQU ,&hold-jsr JCN
DUP [ LIT JSR2 ] EQU ,&hold-jsr JCN
DUP [ LIT JMP2r ] NEQ ,&write-opcode JCN
;asma/jsr LDA ,&optimise-jsr-jmp2r JCN
&write-opcode
;asma-write-byte JMP2 ( tail call )
&hold-jsr
;asma-flush-held JSR2
;asma/jsr STA
;asma/addr LDA2k INC2 SWP2 STA2
JMP2r
&optimise-jsr-jmp2r
POP
;asma/jsr LDAk #00 SWP2 STA
#e0 AND [ LIT JMP ] ORA
;asma/addr LDA2k #0001 SUB2 SWP2 STA2
,&write-opcode JMP
&not-opcode
#01 ;asma-parse-hex-string JSR2 JMP
( hex invalid ) ,&not-hex JMP