cleanup, flow control immediate words
This commit is contained in:
parent
04416807fc
commit
c01f114655
6
asm.jrt
6
asm.jrt
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@ -56,6 +56,7 @@ array oparg2 3 cells allot
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target @ >r encode-op <r target @ =
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if s" invalid argument types" operror then ;
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: oparg-complete!
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dbg" oparg-complete!"
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opargs-remaining @ dup if
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1 - dup opargs-remaining !
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if arg2
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@ -236,6 +237,7 @@ var ignoreimm
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1 :op LOOP 0xe2 >short-jmp* ;
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1 :op JCXZ 0xe3 >short-jmp* ;
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1 :op JMP
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dbg" JMP!"
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0xe9 >near-reljmp*
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0xeb >short-jmp*
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0xea >far-jmp*
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@ -311,7 +313,9 @@ var ignoreimm
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0 0xc6 >extbmem*
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0 0xc7 >extmem*
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then
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oparg-segreg? if oparg-val @ 0x8e arg2 >extwreg|mem* arg1 then ;
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oparg-segreg? if oparg-val @ 0x8e arg2 >extwreg|mem* arg1 then
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arg2 oparg-segreg? if oparg-val @ 0x8c arg1 >extwreg|mem* then ;
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2 :op ADD 0x00 >6group-math* 0 >grp1* ;
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2 :op ADC 0x10 >6group-math* 2 >grp1* ;
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2 :op AND 0x20 >6group-math* 4 >grp1* ;
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7
boot.jor
7
boot.jor
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@ -1,5 +1,8 @@
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0 const 0
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1 const 1
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: 1+ 1 + ;
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: 1- 1 - ;
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2 const cell
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: cells cell * ;
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@ -7,11 +10,11 @@
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13 const '\r'
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key const sp
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0x100 const F_IMMEDIATE
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: cr '\n' emit ;
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: bl sp emit ;
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0x100 const F_IMMEDIATE
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: if ' BZ_ , here 0 , ; immediate
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: else ' GOTO_ , 0 , here swap ! here cell - ; immediate
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: then here swap ! ; immediate
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4
defs.jrt
4
defs.jrt
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@ -58,8 +58,6 @@
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: break rswap rdrop :| yield done |; execute rswap ;
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: links begin yield @ dup not until drop ;done
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: files findfile begin dup while yield nextfile repeat drop ;done
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: .files files each type s" " type more ;
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: min ( x y -- x|y ) 2dup > if swap then drop ;
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: max ( x y -- x|y ) 2dup < if swap then drop ;
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@ -83,5 +81,5 @@
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dup 0 >= over 9 <= and if [ key 0 lit ]
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else 10 - [ key A lit ] then + emit ;
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: .bhex dup 0xf0 & 4 >> .hexnib 0x0f & .hexnib bl ;
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: .hex dup 0xf000 & 12 >> .hexnib dup 0x0f00 & 8 >> .hexnib .bhex ;
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: .hex dup 0xf000 & 12 >> 0x0f & .hexnib dup 0x0f00 & 8 >> .hexnib .bhex ;
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BIN
tinyjort.com
BIN
tinyjort.com
Binary file not shown.
158
tinyjort.jrt
158
tinyjort.jrt
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@ -14,8 +14,8 @@ dbg" assembling..."
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increment the instruction pointer.
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)
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JMP 9 @>
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JMP dbg" JMP" 9 @>
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dbg" first jmp"
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: NEXT
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LODSW
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MOV BX AX
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@ -47,6 +47,7 @@ L: LATEST 0 w>t
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: DICTLIST ( word -- tptr ) b@ BUCKETMASK & cells [ L@ DICTIONARY lit ] + ;
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: strlen ( word -- len ) 0 swap begin dup b@ while swap 1+ swap 1+ repeat drop ;
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: str>t ( word -- ) begin dup b@ dup while >t 1+ repeat >t drop ;
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: patchpt ( -- tptr ) target @ 0 w>t ;
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: patch!t ( tptr -- ) target @ swap !t ;
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: link>t ( tptr-head -- ) dup @t swap patch!t w>t ;
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: DEF target @ [ L@ LATEST lit ] !t
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@ -111,6 +112,14 @@ L@ $$VAR CONST $DOVAR
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MOV BX @[ BX]
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JMP @[ BX]
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:CP $DOCREATE
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MOV @[ BP] SI
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INC BP INC BP
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INC BX INC BX
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MOV SI BX
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INC BX INC BX PUSH BX
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NEXT
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:ASM LIT_
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LODSW
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PUSH AX
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@ -236,12 +245,20 @@ dbg" math"
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PUSH AX
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NEXT
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:ASM 1+
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POP AX INC AX PUSH AX
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NEXT
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:ASM -
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POP BX POP AX
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SUB AX BX
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PUSH AX
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NEXT
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:ASM 1-
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POP AX DEC AX PUSH AX
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NEXT
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:ASM *
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POP BX POP AX
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IMUL BX
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@ -260,7 +277,7 @@ L: RETFALSE
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:ASM not
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POP AX
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CMP AX 0 #
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OR AX AX
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JZ RETTRUE
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JMP RETFALSE
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@ -274,23 +291,23 @@ L: RETFALSE
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:ASM <
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POP AX
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POP BX
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CMP AX BX
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CMP BX AX
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JL RETTRUE
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JMP RETFALSE
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:ASM >
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POP AX
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POP BX
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CMP AX BX
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CMP BX AX
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JG RETTRUE
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JMP RETFALSE
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:ASM and
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POP AX
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POP BX
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CMP AX 0 #
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OR AX AX
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JZ RETFALSE
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CMP BX 0 #
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OR BX BX
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JZ RETFALSE
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JMP RETTRUE
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@ -393,6 +410,13 @@ dbg" mem"
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MOV @[ ES: BX] AL
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NEXT
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:ASM +!
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POP BX
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POP AX
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ADD AX @[ BX]
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MOV @[ BX] AX
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NEXT
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dbg" return stack"
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:ASM >r
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POP @[ BP]
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@ -453,6 +477,7 @@ dbg" allocation"
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:t allot here + here! ;
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:t , here ! cell allot ;
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:t b, here b! 1 allot ;
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: t" begin key dup [ key " lit ] != while >t repeat drop 0 >t ;
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dbg" i/o"
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:ASM overwrite
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@ -511,6 +536,14 @@ dbg" i/o"
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NEXT
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DEFERRED emit console-emit
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:t cr 10 emit 13 emit ;
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:t bl LIT_ [ key w>t ] emit ;
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:t type
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[ target @ ] dup b@ dup BZ_ [ patchpt ]
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emit 1+ GOTO_ [ swap w>t patch!t ]
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drop drop ;
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:ASM console-key
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MOV AH 8 #
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INT 0x21 #
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@ -518,10 +551,23 @@ DEFERRED emit console-emit
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PUSH AX
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NEXT
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127 const INBUFSIZE
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INBUFSIZE CONST INBUFSIZE
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ARRAY inbuf INBUFSIZE 1+ ALLOT
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t& inbuf VAR, inptr
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:t buf-key inptr @ b@ dup BZ_ [ patchpt ] inptr @ 1+ inptr ! [ patch!t ] ;
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0 VAR, infile ( 0 is a predefined file handle meaning stdin )
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( TODO: whoops, this always calls fgetc, which works way better )
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:t in-key infile @ dup BZ_ [ 3 skip>t ] drop console-key return fgetc ;
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DEFERRED key in-key
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:t stdin-key
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buf-key dup BZ_ [ 1 skip>t ] return drop
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( if buffer is empty, refresh from file )
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INBUFSIZE inbuf 0 fread
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( if there's any more data, start returning it )
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fcount @ dup BZ_ [ patchpt ] inbuf + 0 swap b! inbuf inptr ! buf-key return
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( otherwise, EOF ) [ patch!t ] drop EOF ;
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:t file-key infile @ dup BZ_ [ patchpt ] fgetc return
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[ patch!t ] drop stdin-key ;
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DEFERRED key file-key
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dbg" parsing"
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L: BASE 10 w>t L: ISNEG? 0 >t
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@ -546,7 +592,7 @@ L: next-digit
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MOV BL AL
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LODSB
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XCHG AL BL
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CMP BL 0 #
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OR BL BL
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JZ 1 @> ( string end )
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JCXZ 3 @> ( starts with negative? )
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L: parse-digit
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@ -587,7 +633,7 @@ L: fail-digit 0 <:
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JNZ 0 @>
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CMP CX 1 # ( x is second character )
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JNZ 1 @>
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CMP AX 0 # ( first character was a 0 )
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OR AX AX ( first character was a 0 )
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JNZ 2 @>
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MOV BASE 16 #
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JMP next-digit
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@ -597,7 +643,7 @@ L: fail-digit 0 <:
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ADD BL 10 #
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CMP BL BASE
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JL parsed-digit
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SUB BL key a key A - 10 - #
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SUB BL key a key A - 10 + #
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JL fail-digit
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ADD BL 10 #
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CMP BL BASE
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@ -607,9 +653,11 @@ L: fail-digit 0 <:
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L: DECDIVISORS 1 w>t 10 w>t 100 w>t 1000 w>t 10000 w>t
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L: NUMBUF 7 ALLOT ( 5 digits, - sign, ending null )
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:ASM num>str
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MOV AX DS
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MOV ES AX
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MOV DI L@ NUMBUF #
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POP AX
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CMP AX 0 #
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OR AX AX
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JGE 0 @>
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MOV BYTE @[ DI] key - #
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NEG AX
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@ -622,7 +670,7 @@ L: NUMBUF 7 ALLOT ( 5 digits, - sign, ending null )
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L: write-next-digit
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XOR DX DX
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IDIV @[ BX+SI]
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CMP AX 0 #
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OR AX AX
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JNZ 1 @>
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JCXZ 0 @> ( unconditionally write a zero )
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DEC CX ( if we haven't written any digits this will hit 0 on the ones place )
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@ -643,11 +691,7 @@ L: write-next-digit
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PUSH DI
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NEXT
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:t type [ target @ ]
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dup b@ dup BZ_ [ 6 skip>t ]
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emit 1 + GOTO_ [ w>t ]
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drop drop ;
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:t . num>str type LIT_ [ key w>t ] emit ;
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:t . num>str type bl ;
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:ASM whitespace?
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POP AX
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@ -668,7 +712,7 @@ L: write-next-digit
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:ASM eoi? ( end of input )
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POP AX
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CMP AX 0 # ( null )
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OR AX AX ( null )
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JZ 0 @>
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CMP AX -1 # ( EOF )
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JNZ 1 @>
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@ -687,8 +731,9 @@ L: write-next-digit
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( if whitespace or eoi, end ) BZ_ [ 5 skip>t ] drop 0 b, return
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( otherwise, write byte and continue ) b, key GOTO_ [ w>t ] ;
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ARRAY wordbuf 48 ALLOT
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:t redir-here ( cp buf -- buf ) here >r dup >r here! execute <r <r here! ;
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:t word LIT_ word, wordbuf redir-here ;
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:t redir-, ( cp buf -- buf ) here >r dup >r here! execute <r <r here! ;
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:t tmp-, ( cp -- buf ) here redir-, ;
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:t word LIT_ word, wordbuf redir-, ;
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dbg" compiler"
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:t wordflags cell + ;
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@ -699,7 +744,7 @@ dbg" compiler"
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:t new-word
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( set latest ) here latest!
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( create entry ) 0 dup , ,
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( save word + calc length ) here word, here swap -
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( save word + calc length ) here word, here swap - 1- ( ignore null )
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( save length ) latest wordflags !
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( find bucket ) latest wordname dictbucket
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( link to prev ) dup @ latest !
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@ -709,9 +754,9 @@ dbg" compiler"
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0 swap [ target @ ] dup b@ BZ_ [ 3 skip>t ]
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2inc GOTO_ [ w>t ] drop ;
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: patchpt target @ 0 w>t ;
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:ASM dict-lookup ( name dict -- cp meta | name 0 )
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MOV AX DS
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MOV ES AX
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POP BX ( dictionary )
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POP DI ( name )
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( strlen - in DI: str, out CX: len, clobbers AX )
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@ -733,7 +778,7 @@ dbg" compiler"
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L: check-next-entry
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MOV BX @[ BX]
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CMP BX 0 #
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OR BX BX
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JZ 0 @>
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CMP CL @[ 2 @+ BX]
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JNZ check-next-entry
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@ -779,8 +824,9 @@ L: check-next-entry
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:t var new-word $DOVAR , 0 , ;
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:t interpretword ( cp meta -- ) F_IMMEDIATE & state not or
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BZ_ [ patchpt ] execute return [ patch!t ] , ;
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:t interpretnumber ( n -- n? ) state BZ_ [ patchpt ] LIT_ , , [ patch!t ] ;
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:t ?err ( word -- ) type LIT_ [ key ? w>t ] emit 13 emit ;
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:t interpretnumber ( n -- n? ) state BZ_ [ patchpt ] LIT_ LIT_ , , [ patch!t ] ;
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:t ?err ( word -- ) type LIT_ [ key ? w>t ] emit cr ;
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DEFERRED err ?err
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:t compileword ( word -- )
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lookup dup BZ_ [ patchpt ] interpretword return [ patch!t ]
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@ -790,13 +836,57 @@ DEFERRED err ?err
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[ target @ ] word dup b@ BZ_ [ patchpt ] compileword GOTO_ [ swap w>t ]
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[ patch!t ] drop ;
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dbg" flow control words and misc."
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:t if LIT_ BZ_ , here 0 , ; IMMEDIATE
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:t else LIT_ GOTO_ , 0 , here swap ! here cell - ; IMMEDIATE
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:t then here swap ! ; IMMEDIATE
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:t begin here ; IMMEDIATE
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:t while LIT_ BZ_ , here 0 , ; IMMEDIATE
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:t repeat LIT_ GOTO_ , swap , here swap ! ; IMMEDIATE
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:t again LIT_ GOTO_ , , ; IMMEDIATE
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:t until LIT_ BZ_ , , ; IMMEDIATE
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:t lit LIT_ LIT_ , , ;
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:t ( [ target @ ] key LIT_ [ key ) w>t ] = BZ_ [ w>t ] ; IMMEDIATE
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:t inline| LIT_ INLINEDATA_ , here 0 , ;
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:t |inline then ;
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:t :| inline| $DOCOLON , ; IMMEDIATE
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:t |; LIT_ return , |inline ; IMMEDIATE
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:t s", [ target @ ] key dup LIT_ [ key " w>t ] != over 0 != and
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BZ_ [ 3 skip>t ] b, GOTO_ [ w>t ]
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drop 0 b, ;
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:t s" state BZ_ [ patchpt ] inline| s", |inline return [ patch!t ]
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LIT_ s", tmp-, ; IMMEDIATE
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:t ' word lookup drop state BZ_ [ patchpt ] lit return [ patch!t ] ; IMMEDIATE
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:t loadfp ( fp -- fp )
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infile @ >r
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infile !
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interpreter
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infile @
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<r infile ! ;
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:t loadfile ( filename -- ) open loadfp close ;
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:t noop ;
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:t defer new-word $DODEFERRED , LIT_ noop , ;
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:t redefine ( cp cpdeferred ) cell + ! ;
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:t definition ( cpdeferred ) cell + @ ;
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:ASM sp+ss
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PUSH SP
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PUSH SS
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NEXT
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:t .s sp+ss swap >r 0x100 [ target @ ] 2 - dup r@ < BZ_
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( past top of stack ) [ 4 skip>t ] drop drop rdrop return
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2dup swap @far . GOTO_ [ w>t ] ;
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dbg" boot stub"
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:ASM debug NEXT
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: t" begin key dup [ key " lit ] != while >t repeat drop 0 >t ;
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ARRAY input t" 1 2 + ."
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t& input VAR, inptr
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:t keyinput inptr @ b@ dup . dup BZ_ [ patchpt ] inptr @ 1 + inptr ! [ patch!t ] ;
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( t' keyinput t& key !t )
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:t tinyjort interpreter terminate ;
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9 <: ( actual entry point )
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