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PDP-10.its/src/mudsys/eval.122
Adam Sampson a7399d0f9a Revert MUDSYS to match Muddle 106 source files. 
Looking at the backup dates for files in <mdl.int>, mdl106.exe is from
20th January 1981, whereas some of the source files are from a couple of
years later. Revert to the last version prior to 20th January 1981 -- in
every case, this was the earliest revision that was kept in <mdl.int>.

This undoes the changes that we'd previously made to these files, many
of which are no longer necessary now that we're using MIDAS 73.
2020-08-26 21:26:02 +01:00

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TITLE EVAL -- MUDDLE EVALUATOR
RELOCATABLE
; GERALD JAY SUSSMAN, 1971. REWRITTEN MANY TIMES SINCE C. REEVE (1972--1974)
.GLOBAL BINDID,LPROG,GLOBSP,GLOBASE,SPBASE,TPBASE,PTIME,SWAP,CHFRAM
.GLOBAL IGVAL,CHKARG,NXTDCL,TPOVFL,CHFRM,PROCHK,CHFSWP,VECBOT,TYPSGR
.GLOBAL ILVAL,ER1ARG,SPECBIND,MAKACT,SPECSTORE,MAKTUP,TPALOC,IBIND,SSPECS
.GLOBAL IDVAL,EVECTO,EUVECT,CHARGS,BCKTRK,CELL,ILOC,IGLOC,CHKDCL,SSPEC1
.GLOBAL PDLBUF,MESS,FACTI,CHKARG,MAKENV,PSTAT,BNDV,UNBOU,UNAS,IGDECL
.GLOBAL 1STEPR,SEGMNT,SEGLST,NAPT,EVTYPE,EVATYP,APTYPE,APLTYP,APLQ,IDVAL1
.GLOBAL TESTR,VALG,TYPG,INCR1,TMATCH,TYPMIS,SAT,MAKACT,NTPALO,SPECBND
.GLOBAL TPGROW,CHKAB,TYPSEG,NXTLM,MONCH0,CHFINI,RMONC0,IMPURIFY,ICONS,INCONS
.GLOBAL CILVAL,CISET,CIGVAL,CSETG,MAPPLY,CLLOC,CGLOC,CASSQ,CGASSQ,CBOUND
.GLOBAL IIGLOC,CHUNW,IUNWIN,UNWIN2,SPCCHK,CURFCN,TMPLNT,TD.LNT,TBINIT
.GLOBAL SPECBE,BSETG,GLOTOP,CANDP,CORP,TFA,TMA,DSTORE,PVSTOR,SPSTOR
.GLOBAL AGC,GVLINC,LVLINC,CGBOUN,IEVECT,MAKTU2,STOSTR,HIBOT,POPUNW,ISTRUC
.INSRT MUDDLE >
MONITOR
; ENTRY TO EXPAND A MACRO
MFUNCTION EXPAND,SUBR
ENTRY 1
MOVE PVP,PVSTOR+1
MOVEI A,PVLNT*2+1(PVP)
HRLI A,TFRAME
MOVE B,TBINIT+1(PVP)
HLL B,OTBSAV(B)
PUSH TP,A
PUSH TP,B
MOVEI B,-1(TP)
JRST AEVAL2
; MAIN EVAL ENTRANCE
IMFUNCTION EVAL,SUBR
ENTRY
MOVE PVP,PVSTOR+1
SKIPE C,1STEPR+1(PVP) ; BEING 1 STEPPED?
JRST 1STEPI ; YES HANDLE
EVALON: HLRZ A,AB ;GET NUMBER OF ARGS
CAIE A,-2 ;EXACTLY 1?
JRST AEVAL ;EVAL WITH AN ALIST
SEVAL: GETYP A,(AB) ;GET TYPE OF ARG
SKIPE C,EVATYP+1 ; USER TYPE TABLE?
JRST EVDISP
SEVAL1: CAIG A,NUMPRI ;PRIMITIVE?
JRST SEVAL2 ;YES-DISPATCH
SELF: MOVE A,(AB) ;TYPES WHICH EVALUATE
MOVE B,1(AB)
JRST EFINIS ;TO SELF-EG NUMBERS
SEVAL2: HRRO A,EVTYPE(A)
JRST (A)
; HERE FOR USER EVAL DISPATCH
EVDISP: ADDI C,(A) ; POINT TO SLOT
ADDI C,(A)
SKIPE (C) ; SKIP EITHER A LOSER OR JRST DISP
JRST EVDIS1 ; APPLY EVALUATOR
SKIPN C,1(C) ; GET ADDR OR GO TO PURE DISP
JRST SEVAL1
JRST (C)
EVDIS1: PUSH TP,(C)
PUSH TP,1(C)
PUSH TP,(AB)
PUSH TP,1(AB)
MCALL 2,APPLY ; APPLY HACKER TO OBJECT
JRST EFINIS
; EVAL DISPATCH TABLE
IF2,SELFS==400000,,SELF
DISTBL EVTYPE,SELFS,[[TFORM,EVFORM],[TLIST,EVLIST],[TVEC,EVECT],[TUVEC,EUVEC]
[TSEG,ILLSEG]]
;WATCH FOR SUBTLE BUG 43 LERR,LPROG OR BINDID
AEVAL:
CAIE A,-4 ;EXACTLY 2 ARGS?
JRST WNA ;NO-ERROR
GETYP A,2(AB) ;CHECK THAT WE HAVE A FRAME
CAIE A,TACT
CAIN A,TFRAME
JRST .+3
CAIE A,TENV
JRST TRYPRO ; COULD BE PROCESS
MOVEI B,2(AB) ; POINT TO FRAME
AEVAL2: PUSHJ P,CHENV ; HACK ENVIRONMENT CHANGE
AEVAL1: PUSH TP,(AB)
PUSH TP,1(AB)
MCALL 1,EVAL
AEVAL3: HRRZ 0,FSAV(TB)
CAIN 0,EVAL
JRST EFINIS
JRST FINIS
TRYPRO: CAIE A,TPVP ; SKIP IF IT IS A PROCESS
JRST WTYP2
MOVE C,3(AB) ; GET PROCESS
CAMN C,PVSTOR ; DIFFERENT FROM ME?
JRST SEVAL ; NO, NORMAL EVAL WINS
MOVE B,SPSTO+1(C) ; GET SP FOR PROCESS
MOVE D,TBSTO+1(C) ; GET TOP FRAME
HLL D,OTBSAV(D) ; TIME IT
MOVEI C,PVLNT*2+1(C) ; CONS UP POINTER TO PROC DOPE WORD
HRLI C,TFRAME ; LOOK LIK E A FRAME
PUSHJ P,SWITSP ; SPLICE ENVIRONMENT
JRST AEVAL1
; ROUTINE TO CHANGE LOOK UP PATH FOR BINDINGS
CHENV: PUSHJ P,CHFRM ; CHECK OUT FRAME
MOVE C,(B) ; POINT TO PROCESS
MOVE D,1(B) ; GET TB POINTER FROM FRAME
CAMN SP,SPSAV(D) ; CHANGE?
POPJ P, ; NO, JUST RET
MOVE B,SPSAV(D) ; GET SP OF INTEREST
SWITSP: MOVSI 0,TSKIP ; SET UP SKIP
HRRI 0,1(TP) ; POINT TO UNBIND PATH
MOVE A,PVSTOR+1
ADD A,[BINDID,,BINDID] ; BIND THE BINDING ID
PUSH TP,BNDV
PUSH TP,A
PUSH TP,$TFIX
AOS A,PTIME ; NEW ID
PUSH TP,A
MOVE E,TP ; FOR SPECBIND
PUSH TP,0
PUSH TP,B
PUSH TP,C ; SAVE PROCESS
PUSH TP,D
PUSHJ P,SPECBE ; BIND BINDID
MOVE SP,TP ; GET NEW SP
SUB SP,[3,,3] ; SET UP SP FORK
MOVEM SP,SPSTOR+1
POPJ P,
; HERE TO EVALUATE A FORM (99% OF EVAL'S WORK)
EVFORM: SKIPN C,1(AB) ; EMPTY FORM, RETURN FALSE
JRST EFALSE
GETYP A,(C) ; 1ST ELEMENT OF FORM
CAIE A,TATOM ; ATOM?
JRST EV0 ; NO, EVALUATE IT
MOVE B,1(C) ; GET ATOM
PUSHJ P,IGVAL ; GET ITS GLOBAL VALUE
; SPECIAL HACK TO SPEED UP LVAL AND GVAL CALLS
CAIE B,LVAL
CAIN B,GVAL
JRST ATMVAL ; FAST ATOM VALUE
GETYP 0,A
CAIE 0,TUNBOU ; BOUND?
JRST IAPPLY ; YES APPLY IT
MOVE C,1(AB) ; LOOK FOR LOCAL
MOVE B,1(C)
PUSHJ P,ILVAL
GETYP 0,A
CAIE 0,TUNBOU
JRST IAPPLY ; WIN, GO APPLY IT
PUSH TP,$TATOM
PUSH TP,EQUOTE UNBOUND-VARIABLE
PUSH TP,$TATOM
MOVE C,1(AB) ; FORM BACK
PUSH TP,1(C)
PUSH TP,$TATOM
PUSH TP,IMQUOTE VALUE
MCALL 3,ERROR ; REPORT THE ERROR
JRST IAPPLY
EFALSE: MOVSI A,TFALSE ; SPECIAL FALSE FOR EVAL OF EMPTY FORM
MOVEI B,0
JRST EFINIS
ATMVAL: HRRZ D,(C) ; CDR THE FORM
HRRZ 0,(D) ; AND AGAIN
JUMPN 0,IAPPLY
GETYP 0,(D) ; MAKE SURE APPLYING TO ATOM
CAIE 0,TATOM
JRST IAPPLY
MOVEI E,IGVAL ; ASSUME GLOBAAL
CAIE B,GVAL ; SKIP IF OK
MOVEI E,ILVAL ; ELSE USE LOCAL
PUSH P,B ; SAVE SUBR
MOVE B,(D)+1 ; CLR BUG #1637 (GET THE ATOM FOR THE SUBR)
PUSHJ P,(E) ; AND GET VALUE
CAME A,$TUNBOU
JRST EFINIS ; RETURN FROM EVAL
POP P,B
MOVSI A,TSUBR ; CAUSE REAL SUBR TO GET EROR
JRST IAPPLY
; HERE FOR 1ST ELEMENT NOT A FORM
EV0: PUSHJ P,FASTEV ; EVAL IT
; HERE TO APPLY THINGS IN FORMS
IAPPLY: PUSH TP,(AB) ; SAVE THE FORM
PUSH TP,1(AB)
PUSH TP,A
PUSH TP,B ; SAVE THE APPLIER
PUSH TP,$TFIX ; AND THE ARG GETTER
PUSH TP,[ARGCDR]
PUSHJ P,APLDIS ; GO TO INTERNAL APPLIER
JRST EFINIS ; LEAVE EVAL
; HERE TO EVAL 1ST ELEMENT OF A FORM
FASTEV: MOVE PVP,PVSTOR+1
SKIPE 1STEPR+1(PVP) ; BEING 1 STEPPED?
JRST EV02 ; YES, LET LOSER SEE THIS EVAL
GETYP A,(C) ; GET TYPE
SKIPE D,EVATYP+1 ; USER TABLE?
JRST EV01 ; YES, HACK IT
EV03: CAIG A,NUMPRI ; SKIP IF SELF
SKIPA A,EVTYPE(A) ; GET DISPATCH
MOVEI A,SELF ; USE SLEF
EV04: CAIE A,SELF ; IF EVAL'S TO SELF, JUST USE IT
JRST EV02
MOVSI A,TLIST
MOVE PVP,PVSTOR+1
MOVEM A,CSTO(PVP)
INTGO
SETZM CSTO(PVP)
HLLZ A,(C) ; GET IT
MOVE B,1(C)
JSP E,CHKAB ; CHECK DEFERS
POPJ P, ; AND RETURN
EV01: ADDI D,(A) ; POINT TO SLOT OF USER EVAL TABLE
ADDI D,(A)
SKIPE (D) ; EITHER NOT GIVEN OR SIMPLE
JRST EV02
SKIPN 1(D) ; SKIP IF SIMPLE
JRST EV03 ; NOT GIVEN
MOVE A,1(D)
JRST EV04
EV02: PUSH TP,(C)
HLLZS (TP) ; FIX UP LH
PUSH TP,1(C)
JSP E,CHKARG
MCALL 1,EVAL
POPJ P,
; MAPF/MAPR CALL TO APPLY
IMQUOTE APPLY
MAPPLY: JRST APPLY
; APPLY, FALLS INTO EVAL'S APPLY CODE AT APLDIS
IMFUNCTION APPLY,SUBR
ENTRY
JUMPGE AB,TFA ; MUST BE AT LEAST 1 ARGUMENT
MOVE A,AB
ADD A,[2,,2]
PUSH TP,$TAB
PUSH TP,A
PUSH TP,(AB) ; SAVE FCN
PUSH TP,1(AB)
PUSH TP,$TFIX ; AND ARG GETTER
PUSH TP,[SETZ APLARG]
PUSHJ P,APLDIS
JRST FINIS
; STACKFROM, ALSO FALLS INTO EVAL'S APPLIER AT APLDIS
IMFUNCTION STACKFORM,FSUBR
ENTRY 1
GETYP A,(AB)
CAIE A,TLIST
JRST WTYP1
MOVEI A,3 ; CHECK ALL GOODIES SUPPLIED
HRRZ B,1(AB)
JUMPE B,TFA
HRRZ B,(B) ; CDR IT
SOJG A,.-2
HRRZ C,1(AB) ; GET LIST BACK
PUSHJ P,FASTEV ; DO A FAST EVALUATION
PUSH TP,(AB)
HRRZ C,@1(AB) ; POINT TO ARG GETTING FORMS
PUSH TP,C
PUSH TP,A ; AND FCN
PUSH TP,B
PUSH TP,$TFIX
PUSH TP,[SETZ EVALRG]
PUSHJ P,APLDIS
JRST FINIS
; OFFSETS FOR TEMPORARIES ETC. USED IN APPLYING STUFF
E.FRM==0 ; POINTS TO FORM BEING EVALED (OR ARGS FOR APPLY STACKFORM)
E.FCN==2 ; FUNCTION/SUBR/RSUBR BEING APPLIED
E.ARG==4 ; POINTS TO ARG GETTING ROUTINE (<0 => MUST EVAL ARGS)
E.EXTR==6 ; CONTAINS 1ST ARG IN USER APPLY CASE
E.SEG==10 ; POINTS TO SEGMENT IN FORM BEING HACKED
E.CNT==12 ; COUNTER FOR TUPLES OF ARGS
E.DECL==14 ; POINTS TO DECLARATION LIST IN FUNCTIONS
E.ARGL==16 ; POINTS TO ARG LIST IN FUNCTIONS
E.HEW==20 ; POINTS TO HEWITT ATOM IF IT EXISTS
E.VAL==E.ARGL ; VALUE TYPE FOR RSUBRS
MINTM==E.EXTR+2 ; MIN # OF TEMPS EVER ALLOCATED
E.TSUB==E.CNT+2 ; # OF TEMPS FOR SUBR/NUMBER APPLICATION
XP.TMP==E.HEW-E.EXTR ; # EXTRA TEMPS FOR FUNCTION APPLICATION
R.TMP==4 ; TEMPS AFTER ARGS ARE BOUND
TM.OFF==E.HEW+2-R.TMP ; TEMPS TO FLUSH AFTER BIND OF ARGS
RE.FCN==0 ; AFTER BINDING CONTAINS FCN BODY
RE.ARG==2 ; ARG LIST AFTER BINDING
; GENERAL THING APPLYER
APLDIS: PUSH TP,[0] ; SLOT USED FOR USER APPLYERS
PUSH TP,[0]
APLDIX: GETYP A,E.FCN(TB) ; GET TYPE
APLDI: SKIPE D,APLTYP+1 ; USER TABLE EXISTS?
JRST APLDI1 ; YES, USE IT
APLDI2: CAILE A,NUMPRI ; SKIP IF NOT PRIM
JRST NAPT
HRRO A,APTYPE(A)
JRST (A)
APLDI1: ADDI D,(A) ; POINT TO SLOT
ADDI D,(A)
SKIPE (D) ; SKIP IF NOT GIVEN OR STANDARD
JRST APLDI3
APLDI4: SKIPE D,1(D) ; GET DISP
JRST (D)
JRST APLDI2 ; USE SYSTEM DISPATCH
APLDI3: SKIPE E.EXTR+1(TB) ; SKIP IF HAVEN'T BEEN HERE BEFORE
JRST APLDI4
MOVE A,(D) ; GET ITS HANDLER
EXCH A,E.FCN(TB) ; AND USE AS FCN
MOVEM A,E.EXTR(TB) ; SAVE
MOVE A,1(D)
EXCH A,E.FCN+1(TB)
MOVEM A,E.EXTR+1(TB) ; STASH OLD FCN AS EXTRG
GETYP A,(D) ; GET TYPE
JRST APLDI
; APPLY DISPATCH TABLE
DISTBL APTYPE,<SETZ NAPTL>,[[TSUBR,APSUBR],[TFSUBR,APFSUB],[TRSUBR,APRSUB],[TFIX,APNUM]
[TEXPR,APEXPR],[TFUNAR,APFUNARG],[TENTER,APENTR],[TMACRO,APMACR],[TOFFS,APNUM]]
; SUBR TO SAY IF TYPE IS APPLICABLE
MFUNCTION APPLIC,SUBR,[APPLICABLE?]
ENTRY 1
GETYP A,(AB)
PUSHJ P,APLQ
JRST IFALSE
JRST TRUTH
; HERE TO DETERMINE IF A TYPE IS APPLICABLE
APLQ: PUSH P,B
SKIPN B,APLTYP+1
JRST USEPUR ; USE PURE TABLE
ADDI B,(A)
ADDI B,(A) ; POINT TO SLOT
SKIPG 1(B) ; SKIP IF WINNER
SKIPE (B) ; SKIP IF POTENIAL LOSER
JRST CPPJ1B ; WIN
SKIPE 1(B) ; SKIP IF MUST USE PURE TABBLE
JRST CPOPJB
USEPUR: CAILE A,NUMPRI ; SKIP IF NOT PRIM
JRST CPOPJB
SKIPL APTYPE(A) ; SKIP IF APLLICABLE
CPPJ1B: AOS -1(P)
CPOPJB: POP P,B
POPJ P,
; FSUBR APPLYER
APFSUBR:
SKIPN E.EXTR(TB) ; IF EXTRA ARG
SKIPGE E.ARG+1(TB) ; OR APPLY/STACKFORM, LOSE
JRST BADFSB
MOVE A,E.FCN+1(TB) ; GET FCN
HRRZ C,@E.FRM+1(TB) ; GET ARG LIST
SUB TP,[MINTM,,MINTM] ; FLUSH UNWANTED TEMPS
PUSH TP,$TLIST
PUSH TP,C ; ARG TO STACK
.MCALL 1,(A) ; AND CALL
POPJ P, ; AND LEAVE
; SUBR APPLYER
APSUBR:
PUSHJ P,PSH4ZR ; SET UP ZEROED SLOTS
SKIPG E.ARG+1(TB)
AOS E.CNT(TB) ; INDICATES IF MUST EVAL ARGS
MOVSI A,400000 ; MAKE SURE OF GOOD INDIRECT
IORM A,E.ARG+1(TB)
SKIPN A,E.EXTR(TB) ; FUNNY ARGS
JRST APSUB1 ; NO, GO
MOVE B,E.EXTR+1(TB) ; YES , GET VAL
JRST APSUB2 ; AND FALL IN
APSUB1: PUSHJ P,@E.ARG+1(TB) ; EAT AN ARG
JRST APSUBD ; DONE
APSUB2: PUSH TP,A
PUSH TP,B
AOS E.CNT+1(TB) ; COUNT IT
JRST APSUB1
APSUBD: MOVE A,E.CNT+1(TB) ; FINISHED, GET COUNT
MOVE B,E.FCN+1(TB) ; AND SUBR
GETYP 0,E.FCN(TB)
CAIN 0,TENTER
JRST APENDN
PUSHJ P,BLTDN ; FLUSH CRUFT
.ACALL A,(B)
POPJ P,
BLTDN: MOVEI C,(TB) ; POINT TO DEST
HRLI C,E.TSUB(C) ; AND SOURCE
BLT C,-E.TSUB(TP) ;BL..............T
SUB TP,[E.TSUB,,E.TSUB]
POPJ P,
APENDN: PUSHJ P,BLTDN
APNDN1: .ECALL A,(B)
POPJ P,
; FLAGS FOR RSUBR HACKER
F.STR==1
F.OPT==2
F.QUO==4
F.NFST==10
; APPLY OBJECTS OF TYPE RSUBR
APENTR:
APRSUBR:
MOVE C,E.FCN+1(TB) ; GET THE RSUBR
CAML C,[-5,,] ; IS IT LONG ENOUGH FOR DECLS
JRST APSUBR ; NO TREAT AS A SUBR
GETYP 0,4(C) ; GET TYPE OF 3D ELEMENT
CAIE 0,TDECL ; DECLARATION?
JRST APSUBR ; NO, TREAT AS SUBR
PUSHJ P,PSH4ZR ; ALLOCATE SOME EXTRA ROOM
PUSH TP,$TDECL ; PUSH UP THE DECLS
PUSH TP,5(C)
PUSH TP,$TLOSE ; SAVE ROOM FOR VAL DECL
PUSH TP,[0]
SKIPG E.ARG+1(TB)
AOS E.CNT(TB) ; INDICATES IF MUST EVAL ARGS
MOVSI A,400000 ; MAKE SURE OF GOOD INDIRECT
IORM A,E.ARG+1(TB)
SKIPN E.EXTR(TB) ; "EXTRA" ARG?
JRST APRSU1 ; NO,
MOVE 0,[SETZ EXTRGT] ; CHANGE THE ACCESS FCN
EXCH 0,E.ARG+1(TB)
HRRM 0,E.ARG(TB) ; REMEMBER IT
APRSU1: MOVEI 0,0 ; INIT FLAG REGISTER
PUSH P,0 ; SAVE
APRSU2: HRRZ A,E.DECL+1(TB) ; GET DECL LIST
JUMPE A,APRSU3 ; DONE!
HRRZ B,(A) ; CDR IT
MOVEM B,E.DECL+1(TB)
PUSHJ P,NXTDCL ; IS NEXT THING A STRING?
JRST APRSU4 ; NO, BETTER BE A TYPE
CAMN B,[ASCII /VALUE/]
JRST RSBVAL ; SAVE VAL DECL
TRON 0,F.NFST ; IF NOT FIRST, LOSE
CAME B,[ASCII /CALL/] ; CALL DECL
JRST APRSU7
SKIPE E.CNT(TB) ; LEGAL?
JRST MPD
MOVE C,E.FRM(TB)
MOVE D,E.FRM+1(TB) ; GET FORM
JRST APRS10 ; HACK IT
APRSU5: TROE 0,F.STR ; STRING STRING?
JRST MPD ; LOSER
CAMN B,[<ASCII /OPT/>]
JRST .+3
CAME B,[<ASCII /OPTIO/>+1] ; OPTIONA?
JRST APRSU8
TROE 0,F.OPT ; CHECK AND SET
JRST MPD ; OPTINAL OPTIONAL LOSES
JRST APRSU2 ; TO MAIN LOOP
APRSU7: CAME B,[ASCII /QUOTE/]
JRST APRSU5
TRO 0,F.STR
TROE 0,F.QUO ; TURN ON AND CHECK QUOTE
JRST MPD ; QUOTE QUOTE LOSES
JRST APRSU2 ; GO TO END OF LOOP
APRSU8: CAME B,[ASCII /ARGS/]
JRST APRSU9
SKIPE E.CNT(TB) ; SKIP IF LEGAL
JRST MPD
HRRZ D,@E.FRM+1(TB) ; GET ARG LIST
MOVSI C,TLIST
APRS10: HRRZ A,(A) ; GET THE DECL
MOVEM A,E.DECL+1(TB) ; CLOBBER
HRRZ B,(A) ; CHECK FOR TOO MUCH
JUMPN B,MPD
MOVE B,1(A) ; GET DECL
HLLZ A,(A) ; GOT THE DECL
MOVEM 0,(P) ; SAVE FLAGS
JSP E,CHKAB ; CHECK DEFER
PUSH TP,C
PUSH TP,D ; SAVE
PUSHJ P,TMATCH
JRST WTYP
AOS E.CNT+1(TB) ; COUNT ARG
JRST APRDON ; GO CALL RSUBR
RSBVAL: HRRZ A,E.DECL+1(TB) ; GET DECL
JUMPE A,MPD
HRRZ B,(A) ; POINT TO DECL
MOVEM B,E.DECL+1(TB) ; SAVE NEW DECL POINTER
PUSHJ P,NXTDCL
JRST .+2
JRST MPD
MOVEM A,E.VAL+1(TB) ; SAVE VAL DECL
MOVSI A,TDCLI
MOVEM A,E.VAL(TB) ; SET ITS TYPE
JRST APRSU2
APRSU9: CAME B,[ASCII /TUPLE/]
JRST MPD
MOVEM 0,(P) ; SAVE FLAGS
HRRZ A,(A) ; CDR DECLS
MOVEM A,E.DECL+1(TB)
HRRZ B,(A)
JUMPN B,MPD ; LOSER
PUSH P,[0] ; COUNT ELEMENTS IN TUPLE
APRTUP: PUSHJ P,@E.ARG+1(TB) ; GOBBLE ARGS
JRST APRTPD ; DONE
PUSH TP,A
PUSH TP,B
AOS (P) ; COUNT IT
JRST APRTUP ; AND GO
APRTPD: POP P,C ; GET COUNT
ADDM C,E.CNT+1(TB) ; UPDATE MAIN COUNT
ASH C,1 ; # OF WORDS
HRLI C,TINFO ; BUILD FENCE POST
PUSH TP,C
PUSHJ P,TBTOTP ; GEN REL OFFSET TO TOP
PUSH TP,D
HRROI D,-1(TP) ; POINT TO TOP
SUBI D,(C) ; TO BASE
TLC D,-1(C)
MOVSI C,TARGS ; BUILD TYPE WORD
HLR C,OTBSAV(TB)
MOVE A,E.DECL+1(TB)
MOVE B,1(A)
HLLZ A,(A) ; TYPE/VAL
JSP E,CHKAB ; CHECK
PUSHJ P,TMATCH ; GOTO TYPE CHECKER
JRST WTYP
SUB TP,[2,,2] ; REMOVE FENCE POST
APRDON: SUB P,[1,,1] ; FLUSH CRUFT
MOVE A,E.CNT+1(TB) ; GET # OF ARGS
MOVE B,E.FCN+1(TB)
GETYP 0,E.FCN(TB) ; COULD BE ENTRY
MOVEI C,(TB) ; PREPARE TO BLT DOWN
HRLI C,E.TSUB+2(C)
BLT C,-E.TSUB+2(TP)
SUB TP,[E.TSUB+2,,E.TSUB+2]
CAIE 0,TRSUBR
JRST APNDNX
.ACALL A,(B) ; CALL THE RSUBR
JRST PFINIS
APNDNX: .ECALL A,(B)
JRST PFINIS
APRSU4: MOVEM 0,(P) ; SAVE FLAGS
MOVE B,1(A) ; GET DECL
HLLZ A,(A)
JSP E,CHKAB
MOVE 0,(P) ; RESTORE FLAGS
PUSH TP,A
PUSH TP,B ; AND SAVE
SKIPE E.CNT(TB) ; ALREADY EVAL'D
JRST APREV0
TRZN 0,F.QUO
JRST APREVA ; MUST EVAL ARG
MOVEM 0,(P)
HRRZ C,@E.FRM+1(TB) ; GET ARG?
TRNE 0,F.OPT ; OPTIONAL
JUMPE C,APRDN
JUMPE C,TFA ; NO, TOO FEW ARGS
MOVEM C,E.FRM+1(TB)
HLLZ A,(C) ; GET ARG
MOVE B,1(C)
JSP E,CHKAB ; CHECK THEM
APRTYC: MOVE C,A ; SET UP FOR TMATCH
MOVE D,B
EXCH B,(TP)
EXCH A,-1(TP) ; SAVE STUFF
APRS11: PUSHJ P,TMATCH ; CHECK TYPE
JRST WTYP
MOVE 0,(P) ; RESTORE FLAGS
TRZ 0,F.STR
AOS E.CNT+1(TB)
JRST APRSU2 ; AND GO ON
APREV0: TRNE 0,F.QUO ; ATTEMPT TO QUOTE ALREADY EVAL'D ARG ?
JRST MPD ; YES, LOSE
APREVA: PUSHJ P,@E.ARG+1(TB) ; EVAL ONE
TDZA C,C ; C=0 ==> NONE LEFT
MOVEI C,1
MOVE 0,(P) ; FLAGS
JUMPN C,APRTYC ; GO CHECK TYPE
APRDN: SUB TP,[2,,2] ; FLUSH DECL
TRNE 0,F.OPT ; OPTIONAL?
JRST APRDON ; ALL DONE
JRST TFA
APRSU3: TRNE 0,F.STR ; END IN STRING?
JRST MPD
PUSHJ P,@E.ARG+1(TB) ; SEE IF ANYMORE ARGS
JRST APRDON
JRST TMA
; STANDARD ARGUMENT GETTERS USED IN APPLYING THINGS
ARGCDR: HRRZ C,@E.FRM+1(TB) ; POINT TO ARGLIST (NOTE: POINTS 1 BEFORE WHERE ARG IS)
JUMPE C,CPOPJ ; LEAVE IF DONE
MOVEM C,E.FRM+1(TB)
GETYP 0,(C) ; GET TYPE OF ARG
CAIN 0,TSEG
JRST ARGCD1 ; SEG MENT HACK
PUSHJ P,FASTEV
JRST CPOPJ1
ARGCD1: PUSH TP,$TFORM ; PRETEND WE ARE A FORM
PUSH TP,1(C)
MCALL 1,EVAL
MOVEM A,E.SEG(TB)
MOVEM B,E.SEG+1(TB)
PUSHJ P,TYPSEG ; GET SEG TYPE CODE
HRRM C,E.ARG(TB) ; SAVE IT IN OBSCCURE PLACE
MOVE C,DSTORE ; FIX FOR TEMPLATE
MOVEM C,E.SEG(TB)
MOVE C,[SETZ SGARG]
MOVEM C,E.ARG+1(TB) ; SET NEW ARG GETTER
; FALL INTO SEGARG
SGARG: INTGO
HRRZ C,E.ARG(TB) ; SEG CODE TO C
MOVE D,E.SEG+1(TB)
MOVE A,E.SEG(TB)
MOVEM A,DSTORE
PUSHJ P,NXTLM ; GET NEXT ELEMENT
JRST SEGRG1 ; DONE
MOVEM D,E.SEG+1(TB)
MOVE D,DSTORE ; KEEP TYPE WINNING
MOVEM D,E.SEG(TB)
SETZM DSTORE
JRST CPOPJ1 ; RETURN
SEGRG1: SETZM DSTORE
MOVEI C,ARGCDR
HRRM C,E.ARG+1(TB) ; RESET ARG GETTER
JRST ARGCDR
; ARGUMENT GETTER FOR APPLY
APLARG: INTGO
SKIPL A,E.FRM+1(TB) ; ANY ARGS LEFT
POPJ P, ; NO, EXIT IMMEDIATELY
ADD A,[2,,2]
MOVEM A,E.FRM+1(TB)
MOVE B,-1(A) ; RET NEXT ARG
MOVE A,-2(A)
JRST CPOPJ1
; STACKFORM ARG GETTER
EVALRG: SKIPN C,@E.FRM+1(TB) ; ANY FORM?
POPJ P,
PUSHJ P,FASTEV
GETYP A,A ; CHECK FOR FALSE
CAIN A,TFALSE
POPJ P,
MOVE C,E.FRM+1(TB) ; GET OTHER FORM
PUSHJ P,FASTEV
JRST CPOPJ1
; HERE TO APPLY NUMBERS
APNUM: PUSHJ P,PSH4ZR ; TP SLOTS
SKIPN A,E.EXTR(TB) ; FUNNY ARG?
JRST APNUM1 ; NOPE
MOVE B,E.EXTR+1(TB) ; GET ARG
JRST APNUM2
APNUM1: PUSHJ P,@E.ARG+1(TB) ; GET ARG
JRST TFA
APNUM2: PUSH TP,A
PUSH TP,B
PUSH TP,E.FCN(TB)
PUSH TP,E.FCN+1(TB)
PUSHJ P,@E.ARG+1(TB)
JRST .+2
JRST APNUM3
PUSHJ P,BLTDN ; FLUSH JUNK
MCALL 2,NTH
POPJ P,
; HACK FOR TURNING <3 .FOO .BAR> INTO <PUT .FOO 3 .BAR>
APNUM3: PUSH TP,A
PUSH TP,B
PUSHJ P,@E.ARG+1(TB)
JRST .+2
JRST TMA
PUSHJ P,BLTDN
GETYP A,-5(TP)
PUSHJ P,ISTRUC ; STRUCTURED FIRST ARG?
JRST WTYP1
MCALL 3,PUT
POPJ P,
; HERE TO APPLY SUSSMAN FUNARGS
APFUNARG:
SKIPN C,E.FCN+1(TB)
JRST FUNERR
HRRZ D,(C) ; MUST BE AT LEAST 2 LONG
JUMPE D,FUNERR
GETYP 0,(D) ; CHECK FOR LIST
CAIE 0,TLIST
JRST FUNERR
HRRZ 0,(D) ; SHOULD BE END
JUMPN 0,FUNERR
GETYP 0,(C) ; 1ST MUST BE FCN
CAIE 0,TEXPR
JRST FUNERR
SKIPN C,1(C)
JRST NOBODY
PUSHJ P,APEXPF ; BIND THE ARGS AND AUX'S
HRRZ C,RE.FCN+1(TB) ; GET BODY OF FUNARG
MOVE B,1(C) ; GET FCN
MOVEM B,RE.FCN+1(TB) ; AND SAVE
HRRZ C,(C) ; CDR FUNARG BODY
MOVE C,1(C)
MOVSI 0,TLIST ; SET UP TYPE
MOVE PVP,PVSTOR+1
MOVEM 0,CSTO(PVP) ; FOR INTS TO WIN
FUNLP: INTGO
JUMPE C,DOF ; RUN IT
GETYP 0,(C)
CAIE 0,TLIST ; BETTER BE LIST
JRST FUNERR
PUSH TP,$TLIST
PUSH TP,C
PUSHJ P,NEXTDC ; GET POSSIBILITY
JRST FUNERR ; LOSER
CAIE A,2
JRST FUNERR
HRRZ B,(B) ; GET TO VALUE
MOVE C,(TP)
SUB TP,[2,,2]
PUSH TP,BNDA
PUSH TP,E
HLLZ A,(B) ; GET VAL
MOVE B,1(B)
JSP E,CHKAB ; HACK DEFER
PUSHJ P,PSHAB4 ; PUT VAL IN
HRRZ C,(C) ; CDR
JUMPN C,FUNLP
; HERE TO RUN FUNARG
DOF: MOVE PVP,PVSTOR+1
SETZM CSTO(PVP) ; DONT CONFUSE GC
PUSHJ P,SPECBIND ; BIND 'EM UP
JRST RUNFUN
; HERE TO DO MACROS
APMACR: HRRZ E,OTBSAV(TB)
HRRZ D,PCSAV(E) ; SEE WHERE FROM
CAIE D,EFCALL+1 ; 1STEP
JRST .+3
HRRZ E,OTBSAV(E)
HRRZ D,PCSAV(E)
CAIN D,AEVAL3 ; SKIP IF NOT RIGHT
JRST APMAC1
SKIPG E.ARG+1(TB) ; SKIP IF REAL FORM EXISTS
JRST BADMAC
MOVE A,E.FRM(TB)
MOVE B,E.FRM+1(TB)
SUB TP,[E.EXTR+2,,E.EXTR+2] ; FLUSH JUNK
PUSH TP,A
PUSH TP,B
MCALL 1,EXPAND ; EXPAND THE MACRO
PUSH TP,A
PUSH TP,B
MCALL 1,EVAL ; EVAL THE RESULT
POPJ P,
APMAC1: MOVE C,E.FCN+1(TB) ; GET MACRO BODY
GETYP A,(C)
MOVE B,1(C)
MOVSI A,(A)
JSP E,CHKAB ; FIX DEFERS
MOVEM A,E.FCN(TB)
MOVEM B,E.FCN+1(TB)
JRST APLDIX
; HERE TO APPLY EXPRS (FUNCTIONS)
APEXPR: PUSHJ P,APEXP ; BIND ARGS AND AUX'S
RUNFUN: HRRZ A,RE.FCN(TB) ; AMOUNT OF FCN TO SKIP
MOVEI C,RE.FCN+1(TB) ; POINT TO FCN
HRRZ C,(C) ; SKIP SOMETHING
SOJGE A,.-1 ; UNTIL 1ST FORM
MOVEM C,RE.FCN+1(TB) ; AND STORE
JRST DOPROG ; GO RUN PROGRAM
APEXP: SKIPN C,E.FCN+1(TB) ; CHECK FRO BODY
JRST NOBODY
APEXPF: PUSH P,[0] ; COUNT INIT CRAP
ADD TP,[XP.TMP,,XP.TMP] ; SLOTS FOR HACKING
SKIPL TP
PUSHJ P,TPOVFL
SETZM 1-XP.TMP(TP) ; ZERO OUT
MOVEI A,-XP.TMP+2(TP)
HRLI A,-1(A)
BLT A,(TP) ; ZERO SLOTS
SKIPG E.ARG+1(TB)
AOS E.CNT(TB) ; INDICATES IF MUST EVAL ARGS
MOVSI A,400000 ; MAKE E.ARG BE NEG FOR SAFE @ING
IORM A,E.ARG+1(TB)
PUSHJ P,CARATC ; SEE IF HEWITT ATOM EXISTS
JRST APEXP1 ; NO, GO LOOK FOR ARGLIST
MOVEM E,E.HEW+1(TB) ; SAVE ATOM
MOVSM 0,E.HEW(TB) ; AND TYPE
AOS (P) ; COUNT HEWITT ATOM
APEXP1: GETYP 0,(C) ; LOOK AT NEXT THING
CAIE 0,TLIST ; BETTER BE LIST!!!
JRST MPD.0 ; LOSE
MOVE B,1(C) ; GET LIST
MOVEM B,E.ARGL+1(TB) ; SAVE
MOVSM 0,E.ARGL(TB) ; WITH TYPE
HRRZ C,(C) ; CDR THE FCN
JUMPE C,NOBODY ; BODYLESS FCN
GETYP 0,(C) ; SEE IF DCL LIST SUPPLIED
CAIE 0,TDECL
JRST APEXP2 ; NO, START PROCESSING ARGS
AOS (P) ; COUNT DCL
MOVE B,1(C)
MOVEM B,E.DECL+1(TB)
MOVSM 0,E.DECL(TB)
HRRZ C,(C) ; CDR ON
JUMPE C,NOBODY
; CHECK FOR EXISTANCE OF EXTRA ARG
APEXP2: POP P,A ; GET COUNT
HRRM A,E.FCN(TB) ; AND SAVE
SKIPN E.EXTR(TB) ; SKIP IF FUNNY EXTRA ARG EXISTS
JRST APEXP3
MOVE 0,[SETZ EXTRGT]
EXCH 0,E.ARG+1(TB)
HRRM 0,E.ARG(TB) ; SAVE OLD GETTER AROUND
AOS E.CNT(TB)
; FALL THROUGH
; LOOK FOR "BIND" DECLARATION
APEXP3: PUSHJ P,UNPROG ; UNASSIGN LPROG IF NEC
APXP3A: SKIPN A,E.ARGL+1(TB) ; GET ARGLIST
JRST APEXP4 ; NONE, VERIFY NONE WERE GIVEN
PUSHJ P,NXTDCL ; SEE IF A DECL IS THERE
JRST BNDRG ; NO, GO BIND NORMAL ARGS
HRRZ C,(A) ; CDR THE DCLS
CAME B,[ASCII /BIND/]
JRST CH.CAL ; GO LOOK FOR "CALL"
PUSHJ P,CARTMC ; MUST BE AN ATOM
MOVEM C,E.ARGL+1(TB) ; AND SAVE CDR'D ARGS
PUSHJ P,MAKENV ; GENERATE AN ENVIRONMENT
PUSHJ P,PSBND1 ; PUSH THE BINDING AND CHECK THE DCL
JRST APXP3A ; IN CASE <"BIND" B "BIND" C......
; LOOK FOR "CALL" DCL
CH.CAL: CAME B,[ASCII /CALL/]
JRST CHOPT ; TRY SOMETHING ELSE
; SKIPG E.ARG+1(TB) ; DONT SKIP IF CANT WIN
SKIPE E.CNT(TB)
JRST MPD.2
PUSHJ P,CARTMC ; BETTER BE AN ATOM
MOVEM C,E.ARGL+1(TB)
MOVE A,E.FRM(TB) ; RETURN FORM
MOVE B,E.FRM+1(TB)
PUSHJ P,PSBND1 ; BIND AND CHECK
JRST APEXP5
; BIND NORMAL ARGS BY CALLING BNDEM1, RETURNS WHEN ALL DONE
BNDRG: PUSHJ P,BNDEM1 ; GO BIND THEM UP
TRNN A,4 ; SKIP IF HIT A DCL
JRST APEXP4 ; NOT A DCL, MUST BE DONE
; LOOK FOR "OPTIONAL" DECLARATION
CHOPT: CAMN B,[<ASCII /OPT/>]
JRST .+3
CAME B,[<ASCII /OPTIO/>+1]
JRST CHREST ; TRY TUPLE/ARGS
MOVEM C,E.ARGL+1(TB) ; SAVE RESTED ARGLIST
PUSHJ P,BNDEM2 ; DO ALL SUPPLIED OPTIONALS
TRNN A,4 ; SKIP IF NEW DCL READ
JRST APEXP4
; CHECK FOR "ARGS" DCL
CHREST: CAME B,[ASCII /ARGS/]
JRST CHRST1 ; GO LOOK FOR "TUPLE"
; SKIPGE E.ARG+1(TB) ; SKIP IF LEGAL
SKIPE E.CNT(TB)
JRST MPD.3
PUSHJ P,CARTMC ; GOBBLE ATOM
MOVEM C,E.ARGL+1(TB) ; SAVE CDR'D ARG
HRRZ B,@E.FRM+1(TB) ; GET ARG LIST
MOVSI A,TLIST ; GET TYPE
PUSHJ P,PSBND1
JRST APEXP5
; HERE TO CHECK FOR "TUPLE"
CHRST1: CAME B,[ASCII /TUPLE/]
JRST APXP10
PUSHJ P,CARTMC ; GOBBLE ATOM
MOVEM C,E.ARGL+1(TB)
SETZB A,B
PUSHJ P,PSHBND ; SET UP BINDING
SETZM E.CNT+1(TB) ; ZERO ARG COUNTER
TUPLP: PUSHJ P,@E.ARG+1(TB) ; GET AN ARG
JRST TUPDON ; FINIS
AOS E.CNT+1(TB)
PUSH TP,A
PUSH TP,B
JRST TUPLP
TUPDON: PUSHJ P,MAKINF ; MAKE INFO CELL
PUSH TP,$TINFO ; FENCE POST TUPLE
PUSHJ P,TBTOTP
ADDI D,TM.OFF ; COMPENSATE FOR MOVEMENT
PUSH TP,D
MOVE C,E.CNT+1(TB) ; GET COUNT
ASH C,1 ; TO WORDS
HRRM C,-1(TP) ; INTO FENCE POST
MOVEI B,-TM.OFF-1(TP) ; SETUP ARG POINTER
SUBI B,(C) ; POINT TO BASE OF TUPLE
MOVNS C ; FOR AOBJN POINTER
HRLI B,(C) ; GOOD ARGS POINTER
MOVEM A,TM.OFF-4(B) ; STORE
MOVEM B,TM.OFF-3(B)
; CHECK FOR VALID ENDING TO ARGS
APEXP5: PUSHJ P,NEXTD ; READ NEXT THING IN ARGLIST
JRST APEXP8 ; DONE
TRNN A,4 ; SKIP IF DCL
JRST MPD.4 ; LOSER
APEXP7: MOVSI A,-NWINS ; CHECK FOR A WINNER
CAME B,WINRS(A)
AOBJN A,.-1
JUMPGE A,MPD.6 ; NOT A WINNER
; HERE TO BLT THE WORLD DOWN ON TOP OF ALL THE USELESS TEMPS
APEXP8: MOVE 0,E.HEW+1(TB) ; GET HEWITT ATOM
MOVE E,E.FCN(TB) ; SAVE COUNTER
MOVE C,E.FCN+1(TB) ; FCN
MOVE B,E.ARGL+1(TB) ; ARG LIST
MOVE D,E.DECL+1(TB) ; AND DCLS
MOVEI A,R.TMP(TB) ; SET UP BLT
HRLI A,TM.OFF(A)
BLT A,-TM.OFF(TP) ; BLLLLLLLLLLLLLT
SUB TP,[TM.OFF,,TM.OFF] ; FLUSH CRUFT
MOVEM E,RE.FCN(TB)
MOVEM C,RE.FCN+1(TB)
MOVEM B,RE.ARGL+1(TB)
MOVE E,TP
PUSH TP,$TATOM
PUSH TP,0
PUSH TP,$TDECL
PUSH TP,D
GETYP A,-5(TP) ; TUPLE ON TOP?
CAIE A,TINFO ; SKIP IF YES
JRST APEXP9
HRRZ A,-5(TP) ; GET SIZE
ADDI A,2
HRLI A,(A)
SUB E,A ; POINT TO BINDINGS
SKIPE C,(TP) ; IF DCL
PUSHJ P,CHKDCL ; CHECK TYPE SPEC ON TUPLE
APEXP9: PUSHJ P,USPCBE ; DO ACTUAL BINDING
MOVE E,-2(TP) ; RESTORE HEWITT ATOM
MOVE D,(TP) ; AND DCLS
SUB TP,[4,,4]
JRST AUXBND ; GO BIND AUX'S
; HERE TO VERIFY CHECK IF ANY ARGS LEFT
APEXP4: PUSHJ P,@E.ARG+1(TB)
JRST APEXP8 ; WIN
JRST TMA ; TOO MANY ARGS
APXP10: PUSH P,B
PUSHJ P,@E.ARG+1(TB)
JRST .+2
JRST TMA
POP P,B
JRST APEXP7
; LIST OF POSSIBLE TERMINATING NAMES
WINRS:
AS.ACT: ASCII /ACT/
AS.NAM: ASCII /NAME/
AS.AUX: ASCII /AUX/
AS.EXT: ASCII /EXTRA/
NWINS==.-WINRS
; HERE TO BIND AUX VARIABLES FOR PROGS AND FCNS
AUXBND: PUSH P,E ; SAVE HEWITT ATOM ( WILL PUT ON MARKED STACK
; WHEN NECESSARY)
PUSH P,D ; SAME WITH DCL LIST
PUSH P,[-1] ; FLAG SAYING WE ARE FCN
SKIPN C,RE.ARG+1(TB) ; GET ARG LIST
JRST AUXDON
GETYP 0,(C) ; GET TYPE
CAIE 0,TDEFER ; SKIP IF CHSTR
MOVMS (P) ; SAY WE ARE IN OPTIONALS
JRST AUXB1
PRGBND: PUSH P,E
PUSH P,D
PUSH P,[0] ; WE ARE IN AUXS
AUXB1: HRRZ C,RE.ARG+1(TB) ; POINT TO ARGLIST
PUSHJ P,NEXTDC ; GET NEXT THING OFF OF ARG LIST
JRST AUXDON
TRNE A,4 ; SKIP IF SOME KIND OF ATOM
JRST TRYDCL ; COUDL BE DCL
TRNN A,1 ; SKIP IF QUOTED
JRST AUXB2
SKIPN (P) ; SKIP IF QUOTED OK
JRST MPD.11
AUXB2: PUSHJ P,PSHBND ; SET UP BINDING
PUSH TP,$TDECL ; SAVE HEWITT ATOM
PUSH TP,-1(P)
PUSH TP,$TATOM ; AND DECLS
PUSH TP,-2(P)
TRNN A,2 ; SKIP IF INIT VAL EXISTS
JRST AUXB3 ; NO, USE UNBOUND
; EVALUATE EXPRESSION
HRRZ C,(B) ; CDR ATOM OFF
; CHECK FOR SPECIAL FORMS <TUPLE ...> <ITUPLE ...>
GETYP 0,(C) ; GET TYPE OF GOODIE
CAIE 0,TFORM ; SMELLS LIKE A FORM
JRST AUXB13
HRRZ D,1(C) ; GET 1ST ELEMENT
GETYP 0,(D) ; AND ITS VAL
CAIE 0,TATOM ; FEELS LIKE THE RIGHT FORM
JRST AUXB13
MOVE 0,1(D) ; GET THE ATOM
CAME 0,IMQUOTE TUPLE
CAMN 0,MQUOTE ITUPLE
JRST DOTUPL ; SURE GLAD I DIDN'T STEP IN THAT FORM
AUXB13: PUSHJ P,FASTEV
AUXB14: MOVE E,TP
AUXB4: MOVEM A,-7(E) ; STORE VAL IN BINDING
MOVEM B,-6(E)
; HERE TO CHECK AGAINST DECLARATIONS AND COMPLETE THE BINDING
AUXB5: SUB E,[4,,4] ; POINT TO BINDING TOP
SKIPE C,-2(TP) ; POINT TO DECLARATINS
PUSHJ P,CHKDCL ; CHECK IT
PUSHJ P,USPCBE ; AND BIND UP
SKIPE C,RE.ARG+1(TB) ; CDR DCLS
HRRZ C,(C) ; IF ANY TO CDR
MOVEM C,RE.ARG+1(TB)
MOVE A,(TP) ; NOW PUT HEWITT ATOM AND DCL AWAY
MOVEM A,-2(P)
MOVE A,-2(TP)
MOVEM A,-1(P)
SUB TP,[4,,4] ; FLUSH SLOTS
JRST AUXB1
AUXB3: MOVNI B,1
MOVSI A,TUNBOU
JRST AUXB14
; HERE TO HANDLE "CALLS" TO TUPLE AND ITUPLE
DOTUPL: SKIPE E,(P) ; SKIP IF IN AUX LIST
JRST TUPLE
PUSH TP,$TLIST ; SAVE THE MAGIC FORM
PUSH TP,D
CAME 0,IMQUOTE TUPLE
JRST DOITUP ; DO AN ITUPLE
; FALL INTO A TUPLE PUSHING LOOP
DOTUP1: HRRZ C,@(TP) ; CDR THE FORM
JUMPE C,ATUPDN ; FINISHED
MOVEM C,(TP) ; SAVE CDR'D RESULT
GETYP 0,(C) ; CHECK FOR SEGMENT
CAIN 0,TSEG
JRST DTPSEG ; GO PULL IT APART
PUSHJ P,FASTEV ; EVAL IT
PUSHJ P,CNTARG ; PUSH IT UP AND COUNT THEM
JRST DOTUP1
; HERE WHEN WE FINISH
ATUPDN: SUB TP,[2,,2] ; FLUSH THE LIST
ASH E,1 ; E HAS # OF ARGS DOUBLE IT
MOVEI D,(TP) ; FIND BASE OF STACK AREA
SUBI D,(E)
MOVSI C,-3(D) ; PREPARE BLT POINTER
BLT C,C ; HEWITT ATOM AND DECL TO 0,A,B,C
; NOW PREPEARE TO BLT TUPLE DOWN
MOVEI D,-3(D) ; NEW DEST
HRLI D,4(D) ; SOURCE
BLT D,-4(TP) ; SLURP THEM DOWN
HRLI E,TINFO ; SET UP FENCE POST
MOVEM E,-3(TP) ; AND STORE
PUSHJ P,TBTOTP ; GET OFFSET
ADDI D,3 ; FUDGE FOR NOT AT TOP OF STACK
MOVEM D,-2(TP)
MOVEM 0,-1(TP) ; RESTORE HEW ATOM AND DECLS
MOVEM A,(TP)
PUSH TP,B
PUSH TP,C
PUSHJ P,MAKINF ; MAKE 1ST WORD OF FUNNYS
HRRZ E,-5(TP) ; RESTORE WORDS OF TUPLE
HRROI B,-5(TP) ; POINT TO TOP OF TUPLE
SUBI B,(E) ; NOW BASE
TLC B,-1(E) ; FIX UP AOBJN PNTR
ADDI E,2 ; COPNESATE FOR FENCE PST
HRLI E,(E)
SUBM TP,E ; E POINT TO BINDING
JRST AUXB4 ; GO CLOBBER IT IN
; HERE TO HANDLE SEGMENTS IN THESE FUNNY FORMS
DTPSEG: PUSH TP,$TFORM ; SAVE THE HACKER
PUSH TP,1(C)
MCALL 1,EVAL ; AND EVALUATE IT
MOVE D,B ; GET READY FOR A SEG LOOP
MOVEM A,DSTORE
PUSHJ P,TYPSEG ; TYPE AND CHECK IT
DTPSG1: INTGO ; DONT BLOW YOUR STACK
PUSHJ P,NXTLM ; ELEMENT TO A AND B
JRST DTPSG2 ; DONE
PUSHJ P,CNTARG ; PUSH AND COUNT
JRST DTPSG1
DTPSG2: SETZM DSTORE
HRRZ E,-1(TP) ; GET COUNT IN CASE END
JRST DOTUP1 ; REST OF ARGS STILL TO DO
; HERE TO HACK <ITUPLE .....>
DOITUP: HRRZ C,@(TP) ; GET COUNT FILED
JUMPE C,TFA
MOVEM C,(TP)
PUSHJ P,FASTEV ; EVAL IT
GETYP 0,A
CAIE 0,TFIX
JRST WTY1TP
JUMPL B,BADNUM
HRRZ C,@(TP) ; GET EXP TO EVAL
MOVEI 0,0 ; DONT LOSE IN 1 ARG CASE
HRRZ 0,(C) ; VERIFY WINNAGE
JUMPN 0,TMA ; TOO MANY
JUMPE B,DOIDON
PUSH P,B ; SAVE COUNT
PUSH P,B
JUMPE C,DOILOS
PUSHJ P,FASTEV ; EVAL IT ONCE
MOVEM A,-1(TP)
MOVEM B,(TP)
DOILP: INTGO
PUSH TP,-1(TP)
PUSH TP,-1(TP)
MCALL 1,EVAL
PUSHJ P,CNTRG
SOSLE (P)
JRST DOILP
DOIDO1: MOVE B,-1(P) ; RESTORE COUNT
SUB P,[2,,2]
DOIDON: MOVEI E,(B)
JRST ATUPDN
; FOR CASE OF NO EVALE
DOILOS: SUB TP,[2,,2]
DOILLP: INTGO
PUSH TP,[0]
PUSH TP,[0]
SOSL (P)
JRST DOILLP
JRST DOIDO1
; ROUTINE TO PUSH NEXT TUPLE ELEMENT
CNTARG: AOS E,-1(TP) ; KEEP ARG COUNT UP TO DATE IN E
CNTRG: EXCH A,-1(TP) ; STORE ELEM AND GET SAVED
EXCH B,(TP)
PUSH TP,A
PUSH TP,B
POPJ P,
; DUMMY TUPLE AND ITUPLE
IMFUNCTION TUPLE,SUBR
ENTRY
ERRUUO EQUOTE NOT-IN-AUX-LIST
MFUNCTIO ITUPLE,SUBR
JRST TUPLE
; PROCESS A DCL IN THE AUX VAR LISTS
TRYDCL: SKIPN (P) ; SKIP IF NOT IN AUX'S
JRST AUXB7
CAME B,AS.AUX ; "AUX" ?
CAMN B,AS.EXT ; OR "EXTRA"
JRST AUXB9 ; YES
CAME B,[ASCII /TUPLE/]
JRST AUXB10
PUSHJ P,MAKINF ; BUILD EMPTY TUPLE
MOVEI B,1(TP)
PUSH TP,$TINFO ; FENCE POST
PUSHJ P,TBTOTP
PUSH TP,D
AUXB6: HRRZ C,(C) ; CDR PAST DCL
MOVEM C,RE.ARG+1(TB)
AUXB8: PUSHJ P,CARTMC ; GET ATOM
AUXB12: PUSHJ P,PSHBND ; UP GOES THE BINDING
PUSH TP,$TATOM ; HIDE HEWITT ATOM AND DCL
PUSH TP,-1(P)
PUSH TP,$TDECL
PUSH TP,-2(P)
MOVE E,TP
JRST AUXB5
; CHECK FOR ARGS
AUXB10: CAME B,[ASCII /ARGS/]
JRST AUXB7
MOVEI B,0 ; NULL ARG LIST
MOVSI A,TLIST
JRST AUXB6 ; GO BIND
AUXB9: SETZM (P) ; NOW READING AUX
HRRZ C,(C)
MOVEM C,RE.ARG+1(TB)
JRST AUXB1
; CHECK FOR NAME/ACT
AUXB7: CAME B,AS.NAM
CAMN B,AS.ACT
JRST .+2
JRST MPD.12 ; LOSER
HRRZ C,(C) ; CDR ON
HRRZ 0,(C) ; BETTER BE END
JUMPN 0,MPD.13
PUSHJ P,CARTMC ; FORCE ATOM READ
SETZM RE.ARG+1(TB)
AUXB11: PUSHJ P,MAKACT ; MAKE ACTIVATION
JRST AUXB12 ; AND BIND IT
; DONE BIND HEWITT ATOM IF NECESARY
AUXDON: SKIPN E,-2(P)
JRST AUXD1
SETZM -2(P)
JRST AUXB11
; FINISHED, RETURN
AUXD1: SUB P,[3,,3]
POPJ P,
; MAKE AN ACTIVATION OR ENVIRONMNENT
MAKACT: MOVEI B,(TB)
MOVSI A,TACT
MAKAC1: MOVE PVP,PVSTOR+1
HRRI A,PVLNT*2+1(PVP) ; POINT TO PROCESS
HLL B,OTBSAV(B) ; GET TIME
POPJ P,
MAKENV: MOVSI A,TENV
HRRZ B,OTBSAV(TB)
JRST MAKAC1
; SEVERAL USEFUL LITTLE ROUTINES FOR HACKING THIS STUFF
; CARAT/CARATC/CARATM/CARTMC ALL LOOK FOR THE NEXT ATOM
CARAT: HRRZ C,E.ARGL+1(TB) ; PICK UP ARGLIST
CARATC: JUMPE C,CPOPJ ; FOUND
GETYP 0,(C) ; GET ITS TYPE
CAIE 0,TATOM
CPOPJ: POPJ P, ; RETURN, NOT ATOM
MOVE E,1(C) ; GET ATOM
HRRZ C,(C) ; CDR DCLS
JRST CPOPJ1
CARATM: HRRZ C,E.ARGL+1(TB)
CARTMC: PUSHJ P,CARATC
JRST MPD.7 ; REALLY LOSE
POPJ P,
; SUBROUTINES TO PUSH BINDINGS ETC. UP ON THE STACK
PSBND1: PUSHJ P,PSHBND ; PUSH THEBINDING
JRST CHDCL ; NOW CHECK IT AGAINST DECLARATION
PSHBND: SKIPGE SPCCHK ; SKIP IF NORMAL SPECIAL
PUSH TP,BNDA1 ; ATOM IN E
SKIPL SPCCHK ; SKIP IF NORMAL UNSPEC OR NO CHECK
PUSH TP,BNDA
PUSH TP,E ; PUSH IT
PSHAB4: PUSH TP,A
PUSH TP,B
PUSH TP,[0]
PUSH TP,[0]
POPJ P,
; ROUTINE TO PUSH 4 0'S
PSH4ZR: SETZB A,B
JRST PSHAB4
; EXTRRA ARG GOBBLER
EXTRGT: HRRZ A,E.ARG(TB) ; RESET SLOT
SETZM E.CNT(TB)
CAIE A,ARGCDR ; IF NOT ARGCDR
AOS E.CNT(TB)
TLO A,400000 ; SET FLAG
MOVEM A,E.ARG+1(TB)
MOVE A,E.EXTR(TB) ; RET ARG
MOVE B,E.EXTR+1(TB)
JRST CPOPJ1
; CHECK A/B FOR DEFER
CHKAB: GETYP 0,A
CAIE 0,TDEFER ; SKIP IF DEFER
JRST (E)
MOVE A,(B)
MOVE B,1(B) ; GET REAL THING
JRST (E)
; IF DECLARATIONS EXIST, DO THEM
CHDCL: MOVE E,TP
CHDCLE: SKIPN C,E.DECL+1(TB)
POPJ P,
JRST CHKDCL
; ROUTINE TO READ NEXT THING FROM ARGLIST
NEXTD: HRRZ C,E.ARGL+1(TB) ; GET ARG LIST
NEXTDC: MOVEI A,0
JUMPE C,CPOPJ
PUSHJ P,CARATC ; TRY FOR AN ATOM
JRST NEXTD1 ; NO
JRST CPOPJ1
NEXTD1: CAIE 0,TFORM ; FORM?
JRST NXT.L ; COULD BE LIST
PUSHJ P,CHQT ; VERIFY 'ATOM
MOVEI A,1
JRST CPOPJ1
NXT.L: CAIE 0,TLIST ; COULD BE (A <EXPRESS>) OR ('A <EXPRESS>)
JRST NXT.S ; BETTER BE A DCL
PUSHJ P,LNT.2 ; VERIFY LENGTH IS 2
JRST MPD.8
CAIE 0,TATOM ; TYPE OF 1ST RET IN 0
JRST LST.QT ; MAY BE 'ATOM
MOVE E,1(B) ; GET ATOM
MOVEI A,2
JRST CPOPJ1
LST.QT: CAIE 0,TFORM ; FORM?
JRST MPD.9 ; LOSE
PUSH P,C
MOVEI C,(B) ; VERIFY 'ATOM
PUSHJ P,CHQT
MOVEI B,(C) ; POINT BACK TO LIST
POP P,C
MOVEI A,3 ; CODE
JRST CPOPJ1
NXT.S: MOVEI A,(C) ; LET NXTDCL FIND OUT
PUSHJ P,NXTDCL
JRST MPD.3 ; LOSER
MOVEI A,4 ; SET DCL READ FLAG
JRST CPOPJ1
; ROUTINE TO CHECK LENGTH OF LIST/FORM FOR BEING 2
LNT.2: HRRZ B,1(C) ; GET LIST/FORM
JUMPE B,CPOPJ
HRRZ B,(B)
JUMPE B,CPOPJ
HRRZ B,(B) ; BETTER END HERE
JUMPN B,CPOPJ
HRRZ B,1(C) ; LIST BACK
GETYP 0,(B) ; TYPE OF 1ST ELEMENT
JRST CPOPJ1
; ROUTINE TO VERIFY FORM IS 'ATOM AND RET ATOM
CHQT: PUSHJ P,LNT.2 ; 1ST LENGTH CHECK
JRST MPD.5
CAIE 0,TATOM
JRST MPD.5
MOVE 0,1(B)
CAME 0,IMQUOTE QUOTE
JRST MPD.5 ; BETTER BE QUOTE
HRRZ E,(B) ; CDR
GETYP 0,(E) ; TYPE
CAIE 0,TATOM
JRST MPD.5
MOVE E,1(E) ; GET QUOTED ATOM
POPJ P,
; ARG BINDER FOR REGULAR ARGS AND OPTIONALS
BNDEM1: PUSH P,[0] ; REGULAR FLAG
JRST .+2
BNDEM2: PUSH P,[1]
BNDEM: PUSHJ P,NEXTD ; GET NEXT THING
JRST CCPOPJ ; END OF THINGS
TRNE A,4 ; CHECK FOR DCL
JRST BNDEM4
TRNE A,2 ; SKIP IF NOT (ATM ..) OR ('ATM ...)
SKIPE (P) ; SKIP IF REG ARGS
JRST .+2 ; WINNER, GO ON
JRST MPD.6 ; LOSER
SKIPGE SPCCHK
PUSH TP,BNDA1 ; SAVE ATOM
SKIPL SPCCHK
PUSH TP,BNDA
PUSH TP,E
; SKIPGE E.ARG+1(TB) ; ALREADY EVAL'D ARG?
SKIPE E.CNT(TB)
JRST RGLAR0
TRNN A,1 ; SKIP IF ARG QUOTED
JRST RGLARG
HRRZ D,@E.FRM+1(TB) ; GET AND CDR ARG
JUMPE D,TFACHK ; OH OH MAYBE TOO FEW ARGS
MOVEM D,E.FRM+1(TB) ; STORE WINNER
HLLZ A,(D) ; GET ARG
MOVE B,1(D)
JSP E,CHKAB ; HACK DEFER
JRST BNDEM3 ; AND GO ON
RGLAR0: TRNE A,1 ; ATTEMPT TO QUOTE ALREADY EVAL'D ARG ?
JRST MPD ; YES, LOSE
RGLARG: PUSH P,A ; SAVE FLAGS
PUSHJ P,@E.ARG+1(TB)
JRST TFACH1 ; MAY GE TOO FEW
SUB P,[1,,1]
BNDEM3: HRRZ C,@E.ARGL+1(TB) ; CDR THHE ARGS
MOVEM C,E.ARGL+1(TB)
PUSHJ P,PSHAB4 ; PUSH VALUE AND SLOTS
PUSHJ P,CHDCL ; CHECK DCLS
JRST BNDEM ; AND BIND ON!
; HERE WHEN ARGS RUN OUT, IF NOT OPTIONAL, GIVE TFA
TFACH1: POP P,A
TFACHK: SUB TP,[2,,2] ; FLUSH ATOM
SKIPN (P) ; SKIP IF OPTIONALS
JRST TFA
CCPOPJ: SUB P,[1,,1]
POPJ P,
BNDEM4: HRRZ C,@E.ARGL+1(TB) ; POINT TO REST OF ARGL
JRST CCPOPJ
; EVALUATE LISTS, VECTORS, UNIFROM VECTORS
EVLIST: PUSH P,[-1] ;-1 -- THIS IS A LIST
JRST EVL1 ;GO TO HACKER
EVECT: PUSH P,[0] ;0 -- THIS IS A GENERAL VECTOR
JRST EVL1
EUVEC: PUSH P,[1] ;1 -- THIS IS A UNIFORM VECTOR
EVL1: PUSH P,[0] ;PUSH A COUNTER
GETYPF A,(AB) ;GET FULL TYPE
PUSH TP,A
PUSH TP,1(AB) ;AND VALUE
EVL2: INTGO ;CHECK INTERRUPTS
SKIPN A,1(TB) ;ANYMORE
JRST EVL3 ;NO, QUIT
SKIPL -1(P) ;SKIP IF LIST
JUMPG A,EVL3 ;JUMP IF VECTOR EMPTY
GETYPF B,(A) ;GET FULL TYPE
SKIPGE C,-1(P) ;SKIP IF NOT LIST
HLLZS B ;CLOBBER CDR FIELD
JUMPG C,EVL7 ;HACK UNIFORM VECS
EVL8: PUSH P,B ;SAVE TYPE WORD ON P
CAMN B,$TSEG ;SEGMENT?
MOVSI B,TFORM ;FAKE OUT EVAL
PUSH TP,B ;PUSH TYPE
PUSH TP,1(A) ;AND VALUE
JSP E,CHKARG ; CHECK DEFER
MCALL 1,EVAL ;AND EVAL IT
POP P,C ;AND RESTORE REAL TYPE
CAMN C,$TSEG ;SEGMENT?
JRST DOSEG ;YES, HACK IT
AOS (P) ;COUNT ELEMENT
PUSH TP,A ;AND PUSH IT
PUSH TP,B
EVL6: SKIPGE A,-1(P) ;DONT SKIP IF LIST
HRRZ B,@1(TB) ;CDR IT
JUMPL A,ASTOTB ;AND STORE IT
MOVE B,1(TB) ;GET VECTOR POINTER
ADD B,AMNT(A) ;INCR BY APPROPRIATE AMOUNT
ASTOTB: MOVEM B,1(TB) ;AND STORE BACK
JRST EVL2 ;AND LOOP BACK
AMNT: 2,,2 ;INCR FOR GENERAL VECTOR
1,,1 ;SAME FOR UNIFORM VECTOR
CHKARG: GETYP A,-1(TP)
CAIE A,TDEFER
JRST (E)
HRRZS (TP) ;MAKE SURE INDIRECT WINS
MOVE A,@(TP)
MOVEM A,-1(TP) ;CLOBBER IN TYPE SLOT
MOVE A,(TP) ;NOW GET POINTER
MOVE A,1(A) ;GET VALUE
MOVEM A,(TP) ;CLOBBER IN
JRST (E)
EVL7: HLRE C,A ; FIND TYPE OF UVECTOR
SUBM A,C ;C POINTS TO DOPE WORD
GETYP B,(C) ;GET TYPE
MOVSI B,(B) ;TO LH NOW
SOJA A,EVL8 ;AND RETURN TO DO EVAL
EVL3: SKIPL -1(P) ;SKIP IF LIST
JRST EVL4 ;EITHER VECTOR OR UVECTOR
MOVEI B,0 ;GET A NIL
EVL9: MOVSI A,TLIST ;MAKE TYPE WIN
EVL5: SOSGE (P) ;COUNT DOWN
JRST EVL10 ;DONE, RETURN
PUSH TP,$TLIST ;SET TO CALL CONS
PUSH TP,B
MCALL 2,CONS
JRST EVL5 ;LOOP TIL DONE
EVL4: MOVEI B,EUVECT ;UNIFORM CASE
SKIPG -1(P) ;SKIP IF UNIFORM CASE
MOVEI B,EVECTO ;NO, GENERAL CASE
POP P,A ;GET COUNT
.ACALL A,(B) ;CALL CREATOR
EVL10: GETYPF A,(AB) ; USE SENT TYPE
JRST EFINIS
; PROCESS SEGMENTS FOR THESE HACKS
DOSEG: PUSHJ P,TYPSEG ; FIND WHAT IS BEING SEGMENTED
JUMPE C,LSTSEG ; CHECK END SPLICE IF LIST
SEG3: PUSHJ P,NXTELM ; GET THE NEXTE ELEMT
JRST SEG4 ; RETURN TO CALLER
AOS (P) ; COUNT
JRST SEG3 ; TRY AGAIN
SEG4: SETZM DSTORE
JRST EVL6
TYPSEG: PUSHJ P,TYPSGR
JRST ILLSEG
POPJ P,
TYPSGR: MOVE E,A ; SAVE TYPE
GETYP A,A ; TYPE TO RH
PUSHJ P,SAT ;GET STORAGE TYPE
MOVE D,B ; GOODIE TO D
MOVNI C,1 ; C <0 IF ILLEGAL
CAIN A,S2WORD ;LIST?
MOVEI C,0
CAIN A,S2NWORD ;GENERAL VECTOR?
MOVEI C,1
CAIN A,SNWORD ;UNIFORM VECTOR?
MOVEI C,2
CAIN A,SCHSTR
MOVEI C,3
CAIN A,SBYTE
MOVEI C,5
CAIN A,SSTORE ;SPECIAL AFREE STORAGE ?
MOVEI C,4 ;TREAT LIKE A UVECTOR
CAIN A,SARGS ;ARGS TUPLE?
JRST SEGARG ;NO, ERROR
CAILE A,NUMSAT ; SKIP IF NOT TEMPLATE
JRST SEGTMP
MOVE A,PTYPS(C)
CAIN A,4
MOVEI A,2 ; NOW TREAT LIKE A UVECTOR
HLL E,A
MSTOR1: JUMPL C,CPOPJ
MDSTOR: MOVEM E,DSTORE
JRST CPOPJ1
SEGTMP: MOVEI C,4
HRRI E,(A)
JRST MSTOR1
SEGARG: MOVSI A,TARGS
HRRI A,(E)
PUSH TP,A ;PREPARE TO CHECK ARGS
PUSH TP,D
MOVEI B,-1(TP) ;POINT TO SAVED COPY
PUSHJ P,CHARGS ;CHECK ARG POINTER
POP TP,D ;AND RESTORE WINNER
POP TP,E ;AND TYPE AND FALL INTO VECTOR CODE
MOVEI C,1
JRST MSTOR1
LSTSEG: SKIPL -1(P) ;SKIP IF IN A LIST
JRST SEG3 ;ELSE JOIN COMMON CODE
HRRZ A,@1(TB) ;CHECK FOR END OF LIST
JUMPN A,SEG3 ;NO, JOIN COMMON CODE
SETZM DSTORE ;CLOBBER SAVED GOODIES
JRST EVL9 ;AND FINISH UP
NXTELM: INTGO
PUSHJ P,NXTLM ; GOODIE TO A AND B
POPJ P, ; DONE
PUSH TP,A
PUSH TP,B
JRST CPOPJ1
NXTLM: XCT TESTR(C) ; SKIP IF MORE IN SEGEMNT
POPJ P,
XCT TYPG(C) ; GET THE TYPE
XCT VALG(C) ; AND VALUE
JSP E,CHKAB ; CHECK DEFERRED
XCT INCR1(C) ; AND INCREMENT TO NEXT
CPOPJ1: AOS (P) ; SKIP RETURN
POPJ P,
; TABLES FOR SEGMENT OPERATIONS (0->LIST, 1->VECTOR/ARGS, 2->UVEC, 3->STRING)
PTYPS: TLIST,,
TVEC,,
TUVEC,,
TCHSTR,,
TSTORA,,
TBYTE,,
TESTR: SKIPN D
SKIPL D
SKIPL D
PUSHJ P,CHRDON
PUSHJ P,TM1
PUSHJ P,CHRDON
TYPG: PUSHJ P,LISTYP
GETYPF A,(D)
PUSHJ P,UTYPE
MOVSI A,TCHRS
PUSHJ P,TM2
MOVSI A,TFIX
VALG: MOVE B,1(D)
MOVE B,1(D)
MOVE B,(D)
PUSHJ P,1CHGT
PUSHJ P,TM3
PUSHJ P,1CHGT
INCR1: HRRZ D,(D)
ADD D,[2,,2]
ADD D,[1,,1]
PUSHJ P,1CHINC
ADD D,[1,,]
PUSHJ P,1CHINC
TM1: HRRZ A,DSTORE
SKIPE DSTORE
HRRZ A,DSTORE ; GET SAT
SUBI A,NUMSAT+1
ADD A,TD.LNT+1
EXCH C,D
XCT (A)
HLRZ 0,C ; GET AMNT RESTED
SUB B,0
EXCH C,D
TRNE B,-1
AOS (P)
POPJ P,
TM3:
TM2: HRRZ 0,DSTORE
SKIPE DSTORE
HRRZ 0,DSTORE
PUSH P,C
PUSH P,D
PUSH P,E
MOVE B,D
MOVEI C,0 ; GET "1ST ELEMENT"
PUSHJ P,TMPLNT ; GET NTH IN A AND B
POP P,E
POP P,D
POP P,C
POPJ P,
CHRDON: HRRZ B,DSTORE
SKIPE DSTORE
HRRZ B,DSTORE ; POIT TO DOPE WORD
JUMPE B,CHRFIN
AOS (P)
CHRFIN: POPJ P,
LISTYP: GETYP A,(D)
MOVSI A,(A)
POPJ P,
1CHGT: MOVE B,D
ILDB B,B
POPJ P,
1CHINC: IBP D
SKIPN DSTORE
JRST 1CHIN1
SOS DSTORE
POPJ P,
1CHIN1: SOS DSTORE
POPJ P,
UTYPE: HLRE A,D
SUBM D,A
GETYP A,(A)
MOVSI A,(A)
POPJ P,
;COMPILER's CALL TO DOSEG
SEGMNT: PUSHJ P,TYPSEG
SEGLP1: SETZB A,B
SEGLOP: PUSHJ P,NXTELM
JRST SEGRET
AOS (P)-2 ; INCREMENT COMPILER'S COUNT
JRST SEGLOP
SEGRET: SETZM DSTORE
POPJ P,
SEGLST: PUSHJ P,TYPSEG
JUMPN C,SEGLS2
SEGLS3: SETZM DSTORE
MOVSI A,TLIST
SEGLS1: SOSGE -2(P) ; START COUNT DOWN
POPJ P,
MOVEI E,(B)
POP TP,D
POP TP,C
PUSHJ P,ICONS
JRST SEGLS1
SEGLS2: PUSHJ P,NXTELM
JRST SEGLS4
AOS -2(P)
JRST SEGLS2
SEGLS4: MOVEI B,0
JRST SEGLS3
;SPECBIND BINDS IDENTIFIERS. IT IS CALLED BY PUSHJ P,SPECBIND.
;SPECBIND IS PROVIDED WITH A CONTIGUOUS SET OF TRIPLETS ON TP.
;EACH TRIPLET IS AS FOLLOWS:
;THE FIRST ELEMENT IS THE IDENTIFIER TO BE BOUND, ITS TYPE WORD IS [TATOM,,-1],
;THE SECOND IS THE VALUE TO WHICH IT IS TO BE ASSIGNED,
;AND THE THIRD IS A PAIR OF ZEROES.
BNDA1: TATOM,,-2
BNDA: TATOM,,-1
BNDV: TVEC,,-1
USPECBIND:
MOVE E,TP
USPCBE: PUSH P,$TUBIND
JRST .+3
SPECBIND:
MOVE E,TP ;GET THE POINTER TO TOP
SPECBE: PUSH P,$TBIND
ADD E,[1,,1] ;BUMP POINTER ONCE
SETZB 0,D ;CLEAR TEMPS
PUSH P,0
MOVEI 0,(TB) ; FOR CHECKS
BINDLP: MOVE A,-4(E) ; CHECK FOR VEC BIND
CAMN A,BNDV
JRST NONID
MOVE A,-6(E) ;GET TYPE
CAME A,BNDA1 ; FOR UNSPECIAL
CAMN A,BNDA ;NORMAL ID BIND?
CAILE 0,-6(E) ; MAKE SURE NOT GOING UNDER FRAME
JRST SPECBD
SUB E,[6,,6] ;MOVE PTR
SKIPE D ;LINK?
HRRM E,(D) ;YES -- LOBBER
SKIPN (P) ;UPDATED?
MOVEM E,(P) ;NO -- DO IT
MOVE A,0(E) ;GET ATOM PTR
MOVE B,1(E)
PUSHJ P,SILOC ;GET LAST BINDING
MOVS A,OTBSAV (TB) ;GET TIME
HRL A,5(E) ; GET DECL POINTER
MOVEM A,4(E) ;CLOBBER IT AWAY
MOVE A,(E) ; SEE IF SPEC/UNSPEC
TRNN A,1 ; SKIP, ALWAYS SPEC
SKIPA A,-1(P) ; USE SUPPLIED
MOVSI A,TBIND
MOVEM A,(E) ;IDENTIFY AS BIND BLOCK
JUMPE B,SPEB10
MOVE PVP,PVSTOR+1
HRRZ C,SPBASE(PVP) ; CHECK FOR CROSS OF PROC
MOVEI A,(TP)
CAIL A,(B) ; LOSER
CAILE C,(B) ; SKIP IFF WINNER
MOVEI B,1
SPEB10: MOVEM B,5(E) ;IN RESTORE CELLS
MOVE C,1(E) ;GET ATOM PTR
SKIPE (C)
JUMPE B,.-4
MOVEI A,(C)
MOVEI B,0 ; FOR SPCUNP
CAIL A,HIBOT ; SKIP IF IMPURE ATOM
PUSHJ P,SPCUNP
MOVE PVP,PVSTOR+1
HRRZ A,BINDID+1(PVP) ;GET PROCESS NUMBER
HRLI A,TLOCI ;MAKE LOC PTR
MOVE B,E ;TO NEW VALUE
ADD B,[2,,2]
MOVEM A,(C) ;CLOBBER ITS VALUE
MOVEM B,1(C) ;CELL
MOVE D,E ;REMEMBER LINK
JRST BINDLP ;DO NEXT
NONID: CAILE 0,-4(E)
JRST SPECBD
SUB E,[4,,4]
SKIPE D
HRRM E,(D)
SKIPN (P)
MOVEM E,(P)
MOVE D,1(E) ;GET PTR TO VECTOR
MOVE C,(D) ;EXCHANGE TYPES
EXCH C,2(E)
MOVEM C,(D)
MOVE C,1(D) ;EXCHANGE DATUMS
EXCH C,3(E)
MOVEM C,1(D)
MOVEI A,TBVL
HRLM A,(E) ;IDENTIFY BIND BLOCK
MOVE D,E ;REMEMBER LINK
JRST BINDLP
SPECBD: SKIPE D
MOVE SP,SPSTOR+1
HRRM SP,(D)
SKIPE D,(P)
MOVEM D,SPSTOR+1
SUB P,[2,,2]
POPJ P,
; HERE TO IMPURIFY THE ATOM
SPCUNP: PUSH TP,$TSP
PUSH TP,E
PUSH TP,$TSP
PUSH TP,-1(P) ; LINK BACK IS AN SP
PUSH TP,$TSP
PUSH TP,B
CAIN B,1
SETZM -1(TP) ; FIXUP SOME FUNNYNESS
MOVE B,C
PUSHJ P,IMPURIFY
MOVE 0,-2(TP) ; RESTORE LINK BACK POINTER
MOVEM 0,-1(P)
MOVE E,-4(TP)
MOVE C,B
MOVE B,(TP)
SUB TP,[6,,6]
MOVEI 0,(TB)
POPJ P,
; ENTRY FROM COMPILER TO SET UP A BINDING
IBIND: MOVE SP,SPSTOR+1
SUBI E,-5(SP) ; CHANGE TO PDL POINTER
HRLI E,(E)
ADD E,SP
MOVEM C,-4(E)
MOVEM A,-3(E)
MOVEM B,-2(E)
HRLOI A,TATOM
MOVEM A,-5(E)
MOVSI A,TLIST
MOVEM A,-1(E)
MOVEM D,(E)
JRST SPECB1 ; NOW BIND IT
; "FAST CALL TO SPECBIND"
; Compiler's call to SPECBIND all atom bindings, no TBVLs etc.
SPECBND:
MOVE E,TP ; POINT TO BINDING WITH E
SPECB1: PUSH P,[0] ; SLOTS OF INTEREST
PUSH P,[0]
SUBM M,-2(P)
SPECB2: MOVEI 0,(TB) ; FOR FRAME CHECK
MOVE A,-5(E) ; LOOK AT FIRST THING
CAMN A,BNDA ; SKIP IF LOSER
CAILE 0,-5(E) ; SKIP IF REAL WINNER
JRST SPECB3
SUB E,[5,,5] ; POINT TO BINDING
SKIPE A,(P) ; LINK?
HRRM E,(A) ; YES DO IT
SKIPN -1(P) ; FIRST ONE?
MOVEM E,-1(P) ; THIS IS IT
MOVE A,1(E) ; POINT TO ATOM
MOVE PVP,PVSTOR+1
MOVE 0,BINDID+1(PVP) ; QUICK CHECK
HRLI 0,TLOCI
CAMN 0,(A) ; WINNERE?
JRST SPECB4 ; YES, GO ON
PUSH P,B ; SAVE REST OF ACS
PUSH P,C
PUSH P,D
MOVE B,A ; FOR ILOC TO WORK
PUSHJ P,SILOC ; GO LOOK IT UP
JUMPE B,SPECB9
MOVE PVP,PVSTOR+1
HRRZ C,SPBASE+1(PVP)
MOVEI A,(TP)
CAIL A,(B) ; SKIP IF LOSER
CAILE C,(B) ; SKIP IF WINNER
MOVEI B,1 ; SAY NO BACK POINTER
SPECB9: MOVE C,1(E) ; POINT TO ATOM
SKIPE (C) ; IF GLOBALLY BOUND, MAKE SURE OK
JUMPE B,.-3
MOVEI A,(C) ; PURE ATOM?
CAIGE A,HIBOT ; SKIP IF OK
JRST .+4
PUSH P,-4(P) ; MAKE HAPPINESS
PUSHJ P,SPCUNP ; IMPURIFY
POP P,-5(P)
MOVE PVP,PVSTOR+1
MOVE A,BINDID+1(PVP)
HRLI A,TLOCI
MOVEM A,(C) ; STOR POINTER INDICATOR
MOVE A,B
POP P,D
POP P,C
POP P,B
JRST SPECB5
SPECB4: MOVE A,1(A) ; GET LOCATIVE
SPECB5: EXCH A,5(E) ; CLOBBER INTO REBIND SLOT (GET DECL)
HLL A,OTBSAV(TB) ; TIME IT
MOVSM A,4(E) ; SAVE DECL AND TIME
MOVEI A,TBIND
HRLM A,(E) ; CHANGE TO A BINDING
MOVE A,1(E) ; POINT TO ATOM
MOVEM E,(P) ; REMEMBER THIS GUY
ADD E,[2,,2] ; POINT TO VAL CELL
MOVEM E,1(A) ; INTO ATOM SLOT
SUB E,[3,,3] ; POINT TO NEXT ONE
JRST SPECB2
SPECB3: SKIPE A,(P)
MOVE SP,SPSTOR+1
HRRM SP,(A) ; LINK OLD STUFF
SKIPE A,-1(P) ; NEW SP?
MOVEM A,SPSTOR+1
SUB P,[2,,2]
INTGO ; IN CASE BLEW STACK
SUBM M,(P)
POPJ P,
;SPECSTORE RESTORES THE BINDINGS SP TO THE ENVIRONMENT POINTER IN
;SPSAV (TB). IT IS CALLED BY PUSHJ P,SPECSTORE.
SPECSTORE:
PUSH P,E
HRRZ E,SPSAV (TB) ;GET TARGET POINTER
PUSHJ P,STLOOP
POP P,E
MOVE SP,SPSAV(TB) ; GET NEW SP
MOVEM SP,SPSTOR+1
POPJ P,
STLOOP: MOVE SP,SPSTOR+1
PUSH P,D
PUSH P,C
STLOO1: CAIL E,(SP) ;ARE WE DONE?
JRST STLOO2
HLRZ C,(SP) ;GET TYPE OF BIND
CAIN C,TUBIND
JRST .+3
CAIE C,TBIND ;NORMAL IDENTIFIER?
JRST ISTORE ;NO -- SPECIAL HACK
MOVE C,1(SP) ;GET TOP ATOM
MOVSI 0,TLOCI ; MAYBE LOCI OR UNBOUND
SKIPL D,5(SP)
MOVSI 0,TUNBOU
MOVE PVP,PVSTOR+1
HRR 0,BINDID+1(PVP) ;STORE SIGNATURE
SKIPN 5(SP)
MOVEI 0,0 ; TOTALLY UNBOUND IN ALL CASES
MOVEM 0,(C) ;CLOBBER INTO ATOM
MOVEM D,1(C)
SETZM 4(SP)
SPLP: HRRZ SP,(SP) ;FOLOW LINK
JUMPN SP,STLOO1 ;IF MORE
SKIPE E ; OK IF E=0
FATAL SP OVERPOP
STLOO2: MOVEM SP,SPSTOR+1
POP P,C
POP P,D
POPJ P,
ISTORE: CAIE C,TBVL
JRST CHSKIP
MOVE C,1(SP)
MOVE D,2(SP)
MOVEM D,(C)
MOVE D,3(SP)
MOVEM D,1(C)
JRST SPLP
CHSKIP: CAIN C,TSKIP
JRST SPLP
CAIE C,TUNWIN ; UNWIND HACK
FATAL BAD SP
HRRZ C,-2(P) ; WHERE FROM?
CAIE C,CHUNPC
JRST SPLP ; IGNORE
MOVEI E,(TP) ; FIXUP SP
SUBI E,(SP)
MOVSI E,(E)
HLL SP,TP
SUB SP,E
POP P,C
POP P,D
AOS (P)
POPJ P,
; ENTRY FOR FUNNY COMPILER UNBIND (1)
SSPECS: PUSH P,E
MOVEI E,(TP)
PUSHJ P,STLOOP
SSPEC2: SUBI E,(SP) ; MAKE SP BE AOBJN
MOVSI E,(E)
HLL SP,TP
SUB SP,E
MOVEM SP,SPSTOR+1
POP P,E
POPJ P,
; ENTRY FOR FUNNY COMPILER UNBIND (2)
SSPEC1: PUSH P,E
SUBI E,1 ; MAKE SURE GET CURRENT BINDING
PUSHJ P,STLOOP ; UNBIND
MOVEI E,(TP) ; NOW RESET SP
JRST SSPEC2
EFINIS: MOVE PVP,PVSTOR+1
SKIPN C,1STEPR+1(PVP) ; SKIP NIF BEING ONE PROCEEDED
JRST FINIS
PUSH TP,$TATOM
PUSH TP,MQUOTE EVLOUT
PUSH TP,A ;SAVE EVAL RESULTS
PUSH TP,B
PUSH TP,[TINFO,,2] ; FENCE POST
PUSHJ P,TBTOTP
PUSH TP,D
PUSHJ P,MAKINF ; MAKE ARG BLOCK INFO
PUSH TP,A
MOVEI B,-6(TP)
HRLI B,-4 ; AOBJN TO ARGS BLOCK
PUSH TP,B
MOVE PVP,PVSTOR+1
PUSH TP,1STEPR(PVP)
PUSH TP,1STEPR+1(PVP) ; PROCESS DOING THE 1STEPPING
MCALL 2,RESUME
MOVE A,-3(TP) ; GET BACK EVAL VALUE
MOVE B,-2(TP)
JRST FINIS
1STEPI: PUSH TP,$TATOM
PUSH TP,MQUOTE EVLIN
PUSH TP,$TAB ; PUSH EVALS ARGGS
PUSH TP,AB
PUSHJ P,MAKINF ; TURN INTO ARGS BLOCK
MOVEM A,-1(TP) ; AND CLOBBER
PUSH TP,[TINFO,,2] ; FENCE POST 2D TUPLE
PUSHJ P,TBTOTP
PUSH TP,D
PUSHJ P,MAKINF ; TURN IT INTO ARGS BLOCK
PUSH TP,A
MOVEI B,-6(TP) ; SETUP TUPLE
HRLI B,-4
PUSH TP,B
MOVE PVP,PVSTOR+1
PUSH TP,1STEPR(PVP)
PUSH TP,1STEPR+1(PVP)
MCALL 2,RESUME ; START UP 1STEPERR
SUB TP,[6,,6] ; REMOVE CRUD
GETYP A,A ; GET 1STEPPERS TYPE
CAIE A,TDISMI ; IF DISMISS, STOP 1 STEPPING
JRST EVALON
; HERE TO PUSH DOWN THE 1 STEP STATE AND RUN
MOVE D,PVP
ADD D,[1STEPR,,1STEPR] ; POINT TO 1 STEP SLOT
PUSH TP,$TSP ; SAVE CURRENT SP
PUSH TP,SPSTOR+1
PUSH TP,BNDV
PUSH TP,D ; BIND IT
PUSH TP,$TPVP
PUSH TP,[0] ; NO 1 STEPPER UNTIL POPJ
PUSHJ P,SPECBIND
; NOW PUSH THE ARGS UP TO RE-CALL EVAL
MOVEI A,0
EFARGL: JUMPGE AB,EFCALL
PUSH TP,(AB)
PUSH TP,1(AB)
ADD AB,[2,,2]
AOJA A,EFARGL
EFCALL: ACALL A,EVAL ; NOW DO THE EVAL
MOVE C,(TP) ; PRE-UNBIND
MOVE PVP,PVSTOR+1
MOVEM C,1STEPR+1(PVP)
MOVE SP,-4(TP) ; AVOID THE UNBIND
MOVEM SP,SPSTOR+1
SUB TP,[6,,6] ; AND FLUSH LOSERS
JRST EFINIS ; AND TRY TO FINISH UP
MAKINF: HLRZ A,OTBSAV(TB) ; TIME IT
HRLI A,TARGS
POPJ P,
TBTOTP: MOVEI D,(TB) ; COMPUTE REL DIST FROM TP TO TB
SUBI D,(TP)
POPJ P,
; ARRIVE HERE TO COMPLETE A COMPILER GENERATED TUPLE
; D/ LENGTH OF THE TUPLE IN WORDS
MAKTU2: MOVE D,-1(P) ; GET LENGTH
ASH D,1
PUSHJ P,MAKTUP
PUSH TP,A
PUSH TP,B
POPJ P,
MAKTUP: HRLI D,TINFO ; FIRST WORD OF FENCE POST
PUSH TP,D
HRROI B,(TP) ; TOP OF TUPLE
SUBI B,(D)
TLC B,-1(D) ; AOBJN IT
PUSHJ P,TBTOTP
PUSH TP,D
HLRZ A,OTBSAV(TB) ; TIME IT
HRLI A,TARGS
POPJ P,
; HERE TO ALLOCATE SLOTS FOR COMPILER (AMNT IN A)
TPALOC: SUBM M,(P)
;Once here ==>ADDI A,1 Bug???
HRLI A,(A)
ADD TP,A
PUSH P,A
SKIPL TP
PUSHJ P,TPOVFL ; IN CASE IT LOST
INTGO ; TAKE THE GC IF NEC
HRRI A,2(TP)
SUB A,(P)
SETZM -1(A)
HRLI A,-1(A)
BLT A,(TP)
SUB P,[1,,1]
JRST POPJM
NTPALO: PUSH TP,[0]
SOJG 0,.-1
POPJ P,
;EVALUATES A IDENTIFIER -- GETS LOCAL VALUE IF THERE IS ONE, OTHERWISE GLOBAL.
IMFUNCTION VALUE,SUBR
JSP E,CHKAT
PUSHJ P,IDVAL
JRST FINIS
IDVAL: PUSHJ P,IDVAL1
CAMN A,$TUNBOU
JRST UNBOU
POPJ P,
IDVAL1: PUSH TP,A
PUSH TP,B ;SAVE ARG IN CASE NEED TO CHECK GLOBAL VALUE
PUSHJ P,ILVAL ;LOCAL VALUE FINDER
CAME A,$TUNBOUND ;IF NOT UNBOUND OR UNASSIGNED
JRST RIDVAL ;DONE - CLEAN UP AND RETURN
POP TP,B ;GET ARG BACK
POP TP,A
JRST IGVAL
RIDVAL: SUB TP,[2,,2]
POPJ P,
;GETS THE LOCAL VALUE OF AN IDENTIFIER
IMFUNCTION LVAL,SUBR
JSP E,CHKAT
PUSHJ P,AILVAL
CAME A,$TUNBOUND
JRST FINIS
JUMPN B,UNAS
JRST UNBOU
; MAKE AN ATOM UNASSIGNED
MFUNCTION UNASSIGN,SUBR
JSP E,CHKAT ; GET ATOM ARG
PUSHJ P,AILOC
UNASIT: CAMN A,$TUNBOU ; IF UNBOUND
JRST RETATM
MOVSI A,TUNBOU
MOVEM A,(B)
SETOM 1(B) ; MAKE SURE
RETATM: MOVE B,1(AB)
MOVE A,(AB)
JRST FINIS
; UNASSIGN GLOBALLY
MFUNCTION GUNASSIGN,SUBR
JSP E,CHKAT2
PUSHJ P,IGLOC
CAMN A,$TUNBOU
JRST RETATM
MOVE B,1(AB) ; ATOM BACK
MOVEI 0,(B)
CAIL 0,HIBOT ; SKIP IF IMPURE
PUSHJ P,IMPURIFY ; YES, MAKE IT IMPURE
PUSHJ P,IGLOC ; RESTORE LOCATIVE
HRRZ 0,-2(B) ; SEE IF MANIFEST
GETYP A,(B) ; AND CURRENT TYPE
CAIN 0,-1
CAIN A,TUNBOU
JRST UNASIT
SKIPE IGDECL
JRST UNASIT
MOVE D,B
JRST MANILO
; GETS A LOCATIVE TO THE LOCAL VALUE OF AN IDENTIFIER.
MFUNCTION LLOC,SUBR
JSP E,CHKAT
PUSHJ P,AILOC
CAMN A,$TUNBOUND
JRST UNBOU
MOVSI A,TLOCD
HRR A,2(B)
JRST FINIS
;TESTS TO SEE IF AN IDENTIFIER IS LOCALLY BOUND
MFUNCTION BOUND,SUBR,[BOUND?]
JSP E,CHKAT
PUSHJ P,AILVAL
CAMN A,$TUNBOUND
JUMPE B,IFALSE
JRST TRUTH
;TESTS TO SEE IF AN IDENTIFIER IS LOCALLY ASSIGNED
MFUNCTION ASSIGP,SUBR,[ASSIGNED?]
JSP E,CHKAT
PUSHJ P,AILVAL
CAME A,$TUNBOUND
JRST TRUTH
; JUMPE B,UNBOU
JRST IFALSE
;GETS THE GLOBAL VALUE OF AN IDENTIFIER
IMFUNCTION GVAL,SUBR
JSP E,CHKAT2
PUSHJ P,IGVAL
CAMN A,$TUNBOUND
JRST UNAS
JRST FINIS
;GETS A LOCATIVE TO THE GLOBAL VALUE OF AN IDENTIFIER
MFUNCTION RGLOC,SUBR
JRST GLOC
MFUNCTION GLOC,SUBR
JUMPGE AB,TFA
CAMGE AB,[-5,,]
JRST TMA
JSP E,CHKAT1
MOVEI E,IGLOC
CAML AB,[-2,,]
JRST .+4
GETYP 0,2(AB)
CAIE 0,TFALSE
MOVEI E,IIGLOC
PUSHJ P,(E)
CAMN A,$TUNBOUND
JRST UNAS
MOVSI A,TLOCD
HRRZ 0,FSAV(TB)
CAIE 0,GLOC
MOVSI A,TLOCR
CAIE 0,GLOC
SUB B,GLOTOP+1
MOVE C,1(AB) ; GE ATOM
MOVEI 0,(C)
CAIGE 0,HIBOT ; SKIP IF PURE ATOM
JRST FINIS
; MAKE ATOM AND VALUE IMPURE IF GETTING GLOC TO IT
MOVE B,C ; ATOM TO B
PUSHJ P,IMPURIFY
JRST GLOC ; AND TRY AGAIN
;TESTS TO SEE IF AN IDENTIFIER IS GLOBALLY ASSIGNED
MFUNCTION GASSIG,SUBR,[GASSIGNED?]
JSP E,CHKAT2
PUSHJ P,IGVAL
CAMN A,$TUNBOUND
JRST IFALSE
JRST TRUTH
; TEST FOR GLOBALLY BOUND
MFUNCTION GBOUND,SUBR,[GBOUND?]
JSP E,CHKAT2
PUSHJ P,IGLOC
JUMPE B,IFALSE
JRST TRUTH
CHKAT2: ENTRY 1
CHKAT1: GETYP A,(AB)
MOVSI A,(A)
CAME A,$TATOM
JRST NONATM
MOVE B,1(AB)
JRST (E)
CHKAT: HLRE A,AB ; - # OF ARGS
ASH A,-1 ; TO ACTUAL WORDS
JUMPGE AB,TFA
MOVE C,SPSTOR+1 ; FOR BINDING LOOKUPS
AOJE A,CHKAT1 ; ONLY ONE ARG, NO ENVIRONMENT
AOJL A,TMA ; TOO MANY
GETYP A,2(AB) ; MAKE SURE OF TENV OR TFRAME
CAIE A,TFRAME
CAIN A,TENV
JRST CHKAT3
CAIN A,TACT ; FOR PFISTERS LOSSAGE
JRST CHKAT3
CAIE A,TPVP ; OR PROCESS
JRST WTYP2
MOVE B,3(AB) ; GET PROCESS
MOVE C,SPSTOR+1 ; IN CASE ITS ME
CAME B,PVSTOR+1 ; SKIP IF DIFFERENT
MOVE C,SPSTO+1(B) ; GET ITS SP
JRST CHKAT1
CHKAT3: MOVEI B,2(AB) ; POINT TO FRAME POINTER
PUSHJ P,CHFRM ; VALIDITY CHECK
MOVE B,3(AB) ; GET TB FROM FRAME
MOVE C,SPSAV(B) ; GET ENVIRONMENT POINTER
JRST CHKAT1
; SILOC--CALLS ILOC IGNORING SPECIAL CHECKING
SILOC: JFCL
;ILOC RETURNS IN A AND B A LOCATIVE TO THE LOCAL VALUE OF THE IDENTIFIER
; PASSED TO IT IN A AND B. IF THE IDENTIFIER IS LOCALLY UNBOUND IT RETURNS
; $TUNBOUND IN A AND 0 IN B, IT IS CALLED BY PUSHJ P,ILOC.
ILOC: MOVE C,SPSTOR+1 ; SETUP SEARCH START
AILOC: SKIPN (B) ; ANY KIND OF VALUE AT ALL?
JUMPN B,FUNPJ
MOVSI A,TLOCI ;MAKE A LOCATIVE TYPE CELL
PUSH P,E
PUSH P,D
MOVEI E,0 ; FLAG TO CLOBBER ATOM
JUMPE B,SCHSP ; IF LOOKING FOR SLOT, SEARCH NOW
CAME C,SPSTOR+1 ; ENVIRONMENT CHANGE?
JRST SCHSP ; YES, MUST SEARCH
MOVE PVP,PVSTOR+1
HRR A,BINDID+1(PVP) ;FOR THE CURRENT PROCESS
CAME A,(B) ;IS THERE ONE IN THE VALUE CELL?
JRST SCHLP ;NO -- SEARCH THE LOCAL BINDINGS
MOVE B,1(B) ;YES -- GET LOCATIVE POINTER
MOVE C,PVP
ILCPJ: MOVE E,SPCCHK
TRNN E,1 ; SKIP IF DOING SPEC UNSPEC CHECK
JRST ILOCPJ
HRRZ E,-2(P) ; IF IGNORING, IGNORE
HRRZ E,-1(E)
CAIN E,SILOC
JRST ILOCPJ
HLRZ E,-2(B)
CAIE E,TUBIND
JRST ILOCPJ
CAMGE B,CURFCN+1(PVP)
JRST SCHLPX
MOVEI D,-2(B)
HRRZ SP,SPSTOR+1
CAIG D,(SP)
CAMGE B,SPBASE+1(PVP)
JRST SCHLPX
MOVE C,PVSTOR+1
ILOCPJ: POP P,D
POP P,E
POPJ P, ;FROM THE VALUE CELL
SCHLPX: MOVEI E,1
MOVE C,SPSTOR+1
MOVE B,-1(B)
JRST SCHLP
SCHLP5: SETOM (P)
JRST SCHLP2
SCHLP: MOVEI D,(B)
CAIL D,HIBOT ; SKIP IF IMPURE ATOM
SCHSP: MOVEI E,1 ; DONT STORE LOCATIVE
PUSH P,E ; PUSH SWITCH
MOVE E,PVSTOR+1 ; GET PROC
SCHLP1: JUMPE C,UNPJ ;IF NO MORE -- LOSE
CAMN B,1(C) ;ARE WE POINTING AT THE WINNER?
JRST SCHFND ;YES
GETYP D,(C) ; CHECK SKIP
CAIE D,TSKIP
JRST SCHLP2
PUSH P,B ; CHECK DETOUR
MOVEI B,2(C)
PUSHJ P,CHFRAM ; NON-FATAL FRAME CHECKER
HRRZ E,2(C) ; CONS UP PROCESS
SUBI E,PVLNT*2+1
HRLI E,-2*PVLNT
JUMPE B,SCHLP3 ; LOSER, FIX IT
POP P,B
MOVEI C,1(C) ; FOLLOW LOOKUP CHAIN
SCHLP2: HRRZ C,(C) ;FOLLOW LINK
JRST SCHLP1
SCHLP3: POP P,B
HRRZ SP,SPSTOR+1
MOVEI C,(SP) ; *** NDR'S BUG ***
CAME E,PVSTOR+1 ; USE IF CURRENT PROCESS
HRRZ C,SPSTO+1(E) ; USE CURRENT SP FOR PROC
JRST SCHLP1
SCHFND: MOVE D,SPCCHK
TRNN D,1 ; SKIP IF DOING SPEC UNSPEC CHECK
JRST SCHFN1
HRRZ D,-2(P) ; IF IGNORING, IGNORE
HRRZ D,-1(D)
CAIN D,SILOC
JRST ILOCPJ
HLRZ D,(C)
CAIE D,TUBIND
JRST SCHFN1
HRRZ D,CURFCN+1(PVP)
CAIL D,(C)
JRST SCHLP5
HRRZ SP,SPSTOR+1
HRRZ D,SPBASE+1(PVP)
CAIL SP,(C)
CAIL D,(C)
JRST SCHLP5
SCHFN1: EXCH B,C ;SAVE THE ATOM PTR IN C
MOVEI B,2(B) ;MAKE UP THE LOCATIVE
SUB B,TPBASE+1(E)
HRLI B,(B)
ADD B,TPBASE+1(E)
EXCH C,E ; RET PROCESS IN C
POP P,D ; RESTORE SWITCH
JUMPN D,ILOCPJ ; DONT CLOBBER ATOM
MOVEM A,(E) ;CLOBBER IT AWAY INTO THE
MOVE D,1(E) ; GET OLD POINTER
MOVEM B,1(E) ;ATOM'S VALUE CELL
JUMPE D,ILOCPJ ; IF POINTS TO GLOBAL OR OTHER PROCES
; MAKE SURE BINDING SO INDICATES
MOVE D,B ; POINT TO BINDING
SKIPL E,3(D) ; GO TO FIRST ONE, JUST IN CASE
JRST .+3
MOVE D,E
JRST .-3 ; LOOP THROUGH
MOVEI E,1
MOVEM E,3(D) ; MAGIC INDICATION
JRST ILOCPJ
UNPJ: SUB P,[1,,1] ; FLUSH CRUFT
UNPJ1: MOVE C,E ; RET PROCESS ANYWAY
UNPJ11: POP P,D
POP P,E
UNPOPJ: MOVSI A,TUNBOUND
MOVEI B,0
POPJ P,
FUNPJ: MOVE C,PVSTOR+1
JRST UNPOPJ
;IGLOC RETURNS IN A AND B A LOCATIVE TO THE GLOBAL VALUE OF THE
;IDENTIFIER PASSED TO IT IN A AND B. IF THE IDENTIFIER IS GLOBALLY
;UNBPOUND IT RETURNS $TUNBOUND IN A AND 0 IN B. IT IS CALLED BY PUSHJ P,IGLOC.
IGLOC: MOVSI A,TLOCI ;DO WE HAVE A LOCATIVE TO
CAME A,(B) ;A PROCESS #0 VALUE?
JRST SCHGSP ;NO -- SEARCH
MOVE B,1(B) ;YES -- GET VALUE CELL
POPJ P,
SCHGSP: SKIPN (B)
JRST UNPOPJ
MOVE D,GLOBSP+1 ;GET GLOBAL SP PTR
SCHG1: JUMPGE D,UNPOPJ ;IF NO MORE, LEAVE
CAMN B,1(D) ;ARE WE FOUND?
JRST GLOCFOUND ;YES
ADD D,[4,,4] ;NO -- TRY NEXT
JRST SCHG1
GLOCFOUND:
EXCH B,D ;SAVE ATOM PTR
ADD B,[2,,2] ;MAKE LOCATIVE
MOVEI 0,(D)
CAIL 0,HIBOT
POPJ P,
MOVEM A,(D) ;CLOBBER IT AWAY
MOVEM B,1(D)
POPJ P,
IIGLOC: PUSH TP,$TATOM
PUSH TP,B
PUSHJ P,IGLOC
MOVE C,(TP)
SUB TP,[2,,2]
GETYP 0,A
CAIE 0,TUNBOU
POPJ P,
PUSH TP,$TATOM
PUSH TP,C
MOVEI 0,(C)
MOVE B,C
CAIL 0,$TLOSE
PUSHJ P,IMPURI ; IMPURIFY THE POOR ATOM
PUSHJ P,BSETG ; MAKE A SLOT
SETOM 1(B) ; UNBOUNDIFY IT
MOVSI A,TLOCD
MOVSI 0,TUNBOU
MOVEM 0,(B)
SUB TP,[2,,2]
POPJ P,
;ILVAL RETURNS IN A AND B THE LOCAL VALUE OF THE IDENTIFIER PASSED TO IT IN A AND B
;IF THE IDENTIFIER IS UNBOUND ITS VALUE IS $TUNBOUND IN A AND 0 IN B. IF
;IT IS UNASSIGNED ITS VALUE IS $TUNBOUND IN A AND -1 IN B. CALL - PUSHJ P,IVAL
AILVAL:
PUSHJ P,AILOC ; USE SUPPLIED SP
JRST CHVAL
ILVAL:
PUSHJ P,ILOC ;GET LOCATIVE TO VALUE
CHVAL: CAMN A,$TUNBOUND ;BOUND
POPJ P, ;NO -- RETURN
MOVSI A,TLOCD ; GET GOOD TYPE
HRR A,2(B) ; SHOULD BE TIME OR 0
PUSH P,0
PUSHJ P,RMONC0 ; CHECK READ MONITOR
POP P,0
MOVE A,(B) ;GET THE TYPE OF THE VALUE
MOVE B,1(B) ;GET DATUM
POPJ P,
;IGVAL -- LIKE ILVAL EXCEPT FOR GLOBAL VALUES
IGVAL: PUSHJ P,IGLOC
JRST CHVAL
; COMPILERS INTERFACE TO LVAL/GVAL/SETG/SET
CILVAL: MOVE PVP,PVSTOR+1
MOVE 0,BINDID+1(PVP) ; CURRENT BIND
HRLI 0,TLOCI
CAME 0,(B) ; HURRAY FOR SPEED
JRST CILVA1 ; TOO BAD
MOVE C,1(B) ; POINTER
MOVE A,(C) ; VAL TYPE
TLNE A,.RDMON ; MONITORS?
JRST CILVA1
GETYP 0,A
CAIN 0,TUNBOU
JRST CUNAS ; COMPILER ERROR
MOVE B,1(C) ; GOT VAL
MOVE 0,SPCCHK
TRNN 0,1
POPJ P,
HLRZ 0,-2(C) ; SPECIAL CHECK
CAIE 0,TUBIND
POPJ P, ; RETURN
MOVE PVP,PVSTOR+1
CAMGE C,CURFCN+1(PVP)
JRST CUNAS
POPJ P,
CUNAS:
CILVA1: SUBM M,(P) ; FIX (P)
PUSH TP,$TATOM ; SAVE ATOM
PUSH TP,B
MCALL 1,LVAL ; GET ERROR/MONITOR
POPJM: SUBM M,(P) ; REPAIR DAMAGE
POPJ P,
; COMPILERS INTERFACE TO SET C/ ATOM A,B/ NEW VALUE
CISET: MOVE PVP,PVSTOR+1
MOVE 0,BINDID+1(PVP) ; CURRENT BINDING ENVIRONMENT
HRLI 0,TLOCI
CAME 0,(C) ; CAN WE WIN?
JRST CISET1 ; NO, MORE HAIR
MOVE D,1(C) ; POINT TO SLOT
CISET3: HLLZ 0,(D) ; MON CHECK
TLNE 0,.WRMON
JRST CISET4 ; YES, LOSE
TLZ 0,TYPMSK
IOR A,0 ; LEAVE MONITOR ON
MOVE 0,SPCCHK
TRNE 0,1
JRST CISET5 ; SPEC/UNSPEC CHECK
CISET6: MOVEM A,(D) ; STORE
MOVEM B,1(D)
POPJ P,
CISET5: HLRZ 0,-2(D)
CAIE 0,TUBIND
JRST CISET6
MOVE PVP,PVSTOR+1
CAMGE D,CURFCN+1(PVP)
JRST CISET4
JRST CISET6
CISET1: SUBM M,(P) ; FIX ADDR
PUSH TP,$TATOM ; SAVE ATOM
PUSH TP,C
PUSH TP,A
PUSH TP,B
MOVE B,C ; GET ATOM
PUSHJ P,ILOC ; SEARCH
MOVE D,B ; POSSIBLE POINTER
GETYP E,A
MOVE 0,A
MOVE A,-1(TP) ; VAL BACK
MOVE B,(TP)
CAIE E,TUNBOU ; SKIP IF WIN
JRST CISET2 ; GO CLOBBER IT IN
MCALL 2,SET
JRST POPJM
CISET2: MOVE C,-2(TP) ; ATOM BACK
SUBM M,(P) ; RESET (P)
SUB TP,[4,,4]
JRST CISET3
; HERE TO DO A MONITORED SET
CISET4: SUBM M,(P) ; AGAIN FIX (P)
PUSH TP,$TATOM
PUSH TP,C
PUSH TP,A
PUSH TP,B
MCALL 2,SET
JRST POPJM
; COMPILER LLOC
CLLOC: MOVE PVP,PVSTOR+1
MOVE 0,BINDID+1(PVP) ; GET CURRENT LOCATIVE
HRLI 0,TLOCI
CAME 0,(B) ; WIN?
JRST CLLOC1
MOVE B,1(B)
MOVE 0,SPCCHK
TRNE 0,1 ; SKIP IF NOT CHECKING
JRST CLLOC9
CLLOC3: MOVSI A,TLOCD
HRR A,2(B) ; GET BIND TIME
POPJ P,
CLLOC1: SUBM M,(P)
PUSH TP,$TATOM
PUSH TP,B
PUSHJ P,ILOC ; LOOK IT UP
JUMPE B,CLLOC2
SUB TP,[2,,2]
CLLOC4: SUBM M,(P)
JRST CLLOC3
CLLOC2: MCALL 1,LLOC
JRST CLLOC4
CLLOC9: HLRZ 0,-2(B)
CAIE 0,TUBIND
JRST CLLOC3
MOVE PVP,PVSTOR+1
CAMGE B,CURFCN+1(PVP)
JRST CLLOC2
JRST CLLOC3
; COMPILER BOUND?
CBOUND: SUBM M,(P)
PUSHJ P,ILOC
JUMPE B,PJFALS ; IF UNBOUND RET FALSE AND NO SSKIP
PJT1: SOS (P)
MOVSI A,TATOM
MOVE B,IMQUOTE T
JRST POPJM
PJFALS: MOVEI B,0
MOVSI A,TFALSE
JRST POPJM
; COMPILER ASSIGNED?
CASSQ: SUBM M,(P)
PUSHJ P,ILOC
JUMPE B,PJFALS
GETYP 0,(B)
CAIE 0,TUNBOU
JRST PJT1
JRST PJFALS
; COMPILER GVAL B/ ATOM
CIGVAL: MOVE 0,(B) ; GLOBAL VAL HERE?
CAME 0,$TLOCI ; TIME=0 ,TYPE=TLOCI => GLOB VAL
JRST CIGVA1 ; NO, GO LOOK
MOVE C,1(B) ; POINT TO SLOT
MOVE A,(C) ; GET TYPE
TLNE A,.RDMON
JRST CIGVA1
GETYP 0,A ; CHECK FOR UNBOUND
CAIN 0,TUNBOU ; SKIP IF WINNER
JRST CGUNAS
MOVE B,1(C)
POPJ P,
CGUNAS:
CIGVA1: SUBM M,(P)
PUSH TP,$TATOM
PUSH TP,B
.MCALL 1,GVAL ; GET ERROR/MONITOR
JRST POPJM
; COMPILER INTERFACET TO SETG
CSETG: MOVE 0,(C) ; GET V CELL
CAME 0,$TLOCI ; SKIP IF FAST
JRST CSETG1
HRRZ D,1(C) ; POINT TO SLOT
MOVE 0,(D) ; OLD VAL
CSETG3: CAIG D,HIBOT ; SKIP IF PURE ATOM
TLNE 0,.WRMON ; MONITOR
JRST CSETG2
MOVEM A,(D)
MOVEM B,1(D)
POPJ P,
CSETG1: SUBM M,(P) ; FIX UP P
PUSH TP,$TATOM
PUSH TP,C
PUSH TP,A
PUSH TP,B
MOVE B,C
PUSHJ P,IGLOC ; FIND GLOB LOCATIVE
GETYP E,A
MOVE 0,A
MOVEI D,(B) ; SETUP TO RESTORE NEW VAL
MOVE A,-1(TP)
MOVE B,(TP)
CAIE E,TUNBOU
JRST CSETG4
MCALL 2,SETG
JRST POPJM
CSETG4: MOVE C,-2(TP) ; ATOM BACK
SUBM M,(P) ; RESET (P)
SUB TP,[4,,4]
JRST CSETG3
CSETG2: SUBM M,(P)
PUSH TP,$TATOM ; CAUSE A SETG MONITOR
PUSH TP,C
PUSH TP,A
PUSH TP,B
MCALL 2,SETG
JRST POPJM
; COMPILER GLOC
CGLOC: MOVE 0,(B) ; GET CURRENT GUY
CAME 0,$TLOCI ; WIN?
JRST CGLOC1 ; NOPE
HRRZ D,1(B) ; POINT TO SLOT
CAILE D,HIBOT ; PURE?
JRST CGLOC1
MOVE A,$TLOCD
MOVE B,1(B)
POPJ P,
CGLOC1: SUBM M,(P)
PUSH TP,$TATOM
PUSH TP,B
MCALL 1,GLOC
JRST POPJM
; COMPILERS GASSIGNED?
CGASSQ: MOVE 0,(B)
SUBM M,(P)
CAMN 0,$TLOCD
JRST PJT1
PUSHJ P,IGLOC
JUMPE B,PJFALS
GETYP 0,(B)
CAIE 0,TUNBOU
JRST PJT1
JRST PJFALS
; COMPILERS GBOUND?
CGBOUN: MOVE 0,(B)
SUBM M,(P)
CAMN 0,$TLOCD
JRST PJT1
PUSHJ P,IGLOC
JUMPE B,PJFALS
JRST PJT1
IMFUNCTION REP,FSUBR,[REPEAT]
JRST PROG
MFUNCTION BIND,FSUBR
JRST PROG
IMFUNCTION PROG,FSUBR
ENTRY 1
GETYP A,(AB) ;GET ARG TYPE
CAIE A,TLIST ;IS IT A LIST?
JRST WRONGT ;WRONG TYPE
SKIPN C,1(AB) ;GET AND CHECK ARGUMENT
JRST TFA ;TOO FEW ARGS
SETZB E,D ; INIT HEWITT ATOM AND DECL
PUSHJ P,CARATC ; IS 1ST THING AN ATOM
JFCL
PUSHJ P,RSATY1 ; CDR AND GET TYPE
CAIE 0,TLIST ; MUST BE LIST
JRST MPD.13
MOVE B,1(C) ; GET ARG LIST
PUSH TP,$TLIST
PUSH TP,C
PUSHJ P,RSATYP
CAIE 0,TDECL
JRST NOP.DC ; JUMP IF NO DCL
MOVE D,1(C)
MOVEM C,(TP)
PUSHJ P,RSATYP ; CDR ON
NOP.DC: PUSH TP,$TLIST
PUSH TP,B ; AND ARG LIST
PUSHJ P,PRGBND ; BIND AUX VARS
HRRZ E,FSAV(TB)
CAIE E,BIND
SKIPA E,IMQUOTE LPROG,[LPROG ]INTRUP
JRST .+3
PUSHJ P,MAKACT ; MAKE ACTIVATION
PUSHJ P,PSHBND ; BIND AND CHECK
PUSHJ P,SPECBI ; NAD BIND IT
; HERE TO RUN PROGS FUNCTIONS ETC.
DOPROG: MOVEI A,REPROG
HRLI A,TDCLI ; FLAG AS FUNNY
MOVEM A,(TB) ; WHERE TO AGAIN TO
MOVE C,1(TB)
MOVEM C,3(TB) ; RESTART POINTER
JRST .+2 ; START BY SKIPPING DECL
DOPRG1: PUSHJ P,FASTEV
HRRZ C,@1(TB) ;GET THE REST OF THE BODY
DOPRG2: MOVEM C,1(TB)
JUMPN C,DOPRG1
ENDPROG:
HRRZ C,FSAV(TB)
CAIN C,REP
REPROG: SKIPN C,@3(TB)
JRST PFINIS
HRRZM C,1(TB)
INTGO
MOVE C,1(TB)
JRST DOPRG1
PFINIS: GETYP 0,(TB)
CAIE 0,TDCLI ; DECL'D ?
JRST PFINI1
HRRZ 0,(TB) ; SEE IF RSUBR
JUMPE 0,RSBVCK ; CHECK RSUBR VALUE
HRRZ C,3(TB) ; GET START OF FCN
GETYP 0,(C) ; CHECK FOR DECL
CAIE 0,TDECL
JRST PFINI1 ; NO, JUST RETURN
MOVE E,IMQUOTE VALUE
PUSHJ P,PSHBND ; BUILD FAKE BINDING
MOVE C,1(C) ; GET DECL LIST
MOVE E,TP
PUSHJ P,CHKDCL ; AND CHECK IT
MOVE A,-3(TP) ; GET VAL BAKC
MOVE B,-2(TP)
SUB TP,[6,,6]
PFINI1: HRRZ C,FSAV(TB)
CAIE C,EVAL
JRST FINIS
JRST EFINIS
RSATYP: HRRZ C,(C)
RSATY1: JUMPE C,TFA
GETYP 0,(C)
POPJ P,
; HERE TO CHECK RSUBR VALUE
RSBVCK: PUSH TP,A
PUSH TP,B
MOVE C,A
MOVE D,B
MOVE A,1(TB) ; GET DECL
MOVE B,1(A)
HLLZ A,(A)
PUSHJ P,TMATCH
JRST RSBVC1
POP TP,B
POP TP,A
POPJ P,
RSBVC1: MOVE C,1(TB)
POP TP,B
POP TP,D
MOVE A,IMQUOTE VALUE
JRST TYPMIS
MFUNCTION MRETUR,SUBR,[RETURN]
ENTRY
HLRE A,AB ; GET # OF ARGS
ASH A,-1 ; TO NUMBER
AOJL A,RET2 ; 2 OR MORE ARGS
PUSHJ P,PROGCH ;CHECK IN A PROG
PUSH TP,A
PUSH TP,B
MOVEI B,-1(TP) ; VERIFY IT
COMRET: PUSHJ P,CHFSWP
SKIPL C ; ARGS?
MOVEI C,0 ; REAL NONE
PUSHJ P,CHUNW
JUMPN A,CHFINI ; WINNER
MOVSI A,TATOM
MOVE B,IMQUOTE T
; SEE IF MUST CHECK RETURNS TYPE
CHFINI: GETYP 0,(TB) ; SPECIAL TYPE IF SO
CAIE 0,TDCLI
JRST FINIS ; NO, JUST FINIS
MOVEI 0,PFINIS ; CAUSE TO FALL INTO FUNCTION CODE
HRRM 0,PCSAV(TB)
JRST CONTIN
RET2: AOJL A,TMA
GETYP A,(AB)+2
CAIE A,TACT ; AS FOR "EXIT" SHOULD BE ACTIVATION
JRST WTYP2
MOVEI B,(AB)+2 ; ADDRESS OF FRAME POINTER
JRST COMRET
MFUNCTION AGAIN,SUBR
ENTRY
HLRZ A,AB ;GET # OF ARGS
CAIN A,-2 ;1 ARG?
JRST NLCLA ;YES
JUMPN A,TMA ;0 ARGS?
PUSHJ P,PROGCH ;CHECK FOR IN A PROG
PUSH TP,A
PUSH TP,B
JRST AGAD
NLCLA: GETYP A,(AB)
CAIE A,TACT
JRST WTYP1
PUSH TP,(AB)
PUSH TP,1(AB)
AGAD: MOVEI B,-1(TP) ; POINT TO FRAME
PUSHJ P,CHFSWP
HRRZ C,(B) ; GET RET POINT
GOJOIN: PUSH TP,$TFIX
PUSH TP,C
MOVEI C,-1(TP)
PUSHJ P,CHUNW ; RESTORE FRAME, UNWIND IF NEC.
HRRM B,PCSAV(TB)
HRRZ 0,FSAV(TB) ; CHECK FOR RSUBR
CAIGE 0,HIBOT
CAIGE 0,STOSTR
JRST CONTIN
HRRZ E,1(TB)
PUSH TP,$TFIX
PUSH TP,B
MOVEI C,-1(TP)
MOVEI B,(TB)
PUSHJ P,CHUNW1
MOVE TP,1(TB)
MOVE SP,SPSTOR+1
MOVEM SP,SPSAV(TB)
MOVEM TP,TPSAV(TB)
MOVE C,OTBSAV(TB) ; AND RESTORE P FROM FATHER
MOVE P,PSAV(C)
MOVEM P,PSAV(TB)
SKIPGE PCSAV(TB)
HRLI B,400000+M
MOVEM B,PCSAV(TB)
JRST CONTIN
MFUNCTION GO,SUBR
ENTRY 1
GETYP A,(AB)
CAIE A,TATOM
JRST NLCLGO
PUSHJ P,PROGCH ;CHECK FOR A PROG
PUSH TP,A ;SAVE
PUSH TP,B
MOVEI B,-1(TP)
PUSHJ P,CHFSWP
PUSH TP,$TATOM
PUSH TP,1(C)
PUSH TP,2(B)
PUSH TP,3(B)
MCALL 2,MEMQ ;DOES IT HAVE THIS TAG?
JUMPE B,NXTAG ;NO -- ERROR
FNDGO: EXCH B,(TP) ;SAVE PLACE TO GO
MOVSI D,TLIST
MOVEM D,-1(TP)
JRST GODON
NLCLGO: CAIE A,TTAG ;CHECK TYPE
JRST WTYP1
MOVE B,1(AB)
MOVEI B,2(B) ; POINT TO SLOT
PUSHJ P,CHFSWP
MOVE A,1(C)
GETYP 0,(A) ; SEE IF COMPILED
CAIE 0,TFIX
JRST GODON1
MOVE C,1(A)
JRST GOJOIN
GODON1: PUSH TP,(A) ;SAVE BODY
PUSH TP,1(A)
GODON: MOVEI C,0
PUSHJ P,CHUNW ;GO BACK TO CORRECT FRAME
MOVE B,(TP) ;RESTORE ITERATION MARKER
MOVEM B,1(TB)
MOVSI A,TATOM
MOVE B,1(B)
JRST CONTIN
MFUNCTION TAG,SUBR
ENTRY
JUMPGE AB,TFA
HLRZ 0,AB
GETYP A,(AB) ;GET TYPE OF ARGUMENT
CAIE A,TFIX ; FIX ==> COMPILED
JRST ATOTAG
CAIE 0,-4
JRST WNA
GETYP A,2(AB)
CAIE A,TACT
JRST WTYP2
PUSH TP,(AB)
PUSH TP,1(AB)
PUSH TP,2(AB)
PUSH TP,3(AB)
JRST GENTV
ATOTAG: CAIE A,TATOM ;CHECK THAT IT IS AN ATOM
JRST WTYP1
CAIE 0,-2
JRST TMA
PUSHJ P,PROGCH ;CHECK PROG
PUSH TP,A ;SAVE VAL
PUSH TP,B
PUSH TP,$TATOM
PUSH TP,1(AB)
PUSH TP,2(B)
PUSH TP,3(B)
MCALL 2,MEMQ
JUMPE B,NXTAG ;IF NOT FOUND -- ERROR
EXCH A,-1(TP) ;SAVE PLACE
EXCH B,(TP)
HRLI A,TFRAME
PUSH TP,A
PUSH TP,B
GENTV: MOVEI A,2
PUSHJ P,IEVECT
MOVSI A,TTAG
JRST FINIS
PROGCH: MOVE B,IMQUOTE LPROG,[LPROG ]INTRUP
PUSHJ P,ILVAL ;GET VALUE
GETYP 0,A
CAIE 0,TACT
JRST NXPRG
POPJ P,
; HERE TO UNASSIGN LPROG IF NEC
UNPROG: MOVE B,IMQUOTE LPROG,[LPROG ]INTRUP
PUSHJ P,ILVAL
GETYP 0,A
CAIE 0,TACT ; SKIP IF MUST UNBIND
JRST UNMAP
MOVSI A,TUNBOU
MOVNI B,1
MOVE E,IMQUOTE LPROG,[LPROG ]INTRUP
PUSHJ P,PSHBND
UNMAP: HRRZ 0,FSAV(TB) ; CHECK FOR FUNNY
CAIN 0,MAPPLY ; SKIP IF NOT
POPJ P,
MOVE B,IMQUOTE LMAP,[LMAP ]INTRUP
PUSHJ P,ILVAL
GETYP 0,A
CAIE 0,TFRAME
JRST UNSPEC
MOVSI A,TUNBOU
MOVNI B,1
MOVE E,IMQUOTE LMAP,[LMAP ]INTRUP
PUSHJ P,PSHBND
UNSPEC: PUSH TP,BNDV
MOVE B,PVSTOR+1
ADD B,[CURFCN,,CURFCN]
PUSH TP,B
PUSH TP,$TSP
MOVE E,SPSTOR+1
ADD E,[3,,3]
PUSH TP,E
POPJ P,
REPEAT 0,[
MFUNCTION MEXIT,SUBR,[EXIT]
ENTRY 2
GETYP A,(AB)
CAIE A,TACT
JRST WTYP1
MOVEI B,(AB)
PUSHJ P,CHFSWP
ADD C,[2,,2]
PUSHJ P,CHUNW ;RESTORE FRAME
JRST CHFINI ; CHECK FOR WINNING VALUE
]
MFUNCTION COND,FSUBR
ENTRY 1
GETYP A,(AB)
CAIE A,TLIST
JRST WRONGT
PUSH TP,(AB)
PUSH TP,1(AB) ;CREATE UNNAMED TEMP
MOVEI B,0 ; SET TO FALSE IN CASE
CLSLUP: SKIPN C,1(TB) ;IS THE CLAUSELIST NIL?
JRST IFALS1 ;YES -- RETURN NIL
GETYP A,(C) ;NO -- GET TYPE OF CAR
CAIE A,TLIST ;IS IT A LIST?
JRST BADCLS ;
MOVE A,1(C) ;YES -- GET CLAUSE
JUMPE A,BADCLS
GETYPF B,(A)
PUSH TP,B ; EVALUATION OF
HLLZS (TP)
PUSH TP,1(A) ;THE PREDICATE
JSP E,CHKARG
MCALL 1,EVAL
GETYP 0,A
CAIN 0,TFALSE
JRST NXTCLS ;FALSE TRY NEXT CLAUSE
MOVE C,1(TB) ;IF NOT, DO FIRST CLAUSE
MOVE C,1(C)
HRRZ C,(C)
JUMPE C,FINIS ;(UNLESS DONE WITH IT)
JRST DOPRG2 ;AS THOUGH IT WERE A PROG
NXTCLS: HRRZ C,@1(TB) ;SET THE CLAUSLIST
HRRZM C,1(TB) ;TO CDR OF THE CLAUSLIST
JRST CLSLUP
IFALSE:
MOVEI B,0
IFALS1: MOVSI A,TFALSE ;RETURN FALSE
JRST FINIS
MFUNCTION UNWIND,FSUBR
ENTRY 1
GETYP 0,(AB) ; CHECK THE ARGS FOR WINNAGE
SKIPN A,1(AB) ; NONE?
JRST TFA
HRRZ B,(A) ; CHECK FOR 2D
JUMPE B,TFA
HRRZ 0,(B) ; 3D?
JUMPN 0,TMA
; Unbind LPROG and LMAPF so that nothing cute happens
PUSHJ P,UNPROG
; Push thing to do upon UNWINDing
PUSH TP,$TLIST
PUSH TP,[0]
MOVEI C,UNWIN1
PUSHJ P,IUNWIN ; GOT TO INTERNAL SET UP
; Now EVAL the first form
MOVE A,1(AB)
HRRZ 0,(A) ; SAVE POINTER TO OTHER GUY
MOVEM 0,-12(TP)
MOVE B,1(A)
GETYP A,(A)
MOVSI A,(A)
JSP E,CHKAB ; DEFER?
PUSH TP,A
PUSH TP,B
MCALL 1,EVAL ; EVAL THE LOSER
JRST FINIS
; Now push slots to hold undo info on the way down
IUNWIN: JUMPE M,NOUNRE
HLRE 0,M ; CHECK BOUNDS
SUBM M,0
ANDI 0,-1
CAIL C,(M)
CAML C,0
JRST .+2
SUBI C,(M)
NOUNRE: PUSH TP,$TTB ; DESTINATION FRAME
PUSH TP,[0]
PUSH TP,[0] ; ARGS TO WHOEVER IS DOING IT
PUSH TP,[0]
; Now bind UNWIND word
PUSH TP,$TUNWIN ; FIRST WORD OF IT
MOVE SP,SPSTOR+1
HRRM SP,(TP) ; CHAIN
MOVEM TP,SPSTOR+1
PUSH TP,TB ; AND POINT TO HERE
PUSH TP,$TTP
PUSH TP,[0]
HRLI C,TPDL
PUSH TP,C
PUSH TP,P ; SAVE PDL ALSO
MOVEM TP,-2(TP) ; SAVE FOR LATER
POPJ P,
; Do a non-local return with UNWIND checking
CHUNW: HRRZ E,SPSAV(B) ; GET DESTINATION FRAME
CHUNW1: PUSH TP,(C) ; FINAL VAL
PUSH TP,1(C)
JUMPN C,.+3 ; WAS THERE REALLY ANYTHING
SETZM (TP)
SETZM -1(TP)
PUSHJ P,STLOOP ; UNBIND
CHUNPC: SKIPA ; WILL NOT SKIP UNLESS UNWIND FOUND
JRST GOTUND
MOVEI A,(TP)
SUBI A,(SP)
MOVSI A,(A)
HLL SP,TP
SUB SP,A
MOVEM SP,SPSTOR+1
HRRI TB,(B) ; UPDATE TB
PUSHJ P,UNWFRMS
POP TP,B
POP TP,A
POPJ P,
POPUNW: MOVE SP,SPSTOR+1
HRRZ SP,(SP)
MOVEI E,(TP)
SUBI E,(SP)
MOVSI E,(E)
HLL SP,TP
SUB SP,E
MOVEM SP,SPSTOR+1
POPJ P,
UNWFRM: JUMPE FRM,CPOPJ
MOVE B,FRM
UNWFR2: JUMPE B,UNWFR1
CAMG B,TPSAV(TB)
JRST UNWFR1
MOVE B,(B)
JRST UNWFR2
UNWFR1: MOVE FRM,B
POPJ P,
; Here if an UNDO found
GOTUND: MOVE TB,1(SP) ; GET FRAME OF UNDO
MOVE A,-1(TP) ; GET FUNNY ARG FOR PASS ON
MOVE C,(TP)
MOVE TP,3(SP) ; GET FUTURE TP
MOVEM C,-6(TP) ; SAVE ARG
MOVEM A,-7(TP)
MOVE C,(TP) ; SAVED P
SUB C,[1,,1]
MOVEM C,PSAV(TB) ; MAKE CONTIN WIN
MOVEM TP,TPSAV(TB)
MOVEM SP,SPSAV(TB)
HRRZ C,(P) ; PC OF CHUNW CALLER
HRRM C,-11(TP) ; SAVE ALSO AND GET WHERE TO GO PC
MOVEM B,-10(TP) ; AND DESTINATION FRAME
HRRZ C,-1(TP) ; WHERE TO UNWIND PC
HRRZ 0,FSAV(TB) ; RSUBR?
CAIGE 0,HIBOT
CAIGE 0,STOSTR
JRST .+3
SKIPGE PCSAV(TB)
HRLI C,400000+M
MOVEM C,PCSAV(TB)
JRST CONTIN
UNWIN1: MOVE B,-12(TP) ; POINT TO THING TO DO UNWINDING
GETYP A,(B)
MOVSI A,(A)
MOVE B,1(B)
JSP E,CHKAB
PUSH TP,A
PUSH TP,B
MCALL 1,EVAL
UNWIN2: MOVEI C,-7(TP) ; POINT TO SAVED RET VALS
MOVE B,-10(TP)
HRRZ E,-11(TP)
PUSH P,E
MOVE SP,SPSTOR+1
HRRZ SP,(SP) ; UNBIND THIS GUY
MOVEI E,(TP) ; AND FIXUP SP
SUBI E,(SP)
MOVSI E,(E)
HLL SP,TP
SUB SP,E
MOVEM SP,SPSTOR+1
JRST CHUNW ; ANY MORE TO UNWIND?
; CHFSWP - CHECK FRAMES VALIDITY AND SWAP PROCESS IF NECESSARY.
; CALLED BY ALL CONTROL FLOW
; ROUTINES (GO,RETURN,EXIT,AGAIN,ERRET...)
CHFSWP: PUSHJ P,CHFRM ; CHECK FOR VALID FRAME
HRRZ D,(B) ; PROCESS VECTOR DOPE WD
HLRZ C,(D) ; LENGTH
SUBI D,-1(C) ; POINT TO TOP
MOVNS C ; NEGATE COUNT
HRLI D,2(C) ; BUILD PVP
MOVE E,PVSTOR+1
MOVE C,AB
MOVE A,(B) ; GET FRAME
MOVE B,1(B)
CAMN E,D ; SKIP IF SWAP NEEDED
POPJ P,
PUSH TP,A ; SAVE FRAME
PUSH TP,B
MOVE B,D
PUSHJ P,PROCHK ; FIX UP PROCESS LISTS
MOVE A,PSTAT+1(B) ; GET STATE
CAIE A,RESMBL
JRST NOTRES
MOVE D,B ; PREPARE TO SWAP
POP P,0 ; RET ADDR
POP TP,B
POP TP,A
JSP C,SWAP ; SWAP IN
MOVE C,ABSTO+1(E) ; GET OLD ARRGS
MOVEI A,RUNING ; FIX STATES
MOVE PVP,PVSTOR+1
MOVEM A,PSTAT+1(PVP)
MOVEI A,RESMBL
MOVEM A,PSTAT+1(E)
JRST @0
NOTRES: ERRUUO EQUOTE PROCESS-NOT-RESUMABLE
;SETG IS USED TO SET THE GLOBAL VALUE OF ITS FIRST ARGUMENT,
;AN IDENTIFIER, TO THE VALUE OF ITS SECOND ARGUMENT. ITS VALUE IS
; ITS SECOND ARGUMENT.
IMFUNCTION SETG,SUBR
ENTRY 2
GETYP A,(AB) ;GET TYPE OF FIRST ARGUMENT
CAIE A,TATOM ;CHECK THAT IT IS AN ATOM
JRST NONATM ;IF NOT -- ERROR
MOVE B,1(AB) ;GET POINTER TO ATOM
PUSH TP,$TATOM
PUSH TP,B
MOVEI 0,(B)
CAIL 0,HIBOT ; PURE ATOM?
PUSHJ P,IMPURIFY ; YES IMPURIFY
PUSHJ P,IGLOC ;GET LOCATIVE TO VALUE
CAMN A,$TUNBOUND ;IF BOUND
PUSHJ P,BSETG ;IF NOT -- BIND IT
MOVE C,2(AB) ; GET PROPOSED VVAL
MOVE D,3(AB)
MOVSI A,TLOCD ; MAKE SURE MONCH WINS
PUSHJ P,MONCH0 ; WOULD YOU BELIEVE MONITORS!!!!
EXCH D,B ;SAVE PTR
MOVE A,C
HRRZ E,-2(D) ; POINT TO POSSIBLE GDECL (OR MAINIFEST)
JUMPE E,OKSETG ; NONE ,OK
CAIE E,-1 ; MANIFEST?
JRST SETGTY
GETYP 0,(D) ; IF UNBOUND, LET IT HAPPEN
SKIPN IGDECL
CAIN 0,TUNBOU
JRST OKSETG
MANILO: GETYP C,(D)
GETYP 0,2(AB)
CAIN 0,(C)
CAME B,1(D)
JRST .+2
JRST OKSETG
PUSH TP,$TVEC
PUSH TP,D
MOVE B,IMQUOTE REDEFINE
PUSHJ P,ILVAL ; SEE IF REDEFINE OK
GETYP A,A
CAIE A,TUNBOU
CAIN A,TFALSE
JRST .+2
JRST OKSTG
PUSH TP,$TATOM
PUSH TP,EQUOTE ATTEMPT-TO-CHANGE-MANIFEST-VARIABLE
PUSH TP,$TATOM
PUSH TP,1(AB)
MOVEI A,2
JRST CALER
SETGTY: PUSH TP,$TVEC
PUSH TP,D
MOVE C,A
MOVE D,B
GETYP A,(E)
MOVSI A,(A)
MOVE B,1(E)
JSP E,CHKAB
PUSHJ P,TMATCH
JRST TYPMI3
OKSTG: MOVE D,(TP)
MOVE A,2(AB)
MOVE B,3(AB)
OKSETG: MOVEM A,(D) ;DEPOSIT INTO THE
MOVEM B,1(D) ;INDICATED VALUE CELL
JRST FINIS
TYPMI3: MOVE C,(TP)
HRRZ C,-2(C)
MOVE D,2(AB)
MOVE B,3(AB)
MOVE 0,(AB)
MOVE A,1(AB)
JRST TYPMIS
BSETG: HRRZ A,GLOBASE+1
HRRZ B,GLOBSP+1
SUB B,A
CAIL B,6
JRST SETGIT
MOVEI B,0 ; MAKE SURE OF NO EMPTY SLOTS
PUSHJ P,IGLOC
CAMN A,$TUNBOU ; SKIP IF SLOT FOUND
JRST BSETG1
MOVE C,(TP) ; GET ATOM
MOVEM C,-1(B) ; CLOBBER ATOM SLOT
HLLZS -2(B) ; CLOBBER OLD DECL
JRST BSETGX
; BSETG1: PUSH TP,GLOBASE ; MUST REALLY GROW STACK
; PUSH TP,GLOBASE+1
; PUSH TP,$TFIX
; PUSH TP,[0]
; PUSH TP,$TFIX
; PUSH TP,[100]
; MCALL 3,GROW
BSETG1: PUSH P,0
PUSH P,C
MOVE C,GLOBASE+1
HLRE B,C
SUB C,B
MOVE B,GVLINC ; GROW BY INDICATED GVAL SLOTS
DPB B,[001100,,(C)]
; MOVEM A,GLOBASE
MOVE C,[6,,4] ; INDICATOR FOR AGC
PUSHJ P,AGC
MOVE B,GLOBASE+1
MOVE 0,GVLINC ; ADJUST GLOBAL SPBASE
ASH 0,6
SUB B,0
HRLZS 0
SUB B,0
MOVEM B,GLOBASE+1
; MOVEM B,GLOBASE+1
POP P,0
POP P,C
SETGIT:
MOVE B,GLOBSP+1
SUB B,[4,,4]
MOVSI C,TGATOM
MOVEM C,(B)
MOVE C,(TP)
MOVEM C,1(B)
MOVEM B,GLOBSP+1
ADD B,[2,,2]
BSETGX: MOVSI A,TLOCI
PUSHJ P,PATSCH ; FIXUP SCHLPAGE
MOVEM A,(C)
MOVEM B,1(C)
POPJ P,
PATSCH: GETYP 0,(C)
CAIN 0,TLOCI
SKIPL D,1(C)
POPJ P,
PATL: SKIPL E,3(D) ; SKIP IF NEXT EXISTS
JRST PATL1
MOVE D,E
JRST PATL
PATL1: MOVEI E,1
MOVEM E,3(D) ; SAY GVAL ETC. EXISTS IF WE UNBIND
POPJ P,
IMFUNCTION DEFMAC,FSUBR
ENTRY 1
PUSH P,.
JRST DFNE2
IMFUNCTION DFNE,FSUBR,[DEFINE]
ENTRY 1
PUSH P,[0]
DFNE2: GETYP A,(AB)
CAIE A,TLIST
JRST WRONGT
SKIPN B,1(AB) ; GET ATOM
JRST TFA
GETYP A,(B) ; MAKE SURE ATOM
MOVSI A,(A)
PUSH TP,A
PUSH TP,1(B)
JSP E,CHKARG
MCALL 1,EVAL ; EVAL IT TO AN ATOM
CAME A,$TATOM
JRST NONATM
PUSH TP,A ; SAVE TWO COPIES
PUSH TP,B
PUSHJ P,IGVAL ; SEE IF A VALUE EXISTS
CAMN A,$TUNBOU ; SKIP IF A WINNER
JRST .+3
PUSHJ P,ASKUSR ; CHECK WITH USER
JRST DFNE1
PUSH TP,$TATOM
PUSH TP,-1(TP)
MOVE B,1(AB)
HRRZ B,(B)
MOVSI A,TEXPR
SKIPN (P) ; SKIP IF MACRO
JRST DFNE3
MOVEI D,(B) ; READY TO CONS
MOVSI C,TEXPR
PUSHJ P,INCONS
MOVSI A,TMACRO
DFNE3: PUSH TP,A
PUSH TP,B
MCALL 2,SETG
DFNE1: POP TP,B ; RETURN ATOM
POP TP,A
JRST FINIS
ASKUSR: MOVE B,IMQUOTE REDEFINE
PUSHJ P,ILVAL ; SEE IF REDEFINE OK
GETYP A,A
CAIE A,TUNBOU
CAIN A,TFALSE
JRST ASKUS1
JRST ASKUS2
ASKUS1: PUSH TP,$TATOM
PUSH TP,-1(TP)
PUSH TP,$TATOM
PUSH TP,EQUOTE ALREADY-DEFINED-ERRET-NON-FALSE-TO-REDEFINE
MCALL 2,ERROR
GETYP 0,A
CAIE 0,TFALSE
ASKUS2: AOS (P)
MOVE B,1(AB)
POPJ P,
;SET CLOBBERS THE LOCAL VALUE OF THE IDENTIFIER GIVEN BY ITS
;FIRST ARGUMENT TO THE SECOND ARG. ITS VALUE IS ITS SECOND ARGUMENT.
IMFUNCTION SET,SUBR
HLRE D,AB ; 2 TIMES # OF ARGS TO D
ASH D,-1 ; - # OF ARGS
ADDI D,2
JUMPG D,TFA ; NOT ENOUGH
MOVE B,PVSTOR+1
MOVE C,SPSTOR+1
JUMPE D,SET1 ; NO ENVIRONMENT
AOJL D,TMA ; TOO MANY
GETYP A,4(AB) ; CHECK ARG IS A FRAME OR PROCESS
CAIE A,TFRAME
CAIN A,TENV
JRST SET2 ; WINNING ENVIRONMENT/FRAME
CAIN A,TACT
JRST SET2 ; TO MAKE PFISTER HAPPY
CAIE A,TPVP
JRST WTYP2
MOVE B,5(AB) ; GET PROCESS
MOVE C,SPSTO+1(B)
JRST SET1
SET2: MOVEI B,4(AB) ; POINT TO FRAME
PUSHJ P,CHFRM ; CHECK IT OUT
MOVE B,5(AB) ; GET IT BACK
MOVE C,SPSAV(B) ; GET BINDING POINTER
HRRZ B,4(AB) ; POINT TO PROCESS
HLRZ A,(B) ; GET LENGTH
SUBI B,-1(A) ; POINT TO START THEREOF
HLL B,PVSTOR+1 ; GET -LNTRH, (ALL PROCESS VECS SAME LENGTH)
SET1: PUSH TP,$TPVP ; SAVE PROCESS
PUSH TP,B
PUSH TP,$TSP ; SAVE PATH POINTER
PUSH TP,C
GETYP A,(AB) ;GET TYPE OF FIRST
CAIE A,TATOM ;ARGUMENT --
JRST WTYP1 ;BETTER BE AN ATOM
MOVE B,1(AB) ;GET PTR TO IT
MOVEI 0,(B)
CAIL 0,HIBOT
PUSHJ P,IMPURIFY
MOVE C,(TP)
PUSHJ P,AILOC ;GET LOCATIVE TO VALUE
GOTLOC: CAMN A,$TUNBOUND ;BOUND?
PUSHJ P, BSET ;BIND IT
MOVE C,2(AB) ; GET NEW VAL
MOVE D,3(AB)
MOVSI A,TLOCD ; FOR MONCH
HRR A,2(B)
PUSHJ P,MONCH0 ; HURRAY FOR MONITORS!!!!!
MOVE E,B
HLRZ A,2(E) ; GET DECLS
JUMPE A,SET3 ; NONE, GO
PUSH TP,$TSP
PUSH TP,E
MOVE B,1(A)
HLLZ A,(A) ; GET PATTERN
PUSHJ P,TMATCH ; MATCH TMEM
JRST TYPMI2 ; LOSES
MOVE E,(TP)
SUB TP,[2,,2]
MOVE C,2(AB)
MOVE D,3(AB)
SET3: MOVEM C,(E) ;CLOBBER IDENTIFIER
MOVEM D,1(E)
MOVE A,C
MOVE B,D
MOVE C,-2(TP) ; GET PROC
HRRZ C,BINDID+1(C)
HRLI C,TLOCI
; HERE WE NOTE THAT EFFICIENCY CAN SOMETIMES GET IN THE WAY OF CORRECTNESS
; BY SETTING THE SHALLOW BINDING WE MANAGE TO CLOBBER THE TOP LEVEL LVAL
; EVEN IF WE ARE SETTING WITH RESPECT TO A DIFFERENT FRAME. TO CORRECT
; THIS GLITCH THIS ACTIVITY WILL ONLY TAKE PLACE IF THE ATOM ALREADY POINTS
; TO A BINDING
MOVE D,1(AB)
SKIPE (D)
JRST NSHALL
MOVEM C,(D)
MOVEM E,1(D)
NSHALL: SUB TP,[4,,4]
JRST FINIS
BSET:
MOVE PVP,PVSTOR+1
CAMN PVP,-2(TP) ; SKIP IF PROC DIFFERS
MOVEM C,-2(TP) ; ELSE USE RESULT FROM LOC SEARCH
MOVE B,-2(TP) ; GET PROCESS
HRRZ A,TPBASE+1(B) ;GET ACTUAL STACK BASE
HRRZ B,SPBASE+1(B) ;AND FIRST BINDING
SUB B,A ;ARE THERE 6
CAIL B,6 ;CELLS AVAILABLE?
JRST SETIT ;YES
MOVE C,(TP) ; GET POINTER BACK
MOVEI B,0 ; LOOK FOR EMPTY SLOT
PUSHJ P,AILOC
CAMN A,$TUNBOUND ; SKIP IF FOUND
JRST BSET1
MOVE E,1(AB) ; GET ATOM
MOVEM E,-1(B) ; AND STORE
JRST BSET2
BSET1: MOVE B,-2(TP) ; GET PROCESS
; PUSH TP,TPBASE(B) ;NO -- GROW THE TP
; PUSH TP,TPBASE+1(B) ;AT THE BASE END
; PUSH TP,$TFIX
; PUSH TP,[0]
; PUSH TP,$TFIX
; PUSH TP,[100]
; MCALL 3,GROW
; MOVE C,-2(TP) ; GET PROCESS
; MOVEM A,TPBASE(C) ;SAVE RESULT
PUSH P,0 ; MANUALLY GROW VECTOR
PUSH P,C
MOVE C,TPBASE+1(B)
HLRE B,C
SUB C,B
MOVEI C,1(C)
CAME C,TPGROW
ADDI C,PDLBUF
MOVE D,LVLINC
DPB D,[001100,,-1(C)]
MOVE C,[5,,3] ; SET UP INDICATORS FOR AGC
PUSHJ P,AGC
MOVE PVP,PVSTOR+1
MOVE B,TPBASE+1(PVP) ; MODIFY POINTER
MOVE 0,LVLINC ; ADJUST SPBASE POINTER
ASH 0,6
SUB B,0
HRLZS 0
SUB B,0
MOVEM B,TPBASE+1(PVP)
POP P,C
POP P,0
; MOVEM B,TPBASE+1(C)
SETIT: MOVE C,-2(TP) ; GET PROCESS
MOVE B,SPBASE+1(C)
MOVEI A,-6(B) ;MAKE UP BINDING
HRRM A,(B) ;LINK PREVIOUS BIND BLOCK
MOVSI A,TBIND
MOVEM A,-6(B)
MOVE A,1(AB)
MOVEM A,-5(B)
SUB B,[6,,6]
MOVEM B,SPBASE+1(C)
ADD B,[2,,2]
BSET2: MOVE C,-2(TP) ; GET PROC
MOVSI A,TLOCI
HRR A,BINDID+1(C)
HLRZ D,OTBSAV(TB) ; TIME IT
MOVEM D,2(B) ; AND FIX IT
POPJ P,
; HERE TO ELABORATE ON TYPE MISMATCH
TYPMI2: MOVE C,(TP) ; FIND DECLS
HLRZ C,2(C)
MOVE D,2(AB)
MOVE B,3(AB)
MOVE 0,(AB) ; GET ATOM
MOVE A,1(AB)
JRST TYPMIS
MFUNCTION NOT,SUBR
ENTRY 1
GETYP A,(AB) ; GET TYPE
CAIE A,TFALSE ;IS IT FALSE?
JRST IFALSE ;NO -- RETURN FALSE
TRUTH:
MOVSI A,TATOM ;RETURN T (VERITAS)
MOVE B,IMQUOTE T
JRST FINIS
IMFUNCTION OR,FSUBR
PUSH P,[0]
JRST ANDOR
MFUNCTION ANDA,FSUBR,AND
PUSH P,[1]
ANDOR: ENTRY 1
GETYP A,(AB)
CAIE A,TLIST
JRST WRONGT ;IF ARG DOESN'T CHECK OUT
MOVE E,(P)
SKIPN C,1(AB) ;IF NIL
JRST TF(E) ;RETURN TRUTH
PUSH TP,$TLIST ;CREATE UNNAMED TEMP
PUSH TP,C
ANDLP:
MOVE E,(P)
JUMPE C,TFI(E) ;ANY MORE ARGS?
MOVEM C,1(TB) ;STORE CRUFT
GETYP A,(C)
MOVSI A,(A)
PUSH TP,A
PUSH TP,1(C) ;ARGUMENT
JSP E,CHKARG
MCALL 1,EVAL
GETYP 0,A
MOVE E,(P)
XCT TFSKP(E)
JRST FINIS ;IF FALSE -- RETURN
HRRZ C,@1(TB) ;GET CDR OF ARGLIST
JRST ANDLP
TF: JRST IFALSE
JRST TRUTH
TFI: JRST IFALS1
JRST FINIS
TFSKP: CAIE 0,TFALSE
CAIN 0,TFALSE
IMFUNCTION FUNCTION,FSUBR
ENTRY 1
MOVSI A,TEXPR
MOVE B,1(AB)
JRST FINIS
;SUBR VERSIONS OF AND/OR
MFUNCTION ANDP,SUBR,[AND?]
JUMPGE AB,TRUTH
MOVE C,[CAIN 0,TFALSE]
JRST BOOL
MFUNCTION ORP,SUBR,[OR?]
JUMPGE AB,IFALSE
MOVE C,[CAIE 0,TFALSE]
BOOL: HLRE A,AB ; GET ARG COUNTER
MOVMS A
ASH A,-1 ; DIVIDES BY 2
MOVE D,AB
PUSHJ P,CBOOL
JRST FINIS
CANDP: SKIPA C,[CAIN 0,TFALSE]
CORP: MOVE C,[CAIE 0,TFALSE]
JUMPE A,CNOARG
MOVEI D,(A)
ASH D,1 ; TIMES 2
HRLI D,(D)
SUBB TP,D ; POINT TO ARGS & FIXUP TP PTR
AOBJP D,.+1 ; FIXUP ARG PTR AND FALL INTO CBOOL
CBOOL: GETYP 0,(D)
XCT C ; WINNER ?
JRST CBOOL1 ; YES RETURN IT
ADD D,[2,,2]
SOJG A,CBOOL ; ANY MORE ?
SUB D,[2,,2] ; NO, USE LAST
CBOOL1: MOVE A,(D)
MOVE B,(D)+1
POPJ P,
CNOARG: MOVSI 0,TFALSE
XCT C
JRST CNOAND
MOVSI A,TFALSE
MOVEI B,0
POPJ P,
CNOAND: MOVSI A,TATOM
MOVE B,IMQUOTE T
POPJ P,
MFUNCTION CLOSURE,SUBR
ENTRY
SKIPL A,AB ;ANY ARGS
JRST TFA ;NO -- LOSE
ADD A,[2,,2] ;POINT AT IDS
PUSH TP,$TAB
PUSH TP,A
PUSH P,[0] ;MAKE COUNTER
CLOLP: SKIPL A,1(TB) ;ANY MORE IDS?
JRST CLODON ;NO -- LOSE
PUSH TP,(A) ;SAVE ID
PUSH TP,1(A)
PUSH TP,(A) ;GET ITS VALUE
PUSH TP,1(A)
ADD A,[2,,2] ;BUMP POINTER
MOVEM A,1(TB)
AOS (P)
MCALL 1,VALUE
PUSH TP,A
PUSH TP,B
MCALL 2,LIST ;MAKE PAIR
PUSH TP,A
PUSH TP,B
JRST CLOLP
CLODON: POP P,A
ACALL A,LIST ;MAKE UP LIST
PUSH TP,(AB) ;GET FUNCTION
PUSH TP,1(AB)
PUSH TP,A
PUSH TP,B
MCALL 2,LIST ;MAKE LIST
MOVSI A,TFUNARG
JRST FINIS
;ERROR COMMENTS FOR EVAL
BADNUM: ERRUUO EQUOTE NEGATIVE-ARGUMENT
WTY1TP: ERRUUO EQUOTE FIRST-ARG-WRONG-TYPE
UNBOU: PUSH TP,$TATOM
PUSH TP,EQUOTE UNBOUND-VARIABLE
JRST ER1ARG
UNAS: PUSH TP,$TATOM
PUSH TP,EQUOTE UNASSIGNED-VARIABLE
JRST ER1ARG
BADENV:
ERRUUO EQUOTE BAD-ENVIRONMENT
FUNERR:
ERRUUO EQUOTE BAD-FUNARG
MPD.0:
MPD.1:
MPD.2:
MPD.3:
MPD.4:
MPD.5:
MPD.6:
MPD.7:
MPD.8:
MPD.9:
MPD.10:
MPD.11:
MPD.12:
MPD.13:
MPD: ERRUUO EQUOTE MEANINGLESS-PARAMETER-DECLARATION
NOBODY: ERRUUO EQUOTE HAS-EMPTY-BODY
BADCLS: ERRUUO EQUOTE BAD-CLAUSE
NXTAG: ERRUUO EQUOTE NON-EXISTENT-TAG
NXPRG: ERRUUO EQUOTE NOT-IN-PROG
NAPTL:
NAPT: ERRUUO EQUOTE NON-APPLICABLE-TYPE
NONEVT: ERRUUO EQUOTE NON-EVALUATEABLE-TYPE
NONATM: ERRUUO EQUOTE NON-ATOMIC-ARGUMENT
ILLFRA: ERRUUO EQUOTE FRAME-NO-LONGER-EXISTS
ILLSEG: ERRUUO EQUOTE ILLEGAL-SEGMENT
BADMAC: ERRUUO EQUOTE BAD-USE-OF-MACRO
BADFSB: ERRUUO EQUOTE APPLY-OR-STACKFORM-OF-FSUBR
ER1ARG: PUSH TP,(AB)
PUSH TP,1(AB)
MOVEI A,2
JRST CALER
END
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