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decuslib20-03
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decus/20-0078/comp/o2.mac
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SALL
;AUTHOR: ELISABETH $LUND
;VERSION: 4 [2,43,106,271]
;PURPOSE: HANDLE I/O TRANSMISSIONS
;CONTENTS:
;SUBROUTINES: O2IS, O2IV,O2DF, O2AF, O2CF
SEARCH SIMMC2,SIMMAC
CTITLE O2
DEFINE IOER(F)=<
L X1,[ASCIZ/F/]
>
MACINIT
EXTERN YDCSTP,YBHIC1,YBHDF1,YMAXID,YO2STS
EXTERN YELIC1
EXTERN YBHIC2,YQREL,YTENT,YNOREL,YLXIAC,YFXCH,YFXTAB,YDCSTO
edit(43)
EXTERN YO2CIQ ;[43] CURRENT IQ BUFFER POINTER
EXTERN YO2IQB ;LOCAL BUFFER INTERNAL REQUEST NO 1
EXTERN YO2IQI ;INDEX YO2IQB OR YO2ITB[43]
EXTERN YO2LAS ; SAVES TENTATIVE FIXUP DEFINITION
EXTERN YO2LIT ;NUMBER OF LITERALS FOLLOWING SYMBOL IN IC1
EXTERN YO2FIX ;0/1 NO OUTPUT/OUTPUT OF OLD REQUEST
IFN QDEBUG,<
EXTERN YO2NOR ;RELOC COUNTERS SIXBIT CODE FOR DEBUG EDIT
>
EXTERN O2IC2P ;[43] OUTPUTS PARTLY FILLED CODE STREAM BUFFERS
EXTERN O2IC2Z ;[43] ZEROES THE REST OF THE IC2 BUFFER
EXTERN O2IC2 ; OUTPUTS BUFFER TO IC2
EXTERN YO2ITB ;[43] LOCAL BUFFER INTERNAL REQUESTS NO 2
IFN QDEBUG,<EXTERN O2DB1, O2DB2, O2DB3, O2DB4>
EXTERN O2ERO,O2ERL,O2ERU,O2ERR,O2ERI
EXTERN M2CO
INTERN O2IS, O2IV, O2DF, O2AF, O2CF, O2DFOU, O2DFTE
TWOSEG
RELOC 400000
SUBTTLE O2D1
;PURPOSE: READ A SECTION OF THE FILE DF1 INTO DECLARATION STACK
;ENTRY: O2D1
;NORMAL EXIT: RETURN
;ERROR EXIT:
IO.EOF=1B22
X=0
DEFINE SYMBTAB (A,B,C,DUM)
<REPEAT B-X-1,<Z>
X==B
IFB <C>,<0>
IFNB <C>,<C>>
REPEAT 0,<O2D1:
SAVE <X2,X3,X4,X5>
LI X5,0 ;COUNT OF DECLARED ZQU
L X3,YDCSTP ;STACKPOINTER
HRL X3,X3
SUB X3,YDCSTO
MOVSS X3,X3
EXEC O2DTYPE ;GET POINTER TO RECORD IN X4
ASSERT<WHEN (X4,ZQU) ;FIRST RECORD MUST NOT BE ZQU
RFAIL ZQU NOT EXP IN O2D1
>
IF WHENNOT (X4,ZHE) ;SKIP NEXT INSTR IF ZHE
GOTO FALSE
THEN EXEC O2DPUSH,<[ZHE%S]> ;READ ZHERECORD INTO STACK
ELSE EXEC O2DPUSH,<[ZHB%S]> ;READ RECORD ZHB INTO STACK
FI
O2DL: EXEC O2DTYPE ;GET POINTER TO RECORD IN X4
WHENNOT (X4,ZQU) ;SKIP NEXT INSTR IF ZQU
GOTO O2DL3
EXEC O2DPUSH,<[ZQU%S]> ;READ RECORD INTO STACK
IF IFEQF (X4,ZQUKND,QCLASS) ;SKIP NEXT INSTR IF NOT CLASS
GOTO FALSE
THEN IFNEQF (X4,ZQUKND,QPROCEDURE)
GOTO O2DL ;JUMP IF PROCEDURE
IFEQF (X4,ZQUTYP,QLABEL)
GOTO O2DL
FI IFEQF (X4,ZQUMOD,QDECLARED) ;IF NOT DECLARED SKIP NEXT INSTR
ADDI X5,1 ;UPDATE COUNTER
GOTO O2DL
O2DL3: JUMPE X5,O2DEND
SUBI X5,1
ASSERT <
WHEN (X4,ZHE) ;ZHERECORD NOT ALLOWED
RFAIL ZHERECORD IN MIDDLE OF SEGMENT>
EXEC O2DPUSH,<[ZHB%S]>
GOTO O2DL
O2DEND: ADDI X3,1 ;NO STACKPOINTER
HRRM X3,YDCSTP
SETZM (X3) ; THIS STOPS THE SCAN IN CARL
RETURN
O2DPUSH: PROC <A> ;ROUTINE TO READ RECORD FROM DF1
HRRZ X3,X3 ; RESET PDL COUNTER
CAML X3,YDCSTO
EXEC M2CO
L X2,A ;INTO DECLARATION STACK
LI X1,0
O2DL5:
LOOP SOSGE YBHDF1+2 ;SKIP NEXT INSTR IF MORE WORD IN BUFFER
GOTO O2DIN1
AS ILDB X0,YBHDF1+1 ;GET WORD
PUSH X3,X0 ;PUSHDOWN IN DECLSTACK
SOJG X2,TRUE ;JUMP IF MORE WORDS IN RECORD
SA RETURN
EPROC
O2DIN1: IN QCHDF1,
GOTO O2DL5 ;CORRECT RETURN
GETSTS QCHDF1,YO2STS
O2DINERR:
FATAL 6,ERROR ON INPUT FROM DF1
O2DTYPE:
IF SKIPE YBHDF1+2
GOTO FALSE
THEN
IN QCHDF1,
GOTO FALSE
GETSTS QCHDF1,YO2STS
LI IO.EOF
TDNN YO2STS
GOTO O2DINERR
LI X4,[0]
RETURN
FI
ASSERT<SKIPL @YBHDF1
RFAIL BUFFER SYNC ERROR O2D1
>
L X4,YBHDF1+1
AOS X4
RETURN >
SUBTTLE O2IS
;PURPOSE: READ A SYMBOL FROM IC1 TO REG XCUR
;ENTRY: O2IS
;NORMAL EXIT: RETURN
;ERROREXIT:
;OUTPUT ARGUMENT: REG XCUR CONTAINING CURRENT SYNBOL
O2IS:
SOSGE YBHIC1+2 ;Countdown of words in buffer
EXEC O2IC ;Next buffer when exhausted
ILDB XCUR,YBHIC1+1 ;GET SYMBOL
ASSERT <
SKIPE YO2LIT ;Should not be reading a literal
RFAIL (CALL ON O2IS WHEN O2IV EXPECTED)
IF ;Identifier
CAMG XCUR,YMAXID
CAIGE XCUR,QLOWID
GOTO FALSE
THEN
RETURN
FI
IF
CAIGE XCUR,400000
GOTO FALSE
THEN
LI X1,2
ST X1,YO2LIT
RETURN
FI
CAILE XCUR,SYMBL5
RFAIL (INVALID SYMBOL IN IC1)
L X1,O2ST(XCUR) ;GET NUMBER OF LITERALS
ST X1,YO2LIT
>
RETURN
ASSERT <
O2ST: SYMB (2,1,SYMBTAB)> ;GENERATE LIST
;O2IC GETS A NEW BUFFER FROM IC1, BUFFERHEADER IS UPDATED
;TO MAKE IT POSSIBLE TO READ ONLY HALFWORDS
O2IC:
ASSERT< SKIPN YELIC1
RFAIL READING PAST EOF IN IC1
>
IF IN QCHIC1,
GOTO TRUE
GOTO FALSE
THEN
SOS YBHIC1+2
RETURN
ELSE
GETSTS QCHIC1,YO2STS
IOER IC1
EXEC O2ERI
FI
SUBTTLE O2IV
;PURPOSE: READ A VALUE FROM IC1
;ENTRY: O2IV
;NORMAL EXIT: RETURN
;ERROR EXIT:
;OUTPUT ARGUMENT: REG X0 CONTAINING VALUE FROM IC1
O2IV:
SOSGE YBHIC1+2 ;IF MORE WORDS IN BUFFER SKIP NEXT INSTR
EXEC O2IC
ILDB X0,YBHIC1+1 ;GET VALUE
ASSERT <
SOSGE YO2LIT ;SKIP NEXT INSTR IF LITERAL ALLOWED
RFAIL (TOO MANY CALLS ON O2IV AFTER O2IS)>
RETURN
SUBTTL O2DF
;PURPOSE: DEFINE CODE ADDRESS OF A PROGRAM COORDINATE
;OUTPUT FIXUP TO IC2
;ENTRY: O2DF
;NORMAL EXIT: RETURN
;ERROR EXIT:
;INPUT ARG: X1 CONTAINING INDEX FIXUPTABLE ZFX
; YQREL CONTAINS RELOCATION FOR FIXUP OR ZERO (GLOBAL REQUEST)
O2DF:
PROC
SAVE <X1,X2,X5,X6,X3,X4>
SETZM YLXIAC
ADD X1,YFXTAB
L X3,X1
L X5,(X3)
ASSERT< ; CHECK FIXUP STATUS
LF ,ZFXTYP(X1)
CAIN QA
RFAIL UNUSED FIXUP DEFINED
CAIN QE1
RFAIL FIXUP ALREADY DEFINED
CAIN QF
RFAIL FXTYP QF IN O2DF
>
IF SKIPN X1,YQREL
GOTO FALSE
THEN L X6,YNOREL(X1)
HRL X6,X1
ELSE
L X6,X3
SUB X6,YFXTAB
FI
LI QE1
SF ,ZFXTYP(,X6)
SKIPE YTENT ; NO REDEFINITION IF ZERO
HRRO X3,X3
LOOP
EXCH X5,YO2LAS
EXCH X6,YO2LAS+1
EXCH X3,YO2FIX
SETZM YTENT
IF JUMPE X3,FALSE
THEN
ST X6,(X3)
L X1,X3
L X3,YO2IQI
TLZ X5,777000
TLZ X6,777000
EXEC O2DFOUT
FI
AS SETZ X3,
SKIPLE YO2FIX
GOTO TRUE
SA
RETURN
EPROC
O2DFOUT: PROC; STORE CONTENTS OF X5-X6 IN BUFFER YO2IQB OR YO2ITB, UPDATE YO2IQI
SKIPN X5
RETURN ; DO NOT OUTPUT IF CHAIN IS ZERO
edit(43)
L X4,YO2CIQ ;[43] CURRENT IQ BUFFER START TO X4
edit(106)
IF CAIGE X3,QBUFS-5 ;[106] OUTPUT ONLY DOUBLE WORDS
GOTO FALSE
THEN
IF HLRZ X1,(X4) ;[43]
CAIE X1,10
GOTO FALSE
THEN ;BLOCK TYPE 10 WITH COUNT IN SECOND WORD
HRRZ X1,(X4) ;[43]
ST X1,1(X4) ;[43] ; SET COUNT
edit(43)
;[43] START
IF ;FIRST IQ BUFFER FULL?
CAIE X4,YO2IQB
GOTO FALSE
THEN ;CHANGE CURRENT IQ BUFF TO SECOND (YO2ITB)
LI X4,YO2ITB
ELSE ;OUTPUT PARTLY FILLED CODE STREAM BUFFERS
;ZERO THE REST OF THE IC2 BUFFER
;OUTPUT THE 2 IQ BUFFERS
;SET CURRENT IQ BUF TO YO2IQB
EXEC O2IC2P
EXEC O2IC2Z
LI X1,YO2IQB
EXEC O2IC2
LI X1,YO2ITB
EXEC O2IC2
LI X4,YO2IQB
FI
ST X4,YO2CIQ
;[43] END
LI X3,2 ; FIRST USED WORD FOR TYPE 10
ELSE ; TYPE 2 BLOCK
LI X1,YO2IQB
EXEC O2IC2
LI X3,1 ; FIRST USED WORD FOR TYPE 2 BLOCK
FI
HLLZS (X4) ;[43]
ST X3,YO2IQI
IFN QDEBUG,<
SETZ X1,
>
FI
edit(43)
ADD X3,X4 ;[43]
STD X5,(X3) ;[43]
LI X3,2
ADDM X3,YO2IQI
ADDM X3,(X4) ;[43]
IFN QDEBUG,<
;EDIT THE DEBUG OUTPUT IF SO2D1 IS SET
IF
IFOFF SO2D1
GOTO FALSE
THEN
EXEC O2DB1,<<[020000,,]>> ;NEW LINE
SUB X1,YFXTAB
HRL X1,X1
EXEC O2DB3,<<[610000,,'IQ ']>,X1> ;'IQ ', FIXUP INDEX
LF X1,ZFXCOD(,X5)
HLR X0,YO2NOR(X1)
HLR X1,X5
HRLI X1,116000 ;116000,,X5(L)
HRL X0,X5 ;X5(R),,'REL CODE'
EXEC O2DB4,<X1,X0>
EXEC O2DB1,<<[020000,,]>> ;NEW LINE
EXEC O2DB2,<<[600000,,]>> ;HTAB
HLR X1,X6
HLR X0,YO2NOR(X1)
HRLI X1,116000 ;116000,,X6(L)
HRL X0,X6 ;X6(R),,'REL CODE'
EXEC O2DB4,<X1,X0>
FI
> ;END OF IFN QDEBUG,
RETURN ;[43]
EPROC
SUBTTL O2AF
;PURPOSE: UNCHAIN A FIXUP TYPE A
;ENTRY : O2AF
;INPUT ARG: -
;NORMAL EXIT: RETURN
;ERROR EXIT: -
;OUTPUT ARGUMENTS: X0 is fixup index
O2AF: PROC
SAVE <X2,X3>
L X1,YFXCH ;START OF CHAIN OF AVAILABLE FIXUPS
IF ;[271] No more free fixups available
edit(271)
JUMPG X1,FALSE
THEN ;Error
FATAL 3,Too complicated program structure
FI
L X2,(X1)
SETZM (X1)
ASSERT <
SKIPN YFXCH
RFAIL NO MORE FIXUPS AVAILABLE IN O2AF
SKIPG YFXCH
RFAIL NO FIXUP TO UNCHAIN
LDB X3,[$ZFXTYP (X1)]
CAIE X3,QA
RFAIL WRONG TYPE OF FIXUP IN ZFX TO UNCHAIN>
LI X3,QB
DPB X3,[$ZFXTYP (X1)]
HRRM X2,YFXCH
L X0,X1
SUB X0,YFXTAB
RETURN
EPROC
SUBTTLE O2CF
;PURPOSE: MAKE A FIXUP AVAILABLE FOR REALLOCATION BY O2AF
;ENTRY: O2CF
;INPUT: REG X1 CONTAINING FIXUP INDEX TO ZFX
;NORMAL EXIT: RETURN
O2CF:
ADD X1,YFXTAB
IFN QDEBUG,<LI QA
SF ,ZFXTYP(X1)
>
L X0,YFXCH
ST X1,YFXCH
HRRZM X0,(X1)
RETURN
SUBTTL O2DFTE [2]
edit(2)
COMMENT;
PURPOSE: OUTPUT TENTATIVE FIXUP IF PREVIOUSLY DEFINED
BUT NOT YET OUTPUT
ENTRY: O2DFTE
INPUT ARG: YO2FIX = -1 ,,FIXUP INDEX + YFXTAB
YO2LAS = RCODE,,ADDRESS
YO2LAS+1 = RCODE,,VALUE
NORMAL EXIT: RETURN
CALL FORMAT: EXEC O2DFTE
;
;[2] NEW ROUTINE
O2DFTE: PROC
IF
SKIPL X1,YO2FIX
GOTO FALSE
THEN
;A TENTATIVE FIXUP REMAINS IN YO2LAS AND YO2LAS+1
STACK X3
L X3,YO2IQI
EXCH X5,YO2LAS
EXCH X6,YO2LAS+1
ST X6,(X1)
TLZ X5,777000
TLZ X6,777000
EXEC O2DFOUT
SETZB X5,X6
EXCH X5,YO2LAS
EXCH X6,YO2LAS+1
SETZM YO2FIX
UNSTK X3
FI
RETURN
EPROC
SUBTTL LITERALS
LIT
RELOC
VAR
END