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7-sources/ddbsym.mac
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UNIVERSAL DDBSYM -- MACRO programming environment
;
; COPYRIGHT (C) DIGITAL EQUIPMENT CORPORATION 1984, 1986.
; ALL RIGHTS RESERVED.
;
; THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY BE USED AND
; COPIED ONLY IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE AND WITH
; THE INCLUSION OF THE ABOVE COPYRIGHT NOTICE. THIS SOFTWARE OR
; ANY OTHER COPIES THEREOF MAY NOT BE PROVIDED OR OTHERWISE MADE
; AVAILABLE TO ANY OTHER PERSON. NO TITLE TO AND OWNERSHIP OF THE
; SOFTWARE IS HEREBY TRANSFERRED.
;
; THE INFORMATION IN THIS SOFTWARE IS SUBJECT TO CHANGE WITHOUT
; NOTICE AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY DIGITAL
; EQUIPMENT CORPORATION.
;
; DIGITAL ASSUMES NO RESPONSIBILITY FOR THE USE OR RELIABILITY OF
; ITS SOFTWARE ON EQUIPMENT THAT IS NOT SUPPLIED BY DIGITAL.
;
SUBTTL Standard register definitions
T0==0
T1==1
T2==2
T3==3
T4==4
T5==5
P1=6
P2=7
P3=10
P4=11
P5=12
P6=13
P7=14
F=15
CX=16
P=17
; Define a standard version number word
DEFINE VERS. (MAJVER, MINVER, EDIT, VCUST)
<BYTE (3)VCUST(9)MAJVER(6)MINVER(18)EDIT>
; Macro to redefine a register. This should be the only way in which alternate
; names are assigned to registers. This macro prevents you from
; referring to a register by two names in the same section of code.
; The section of code using the altername name FOO for register P1 should
; be bracketed as follows:
; REGDEF P1, FOO
; . . .
; UN$FOO
; All the new register names used in a single program should be unique in the
; first 3 characters.
DEFINE REGDEF (OLD, NEW) <
IF1, <IFDEF NEW, <PRINTX Attempted redefinition of NEW as register OLD>>
NEW==OLD
IF2, <PURGE OLD>
DEFINE UN$'NEW <
OLD==NEW
IF2, <PURGE NEW>>>
; Standard byte-pointer field masks
BP%ADR==37777777 ;Address part of byte pointer
BP%POS==77B5 ;# of unused bits in word
BP%SIZ==77B11 ;Size of bytes
BP%2WD==1B12 ;[55] Set if two-word format
SUBTTL Utility macros and definitions
; STRIP -- remove one level of angle-brackets from one param, then call
; another macro.
DEFINE STRIP (MAC, ARGS) <
MAC ARGS
>;END DEFINE
; An extension to the names for non-printing characters defined in MACSYM
.CHSP==40 ;Space
; Job data area definitions
.JBINT==134 ;Interrupt block address
; Subroutine call and return macros.
OPDEF CALL [PUSHJ P,]
OPDEF RET [POPJ P,]
DEFINE RETSKP <JRST SKPRET##> ;Support routine in STKRET
SUBTTL STKVAR -- Temporary storage on the stack
; This routine replaces the one in MACSYM, assuming that you search
; DDBSYM first. This routine is considerably better than the one in
; MACSYM, but will only run on a KL processor.
; This routine requires the support routine STKRET.
; STKVAR is called with a single parameter, which is a list of pairs
; of item-name, length. Length may be omitted and defaults to one word.
; Space is allocated at the top of the stack, the names specified are
; defined to reference the items (memory reference), and a special return
; is set up so that the items are removed on a RET or RETSKP.
DEFINE STKVAR (VAR) <
CNT==1
IRP VAR, <
STRIP .STKV1, VAR>
ADJSP P, CNT-1
PUSH P, [<0,,-CNT>]
PUSH P, [STKRET##]
PURGE CNT, ..X1
>;END DEFINE
DEFINE .STKV1 (VAR, SIZ<1>) <
CNT==CNT+SIZ
..X1==10
RADIX ^D8
.STKV2 VAR, \CNT
RADIX ..X1
>;END DEFINE
DEFINE .STKV2 (VAR, OFF) <
DEFINE VAR <-^O'OFF(P)>
$'VAR==<Z VAR>
>;END DEFINE
SUBTTL Standard Calling Sequence (COBOL/FORTRAN) definitions
; Standard calling sequence argument list
.SCCNT==-1 ;Position in list for arg count
SC%TYP==17B12 ;Argument type
.SCCMP==2 ;One-word computational
.SC2C==11 ;Two-word computational
.SCC1==4 ;One-word floating point (comp-1)
.SCDIS==15 ;Display
.SCRTN==7 ;Procedure name
; Details of 2-word descriptor for display items
.SCBP==0 ;First word of descriptor is byte pointer
.SCDES==1 ;Second word is description
SC%NUM==1B0 ;Numeric flag
SC%DTP==17B4 ;Type of display (6, 7, 9, C3)
.STUN==0 ;Unspecified type
.STD6==1 ;Display-6
.STD7==2 ;Display-7
.STD9==3 ;Display-9
.STC3==4 ;Comp-3
SC%SGN==1B1 ;Sign flag
SC%FIG==1B2 ;Figurative constant flag
SC%P==1B12 ;Flag for P's preceding decimal point in PICTURE
SC%SCL==37B17 ;Scale or number of P's
SC%SIZ==777777 ;Size of item in bytes
SUBTTL SCENT -- entry for routine using standard calling sequence
; Names for bit patterns used in specifying allowable types
SC%ACM==1B<^D35-.SCCMP>
SC%AC1==1B<^D35-.SCC1>
SC%A2C==1B<^D35-.SC2C>
SC%ADS==1B<^D35-.SCDIS>
SC%APR==1B<^D35-.SCRTN>
; Names for bit patterns used in specifying allowable display
; sub-types.
SC%AUN==1B<^D35-.STUN>
SC%AD6==1B<^D35-.STD6>
SC%AD7==1B<^D35-.STD7>
SC%AD9==1B<^D35-.STD9>
SC%AC3==1B<^D35-.STC3>
; Macro to define an entry point to a subroutine using the standard calling
; sequence. This entry provides for optional checking of the number and type
; of arguments passed. Checking is implemented by the external subroutine
; SCCHK.
; Parameters to SCENT are:
; ENAM Name for entry point. This is declared as an entry and a label
; MNPRM Minimum allowable number of parameters
; MXPRM Maximum allowable number of parameters (negative for no max)
; WNA Statement to execute when wrong number of arguments passed
; (must generate exactly one word of code and cause transfer of
; control)
; WTA Statement to execute when wrong type argument is passed
; (must generate exactly one word of code and cause transfer of
; control)
; RTCHK Set non-zero to compile code with run-time checking. Set zero
; or nonexistent to suppress this code.
; CLIST List of descriptors of blocks of allowable parameters. Each block
; is of the form <<list of allowable params>, repeat>, where
; the repeat count defaults to 1.
; The list of allowable parameters is a bracketed list of pairs of
; bit patterns, where the first specifies the allowable data
; types, and the second specifies the allowable display sub-types
; (and need not be present unless display is listed as valid in
; the first of the pair).
; Example of CLIST:
; <<<<SC%ACM!SC%ADS,SC%AUN!SC%AD6>,<SC%APR>>,5>,<<<SC%ACM>>>>
; The table produced is of the following form:
.CERTN==0 ;Address of ASCIZ of name of routine whose
;arguments we are checking
.CEMIN==1 ;- Min # arguments
.CEMAX==2 ;- Max # arguments ( >0 indicates no max)
.CEWNA==3 ;Instruction for wrong number of arguments
.CEWTA==4 ;Instruction for wrong type of argument
.CEBL1==5 ;-Repeat count,,0 for first block
; 6 Valid types,,Valid subtypes
; ... Further parameters in the block
; n -Repeat count,,0 for second block
; ...
; m 0,,0 to indicate end of control list
DEFINE SCENT (ENAM,MINPRM,MAXPRM,WNA,WTA,RTCHK,CLIST) <
IFDEF RTCHK, <
IFN RTCHK, <
..SCE==.
[ASCIZ /ENAM/]
EXP -MINPRM,-MAXPRM
WNA
WTA
IRP CLIST, <
STRIP SCE2, CLIST
>;END IRP CLIST
XWD 0, 0
>;END IFN RTCHK
>;END IFDEF RTCHK
ENTRY ENAM
ENAM:
IFDEF RTCHK, <
IFN RTCHK, <
MOVX T1, ..SCE
CALL SCCHK## ;External support routine
>;END IFN RTCHK
>;END IFDEF RTCHK
PURGE ..SCE
>;END DEFINE SCENT
DEFINE SCE2 (VALTPS, REPEAT<1>) <
XWD -REPEAT, 0
IRP VALTPS, <
STRIP SCE3, VALTPS
>;END IRP VALTPS
>;END DEFINE SCE2
DEFINE SCE3 (VALTYP, VALDSP) <
XWD VALTYP, VALDSP
>;END DEFINE SCE3
SUBTTL $IF macros -- IF -- THEN -- ELSE for any condition
; This macro, when called as below, defines a series of $IF macros which may
; be called as follows:
; $IFLE COND, THEN, ELSE
DEFINE $DIF (QUALIF) <
IRP QUALIF, <
DEFINE $IF'QUALIF (EXPR, THEN, ELSE) <
..EX==EXPR
..TMP==1
IF'QUALIF ..EX, <
THEN
..TMP==0>
IFN ..TMP, <ELSE>
PURGE ..EX, ..TMP>>>
$DIF <E,N,G,GE,L,LE,DEF,NDEF,IDN,DIF>
PURGE $DIF
END