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decuslib20-03
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decus/20-0078/libsim/loadby.mac
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COMMENT * SIMULA specification;
OPTIONS(/E:QUICK,loadbyte);
INTEGER PROCEDURE loadbyte(bp,incr); INTEGER bp,incr;
COMMENT Load a byte via the standard byte pointer BP.
If incr = 0, use LDB, if incr = 1, use ILDB. If other values of incr are given,
modify before using LDB.
;
!*;! MACRO-10 code !*;!
TITLE loadbyte
ENTRY loadbyte
SUBTTL SIMULA utility, Lars Enderin Oct 1977
;!*** Copyright 1977 by the Swedish Defence Research Institute. ***
;!*** Copying is allowed. ***
sall
search simmac,simmcr,simrpa
macinit
;! Local definitions ;!
bp==<result==0>
incr=bp+1
loadbyte:
PROC
LD bp(XTAC)
IF JUMPN X1,FALSE
THEN LDB X1,
ELSE
IF CAIE X1,1
GOTO FALSE
THEN ILDB X1,
ELSE ;!Modify (KL-10 only)
ADJBP X1,bp(XTAC)
LDB X1,X1
FI FI
ST X1,result(XTAC)
RET
EPROC
LIT
END;