Shifting is now prohibited only for relocatable expressions. It is fine if a shift operator is used with constant operands, simply producing another constant.
Also, spurious errors about using multiple load segments in an expression are no longer reported just because of the load segment "containing" the EQU/GEQU record. Since it does not actually translate to anything in the load file, that segment does not matter.
Previously, the values of such expressions were essentially ignored, resulting in incorrect output.
This affected code like the following example:
test1 start
lda >p
rtl
end
D1 data
p gequ val
end
val data
dc i'123'
end
Note that the EQU/GEQU expression is evaluated within the context of the location that references it, not the location where it is defined. This affects the value of the location counter, as well as the symbol search behavior. The references for the OMF format do not clearly define which way this should be done, but the current behavior can cause problems with certain object files produced by ORCA/M.
Stephen Heumann
Kelvin Sherlock
mikew50