[sdcc-devel] [ sdcc-Feature Requests-2915673 ] Little endians and the hc08

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Feature Requests item #2915673, was opened at 2009-12-16 17:59
Message generated for change (Settings changed) made by spth
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>Category: None
>Group: None
Status: Open
Priority: 5
Private: No
Submitted By: Gary Osborn (garyosborn)
Assigned to: Nobody/Anonymous (nobody)
Summary: Little endians and the hc08

Initial Comment:
The hc08 system reverses the byte order of the ret2 and ret3 portion of
4-byte values returned by functions.  The inconsistency has no adverse
consequencess for the hc08, as it moves 32 bit values in 8 bit chunks,
but the hcs08 can usually move large data items in 16 bit chunks, and
the reversed byte order makes optimization for the hcs08 impossible.
The attached files transfer 32 bit results in a consistent big endian
format.  The library must be rebuilt after incorporating the changes.

The new version also shows the name of variables on the SP stack as a
comment, which makes the assembly language output files more readable
when the code is compiled with the --stack-auto option.  There are other
cosmetic changes to enhance legibility, and to provide a better
foundation for the hcs08 upgrade.

The corrections for bug 1579949 must be completed before these changes
will pass the hc08 regression test with the --stack-auto option.  For
preliminary testing, simply delete file
SDCC/support/regression/tests/bug1579949.c The bug has no connection
with these revisions.  See bug 2912013 for more info.






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