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Update to gcc6809lw patch which may help compilation of some sources Due to persistent random compiler crashes and errors related to "M_REGS", this patch update (4.6.4-2) essentially removes the varius constraints allowing the "soft registers" in most operations. It was causing more problems than it solved and it is not clear that the logic behind those soft registers even makes sense any more. This patch also fixes a bogus comparison related to selecting the right size for a constant. Instead of the excessively clever comparison scheme that was previously in use, the comparisons have been replaced with straight forward comparisions for the top and bottom of the relevant 2's complement ranges.
author William Astle <lost@l-w.ca>
date Mon, 20 Jul 2015 22:32:41 -0600
parents fc166b3bbae3
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>3.11. Convenience Instructions</A
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>&#13;Similar to the 6800 compatibility instructions (pragma 6800compat) these
pragma 6809conv and pragma 6309conv enable convenience extensions to the
6809 and 6309 instruction set.  Originally intended for compatibility with
the MACRO-80c assembler, these have proven useful in large codebases that
target both the 6809 and the 6309.</P
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>&#13;The 6809 extensions are straightforward with the exception of "TSTD" which
assembles as "STD -2,S".  A benefit of using these is they will "just work"
and take on their 6309 equivalent when you enable 6309 assembly mode. 
Supported instructions: ASRD, CLRD,   COMD,   LSLD,   LSRD,   NEGD,   TSTD.</P
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>&#13;6309 extensions are based on common patterns described by Chris Burke and
Darren Atkinson in their 6309 documentation and include the following
instructions: ASRQ,   CLRQ,   COMQ,   LSLE,   LSLF,   LSLQ,   LSRQ,   NEGE,
   NEGF,   NEGW,   NEGQ,   TSTQ.</P
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