view docs/manual/x816.html @ 508:10f62dc61a75

Fix bad usage of sprintf() Usage of sprintf() to append to a string in the form of sprintf(buf, "%s...", buf...) is undefined, regardless whether it worked on a lot of older systems. It was always a bad idea and it now breaks on current glibc and gcc development environments. The moral: if any of your code uses sprintf() in a way similar to the above, fix it. It may not fail in a benign way.
author William Astle <lost@l-w.ca>
date Sun, 10 May 2020 22:38:24 -0600
parents 52af0aa54fe5
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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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