In that case, I would argue that it should optimise for more modern
processors - that is, favour MOVZX, especially as the first few Pentium
processors were released in the 90s. If backwards-compatibility is more
of a concern, well, if compiling for x86-64, when it's certain that the
processor was released no earlier than the early 2000s (because, for
x86_64-win64, SSE2 has to be present) and hence MOVZX is efficient, while
i386 and i8086 can favour MOV/AND.
Nevertheless, there is code in parts of the compiler that check for things
like "if current_settings.cputype
_______________________________________________
fpc-devel maillist - fpc-devel@lists.freepascal.org
http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-devel
