
Add an ext16u op, either using the uxth instruction on ARMv6+ or two shifts on previous ARM versions. In both cases the result use the same number or less instructions than the pure TCG version. Also move all sign extension code to separate functions, so that they can be reused in other parts of the code. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
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Read the documentation in qemu-doc.html. Fabrice Bellard.
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