In my latest project, I've had the need to optimize a lot of stuff, and I learned that a fast way to do a shift by 4 on a byte is to swap nybbles. But when I started looking at the assembly output of the compiler, I noticed >>4 and <<4 weren't being optimized to a swap command, but were instead loop…

Why doesn't Arduino 1.0.1 use the latest GCC?

MichaelMeissner November 20, 2012, 3:01pm 5

Have you filled a bug report at GCC Bugzilla Main Page? Things won't get fixed if people don't complain about them in the proper channels.

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