[Bug target/126973] __builtin_clzg could be improved by using bsrw rather than bsrl or using a shift rather than an and/sub

[jakub at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126973

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |jakub at gcc dot gnu.org,
                   |                            |liuhongt at gcc dot gnu.org

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Presumably for -Os using tzcntw/lzcntw would be a good idea, but I wonder if it
would be actually faster for -O2.