https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100866
--- Comment #7 from Jens Seifert <jens.seifert at de dot ibm.com> ---
Regarding vec_revb for vector unsigned int. I agree that
revb:
.LFB0:
.cfi_startproc
vspltish %v1,8
vspltisw %v0,-16
vrlh %v2,%v2,%v1
vrlw %v2,%v2,%v0
blr
works. But in this case, I would prefer the vperm approach assuming that the
loaded constant for the permute vector can be re-used multiple times.
But please get rid of the xxlnor 32,32,32. That does not make sense after
loading a constant. Change the constant that need to be loaded.
