https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126000
Hongtao Liu <liuhongt at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |liuhongt at gcc dot gnu.org
--- Comment #3 from Hongtao Liu <liuhongt at gcc dot gnu.org> ---
GAS handles the downward direction automatically and safely(EVEX -> VEX). The
upward direction — promoting VEX to EVEX for code size benefits in specific
sequences — requires explicit {evex} prefix annotation in GCC, since the
assembler lacks the global context needed to make that decision correctly.
