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Missing -march=sempron -mtune=sempron -msse3 -m3dnow+?


Why is GCC-4.2.x missing -march=sempron -mtune=sempron -msse3 -m3dnow+?

Why is GCC-4.2.x missing -march=k8 -mtune=athlonxp -mtune=athlon-xp
-mtune=athlon_xp -msse3 -m3dnow+ -m32?

Why is the table gcc/config/i386/i386.c:processor_alias_table[] small
and unextendable?

GCC want to say me bad news for powerful antiquities "Athlon-XP
TBred", "Athlon-XP Barton", "Athlon64 Venice (939 pins and SSE3)"
since 4 years and their performance match to the current processors.


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