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Author SHA1 Message Date
H. Peter Anvin (Intel)
5b39461178 obsolete handing: handle a few more subcases in a useful way 
Distinguish instructions which have once been valid (OBSOLETE) from
those that never saw the light of day (NEVER). Futhermore, flag
instructions which devolve to an architectural noop from those with
undefined behavior and possibly recycled opcodes.

Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
 2019-08-09 14:52:16 -07:00
H. Peter Anvin (Intel)
fb11889040 BR 3392590: add warning for valid but obsolete instructions 
Just becase one is compiling for an old CPU doesn't mean one wants to
use obsolete instructions that would not be forward compatible. Rename
the "obsolete" warning to "obsolete-removed" and create a new
"obsolete-valid" warning to go with it (-w[+-]obsolete controls both
options, as usual.)

Suggested-by: C. Masloch <pushbx@38.de>
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
 2019-08-09 14:21:42 -07:00