H. Peter Anvin e20ca02cfb BR 3392260: Handle instructions only separated by vector SIB size
There are two instructions (VGATHERQPS, VPGATHERQD) where the only
separation between two forms is the vector length given to the vector
SIB.  This means the *matcher* has to be able to distinguish
instructions by vector SIB length and the matcher only operates on the
operands and the instruction flags, not on the bytecode.

Export the vector index-ness into the operand flags and add to the
matcher.

This resolves BR 3392260.

Reported-by: Agner <agner@anger.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
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              NASM, the Netwide Assembler.

Many many developers all over the net respect NASM for what it is
- a widespread (thus netwide), portable (thus netwide!), very
flexible and mature assembler tool with support for many output
formats (thus netwide!!).

Now we have good news for you: NASM is licensed under the "simplified"
(2-clause) BSD license.  This means its development is open to even
wider society of programmers wishing to improve their lovely
assembler.

The NASM project is now situated at SourceForge.net, the most
popular Open Source development site on the Internet.

Visit our website at http://nasm.sourceforge.net/ and our
SourceForge project at http://sourceforge.net/projects/nasm/

See the file CHANGES for the description of changes between revisions,
and the file AUTHORS for a list of contributors.

                                                   With best regards,
                                                           NASM crew.
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