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  • Jan Beulich's avatar
    x86: relax redundant REX prefix check · 44846f29
    Jan Beulich authored
    All REX bits can be specified via individual prefixes. Redundancy should
    only be reported on a per-bit basis.
    
    Note that I originally had further checks added to the test case,
    checking the effect also on PDEP. I had to strip those, because my patch
    to correctly handle those
    (https://sourceware.org/ml/binutils/2017-02/msg00280.html) was rejected.
    I continue to think that there should not be any new prefix introduced
    to handle the VEX case - whether the encoding of an insn requires VEX et
    al should not be of immediate interest to the programmer.
    44846f29