[Issue 23123] -vasm wrong result for cmpxchg16b

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23123

Dlang Bot <dlang-bot at dlang.rocks> changed:

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--- Comment #1 from Dlang Bot <dlang-bot at dlang.rocks> ---
@maxhaton created dlang/dmd pull request #14136 "Fix Issue 23123 - -vasm
ignored REX prefix for cmpxchg" fixing this issue:

- Fix Issue 23123 - -vasm ignored REX prefix for cmpxchg

  This led to a mistaken bug report because obj2asm has the same issue.
  The bug makes it look like dmd is emitting the wrong CAS instruction (but it
  actually was)

https://github.com/dlang/dmd/pull/14136

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