[Nasm-bugs] [Bug 3392363] New: rep prefix after EVEX instruction

[no-reply at bugzilla-nasm.gorcunov.org]

https://bugzilla.nasm.us/show_bug.cgi?id=3392363

            Bug ID: 3392363
           Summary: rep prefix after EVEX instruction
           Product: NASM
           Version: unspecified
          Hardware: All
                OS: All
            Status: OPEN
          Severity: normal
          Priority: Medium
         Component: Assembler
          Assignee: nobody at nasm.us
          Reporter: henrik at gramner.com
                CC: gorcunov at gmail.com, hpa at zytor.com, nasm-bugs at nasm.us

The specific sequence of an EVEX-encoded instruction using an opmask directly
followed by a rep prefix results in the following message: "error: invalid
combination of opcode and operands".

Interestingly it works when the opmask is omitted.

Minimal test case:

    vaddps zmm0 {k1}, zmm0, zmm0
    rep

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