[Bug gas/32037] New: RISC-V xventanacondops: Unrecognized opcode `vt.maskcn a0, a1, a0`

[patrick at rivosinc dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=32037

            Bug ID: 32037
           Summary: RISC-V xventanacondops: Unrecognized opcode `vt.maskcn
                    a0, a1, a0`
           Product: binutils
           Version: 2.44 (HEAD)
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gas
          Assignee: unassigned at sourceware dot org
          Reporter: patrick at rivosinc dot com
  Target Milestone: ---

Binutils output:
/scratch/tmp/red-0f5881.s: Assembler messages:
/scratch/tmp/red-0f5881.s:25: Error: unrecognized opcode `vt.maskcn a0,a1,a0'

Also seeing testcases fail with vt.maskc:
Error: unrecognized opcode `vt.maskc a2,a2,a0'

I think these formats follows the spec.

xventanacondops spec:
https://github.com/ventanamicro/ventana-custom-extensions/releases/download/v1.0.0/ventana-custom-extensions-v1.0.0.pdf

Found when fuzzing clang.

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