[llvm-bugs] [Bug 45193] New: [AMDGPU][MC][GFX10][DISASSEMBLER] Failure to decode valid v_writelane_b32 code

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https://bugs.llvm.org/show_bug.cgi?id=45193

            Bug ID: 45193
           Summary: [AMDGPU][MC][GFX10][DISASSEMBLER] Failure to decode
                    valid v_writelane_b32 code
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Backend: AMDGPU
          Assignee: unassignedbugs at nondot.org
          Reporter: dpreobrazhensky at luxoft.com
                CC: llvm-bugs at lists.llvm.org

Disassembler failed to decode the following valid code fragment:

    0xff,0x00,0x61,0xd7,0x01,0x04,0x00,0x00

expected result:

    v_writelane_b32 v255, s1, s2

Correcting the first byte as follows:

    0xfe,0x00,0x61,0xd7,0x01,0x04,0x00,0x00

result in successfuly decoded instruction:

    v_writelane_b32 v254, s1, s2

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