[llvm-bugs] [Bug 33018] New: [mc] Disassembler incorrectly decodes v_fract_f64_e64

via llvm-bugs llvm-bugs at lists.llvm.org
Fri May 12 03:46:00 PDT 2017


            Bug ID: 33018
           Summary: [mc] Disassembler incorrectly decodes v_fract_f64_e64
           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

v_fract_f64_e64 is decoded as v_mqsad_u16_u8.

Looks like v_mqsad_u16_u8 has the same opcode as v_fract_f64_e64:

  v_mqsad_u16_u8 v5, s0, s0 
                        encoding: [0x05,0x00,0x72,0xd1,0x00,0x00,0x00,0x00]
  v_fract_f64_e64 v[5:6], s[0:1]
                        encoding: [0x05,0x00,0x72,0xd1,0x00,0x00,0x00,0x00]

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