[LLVMbugs] [Bug 21168] New: PFRCP instruction cannot be disassembled

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Mon Oct 6 08:49:46 PDT 2014


            Bug ID: 21168
           Summary: PFRCP instruction cannot be disassembled
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Backend: X86
          Assignee: unassignedbugs at nondot.org
          Reporter: clandau at macslab.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

Disassembly of the following bytes fails:

0F 0F C0 96

X86Instr3DNow.td has this comment:

    // FIXME: The disassembler doesn't support Has3DNow0F0FOpcode yet.

This opcode is challenging because the 0F 0F is followed by the ModRM byte and
then the opcode byte.

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