[LLVMbugs] [Bug 10344] New: Incorrect disassembly for "0x49 0x90" on x86-64 ("xchg %r8, %rax")

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Tue Jul 12 15:06:14 PDT 2011


http://llvm.org/bugs/show_bug.cgi?id=10344

           Summary: Incorrect disassembly for "0x49 0x90" on x86-64 ("xchg
                    %r8, %rax")
           Product: new-bugs
           Version: unspecified
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: sharparrow1 at yahoo.com
                CC: llvmbugs at cs.uiuc.edu


$ echo "0x49 0x90" | llvm-mc -disassemble
    nop

This instruction is actually "xchg %r8, %rax", not a nop.

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