[LLVMbugs] [Bug 8061] New: xchgl/in/out instructions unknown to MC

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Thu Sep 2 09:31:00 PDT 2010


           Summary: xchgl/in/out instructions unknown to MC
           Product: libraries
           Version: trunk
          Platform: PC
        OS/Version: FreeBSD
            Status: NEW
          Severity: normal
          Priority: P
         Component: Backend: X86
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: rdivacky at freebsd.org
                CC: llvmbugs at cs.uiuc.edu

pes ~/mc-elf$ cat xchgl.s
 xchgl   368(%rax),%ecx

 outb    123, %al

 inb     %al, 123
pes ~/mc-elf$ llvm-mc xchgl.s
        .section        __TEXT,__text,regular,pure_instructions
xchgl.s:1:2: error: unrecognized instruction
 xchgl   368(%rax),%ecx

xchgl.s:3:2: error: unrecognized instruction
 outb    123, %al

xchgl.s:5:2: error: unrecognized instruction
 inb     %al, 123

MC does not know about these instructions although they all seem to be defined

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