[LLVMbugs] [Bug 8935] New: [MC x86] does not know xgetbv instruction

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=8935

           Summary: [MC x86] does not know xgetbv instruction
           Product: new-bugs
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: kaffeemonster at googlemail.com
                CC: llvmbugs at cs.uiuc.edu


TOT at 123092

int test_cpu_feature_avx_callback(void)
{
    unsigned low, high;
    asm volatile(
        "xgetbv\n"
        : /* %0 */ "=a" (low),
          /* %1 */ "=d" (high)
        : /* %2 */ "c" (0)
    );
    if((low & 0x06) != 0x06)
        return 0;
    return 1;
};

$ clang -c xgetbv.c 
xgetbv.c:5:3: error: invalid instruction mnemonic 'xgetbv'
                "xgetbv\n"
                ^
<inline asm>:1:2: note: instantiated into assembly here
        xgetbv
        ^
1 error generated.

Greetings
Jan

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