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mango/arch/x86_64/acpi/apic_ctrl.S

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ArmAsm
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.global check_apic
.type check_apic, @function
check_apic:
push %rbp
mov %rsp, %rbp
push %rbx
mov $1, %rax
cpuid
andl $0x200, %edx
shr $9, %edx
mov %rdx, %rax
pop %rbx
pop %rbp
ret