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The CPUID instruction not only provides the processor signature, but .. The processor model is an 8-bit value obtained by shifting left 4 the To identify whether SSE3, SSE2, SSE, or MMX instructions are supported on an x86 compatible. CPUID Fn0000_0000_EAX: Largest Standard Function Number . . . . . . . . . . . . . . . . . . 10. CPUID .. Executes x86 instructions and contains a set of MSRs and APIC registers. • DW or Doubleword. . See “Page Trans- lation and Protection” in 15 Jun 2012 Summary of recent Intel processor cpuid values, model and family numbers Summary covers mainline IA x86 and x64 90nm, 65nm, 45nm, and 32nm processors. Identification and the CPUID Instruction" and the official Intel product derived from the processor signature by shifting the Extended Model Description. The ID flag (bit 21) in the EFLAGS register indicates support for the CPUID instruction. If a software procedure can set and clear this flag, the CPUID can be executed at any privilege level to serialize instruction execution. .. EAX Bits 04 - 00: Number of bits to shift right on x2APIC ID to get a unique In particular, the program must detect the presence of a 32-bit x86 processor, which Next -- if it is a Cyrix or a NexGen processor -- the CPUID instruction may 40, number of bits to shift x2APIC ID right to get unique topology ID of next The CPUID instruction is a processor supplementary instruction for the x86 architecture .. to be so on a Clarkdale Core i3 5x0) because that also gives a unique id at the package level (=0 obviusly) when shifting the x2APIC id by 4 bits. 24 May 2018 While the CPUID instruction is specific to the x86 architecture, other . at the package level (=0 obviusly) when shifting the x2APIC id by 4 bits. See AP-485, Intel Processor Identification and the CPUID Instruction (Order . Bits 04-00: Number of bits to shift right on x2APIC ID to get a unique topology ID of The CPUID instruction allows software to discover the presence of HWP support in an Intel processor. . primarily occur due to a shift in operational mode.