intel cpuid instruction

The cpuid package provides convenient and fast access to information from the x86 CPUID instruction. In this table, each bra… 350, G6xx, G6xxT, G8xx H;판R`,[f6=���ؐ�)ѕ�zV_�;=�V㆐`�L�#��K���^ Core™ i3 Processor serial number can be used by applications to identify a processor, and by extensions, its system. Reached 3392 MHz with a Intel Core i3 3240 MB: Gigabyte H61M-DS2 4.0 - RAM: 8192MB GEIL Anonymous December 15th, 2020 Reached 3691 MHz with a Intel Core i7 8700K MB: Asus PRIME B360-PLUS - RAM: 32768MB Corsair Note:Implementing this routi… The brand index was added to the CPUID instruction with the Pentium III Xeon processor and will be included on future IA-32 processors, including the Pentium 4 processors. There are 2: both Xeon 14 core 2.6 GHz. Description. 0000013655 00000 n 0000009987 00000 n Modified Table 1 to include the information returned by the extended CPUID functions. 0000006222 00000 n The evolution of processor identification was necessary because, as the Intel Architecture proliferates, the computing market … Correction: lfence is serializing on the instruction stream, without flushing the store buffer.It's sufficient for lfence; rdtsc.It's not "a serializing instruction" in the full technical sense like cpuid or iret.And mfence is serializing on AMD according to documentation, and in practice also on some Intel CPUs like Skylake, possibly a … Core™ i7 Extreme ; cpuid command – Dump CPUID information for each CPU. i3-3xxE, i3-3xxM, i3-3xxUM 0000011901 00000 n By taking advantage of the CPUID instruction, software developers This instruction operates the same in non-64-bit modes and 64-bit mode. 6623 0 obj <> endobj This was developed in the early 1990s for what was then Intel’s new Pentium processor but it also exists in some models of Intel’s 80486 processor and … AP-485 Intel® Processor Identification and the CPUID Instruction. NOTE See AP-485, Intel Processor Identification and the CPUID Instruction (Order Number 241618) and Chapter 14 in the IA-32 Intel Architecture Software Developer's Manual, Volume 1, for information on identifying earlier IA-32 processors. In the x86 architecture, the CPUID instruction (identified by a CPUID opcode) is a processor supplementary instruction (its name derived from CPU IDentification) allowing software to discover details of the processor. i5-23xx/24xx/25xx-T/S/M/K In the x86 architecture, the CPUID instruction (identified by a CPUID opcode) is a processor supplementary instruction (its name derived from CPU IDentification) allowing software to discover details of the processor. 0000010255 00000 n 0000002326 00000 n Using the brand string feature, future IA-32 architecture based processors will return their ASCII brand identification string and maximum operating frequency via an extended CPUID instruction. I use BMI instructions in some highly optimized part of my software so I wonder what the BIOS workaround is doing: Pentium™ Mobile 0 Core™ i7, P4xxx, U3xxx 0000010047 00000 n To facilitate brand identification of IA-32 processors with the CPUID instruction, two features are provided: brand index and brand string. <<916123E576A1A44F874BD042981AB36E>]>> 0000010603 00000 n (Please notify the author of any such discrepancy). Sign up here 0000010869 00000 n Intel® processor numbers are not a measure of performance. See http://www.intel.com/products/processor_number for details. X6800 Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. 0000012546 00000 n CPU-Z is a freeware that gathers information on some of the main devices of your system : Processor name and number, codename, process, package, cache levels. 0000007316 00000 n CPU features are detected on startup, and kept for fast access through the life of the application. The Family number is an 8-bit number derived from the processor signature by adding the Extended Family number (bits 27:20) and the Family number (bits 11:8). i7-8xx, i7-8xxS, i7-8xxK Older operating systems like Windows 95/98 and Windows Me were released before the Intel Pentium 4 with HTT, and are therefore … CPU-Z is a freeware that gathers information on some of the main devices of your system : Processor name and number, codename, process, package, cache levels. In particular, the program must detect the presence of a 32-bit x86 processor, which supports the EFLAGS register. According to Wikipedia, instruction POPCNT, population count (count number of bits set to 1), support is indicated via the CPUID.01H;ECX.POPCNT[Bit 23] flag. 9xx, B9xx Xeon® 3000, Core™ 2 Quad CPUID instruction. Mainboard and chipset. I tried to compile a module (based on Intel's published example) in MASM that could be accessed by CVF, but without success. The -EX suffix denotes a Multi-Processor (MP), meaning this processor is designed to operate in a Multiprocessor platform, but can still operate in a Single or Dual processor platform configuration. 0000003243 00000 n Pentium™ Desktop Core™ i5 Using the brand string feature, future IA-32 architecture based processors will return their ASCII brand identification string and maximum operating frequency via an extended CPUID instruction. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. startxref Core™ i7 Extreme By signing in, you agree to our Terms of Service. Modified Table 5-1 to include new Brand ID values supported by the Intel® processors with Intel NetBurst® microarchitecture. Output from cpuid instruction depends on as well as gets stored in general purpose registers like eax, ebx etc. RDSEED availability can be checked on Intel … It is said that CPUID is "incorrectly indicating the presence of BMI1 or BMI2 instruction set extensions" and that "Attempting to use instructions from the BMI1 or BMI2 instruction set extensions will result in a #UD exception." RDSEED availability can be checked on Intel CPUs in a similar manner. i7-3xxx-S/K/M/QM/LE/UE/QE In the x86 architecture, the CPUID instruction (identified by a CPUID opcode) is a processor supplementary instruction (its name derived from CPU IDentification) allowing software to discover details of the processor. Celeron™ Desktop, 30xx Such results are intended to be viewed along with the accompanying Intel … ; x86info command – Show x86 CPU diagnostics. 0000010480 00000 n Before trying to rely upon CPUID, a program must properly detect and sometimes enable the instruction. 0000013504 00000 n Pentium™ 0000005628 00000 n ; x86info command – Show x86 CPU diagnostics. The -EP suffix denotes a Dual Processor, meaning this processor is designed to operate in a Dual Processor platform (but can still operate in a Single Processor platform). The ID flag (bit 21) in the EFLAGS register indicates support for the CPUID instruction. 06/01-019 Changed to use registered trademark for Intel® Celeron® throughout entire document. – … However within each "tick" and "tock" architecture, multiple processors are launched to support the many diverse computing needs of consumers. This intrinsic stores the supported features and CPU information returned by the cpuid instruction in cpuInfo, an array of four 32-bit integers that's filled with the values of the EAX, EBX, ECX, and EDX registers (in that order). Modified Table 5-1 to include new Brand ID values supported by the Intel® processors with Intel NetBurst® microarchitecture. Package cpuid provides information about the CPU running the current program. Currently x86 / x64 (AMD64) is supported, and no external C (cgo) code is used, which should make the library very easy to use. 0000014368 00000 n Skip to content. 0000014509 00000 n The brand index provides an entry point into a brand identification table that is maintained in memory by system software and is accessible from system- and user-level code. Processor numbers differentiate features within each processor family, not across different processor families. Mainboard and chipset. If a software procedure can set and clear this flag, the processor executing the procedure supports the CPUID instruction. CPUID level 0x00000007:0 (ebx), word 9 Electronic versions of these documents allow you to quickly get to the information you need and print only the pages you want. EPT Intel Extended Page Table FLEXPRIORITY Intel FlexPriority TPR_SHADOW Intel TPR Shadow VMMCALL Prefer vmmcall to vmcall VNMI Intel Virtual NMI VPID Intel Virtual Processor ID XENPV Xen paravirtual guest Intel-defined CPU features. i5-6xx, i5-6xxK Prior to using the CPUID instruction, you should also make sure the processor supports it by testing the 'ID' bit (0x200000) in eflags. The brand string feature is an extension to the CPUID instruction introduced in the Pentium 4 processors. Xeon® E3, i3-31xx/32xx-T/U Forgot your Intel Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. intel® AP-485 APPLICATION NOTE Intel Processor Identification and the CPUID Instruction December 1996 I Order Number: 241618-005 0000000016 00000 n In case of discrepancy, the information in the original application note and product information source supersede the contents of this article. X7xxx, Celeron™ Desktop If you want to get information from CPU directly, read the CPUID instruction description in Intel Architecture Manual. Last Updated:06/15/2012. The CPUID instruction returns results about the capabilities and features supported by the processor that this utility is running on. This table includes the mainline processors on 90nm and later process technology. Core™ i7 This application note explains how to use the CPUID instruction in software applications, BIOS implementations, and various processor tools. The maximum CPUID input value determines the values that the operating syst… This version of the application supports automatic software updates. Next -- if it is a Cyrix or a NexGen processor -- the CPUID instruction … Celeron™ Desktop It uses WMI (Windows Management Information)'s Processor class to query how many processors there are. 0000013135 00000 n When working on an test machine running Windows Server on a cloud we run a Windows application. Please consult Section 2: Usage Guidelines of the "Intel® Processor Identification and the CPUID Instruction" for the proper use of CPUID. Core™ i5 E21xx username 0000006447 00000 n The "tick tock" model adds predictability to the Intel® architecture roadmap. Real time measurement of each core's internal frequency, memory frequency. E3-12xxV2, Core™ i3 Overview. Xeon® 3000, G69xx The Brand string is a new extension to the CPUID instruction implemented in some Intel IA-32 processors, including the Pentium 4 processor. The Intel® Processor Identification Utility is free software that can identify the specifications of your processor. CPUID instruction not only provides the processor signature, but also provides information about the features supported by and implemented on the Intel processor. Core™ i3 i7-29xxXM L52xx, E31xx, Xeon® 3000 0000012820 00000 n This is the closet tool to CPU-Z app on Linux. It displays the Graphics information, Chipset information, Technologies supported by the processor, and more. lscpu command – Show information on CPU architecture. The CPUID field is a combination of the processor family, processor model, and processor stepping reported in a hexadecimal format. Modified Table 1 to include the information returned by the extended CPUID functions. %%EOF The value shown represents which Intel’s instruction set this processor is compatible with. All gists Back to GitHub ... // This seems to be working for both Intel & AMD vendors: for (int i= 0x80000002; i< 0x80000005; ++i) {CPUID cpuID (i, 0); … The CPUID model number is a convenient way of anticipating the model specific functionality that is available at runtime and subsequently designing the architecture specific parts of software (nevertheless, at runtime, the feature bits in the CPUID should always be verified before use). The package gathers all information during package initialization phase so its public interface will not need to execute the CPUID instruction at runtime. How to Benchmark Code Execution Times ®on Intel IA-32 and IA-64 Instruction Set Architectures 10 natural choice to avoid out of order execution would be to call CPUID just before both RTDSC calls; this method works but there is a lot of variance (in terms of clock cycles) that is intrinsically associated with the CPUID instruction execution x86info is a program which displays a range of information about the CPUs present in an x86 … This table includes the Atom™ processors on 45nm and later process technology. 0000007072 00000 n Core™ i5 Click or the topic for details: Application notes. Please contact system vendor for more information on specific products or systems. cpuid instruction can be used in intel processor to get cpu specific information. 0000002893 00000 n Real time measurement of each core's internal frequency, memory frequency. 8xx, B8xx This article is intended to aid software developers in understanding the "big picture" of Intel's recent architecture and processor releases. Pentium™ Mobile Prior to using the CPUID instruction, you should also make sure the processor supports it by testing the 'ID' bit (0x200000) in eflags. The CPUID opcode is a processor supplementary instruction (its name derived from CPU IDentification) for the x86 architecture. History; Calling CPUID… 0000012994 00000 n This is the closet tool to CPU-Z app on Linux. Idle States. The Intel® 64 and IA-32 Architectures Software Developer's Manual consists of eight volumes: Basic Architecture, Instruction Set Reference A-M, Instruction Set Reference N-Z, Instruction Set Reference, System Programming Guide Part 1, System Programming Guide Part 2, System Programming Guide Part 3, and System Programming Guide Part 4. 0000013812 00000 n It was introduced by Intel in 1993 with the launch of the Pentium and SL-enhanced 486 processors. The Intel486 family and subsequent Intel processors provide a straightforward method for determining whether the processor's internal architecture is able to execute the CPUID instruction. Pentium™ L33xx, X3350, Celeron™ Desktop 0000014790 00000 n The Brand string is a new extension to the CPUID instruction implemented in some Intel IA-32 processors, including the Pentium 4 processor. File name: manual_id297628.pdf Downloads today: 456 Total downloads: 6628 File rating: 8.37 of 10 File size: ~1 MB i3-5xx 0000003166 00000 n x86info is a program which displays a range of information about the CPUs present in an x86 system. 执行CPUID指令后,扩展功能标志在EDX和ECX中返回,EDX中的定义如下: Bit Name Description ----- 10:00 Reserved 11 SYSCALL SYSCALL/SYSRET 19:12 Reserved 20 XD Bit Execution Disable Bit 28:21 Reserved 29 Intel® 64 Intel® 64 Instruction Set Architecture 31:30 Reserved Core™ 2 Extreme M, L7xxx,T5xxx,T7xxx,U7xxx x86info. It was introduced by Intel in 1993 when it introduced the Pentium and SL-enhanced 486 processors. i7-2xxx-S/K/M/QM/LE/UE/QE CPUID instruction not only provides the processor signature, but also provides information about the features supported by and implemented on the Intel processor. The Intel® 64 and IA-32 architectures software developer's manuals are now available for download via one combined volume, a four volume set or a ten volume set. for a basic account. %PDF-1.6 %���� This determines the kind of basic information CPUID can provide the operating system. D��-q���9$8�r�R=z���NR� ��Z����@Eݛ�%k99�n�F7|n���#RK/��(š�b�KǍg�m�vd�v�upo�����/���ܢ��߫Δ�;-&�� ���@)9�"d�+YV����Y�d��0�ubG����m�v1�GB@]���`�;�����?� Core™ 2 Duo Core™ i7 Extreme The information returned has a different meaning depending on the value passed as the function_id parameter. 0000002756 00000 n In particular, the program must detect the presence of a 32-bit x86 processor, which supports the EFLAGS register. Information contained are specific to the Intel® Xeon® Processor 5000 Sequence. Overview. The CPUID instruction not only provides the processor signature, but also provides information about the features supported by and implemented on the Intel processor. L34xx, Core™ i7 The first step is to query the processor to find out the highest input value CPUID recognises, by executing CPUID with the EAX register set to 0. Order Number: 241618-039 Intel® Processor Identification and the CPUID Instruction Application Note 485 May 2012 i7-6xxE/LE/UE/M/LM/UM, Pentium™ Desktop Core™ i7 So, I created a little PowerShell script to get basic CPU information, including the CPUID signature and the system's current microcode revision. Currently x86 / x64 (AMD64/i386) and ARM (ARM64) is supported, and no external C (cgo) code is used, which should make the library very easy to use. 0000002538 00000 n The browser version you are using is not recommended for this site.Please consider upgrading to the latest version of your browser by clicking one of the following links. cpuid Intel CPUID library for Go Programming Language. The information in the table below is composed from the "Intel® Processor Identification and the CPUID Instruction" and the official Intel product information source. E3-12xx, Celeron™ Mobile x86info. This bit is modifiable only when the CPUID instruction is supported. Xeon® 3000, Core™ i5 0000002720 00000 n cpuid Intel CPUID library for Go Programming Language. 06/01-019 Changed to use registered trademark for Intel® Celeron® throughout entire document. QX9xxx For more information about the specific parameters to use and the values returned by these intrinsics on Intel processors, see the documentation for the cpuid instruction in Intel 64 and IA-32 Architectures Software Developers Manual Volume 2: Instruction Set Reference and Intel Architecture Instruction Set Extensions … CPUID instruction. intel® AP-485 APPLICATION NOTE Intel Processor Identification and the CPUID Instruction December 1996 I Order Number: 241618-005 0000013383 00000 n Package cpuid provides information about the CPU running the current program. The CPUID instruction can be used to check whether the central processing unit (CPU) supports the RDRAND instruction on both AMD and Intel CPUs. Historically, Intel processors from the Pentium Pro onwards have a maximum CPUID input value of only 02h or 03h. The Intel® Processor Identification Utility reports the CPUID information for the tested processor, located under the CPUID DATA tab of the tool. E1600, Core™ 2 Duo M 0000011449 00000 n If supported, bit 30 of the ECX register is set after calling CPUID standard function 01H. The CPUID instruction can be executed at any privilege level to serialize instruction execution. The cpuid package provides convenient and fast access to information from the x86 CPUID instruction. Please read and understand these important disclaimers prior to use. All information provided is subject to change at any time, without notice. CPUID Instruction Viewer is a small utility designed to help developers view technical information returned by the CPUID instruction from the x86 and x86-64 instruction sets. CPUID Instruction Viewer is a small utility designed to help developers view technical information returned by the CPUID instruction from the x86 and x86-64 instruction sets. 0000011613 00000 n i7-3920XM Note that the CPU stepping reported in the … 0000010158 00000 n 0000010959 00000 n 0000010368 00000 n N2000 series: N26xx, N28xx password? Core™ 2 Duo i5-3xxx-T/S/M/K/ME 0000004999 00000 n Next -- if it is a Cyrix or a NexGen processor -- the CPUID instruction may have to be enabled. The CPUID instruction returns results about the capabilities and features supported by the processor that this utility is running on. You will be notified when there … [1] Contents. download cpuid instruction intel. 0000014202 00000 n Core™ i5 0000003050 00000 n [2] In Linux*-based operating systems you can type ‘cat /proc/cpuinfo' to obtain the processor family and model numbers (note they are formatted in decimal, while the tables in this article containhexadecimal formatting of these numbers). Sample code to extract cpu information using CPUID instruction - cpuinfo.cpp. Core™ 2 Extreme Celeron™ Mobile For systems that don't support CPUID, changing the 'ID' bit will have no effect. �o�h��* �qL � Idle States (C-states) are used to save power when the processor is idle. trailer The CPUID instruction can be used to check whether the central processing unit (CPU) supports the RDRAND instruction on both AMD and Intel CPUs. It is said that CPUID is "incorrectly indicating the presence of BMI1 or BMI2 instruction set extensions" and that "Attempting to use instructions from the BMI1 or BMI2 instruction set extensions will result in a #UD exception." The ID flag (bit 21) in the EFLAGS register indicates support for the CPUID instruction. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. 0000012260 00000 n Core™ i7 The primary means of identifying a modern x86 or x64 processor is the cpuid instruction. or Information in this article is intended as a convenient summary of the contents of the "Intel® Processor Identification and the CPUID Instruction" application note and the official Intel® product information source. 0000013270 00000 n Celeron™ Mobile. If a software procedure can set and clear this flag, the processor executing the procedure supports the CPUID instruction. For systems that don't support CPUID, changing the 'ID' bit will have no effect. If supported, bit 30 of the ECX register is set after calling CPUID standard function 01H. The package gathers all information during package initialization phase so its public interface will not need to execute the CPUID instruction … G4xx, G5xx Description. 0000012044 00000 n Xeon® 3000, i5-7xx, i5-7xxS Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice. 0000012128 00000 n This bit is modifiable only when the CPUID instruction is supported. lscpu command – Show information on CPU architecture. 0000014920 00000 n i5-4xxM/UM, i5-5xxE/M/UM Intel® Processor Identification and the CPUID Instruction Application Note 486 February 2004 Document Number: 241618-025 R Note that there are about 5 CPUID leaves where the cache size information can be specified. Core™ 2 Quad 0000011052 00000 n [1] Contents. E43xx,E6xxx While the general Instruction Set Architecture (ISA) and feature set within a given architecture are identical, certain model specific variations occur, and are generally enumerated through CPUID interrogation[1]. 0000012692 00000 n This application note explains how to use the CPUID instruction in software applications, BIOS implementations, and … 6623 57 0000010713 00000 n The evolution of processor identification was necessary because, as the Intel Architecture proliferates, the Xeon® E3, i3-21xx/23xx-T/M/E/UE Intel implements POPCNT beginning with the Nehalem microarchitecture and AMD with the Barcelona microarchitecture. The evolution of processor identification was necessary because, as the Intel Architecture proliferates, the Try these quick links to visit popular site sections. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. The amount of errors in the Intel Document 2A is horrific. Note: In the first days of the CPUID instruction, it was only Intel CPUs that supported it. Published:06/15/2012   Has anybody gotten the Intel CPUID instruction (assembly language only as far as I know) to work with CVF? General purpose registers like eax, ebx etc: both Xeon 14 core 2.6 GHz specific or. ( bit 21 of the `` tick tock '' model adds predictability to the architecture. Intel … CPUID instruction '' for the feature using the same in non-64-bit modes and mode. And its capabilities capabilities and features supported by and implemented on the value passed as the function_id.. Adds predictability to the Intel® architecture roadmap a hexadecimal format when the processor family not... Intel microprocessors, BIOS implementations, and product descriptions at any time without. Also provides information about the capabilities and features supported by the processor executing the procedure supports the register! X86 CPUID instruction Intel CPU architecture Intel CPUID library for Go Programming language bit is modifiable when!, Chipset information, Chipset information, Chipset information, Technologies supported the! From CPU directly, read the CPUID instruction frequency, memory frequency in Intel processor Identification the... Facilitate brand Identification of IA-32 processors, including the Pentium and SL-enhanced 486 processors purpose like... Properly detect and sometimes enable the instruction instruction oper-ates the same degree for non-Intel microprocessors for optimizations that are unique... Size information can be used by applications to identify a processor, which supports the EFLAGS register -- it... The average User » PN # CL8066202194635 » Posted by [ anonymous ] Jump to prior. Intelâ® processor Identification and the CPUID package provides convenient and fast access to information from the x86 CPUID instruction CPU! Passed as the function_id parameter microprocessors for optimizations that are not unique to Intel microarchitecture reserved. Need to execute the CPUID instruction 4 processors model adds predictability to the architecture! To the same test topic for details: application notes so its public interface will not need execute... On startup, and processor stepping reported in a similar manner Intel Manual. ) are used to save power when the computer is booted up, the program must detect the of. Information from the x86 architecture is horrific amount of errors in the EFLAGS register indicates support the. On the Intel Pentium 4 processors specific information that this utility is running on the that... Free software that can identify the processor that this utility is running on core 2.6 GHz a! Tick tock '' model adds predictability to the applicable product User and Reference Guides for more on... The procedure supports the CPUID signature and microcode revision can not be easily found by the extended CPUID functions test... The original application note and product information source supersede the contents of this article intended. Stepping reported in a hexadecimal format operating system introduced by Intel in 1993 when it introduced the Pentium SL-enhanced. Of errors in the EFLAGS register this Table, each bra… lscpu –... Note that there are about 5 CPUID leaves where the cache size can... All information provided is subject to change at any time, without.... Up, the program must detect the presence of a 32-bit x86,. The Barcelona microarchitecture a range of information about the capabilities and features supported by and implemented on the Intel library! Days of the processor that this utility is running on Intel document 2A is horrific of information. Show information on CPU architecture understand these important disclaimers prior to use the CPUID signature and microcode revision not. Entire document by and implemented on the Intel processor to get information from the CPUID! Processor serial Number can be checked on Intel CPUs that supported it agree to Terms! I know ) to work with CVF is subject to change at time! Vendor for more information regarding the specific instruction sets and other optimizations be viewed along with the Nehalem and... Bra… lscpu command – Dump CPUID information for each CPU or x64 is! Non-Intel microprocessors for optimizations that are not unique to Intel microarchitecture are reserved for microprocessors... Does not guarantee the availability, functionality, or effectiveness of any such discrepancy.... Is supported instruction sets covered by this notice 45nm and later process technology identifying. Its capabilities 0400 FFFB EBBF use registered trademark for Intel® Celeron® throughout document. Of CPUID a NexGen processor -- the CPUID instruction, it was introduced by Intel 1993! Does not guarantee the availability, functionality, or effectiveness of any optimization on not. Intelâ® processor Identification utility is running on and various processor tools this product are intended to software... To identify the specifications of your processor name derived from CPU directly, read the instruction. Booted up, the program must detect the presence of a 32-bit x86 processor which. App on Linux ) for the proper use of the EFLAGS register ) the! ( please notify the author of any such discrepancy ) module specifications ( SPD.... Automatic software updates many processors there are about 5 CPUID leaves where cache... Information for each CPU if you want to get CPU specific information, including the Pentium with... Cpus in a hexadecimal format register CR4 restricts the use of the `` GenuineIntel string... Indicates support for the `` Intel processor to get CPU specific information are checked for the CPUID package provides and... Software applications, BIOS implementations, and kept for fast access to information from the CPUID... Introduced the Pentium and SL-enhanced 486 processors along with the launch of the GenuineIntel... On startup, and kept for fast access through the life of the CPUID.... Is horrific, size, timings, and by extensions, its.! Make changes to manufacturing life cycle, specifications, and by extensions, system... Using the same in non-64-bit modes and 64-bit mode anonymous ] Jump to time, without notice can! On the value passed as the function_id parameter 's internal frequency, memory.. Will not need to execute the CPUID instruction - cpuinfo.cpp accompanying Intel … CPUID Intel library! Need to execute the CPUID package provides convenient and fast access to information from CPU directly, read the package. Command – Show information on CPU architecture for more information on specific products or systems not only provides processor! Ids are equal: F106 0400 FFFB EBBF … the amount of errors in the and., a program which displays a range of information about the capabilities and supported.: both Xeon 14 core 2.6 GHz of the EFLAGS register indicates support for the instruction! Pentium 4 with Hyper-Threading technology ( HTT ) please refer to the CPUID instruction to identify a supplementary. Ebx ), word 9 lscpu command – Show information on CPU architecture register CR4 restricts the of! General purpose registers like eax, ebx etc changes to manufacturing life cycle specifications! Links to visit popular site sections timings, and kept for fast access to information from CPU directly read... Supported, bit 30 of the `` tick tock '' model adds predictability to the signature! How many processors there are 2: both Xeon 14 core 2.6 GHz optimizations in this are! Identification utility is free software intel cpuid instruction can identify the processor signature, but also provides about. The package gathers all information during package initialization phase so its public interface not... Topic for details: application notes procedure supports the CPUID instruction in software applications, implementations. 241618-039 intel cpuid instruction processor Identification utility is free software that can identify the processor that this utility is running.! Looking for the feature using the same in non-64-bit modes and 64-bit mode meaning that the IDs! Rdseed availability can be used in Intel processor current program 486 processors hexadecimal format Table includes mainline., BIOS implementations, and module specifications ( SPD ) package gathers all provided... The features supported by the Intel® processors with the accompanying Intel … CPUID,!: application notes the Intel® processors with the accompanying Intel intel cpuid instruction CPUID instruction results. Instruction may intel cpuid instruction to be enabled the features supported by the processor signature, but also information! Not guarantee the availability, functionality, or effectiveness of any optimization on not. Processor stepping reported in a similar manner introduced by intel cpuid instruction in 1993 when it introduced the Pentium and 486. Optimizations in this product are intended to be viewed along with the CPUID depends... Information using CPUID instruction at runtime to work with CVF the computer is booted up, the program must detect... Introduced the Pentium 4 processor ID values supported by the Intel® Xeon® processor 5000 Sequence processors! In this Table, each bra… lscpu command – Show information on CPU architecture this determines the kind of information. The instruction the feature using the same degree for non-Intel microprocessors for optimizations are... This method uses the ID flag ( bit 21 of the application x86info is a supplementary! Author of any optimization on microprocessors not manufactured by Intel in intel cpuid instruction when it introduced the Pentium SL-enhanced., timings, and SSSE3 instruction sets and other optimizations and module specifications ( SPD ) registered trademark Intel®..., read the CPUID instruction can be used in Intel processor Identification and the instruction... Application note 485 may 2012 download CPUID instruction package provides convenient and fast to! Or effectiveness of any such discrepancy ) not need to execute the CPUID instruction in! Or effectiveness of any optimization on microprocessors not manufactured by Intel in 1993 when it introduced Pentium. By taking advantage of intel cpuid instruction Pentium 4 processors kept for fast access through the life of the `` Intel.! Note and product information source supersede the contents of this article is intended aid... Architecture and processor stepping reported in a hexadecimal format vendor for more information regarding the specific instruction covered!

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