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ARM Cortex-A17
The ARM Cortex-A17 is a 32-bit processor core implementing the ARMv7-A architecture, licensed by ARM Holdings. Providing up to four cache-coherent cores, it serves as the successor to the Cortex-A9 and replaces the previous ARM Cortex-A12 specifications. ARM claims that the Cortex-A17 core provides 60% higher performance than the Cortex-A9 core, while reducing the power consumption by 20% under the same workload. ARM renamed Cortex-A12 to a variant of Cortex-A17 since the second revision of the A12 core in early 2014, because these two were indistinguishable in performance and all features available in the A17 were used as upgrades in the A12. New features of the Cortex-A17 specification, not found in the Cortex-A9 specification, are all improvements from the third-generation ARM Cortex-A, which also includes the Cortex-A7 and Cortex-A15: * Hardware virtualization and 40-bit Large Physical Address Extensions (LPAE) addressing * Full-system coherency, bringing support for t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ARM Holdings
Arm is a British semiconductor and software design company based in Cambridge, England. Its primary business is in the design of ARM processors (CPUs). It also designs other chips, provides software development tools under the DS-5, RealView and Keil brands, and provides systems and platforms, system-on-a-chip (SoC) infrastructure and software. As a "holding" company, it also holds shares of other companies. Since 2016, it has been owned by Japanese conglomerate SoftBank Group. While ARM CPUs first appeared in the Acorn Archimedes, a desktop computer, today's systems include mostly embedded systems, including ARM CPUs used in virtually all smartphones. Systems such as iPhones and Android smartphones frequently include many chips, from many different providers, that include one or more licensed Arm cores, in addition to those in the main Arm-based processor. Arm's core designs are also used in chips that support all the most common network-related technologies. Pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Floating-point
In computing, floating-point arithmetic (FP) is arithmetic that represents real numbers approximately, using an integer with a fixed precision, called the significand, scaled by an integer exponent of a fixed base. For example, 12.345 can be represented as a base-ten floating-point number: 12.345 = \underbrace_\text \times \underbrace_\text\!\!\!\!\!\!^ In practice, most floating-point systems use base two, though base ten ( decimal floating point) is also common. The term ''floating point'' refers to the fact that the number's radix point can "float" anywhere to the left, right, or between the significant digits of the number. This position is indicated by the exponent, so floating point can be considered a form of scientific notation. A floating-point system can be used to represent, with a fixed number of digits, numbers of very different orders of magnitude — such as the number of meters between galaxies or between protons in an atom. For this reason, floating-p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of ARM Cores
This is a list of central processing units based on the ARM family of instruction sets designed by ARM Ltd. and third parties, sorted by version of the ARM instruction set, release and name. In 2005, ARM provided a summary of the numerous vendors who implement ARM cores in their design. Keil also provides a somewhat newer summary of vendors of ARM based processors. ARM further provides a chart displaying an overview of the ARM processor lineup with performance and functionality versus capabilities for the more recent ARM core families. Processors Designed by ARM Designed by third parties These cores implement the ARM instruction set, and were developed independently by companies with an architectural license from ARM. Timeline The following table lists each core by the year it was announced. See also * Comparison of ARMv7-A processors * Comparison of ARMv8-A processors This is a table of 64/32-bit central processing units which implement the ARMv8-A instructi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Applications Of ARM Cores
This is a list of products using processors (i.e. central processing units) based on the ARM architecture family, sorted by generation release and name. __TOC__ List of products } , Broadcom BCM2837: '' Raspberry Pi 3'', HiSilicon Kirin Series: ''See List of HiSilicon Kirin SoC'', Mediatek MT Series : ''See List of Mediatek MT SoC, Qualcomm Snapdragon Series: ''See List of Qualcomm Snapdragon SoC'' , - !Cortex-A55 , Samsung: Exynos 850, UNISOC: SC9863, SC9863A , , - !Cortex-A57 , AMD: Opteron A1100-series,NXP: QorIQ LS20xx,Nvidia: Tegra X1 and Tegra X2,Qualcomm: Snapdragon 808 & 810,Samsung: Exynos 7 5433, 7420,HiSilicon: Kirin Hi1610 and Hi1612 , , - ! Cortex-A72 , HiSilicon Kirin 950, 955, Kunpeng 916,MediaTek MT6797, MT8173, MT8176, MT8693,MStar 6A938,Qualcomm Snapdragon 650, 652, 653,Rockchip RK3399,NXP QorIQ LS2088, QorIQ LS1046A, QorIQ LX2160A, QorIQ LS1028A, i.MX8 , RK3399Boardcon EM3399 SBCbr /> Broadcom BCM2711: Raspberry Pi 4'' , - ! Cortex- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comparison Of ARMv8-A Cores
This is a comparison of processors based on the ARM family of instruction sets designed by ARM Holdings and 3rd parties, sorted by version of the ARM instruction set, release and name. ARMv6 ARMv7-A This is a table comparing central processing units which implement the ARMv7-A (A means Application) instruction set architecture and mandatory or optional extensions of it, the last AArch32. {, class="wikitable sortable" style="text-align:center; font-size:94%" !Core!!Decodewidth!!Executionports!!Pipelinedepth!!Out-of-order execution!! FPU!!PipelinedVFP!!FPUregisters!!NEON(SIMD)!!big.LITTLErole!!Virtualization!! Processtechnology!!L0cache!!L1cache!!L2cache!!Coreconfigurations!!Speedpercore( DMIPS/ MHz)!!ARM part number(in the main ID register) , - !ARM Cortex-A5 , , , , , 8, , , , , , , , , , , , 40/28 nm , , , 4–64 KiB / core, , , 1, 2, 4 , 1.57 , 0xC05 , - !ARM Cortex-A7 , , , 5 , , 8, , , , , , , , , , , , 40/28 nm , , , 8–64 KiB / ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comparison Of ARMv7-A Cores
This is a comparison of processors based on the ARM family of instruction sets designed by ARM Holdings and 3rd parties, sorted by version of the ARM instruction set, release and name. ARMv6 ARMv7-A This is a table comparing central processing units which implement the ARMv7-A (A means Application) instruction set architecture and mandatory or optional extensions of it, the last AArch32. {, class="wikitable sortable" style="text-align:center; font-size:94%" !Core!!Decodewidth!!Executionports!! Pipelinedepth!! Out-of-order execution!!FPU!!PipelinedVFP!!FPUregisters!!NEON(SIMD)!!big.LITTLErole!!Virtualization!! Processtechnology!!L0cache!!L1cache!!L2cache!!Coreconfigurations!!Speedpercore( DMIPS/ MHz)!!ARM part number(in the main ID register) , - !ARM Cortex-A5 , , , , , 8, , , , , , , , , , , , 40/28 nm , , , 4–64 KiB / core, , , 1, 2, 4 , 1.57 , 0xC05 , - ! ARM Cortex-A7 , , , 5 , , 8, , , , , , , , , , , , 40/28 nm , , , 8–64 K ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Out-of-order Execution
In computer engineering, out-of-order execution (or more formally dynamic execution) is a paradigm used in most high-performance central processing units to make use of instruction cycles that would otherwise be wasted. In this paradigm, a processor executes instructions in an order governed by the availability of input data and execution units, rather than by their original order in a program. In doing so, the processor can avoid being idle while waiting for the preceding instruction to complete and can, in the meantime, process the next instructions that are able to run immediately and independently. History Out-of-order execution is a restricted form of data flow computation, which was a major research area in computer architecture in the 1970s and early 1980s. The first machine to use out-of-order execution was the CDC 6600 (1964), designed by James E. Thornton, which uses a scoreboard to avoid conflicts. It permits an instruction to execute if its source operand (read ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Instruction Pipeline
In computer engineering, instruction pipelining or ILP is a technique for implementing instruction-level parallelism within a single processor. Pipelining attempts to keep every part of the processor busy with some instruction by dividing incoming instructions into a series of sequential steps (the eponymous " pipeline") performed by different processor units with different parts of instructions processed in parallel. Concept and motivation In a pipelined computer, instructions flow through the central processing unit (CPU) in stages. For example, it might have one stage for each step of the von Neumann cycle: Fetch the instruction, fetch the operands, do the instruction, write the results. A pipelined computer usually has "pipeline registers" after each stage. These store information from the instruction and calculations so that the logic gates of the next stage can do the next step. This arrangement lets the CPU complete an instruction on each clock cycle. It is common f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SIMD
Single instruction, multiple data (SIMD) is a type of parallel processing in Flynn's taxonomy. SIMD can be internal (part of the hardware design) and it can be directly accessible through an instruction set architecture (ISA), but it should not be confused with an ISA. SIMD describes computers with multiple processing elements that perform the same operation on multiple data points simultaneously. Such machines exploit data level parallelism, but not concurrency: there are simultaneous (parallel) computations, but each unit performs the exact same instruction at any given moment (just with different data). SIMD is particularly applicable to common tasks such as adjusting the contrast in a digital image or adjusting the volume of digital audio. Most modern CPU designs include SIMD instructions to improve the performance of multimedia use. SIMD has three different subcategories in Flynn's 1972 Taxonomy, one of which is SIMT. SIMT should not be confused with software thr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NEON (instruction Set)
ARM (stylised in lowercase as arm, formerly an acronym for Advanced RISC Machines and originally Acorn RISC Machine) is a family of reduced instruction set computer (RISC) instruction set architectures for computer processors, configured for various environments. Arm Ltd. develops the architectures and licenses them to other companies, who design their own products that implement one or more of those architectures, including system on a chip (SoC) and system on module (SOM) designs, that incorporate different components such as memory, interfaces, and radios. It also designs cores that implement these instruction set architectures and licenses these designs to many companies that incorporate those core designs into their own products. There have been several generations of the ARM design. The original ARM1 used a 32-bit internal structure but had a 26-bit address space that limited it to 64 MB of main memory. This limitation was removed in the ARMv3 series, which ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
L2 Cache
A CPU cache is a hardware cache used by the central processing unit (CPU) of a computer to reduce the average cost (time or energy) to access data from the main memory. A cache is a smaller, faster memory, located closer to a processor core, which stores copies of the data from frequently used main memory locations. Most CPUs have a hierarchy of multiple cache levels (L1, L2, often L3, and rarely even L4), with different instruction-specific and data-specific caches at level 1. The cache memory is typically implemented with static random-access memory (SRAM), in modern CPUs by far the largest part of them by chip area, but SRAM is not always used for all levels (of I- or D-cache), or even any level, sometimes some latter or all levels are implemented with eDRAM. Other types of caches exist (that are not counted towards the "cache size" of the most important caches mentioned above), such as the translation lookaside buffer (TLB) which is part of the memory management unit (MMU) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Large Physical Address Extensions
ARM (stylised in lowercase as arm, formerly an acronym for Advanced RISC Machines and originally Acorn RISC Machine) is a family of reduced instruction set computer (RISC) instruction set architectures for computer processors, configured for various environments. Arm Ltd. develops the architectures and licenses them to other companies, who design their own products that implement one or more of those architectures, including system on a chip (SoC) and system on module (SOM) designs, that incorporate different components such as memory, interfaces, and radios. It also designs cores that implement these instruction set architectures and licenses these designs to many companies that incorporate those core designs into their own products. There have been several generations of the ARM design. The original ARM1 used a 32-bit internal structure but had a 26-bit address space that limited it to 64 MB of main memory. This limitation was removed in the ARMv3 series, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
