Qualcomm
Qualcomm Incorporated () is an American multinational corporation headquartered in San Diego, California, and Delaware General Corporation Law, incorporated in Delaware. It creates semiconductors, software and services related to wireless techn ...
Krait is an
ARM
In human anatomy, the arm refers to the upper limb in common usage, although academically the term specifically means the upper arm between the glenohumeral joint (shoulder joint) and the elbow joint. The distal part of the upper limb between ...
-based
central processing unit
A central processing unit (CPU), also called a central processor, main processor, or just processor, is the primary Processor (computing), processor in a given computer. Its electronic circuitry executes Instruction (computing), instructions ...
included in the
Snapdragon
''Antirrhinum'' is a genus of plants in the Plantaginaceae family, commonly known as dragon flowers or snapdragons because of the flowers' fancied resemblance to the face of a dragon that opens and closes its mouth when laterally squeezed. They ...
S4 and earlier models of Snapdragon 400/600/800 series
SoC
SOC, SoC, Soc, may refer to:
Science and technology
* Information security operations center, in an organization, a centralized unit that deals with computer security issues
* Selectable output control
* Separation of concerns, a program design pr ...
s. It was introduced in 2012 as a successor to the Scorpion CPU and although it has architectural similarities, Krait is not a
Cortex-A15 core, but it was designed in-house. In 2015, Krait was superseded by the 64-bit
Kryo
Qualcomm Kryo is a series of custom or semi-custom ARM-based CPUs included in the Snapdragon line of SoCs.
These CPUs implement the ARM 64-bit instruction set and serve as the successor to the previous 32-bit Krait CPUs. It was first introduc ...
architecture, first introduced in Snapdragon 820 SoC.
Overview
* 11-stage integer pipeline with 3-way decode and 4-way
out-of-order speculative issue superscalar
A superscalar processor (or multiple-issue processor) is a CPU that implements a form of parallelism called instruction-level parallelism within a single processor. In contrast to a scalar processor, which can execute at most one single in ...
execution
* Pipelined VFPv4 and 128-bit wide
NEON
Neon is a chemical element; it has symbol Ne and atomic number 10. It is the second noble gas in the periodic table. Neon is a colorless, odorless, inert monatomic gas under standard conditions, with approximately two-thirds the density of ...
(
SIMD
Single instruction, multiple data (SIMD) is a type of parallel computer, parallel processing in Flynn's taxonomy. SIMD describes computers with multiple processing elements that perform the same operation on multiple data points simultaneousl ...
)
* 7 execution ports
* 4 KB + 4 KB direct mapped L0
cache
Cache, caching, or caché may refer to:
Science and technology
* Cache (computing), a technique used in computer storage for easier data access
* Cache (biology) or hoarding, a food storing behavior of animals
* Cache (archaeology), artifacts p ...
* 16 KB + 16 KB 4-way set associative L1 cache
* 1 MB (
dual-core
A multi-core processor (MCP) is a microprocessor on a single integrated circuit (IC) with two or more separate central processing units (CPUs), called ''cores'' to emphasize their multiplicity (for example, ''dual-core'' or ''quad-core''). Ea ...
) or 2 MB (quad-core) 8-way set-associative L2 cache
* Dual- or quad-core configurations
* Performance (DMIPS/MHz):
** Krait 200: 3.3 (28 nm LP)
** Krait 300: 3.39
(28 nm LP)
** Krait 400: 3.39 (28 nm HPm)
** Krait 450: 3.51 (28 nm HPm)
See also
*
Scorpion (CPU)
Scorpion is a central processing unit (CPU) core designed by Qualcomm for use in their Snapdragon mobile systems on chips (SoCs). It was released in 2008. It was designed in-house, but has many architectural similarities with the ARM Cortex-A8 a ...
*
Kryo (microarchitecture)
Qualcomm Kryo is a series of custom or semi-custom ARM architecture, ARM-based CPUs included in the Qualcomm Snapdragon, Snapdragon line of system on a chip, SoCs.
These CPUs implement the ARM architecture, ARM 64-bit instruction set and serve as ...
*
Comparison of ARMv7-A cores
This is a comparison of ARM instruction set architecture application processor cores designed by Arm Holdings ( ARM Cortex-A) and 3rd parties. It does not include ARM Cortex-R, ARM Cortex-M, or legacy ARM cores.
ARMv7-A
This is a table c ...
*
List of Qualcomm Snapdragon processors
The Qualcomm Snapdragon suite of System on a chip, systems on chips (SoCs) are designed for use in smartphones, Tablet computer, tablets, laptops, 2-in-1 PCs, smartwatches, and smartbooks devices.
Before Snapdragon
SoC made by Qualcomm before ...
References
External links
Qualcomm's Snapdragon S4 Site
{{Application ARM-based chips
ARM processors
Qualcomm IP cores