Scalar processors represent the simplest class of computerprocessors.[1] A scalar processor processes one data item at a time (typical data items being integers or floating point numbers). In a vector processor, by contrast, a single instruction operates simultaneously on multiple data items. The difference is analogous to the difference between scalar and vector arithmetic. A Lego RCX Computer is an example of an embedded computer used to control mechanical devices. ... Microprocessors, including an Intel 80486DX2 and an Intel 80386. ... In computer science, the term integer is used to refer to any data type which can represent some subset of the mathematical integers. ... A floating-point number is a digital representation for a number in a certain subset of the rational numbers, and is often used to approximate an arbitrary real number on a computer. ... A vector processor, or array processor, is a CPU design that is able to run mathematical operations on multiple data elements simultaneously. ... In mathematics, scalars are components of vector spaces (and modules), usually real numbers, which can be multiplied into vectors by scalar multiplication. ... In physics and in vector calculus, a spatial vector is a concept characterized by a magnitude, which is a scalar, and a direction (which can be defined in a 3-dimensional space by the Euler angles). ...
An instruction pipeline is a technique used in the design of microprocessors and other digital electronic devices to increase their performance. ... Parallel computing is the simultaneous execution of the same task (split up and specially adapted) on multiple processors in order to obtain results faster. ... A superscalar CPU architecture implements a form of parallelism on a single chip, thereby allowing the system as a whole to run much faster than it would otherwise be able to at a given clock speed. ...
Notes
↑ The processors in question may be complete central processing units (CPUs) or separate arithmetic-logic units (ALUs). In some cases, a processor may be made up of one CPU and several ALUs, the combination forming a superscalar processor.
The vector/scalar processor data transfer register appears to be a high speed memory to the scalarprocessor, and only the data transfer instruction from the floating point register and the fixed point register is aded to the scalar instruction architecture as a basic operation.
In the vectorprocessor, it is not guaranteed that the instructions are executed in the order of their appearance because of reversal of the order of execution of the vector instructions and the indefinite length of the operation time.
As the scalar instruction is decoded by the decoder 2, the scalar instruction other than the post and wait instructions instructs the initiation of the scalar processing to the logic circuits in the scalarprocessor through a path 21 without checking the control condition for decoding the instruction, such as SCR.
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