Processor implementation device including transcendental function calculation

A technology of transcendental functions and processors, applied in the fields of electrical digital data processing, digital data processing components, and calculations, it can solve problems such as slow speed, inability to meet fast solutions, and inability to meet calculation speed requirements, and achieve the effect of fast calculation.

Inactive Publication Date: 2011-06-29
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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Problems solved by technology

Due to the use of software to solve the transcendental function, its speed is slow, so it cannot meet the occasions that require high calculation spe...

Method used

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  • Processor implementation device including transcendental function calculation
  • Processor implementation device including transcendental function calculation
  • Processor implementation device including transcendental function calculation

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Embodiment Construction

[0014] Such as figure 1 As shown, a processor implementing device including transcendental function calculation, sequentially consists of a fetching stage, an execution stage and a write-back stage to form a three-stage pipeline architecture.

[0015] The access stage is composed of an address generator and a first data register, and is used to generate the address required for the look-up table in the address generator according to the control signal and input data, and control signals required for the execution stage and the write-back stage, The transformed input data and address signals are sent to the execution stage for calculation.

[0016] The execution level is composed of tab0, tab1, two multiplication and addition modules and the second data register, and is mainly used to complete the calculation of 1 / x, sqrt(x) and ln(x). Among them, tab0 contains five tables rec_tab, rec2_tab, sqr_tab, recsqr_tab and ln_tab for query. Tab1 includes four tables arctg_tab0, arctg...

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Abstract

A processor implementation device including transcendental function calculation belongs to the technical field of digital signal processor, and aims to provide hardware capable of quickly achieving calculation of fixed-point arc tangent value, floating-point reciprocal, floating-point natural logarithm and floating-point evolution. The hardware circuit is a three-stage pipeline architecture sequentially consisting of a fetching stage including an address generator and a first data register, an execution stage including tab0, tab1, two multiplication-addition modules and a second data register, and a write back stage including a truncation module and a mark generation module, wherein the fetching stage is used for generating addresses for looking up tables, and registering and transmitting control signals desired for the execution stage and the write back stage, the transformed input data and an address signal to the execution stage for calculation; the execution stage is used for calculating the fixed-point arc tangent value, floating-point reciprocal, floating-point natural logarithm and floating-point evolution; and the write back stage is used for generating the mark, and truncating and outputting the operation result.

Description

technical field [0001] The invention relates to a processor realization device including transcendental function calculation, which belongs to the technical field of digital signal processors. Background technique [0002] At present, the calculation of transcendental functions by computer is usually realized by software. Due to the use of software to solve the transcendental function, its speed is slow, so it cannot meet the occasions that require high calculation speed, especially the transcendental functions such as logarithmic and inverse trigonometric functions in the field of digital signal processing. Quick solution. Contents of the invention [0003] The purpose of the present invention is to provide a processor implementation device including transcendental function calculation that can quickly realize the calculation of fixed-point arctangent, floating-point reciprocal, floating-point natural logarithm and floating-point square root. [0004] Its technical solu...

Claims

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Application Information

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IPC IPC(8): G06F7/544
Inventor 刘小明洪一宋何娟龚晓华钟小艳
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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