An Optimized Cell BE Special Function Library Generated by Coconut

Anand, Christopher Kumar; Kahl, Wolfram

doi:10.1109/tc.2008.223

Cited by 9 publications

(8 citation statements)

References 11 publications

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“…A table-lookup is expensive. Although inregister table lookup is reported fast on Cell BE SPU [12], it is substantially slower than polynomial evaluation without any table lookup, within the scope of our tests. Most vector extensions do not provide 64-bit integer multiplication or a vector shift operator with which each element of a vector can be specified a different number of bits to shift.…”

Section: Overview Of Library Implementationmentioning

confidence: 78%

SLEEF: A Portable Vectorized Library of C Standard Mathematical Functions

Shibata

Petrogalli

2020

IEEE Trans. Parallel Distrib. Syst.

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In this paper, we present techniques used to implement our portable vectorized library of C standard mathematical functions written entirely in C language. In order to make the library portable while maintaining good performance, intrinsic functions of vector extensions are abstracted by inline functions or preprocessor macros. We implemented the functions so that they can use sub-features of vector extensions such as fused multiply-add, mask registers and extraction of mantissa. In order to make computation with SIMD instructions efficient, the library only uses a small number of conditional branches, and all the computation paths are vectorized. We devised a variation of the Payne-Hanek argument reduction for trigonometric functions and a floating point remainder, both of which are suitable for vector computation. We compare the performance of our library to Intel SVML. Index Terms-Parallel and vector implementations, SIMD processors, elementary functions, floating-point arithmetic ✦ 1. https://unity3d.com/.

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Section: Overview Of Library Implementationmentioning

confidence: 78%

SLEEF: A Portable Vectorized Library of C Standard Mathematical Functions

Shibata

Petrogalli

2020

IEEE Trans. Parallel Distrib. Syst.

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“…First, to test accuracy, our existing Cell/B.E. functional interpreter, see [13], was extended to include the new instructions. Second, we simulated the log lookups and fmaX using logical operations on bits, that is, a hardware simulation without timing, and verified that the results match the interpreter.…”

Section: Discussionmentioning

confidence: 99%

A Domain-Specific Architecture for Elementary Function Evaluation

Sharma

Anand²

2015

International Journal of Mathematics and Mathematical Sciences

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We propose a Domain-Specific Architecture for elementary function computation to improve throughput while reducing power consumption as a model for more general applications: support fine-grained parallelism by eliminating branches, and eliminate the duplication required by coprocessors by decomposing computation into instructions which fit existing pipelined execution models and standard register files. Our example instruction architecture (ISA) extension supports scalar and vector/SIMD implementations of table-based methods of calculating all common special functions, with the aim of improving throughput by (1) eliminating the need for tables in memory, (2) eliminating all branches for special cases, and (3) reducing the total number of instructions. Two new instructions are required, a table lookup instruction and an extended-precision floating-point multiply-add instruction with special treatment for exceptional inputs. To estimate the performance impact of these instructions, we implemented them in a modified Cell/B.E. SPU simulator and observed an average throughput improvement of 2.5 times for optimized loops mapping single functions over long vectors.

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“…[ [50][51][52][53][54] Nitrogen heterocycles 2-acetyl pyridine , 2-acetyl pyridine phosphate, (2Z)-3-imino-4-methyl-2-(pyridin-3ylhydrazono) pentanenitrile(I);4-(3,4-dichlorophenyl)-2,6-dimethyl-1,2dihydropyridine-3,5-dicarbonitrile(II);1,4-diamino-5-cyano-2-(4-methoxyphenyl)-6-oxo-1,6-dihydropyridine-3-carboxylic acid(III);ethyl 4-amino-5-cyano-2-(dicyanomethylene)-6-phenyl-1,2-dihydropyridine-3-carboxylate(IV), 3,5-dimethyl-1Hpyrazole (P1), pyridine (P2) and 2-(3-methyl-1H-pyrazol-5-yl) pyridine (P3), ethyl 5,50dimethyl-10H-1,30-bipyrazole-3 carboxylate (P1) and3,5,50-trimethyl-10H-1,30bipyrazole (P2). [ [75][76][77][78][79][80][81][82][83][84]87,88] The inhibition efficiency of the compounds follows the order of Xanthione > Xanthone >Xanthene. This can be explained by considering its chemical structure as in Fig Generally, two modes of adsorption could be considered.…”

Section: Xanthene Compoundsmentioning

confidence: 99%

“…The physisorption of MIP is also proved by UV-studies and free energy calculation. Formazan of benzaldehyde (FB) is investigated as a corrosion inhibitor by B. Anand for mild steel in HCl media [78]. Electrochemical studies have revealed it acts as a mixed inhibitor, simultaneously controlling both anodic and cathodic corrosion processes.…”

Section: Miscellaneous Compoundsmentioning

confidence: 99%

Review on Mechanistic Action of Inhibitors on Steel Corrosion in Acidic Media

Vinutha

Venkatesha

2016

Port. Electrochim. Acta

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Use of inhibitor is proven as an efficient and widely accepted corrosion prevention method. Corrosion control of steel is an important activity in technical, economic, environmental and safety terms. This article enumerates several types of inhibitors used to combat corrosion in acidic medium. In this paper, literature on corrosion inhibitors has been reviewed and discussions are made on properties and efficiency of inhibitors. (The prominent features of our work on the mechanism of corrosion inhibitors have been highlighted and in a few cases have tried to predict its mechanism).

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An Optimized Cell BE Special Function Library Generated by Coconut

Cited by 9 publications

References 11 publications

SLEEF: A Portable Vectorized Library of C Standard Mathematical Functions

SLEEF: A Portable Vectorized Library of C Standard Mathematical Functions

A Domain-Specific Architecture for Elementary Function Evaluation

Review on Mechanistic Action of Inhibitors on Steel Corrosion in Acidic Media

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