國立高雄大學圖資館 |

Language: English

Back

A redundant digit floating point system.

Record Type:	Electronic resources : Monograph/item
Title/Author:	A redundant digit floating point system.
Author:	Fahmy, Hossam Aly Hassan.
Description:	146 p.
Notes:	Adviser: Michael J. Flynn.
Notes:	Source: Dissertation Abstracts International, Volume: 64-05, Section: B, page: 2314.
Contained By:	Dissertation Abstracts International64-05B.
Subject:	Engineering, Electronics and Electrical.
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3090583
ISBN:	0496383051

A redundant digit floating point system.
Fahmy, Hossam Aly Hassan.

A redundant digit floating point system. [electronic resource] - 146 p.

Adviser: Michael J. Flynn.

Thesis (Ph.D.)--Stanford University, 2003.

A partially redundant number system is used as an internal format for floating point arithmetic operations. The redundant number system is based on signed digits and enables carry free arithmetic operations to improve the performance. Conversion from the proposed internal format back to the standard IEEE format is done only when an operand is written to memory. A detailed discussion of an adder and a multiplier using the proposed format is presented and the specific challenges of the designs are explained. Beside the redundancy, the proposed units include further enhancements that increase the floating point performance such as a hexadecimal based number format and a postponed rounding technique.

ISBN: 0496383051Subjects--Topical Terms:

226981
Engineering, Electronics and Electrical.

A redundant digit floating point system.
LDR:02946nmm _2200289 _450 001 161989
005 20051017073359.5
008 230606s2003 eng d
020 $a 0496383051
035 $a 00148490
035 $a 161989
040 $a UnM $c UnM
100 0 $a Fahmy, Hossam Aly Hassan. $3 227087
245 1 2 $a A redundant digit floating point system. $h [electronic resource]
300 $a 146 p.
500 $a Adviser: Michael J. Flynn.
500 $a Source: Dissertation Abstracts International, Volume: 64-05, Section: B, page: 2314.
502 $a Thesis (Ph.D.)--Stanford University, 2003.
520 # $a A partially redundant number system is used as an internal format for floating point arithmetic operations. The redundant number system is based on signed digits and enables carry free arithmetic operations to improve the performance. Conversion from the proposed internal format back to the standard IEEE format is done only when an operand is written to memory. A detailed discussion of an adder and a multiplier using the proposed format is presented and the specific challenges of the designs are explained. Beside the redundancy, the proposed units include further enhancements that increase the floating point performance such as a hexadecimal based number format and a postponed rounding technique.
520 # $a A time delay model is developed and applied to analytically predict the performance of the floating point units. The predicted delays are then compared to state-of-the-art designs. The comparison is done over a range of operand widths, fan-in and radices to show the merits of each implementation. The proposed system achieves better performance for double precision and larger operand width. Transistor simulation of the complete adder and multiplier confirm the performance advantage predicted by the analytical model. A brief description of a divider using; the proposed format is also presented.
520 # $a Arithmetic operations are among the most basic instructions in microprocessors, digital signal processors and graphics accelerators. Addition is the most frequent arithmetic operation in numerically intensive applications. Multiplication follows closely and then division and other elementary functions. The speed of those arithmetic operations is also often directly linked to the overall performance of the computers. The work presented in this thesis proposes several techniques to improve the effectiveness of floating point arithmetic units.
520 # $a The proposed internal format and arithmetic units comply with all the rounding modes of the IEEE 754 floating point standard.
590 $a School code: 0212.
650 # 0 $a Engineering, Electronics and Electrical. $3 226981
650 # 0 $a Computer Science. $3 212513
710 0 # $a Stanford University. $3 212607
773 0 # $g 64-05B. $t Dissertation Abstracts International
790 $a 0212
790 1 0 $a Flynn, Michael J., $e advisor
791 $a Ph.D.
792 $a 2003
856 4 0 $u http://libsw.nuk.edu.tw/login?url=http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3090583 $z http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3090583