IBM SA22-7093-0 High Accuracy Arithmetic Jan84 free download

File name SA22-7093-0_High_Accuracy_Arithmetic_Jan84.pdf

I --- - - --- - -- - - ---- - -- -- - -- ,- IBM System/370 RPQ High Accuracy Arithmetic Publication Number File Number SA22-7093-0 S370-01 This publication describes an IBM System/370 RPQ, high-accuracy arithmetic. The facility performs the floating-point operations of addition, subtraction, multiplication, division, and scalar product (the sum of products) with the maximum accuracy possible within the floating-point-number representation. The instructions of this facility are used, in conjunction with other System/370 floating-point instructions, in either the System/370 mode or the ECPS:VSE mode, if the model provides the ~ode. The reader should be familiar with the IBM ~~tem/370 Principles of Operation, GA22-7000, or the IBN 4300 P,'ocessors Principles of Ope r {l t ion for FCPS: VS E Mod e , GA22 - 7 0 7 0 , a 5 a p pro p i~ i atE, and particularly with Chapter 9, "Floating-Point Instructions," of either of those publicatiuns. The facility discussed in this publication is not available on all models. At the time of publication, it is provided on the IBM 4361 Processor. The information published her8in should not be construed as implying any intent~on by IBM to provide the facility on models other than tho~e for which it is announced. For more information concerning the availability of this facility on any particular modal, refer to the latest edition of the Func- tional Characteristics manual for the model. First Edition (January 1984) Changes are made pariodically to the informati~n herein; before using this p~blication in connection with the operation 6f IBM equipment, ~efer to the latest IBM ~stem/370 and ~300 Processors Bibliograph\!...t. GC20"OOOl, for the editions that are applicable and current. References in this publication to IBM products, programs, or services do not imply that IBM i~tends to make thase available in all countries in which IBM operates. Any reference to an IBM program product in this publication is not intended to state or imply that only IBM's program product may be used. Any func- tionally equivalent program may be used instead. Publications are not stocked at the address given below. Requests for IBM pUblications should be made to your IBM repre- sentative or to the IBM branch office serving your locality. A form for readers' commants is provided at the back of this publication. If the form has been removed, comm~nts may be addressed to IBM Corporation, Product Publications, Department 898, PO Box 390, Poughkeepsie, NY, U.S.A. 12602. IBM may use or distribute whatever information you supply in any way it believes appropriate without incurring any obligation to you. c Copyright International Business Machines Corporation 1984 CONTENTS HIGH-ACCURACY-ARITHMETIC FACILITY