SA2270930_High_Accuracy_Arithmetic_Jan84.pdf   I
 
 
 

 

  
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IBM System/370 RPQ
High Accuracy Arithmetic
Publication Number File Number
SA2270930 S37001
This publication describes an IBM System/370 RPQ, highaccuracy
arithmetic. The facility performs the floatingpoint operations
of addition, subtraction, multiplication, division, and scalar
product (the sum of products) with the maximum accuracy possible
within the floatingpointnumber representation. The
instructions of this facility are used, in conjunction with other
System/370 floatingpoint 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, GA227000, 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, " 