Method and device for handling data values

摘要

A floating point value can represent a number or something that is not a number (NaN). A floating point value that is a NaN having data field that stores information, such as a propagation count that indicates the number of times a NaN value has been propagated through instructions. A NaN evaluation instruction can determine whether one or more operands is a NaN operand of a particular type, and if so can generate a result that is a NaN of a different type. An exception can be generated based upon the NaN of the different type being provided as a resultant.

主权项

1. A method comprising:
receiving at an execution unit of a data processor a first floating point instruction identifying a first floating point operand comprising a first portion and a second portion; and in response to determining at the data processor that a first condition is met that includes the first portion having a NaN indicator that indicates the first floating point operand is not a number, incrementing a first value at the second portion to generate an incremented value.