Nios II Custom Instruction User Guide

ID 683242
Date 4/27/2020
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6.3. IEEE 754 Exception Conditions with FPH2

The FPH2 component does not support exceptions. Instead, it creates a specific result. The following table shows the FPH2 results created for operations that would trigger an IEEE 754 exception.
Table 14.  IEEE 754 Exception Cases
IEEE 754 Exception FPH2 Result
Invalid NaN
Division by zero Signed infinity
Overflow Signed infinity
Underflow Signed zero
Inexact Normal number