Floating-Point IP Cores User Guide

ID 683750
Date 10/27/2021

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1.6.2. Special Case Numbers

The following table lists the special case numbers defined by the IEEE-754 standard and the data bit representations.
Table 6.  Special Case Numbers in IEEE-754 Representation 
Meaning Sign Field Exponent Field Mantissa Field
Zero Don’t care All 0’s All 0’s
Positive Denormalized 0 All 0’s Non-zero
Negative Denormalized 1 All 0’s Non-zero
Positive Infinity 0 All 1’s All 0’s
Negative Infinity 1 All 1’s All 0’s
Not-a-Number (NaN) Don’t care All 1’s Non-zero