3.6.3.1.1 qNaN and sNaN Propagation

The IEEE 754-2008/2019 standards indicates that source qNaNs should be propagated, including any associated payload. The FPU module does not propagate any source qNaNs, but instead generates fixed distinguished qNaN results.

In keeping with other device floating-point implementations, this module will propagate qNaN and sNaN values where possible. Refer to NaN Propagation for further detail.

For instructions where a source operand qNaN is not available, a distinguished qNaN value as shown below will be provided as the result whenever those instructions suffer a computational error.