SWCU192 November 2021 CC1312R7 , CC1352P7 , CC2652P7 , CC2652R7
Setting the FZ bit of the Floating -point Status and Control Register FPSCR[24], enables flush-to-zero mode. In this mode, the FPU treats all subnormal input operands of arithmetic CDP operations as zeros in the operation. Exceptions that result from a zero operand are signaled appropriately. VABS, VNEG, and VMOV are not considered arithmetic CDP operations and are not affected by flush-to-zero mode. A result that is tiny, as described in the IEEE 754 standard, where the destination precision is smaller in magnitude than the minimum normal value before rounding, is replaced with a zero. The IDC flag, FPSCR[7], indicates when an input flush occurs. The UFC flag, FPSCR[3], indicates when a result flush occurs.