Subnormals-Are-Zero (SAZ)

Subnormals-Are-Zero (SAZ) mode is enabled when FCR.SAZ is set and will ensure that any subnormal operand input to a Functional Block is replaced with a 0 value of the same sign as the subnormal value it is replacing. This avoids the consequences of processing or having to deal with subnormal datum. This operation applies to all floating-point instructions except: FMOV, FMOVC, FAND, FIOR, FTST, FLI2F and FDI2F.

Note: SAZ mode is applied to FABS and FNEG instructions to ensure result consistency with that of an equivalent sequence of FPU arithmetic instructions.

Note: Does not apply to FPU to CPU or CPU to FPU move instructions.