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Home > NEON and VFP Programmers Model > Modes of operation > RunFast mode |
RunFast mode is the combination of the following conditions:
the VFP coprocessor is in flush-to-zero mode
the VFP coprocessor is in default NaN mode
all exception enable bits are cleared to 0.
In RunFast mode the VFP coprocessor:
processes subnormal input operands as zeros
processes results that are tiny before rounding, that is, between the positive and negative minimum normal values for the destination precision, as zeros
processes input NaNs as default NaNs
returns the default result specified by the IEEE 754 standard for overflow, division by zero, invalid operation, or inexact operation conditions fully in hardware and without additional latency.