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Half-precision is a floating-point format that occupies 16 bits.
Half-precision floating-point numbers are provided by:
The Vector Floating-Point (VFP) Version 4 architecture.
An optional extension to the VFPv3 architecture.
If a VFP coprocessor is not available, or if a VFPv3 coprocessor is used that does not have
the extension, half-precision floating-point numbers are supported through the
Half-precision floating-point numbers can only be used when selected with the
fp16_format= compiler command-line
The C++ name mangling for the half-precision data type is specified in the C++ generic Application Binary Interface (ABI).