This section describes nv_bfloat16 precision intrinsic functions. To use these functions, include the header file cuda_bf16.h in your program. All of the functions defined here are available in device code. Some of the functions are also available to host compilers, please refer to respective functions' documentation for details.

NOTE: Aggressive floating-point optimizations performed by host or device compilers may affect numeric behavior of the functions implemented in this header. Specific examples are:

• hsin( __nv_bfloat16);

• hcos( __nv_bfloat16);

• h2sin( __nv_bfloat162);

• h2cos( __nv_bfloat162);

The following macros are available to help users selectively enable/disable various definitions present in the header file:

• CUDA_NO_BFLOAT16 - If defined, this macro will prevent the definition of additional type aliases in the global namespace, helping to avoid potential conflicts with symbols defined in the user program.

• __CUDA_NO_BFLOAT16_CONVERSIONS__ - If defined, this macro will prevent the use of the C++ type conversions (converting constructors and conversion operators) that are common for built-in floating-point types, but may be undesirable for __nv_bfloat16 which is essentially a user-defined type.

• __CUDA_NO_BFLOAT16_OPERATORS__ and __CUDA_NO_BFLOAT162_OPERATORS__ - If defined, these macros will prevent the inadvertent use of usual arithmetic and comparison operators. This enforces the storage-only type semantics and prevents C++ style computations on __nv_bfloat16 and __nv_bfloat162 types.