4 Commits

Author	SHA1	Message	Date
Rasmus Munk Larsen	1b84f21e32	Revert change that made conversion from bfloat16 to {float, double} implicit. ... Add roundtrip tests for casting between bfloat16 and complex types.	2020-07-22 18:09:00 -07:00
Niels Dekker	0e1a33a461	Faster conversion from integer types to bfloat16 ... Specialized `bfloat16_impl::float_to_bfloat16_rtne(float)` for normal floating point numbers, infinity and zero, in order to improve the performance of `bfloat16::bfloat16(const T&)` for integer argument types. A reduction of more than 20% of the runtime duration of conversion from int to bfloat16 was observed, using Visual C++ 2019 on Windows 10.	2020-07-22 19:25:49 +02:00
Niels Dekker	4ab32e2de2	Allow implicit conversion from bfloat16 to float and double ... Conversion from `bfloat16` to `float` and `double` is lossless. It seems natural to allow the conversion to be implicit, as the C++ language also support implicit conversion from a smaller to a larger floating point type. Intel's OneDLL bfloat16 implementation also has an implicit `operator float()`: https://github.com/oneapi-src/oneDNN/blob/v1.5/src/common/bfloat16.hpp	2020-07-11 13:32:28 +02:00
Teng Lu	386d809bde	Support BFloat16 in Eigen	2020-06-20 19:16:24 +00:00