half-precision-float | 易学教程

Why is half-precision complex float arithmetic not supported in Python and CUDA?

阅读更多关于 Why is half-precision complex float arithmetic not supported in Python and CUDA?

问题 NumPY has complex64 corresponding to two float32's. But it also has float16's but no complex32. How come? I have signal processing calculation involving FFT's where I think I'd be fine with complex32, but I don't see how to get there. In particular I was hoping for speedup on NVidia GPU with cupy. However it seems that float16 is slower on GPU rather than faster. Why is half-precision unsupported and/or overlooked? Also related is why we don't have complex integers, as this may also present

Why is half-precision complex float arithmetic not supported in Python and CUDA?

阅读更多关于 Why is half-precision complex float arithmetic not supported in Python and CUDA?

Why is half-precision complex float arithmetic not supported in Python and CUDA?

阅读更多关于 Why is half-precision complex float arithmetic not supported in Python and CUDA?

Half-precision floating-point arithmetic on Intel chips

阅读更多关于 Half-precision floating-point arithmetic on Intel chips

问题 Is it possible to perform half-precision floating-point arithmetic on Intel chips? I know how to load/store/convert half-precision floating-point numbers [1] but I do not know how to add/multiply them without converting to single-precision floating-point numbers. [1] https://software.intel.com/en-us/articles/performance-benefits-of-half-precision-floats 回答1: Is it possible to perform half-precision floating-point arithmetic on Intel chips? Yes, apparently the on-chip GPU in Skylake and later

Half-precision floating-point arithmetic on Intel chips

阅读更多关于 Half-precision floating-point arithmetic on Intel chips

Is it possible to perform half-precision floating-point arithmetic on Intel chips? I know how to load/store/convert half-precision floating-point numbers [1] but I do not know how to add/multiply them without converting to single-precision floating-point numbers. [1] https://software.intel.com/en-us/articles/performance-benefits-of-half-precision-floats Is it possible to perform half-precision floating-point arithmetic on Intel chips? Yes, apparently the on-chip GPU in Skylake and later has hardware support for FP16 and FP64 , as well as FP32. With new enough drivers you can use it via OpenCL.

How to enable __fp16 type on gcc for x86_64

阅读更多关于 How to enable __fp16 type on gcc for x86_64

问题 The __fp16 floating point data-type is a well known extension to the C standard used notably on ARM processors. I would like to run the IEEE version of them on my x86_64 processor. While I know they typically do not have that, I would be fine with emulating them with "unsigned short" storage (they have the same alignment requirement and storage space), and (hardware) float arithmetic. Is there a way to request that in gcc? I assume the rounding might be slightly "incorrect", but that is ok to

How to enable __fp16 type on gcc for x86_64

阅读更多关于 How to enable __fp16 type on gcc for x86_64

The __fp16 floating point data-type is a well known extension to the C standard used notably on ARM processors. I would like to run the IEEE version of them on my x86_64 processor. While I know they typically do not have that, I would be fine with emulating them with "unsigned short" storage (they have the same alignment requirement and storage space), and (hardware) float arithmetic. Is there a way to request that in gcc? I assume the rounding might be slightly "incorrect", but that is ok to me. If this were to work in C++ too that would be ideal. I did not find a way to do so in gcc (as of

Why is there no 2-byte float and does an implementation already exist?

阅读更多关于 Why is there no 2-byte float and does an implementation already exist?

问题 Assuming I am really pressed for memory and want a smaller range (similar to short vs int ). Shader languages already support half for a floating-point type with half the precision (not just convert back and forth for the value to be between -1 and 1, that is, return a float like this: shortComingIn / maxRangeOfShort ). Is there an implementation that already exists for a 2-byte float? I am also interested to know any (historical?) reasons as to why there is no 2-byte float. 回答1: Re: