On 28/02/11 20:06, Tim Blechmann wrote:
Joel Falcou and I have a SIMD library in the works that we plan to submit to Boost by May; we've also submitted a boostcon talk on the subject. out of curiosity: do you support any `advanced' SIMD operations like libm functions for SIMD vectors and the like? i have a small generic SIMD library [1], which implements a subset of libm in a generic way. it might be an interesting gsoc project to add some kind of SIMD math support, if it is not in there, yet ... the functionality is not trivial to implement, but gives some considerable speedup ...
we have libm and more, just extracting list of function from the trigonometric toolbox give us this: https://github.com/MetaScale/nt2/tree/master/include/nt2/toolbox/trigonometr... for info, our sin/cos is like 9 cycles/value (~40 cycles per vector of float) with a 1-2 ulp of precision. we also have a degraded fast sin/cos that only works on the trigonometric circle and yields 2.7 cycles/values. Other speed up are roughly the same. and here is our complete toolbox list so far : https://github.com/MetaScale/nt2/tree/master/include/nt2/toolbox