Henry Rich wrote: > For arithmetic operations in general, it would also be > a much better use of coding time to take advantage of > the SSE3 instructions. With careful coding there could > be a severalfold increase in speed for +/ .* and a > noticeable improvement for other floating-point arithmetics.
I agree with Henry. From source code of J7, it appeared J did not make use of floating point stack for computation. Not sure this had been changed in later release. Given that SIMD (MMX SSE SSE2 3DNow) is almost available in every Intel/AMD CPU. Not making use of them in computational intensive program like J seems under-utilise the CPU's raw power. -- regards, bill ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
