Hi, I'm currently working on trying to implement a way to use the SIMD instructions of the SSEx family when computing a vector of complex numbers.
I have to say that I have never worked on compilation techniques before, and that I only have little understanding of the vectorization problems. I've spent a fait amount of time reading documentation and code, and I came to the conclusion that, at least for the multiplication and division of complex numbers, I had to implement them as functions in the libgcc as their scalar counterpart, __mul*c3 and __div*c3. I face a couple of issues here : what are the C types corresponding to the vector types, assuming they exist ? And, also important : I understand that the processor has to be in a certain state to use the SIMD instructions. Will it stay that way when calling a function, thus changing partially the environment ? Have a nice day, Simon Chopin
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