Hi, I'm trying to learn about GCC's support for vector arithmetic and found the section "Using vector instructions through built-in functions", which answers a lot of questions, but unfortunately does not address things like gathering scalar values into a vector type or reading scalars out of such a variable, which I think is quite important for everyone who wants to use this nice extension.
More X86-specific, the section "X86 Built-in Functions" documents builtins for MMX, 3DNow, SSE, SSE3, but appears to omit the vector intrinsics for SSE2 like, e.g., __builtin_ia32_sqrtpd(). I would volunteer to expand the documentation in these two places if an insider could point me to a place where I can find the necessary information. Cheers, Martin
