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visual-studioparallel-processingintelsimd

How do I know if a vector function (SIMD) really worked on multiple objects at a time?

I am trying to understand whether my compiler interprets my vector notation as single objects (equivalent to a for loop) or works on multiple data at a time.

Does anyone know how I do it? I have Intel Parallel Studio 2011 installed on Visual Studio 2010.

Solution

  • If in doubt look at the generated code, e.g.

    $ icc -S ... foo.c -o foo.S