axpy matrix_vector matrix_matrix aat sci-libs/openblas-0.2.3 gfortran gcc -O3 -O3 -openmp threads sci-libs/openblas-0.2.3 gfortran gcc -O3 -O3 openmp -threads sci-libs/openblas-0.2.3 ifort icc -O3 -O3 -openmp threads sci-libs/openblas-0.2.3 ifort icc -O3 -O3 openmp -threads sci-libs/openblas-0.2.3 clang clang -O3 -O3 -openmp threads sci-libs/openblas-0.2.3 clang clang -O3 -O3 openmp -threads sci-libs/openblas-0.2.3 pathf90 pathcc -O3 -O3 -openmp threads sci-libs/openblas-0.2.3 pathf90 pathcc -O3 -O3 openmp -threads