Effective SIMD Vectorization for Intel Xeon Phi Coprocessors

Algorithm 3

Small matrix multiplication summation.

real, dimension(4,4):: A, B, C

real sum

integer j, l, i

do j = 1, 4

 do l = 1, 4

  sum = 0.0

  do i = 1, 4

   sum = sum + A(i,l)   B(i,j)

  enddo

  C(l,j) = sum

 enddo

enddo