gcc/testsuite/gfortran.fortran-torture/execute/intrinsic_matmul.f90

   1 ! Program to test the MATMUL intrinsic
   2 program intrinsic_matmul
   3    implicit none
   4    integer, dimension(2, 3) :: a
   5    integer, dimension(3, 2) :: b
   6    integer, dimension(2) :: x
   7    integer, dimension(3) :: y
   8    integer, dimension(2, 2) :: r
   9    integer, dimension(3) :: v
  10    real, dimension (2,2) :: aa
  11    real, dimension (4,2) :: cc
  12
  13    a = reshape((/1, 2, 2, 3, 3, 4/), (/2, 3/))
  14    b = reshape((/1, 2, 3, 3, 4, 5/), (/3, 2/))
  15    x = (/1, 2/)
  16    y = (/1, 2, 3/)
  17
  18    r = matmul(a, b)
  19    if (any(r .ne. reshape((/14, 20, 26, 38/), (/2, 2/)))) STOP 1
  20
  21    v = matmul(x, a)
  22    if (any(v .ne. (/5, 8, 11/))) STOP 2
  23
  24    v(1:2) = matmul(a, y)
  25    if (any(v(1:2) .ne. (/14, 20/))) STOP 3
  26
  27   aa = reshape((/ 1.0, 1.0, 0.0, 1.0/), shape(aa))
  28   cc = 42.
  29   cc(1:2,1:2) = matmul(aa, transpose(aa))
  30   if (any(cc(1:2,1:2) .ne. reshape((/ 1.0, 1.0, 1.0, 2.0 /), (/2,2/)))) STOP 4
  31   if (any(cc(3:4,1:2) .ne. 42.)) STOP 5
  32 end program