| ! { dg-options "-floop-nest-optimize -O2" } |
| |
| MODULE dbcsr_geev |
| INTEGER, PARAMETER :: real_8=8 |
| CONTAINS |
| SUBROUTINE dbcsr_dgeev(jobvl,jobvr,matrix,ndim,evals,revec,levec) |
| CHARACTER(1) :: jobvl, jobvr |
| REAL(real_8), DIMENSION(:, :) :: matrix |
| INTEGER :: ndim |
| COMPLEX(real_8), DIMENSION(:) :: evals |
| COMPLEX(real_8), DIMENSION(:, :) :: revec, levec |
| INTEGER :: i, info, lwork |
| REAL(real_8) :: norm, tmp_array(ndim,ndim), & |
| work(20*ndim) |
| REAL(real_8), DIMENSION(ndim) :: eval1, eval2 |
| REAL(real_8), DIMENSION(ndim, ndim) :: evec_l, evec_r |
| DO WHILE (i.le.ndim) |
| IF(ABS(eval2(i)).LT.EPSILON(REAL(0.0,real_8)))THEN |
| norm=SQRT(SUM(evec_r(:,i)**2.0_real_8)+SUM(evec_r(:,i+1)**2.0_real_8)) |
| revec(:,i)=CMPLX(evec_r(:,i),evec_r(:,i+1),real_8)/norm |
| END IF |
| END DO |
| END SUBROUTINE dbcsr_dgeev |
| END MODULE dbcsr_geev |
