#include #include "f2c.h" /* Subroutine */ int zlaset_slu(char *uplo, integer *m, integer *n, doublecomplex *alpha, doublecomplex *beta, doublecomplex *a, integer * lda) { /* -- LAPACK auxiliary routine (version 2.0) -- Univ. of Tennessee, Univ. of California Berkeley, NAG Ltd., Courant Institute, Argonne National Lab, and Rice University October 31, 1992 Purpose ======= ZLASET initializes a 2-D array A to BETA on the diagonal and ALPHA on the offdiagonals. Arguments ========= UPLO (input) CHARACTER*1 Specifies the part of the matrix A to be set. = 'U': Upper triangular part is set. The lower triangle is unchanged. = 'L': Lower triangular part is set. The upper triangle is unchanged. Otherwise: All of the matrix A is set. M (input) INTEGER On entry, M specifies the number of rows of A. N (input) INTEGER On entry, N specifies the number of columns of A. ALPHA (input) COMPLEX*16 All the offdiagonal array elements are set to ALPHA. BETA (input) COMPLEX*16 All the diagonal array elements are set to BETA. A (input/output) COMPLEX*16 array, dimension (LDA,N) On entry, the m by n matrix A. On exit, A(i,j) = ALPHA, 1 <= i <= m, 1 <= j <= n, i.ne.j; A(i,i) = BETA , 1 <= i <= min(m,n) LDA (input) INTEGER The leading dimension of the array A. LDA >= max(1,M). ===================================================================== Parameter adjustments Function Body */ /* System generated locals */ integer a_dim1, a_offset, i__1, i__2, i__3; /* Local variables */ static integer i, j; #define A(I,J) a[(I)-1 + ((J)-1)* ( *lda)] if (strncmp(uplo, "U", 1)==0) { /* Set the diagonal to BETA and the strictly upper triangular part of the array to ALPHA. */ i__1 = *n; for (j = 2; j <= *n; ++j) { /* Computing MIN */ i__3 = j - 1; i__2 = min(i__3,*m); for (i = 1; i <= min(j-1,*m); ++i) { i__3 = i + j * a_dim1; A(i,j).r = alpha->r, A(i,j).i = alpha->i; /* L10: */ } /* L20: */ } i__1 = min(*n,*m); for (i = 1; i <= min(*n,*m); ++i) { i__2 = i + i * a_dim1; A(i,i).r = beta->r, A(i,i).i = beta->i; /* L30: */ } } else if (strncmp(uplo, "L", 1)==0) { /* Set the diagonal to BETA and the strictly lower triangular part of the array to ALPHA. */ i__1 = min(*m,*n); for (j = 1; j <= min(*m,*n); ++j) { i__2 = *m; for (i = j + 1; i <= *m; ++i) { i__3 = i + j * a_dim1; A(i,j).r = alpha->r, A(i,j).i = alpha->i; /* L40: */ } /* L50: */ } i__1 = min(*n,*m); for (i = 1; i <= min(*n,*m); ++i) { i__2 = i + i * a_dim1; A(i,i).r = beta->r, A(i,i).i = beta->i; /* L60: */ } } else { /* Set the array to BETA on the diagonal and ALPHA on the offdiagonal. */ i__1 = *n; for (j = 1; j <= *n; ++j) { i__2 = *m; for (i = 1; i <= *m; ++i) { i__3 = i + j * a_dim1; A(i,j).r = alpha->r, A(i,j).i = alpha->i; /* L70: */ } /* L80: */ } i__1 = min(*m,*n); for (i = 1; i <= min(*m,*n); ++i) { i__2 = i + i * a_dim1; A(i,i).r = beta->r, A(i,i).i = beta->i; /* L90: */ } } return 0; /* End of ZLASET */ } /* zlaset_slu */