e3181f26b1
Changed MPI routines to hypre_MPI routines. Added hypre_printf, etc. routines. Added AUTOTEST tests to look for 'int' and 'MPI_' calls. Added a new approach for the Fortran interface (not implemented everywhere yet).
356 lines
8.2 KiB
C
356 lines
8.2 KiB
C
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/* -- translated by f2c (version 19940927).
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You must link the resulting object file with the libraries:
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-lf2c -lm (in that order)
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*/
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#include "f2c.h"
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#include "hypre_blas.h"
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/* Subroutine */ HYPRE_Int dsyrk_(char *uplo, char *trans, integer *n, integer *k,
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doublereal *alpha, doublereal *a, integer *lda, doublereal *beta,
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doublereal *c, integer *ldc)
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{
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/* System generated locals */
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/* Local variables */
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static integer info;
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static doublereal temp;
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static integer i, j, l;
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extern logical hypre_lsame_(char *, char *);
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static integer nrowa;
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static logical upper;
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extern /* Subroutine */ HYPRE_Int hypre_xerbla_(char *, integer *);
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/* Purpose
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=======
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DSYRK performs one of the symmetric rank k operations
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C := alpha*A*A' + beta*C,
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or
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C := alpha*A'*A + beta*C,
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where alpha and beta are scalars, C is an n by n symmetric matrix
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and A is an n by k matrix in the first case and a k by n matrix
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in the second case.
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Parameters
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==========
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UPLO - CHARACTER*1.
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On entry, UPLO specifies whether the upper or lower
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triangular part of the array C is to be referenced as
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follows:
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UPLO = 'U' or 'u' Only the upper triangular part of C
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is to be referenced.
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UPLO = 'L' or 'l' Only the lower triangular part of C
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is to be referenced.
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Unchanged on exit.
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TRANS - CHARACTER*1.
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On entry, TRANS specifies the operation to be performed as
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follows:
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TRANS = 'N' or 'n' C := alpha*A*A' + beta*C.
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TRANS = 'T' or 't' C := alpha*A'*A + beta*C.
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TRANS = 'C' or 'c' C := alpha*A'*A + beta*C.
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Unchanged on exit.
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N - INTEGER.
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On entry, N specifies the order of the matrix C. N must be
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at least zero.
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Unchanged on exit.
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K - INTEGER.
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On entry with TRANS = 'N' or 'n', K specifies the number
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of columns of the matrix A, and on entry with
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TRANS = 'T' or 't' or 'C' or 'c', K specifies the number
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of rows of the matrix A. K must be at least zero.
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Unchanged on exit.
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ALPHA - DOUBLE PRECISION.
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On entry, ALPHA specifies the scalar alpha.
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Unchanged on exit.
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A - DOUBLE PRECISION array of DIMENSION ( LDA, ka ), where ka is
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k when TRANS = 'N' or 'n', and is n otherwise.
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Before entry with TRANS = 'N' or 'n', the leading n by k
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part of the array A must contain the matrix A, otherwise
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the leading k by n part of the array A must contain the
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matrix A.
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Unchanged on exit.
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LDA - INTEGER.
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On entry, LDA specifies the first dimension of A as declared
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in the calling (sub) program. When TRANS = 'N' or 'n'
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then LDA must be at least max( 1, n ), otherwise LDA must
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be at least max( 1, k ).
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Unchanged on exit.
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BETA - DOUBLE PRECISION.
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On entry, BETA specifies the scalar beta.
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Unchanged on exit.
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C - DOUBLE PRECISION array of DIMENSION ( LDC, n ).
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Before entry with UPLO = 'U' or 'u', the leading n by n
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upper triangular part of the array C must contain the upper
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triangular part of the symmetric matrix and the strictly
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lower triangular part of C is not referenced. On exit, the
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upper triangular part of the array C is overwritten by the
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upper triangular part of the updated matrix.
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Before entry with UPLO = 'L' or 'l', the leading n by n
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lower triangular part of the array C must contain the lower
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triangular part of the symmetric matrix and the strictly
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upper triangular part of C is not referenced. On exit, the
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lower triangular part of the array C is overwritten by the
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lower triangular part of the updated matrix.
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LDC - INTEGER.
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On entry, LDC specifies the first dimension of C as declared
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in the calling (sub) program. LDC must be at least
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max( 1, n ).
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Unchanged on exit.
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Level 3 Blas routine.
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-- Written on 8-February-1989.
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Jack Dongarra, Argonne National Laboratory.
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Iain Duff, AERE Harwell.
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Jeremy Du Croz, Numerical Algorithms Group Ltd.
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Sven Hammarling, Numerical Algorithms Group Ltd.
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Test the input parameters.
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Parameter adjustments
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Function Body */
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#define A(I,J) a[(I)-1 + ((J)-1)* ( *lda)]
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#define C(I,J) c[(I)-1 + ((J)-1)* ( *ldc)]
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if (hypre_lsame_(trans, "N")) {
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nrowa = *n;
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} else {
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nrowa = *k;
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}
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upper = hypre_lsame_(uplo, "U");
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info = 0;
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if (! upper && ! hypre_lsame_(uplo, "L")) {
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info = 1;
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} else if (! hypre_lsame_(trans, "N") && ! hypre_lsame_(trans, "T") &&
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! hypre_lsame_(trans, "C")) {
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info = 2;
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} else if (*n < 0) {
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info = 3;
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} else if (*k < 0) {
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info = 4;
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} else if (*lda < max(1,nrowa)) {
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info = 7;
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} else if (*ldc < max(1,*n)) {
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info = 10;
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}
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if (info != 0) {
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hypre_xerbla_("DSYRK ", &info);
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return 0;
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}
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/* Quick return if possible. */
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if (*n == 0 || ((*alpha == 0. || *k == 0) && (*beta == 1.))) {
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return 0;
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}
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/* And when alpha.eq.zero. */
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if (*alpha == 0.) {
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if (upper) {
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if (*beta == 0.) {
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for (j = 1; j <= *n; ++j) {
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for (i = 1; i <= j; ++i) {
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C(i,j) = 0.;
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/* L10: */
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}
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/* L20: */
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}
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} else {
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for (j = 1; j <= *n; ++j) {
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for (i = 1; i <= j; ++i) {
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C(i,j) = *beta * C(i,j);
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/* L30: */
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}
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/* L40: */
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}
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}
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} else {
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if (*beta == 0.) {
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for (j = 1; j <= *n; ++j) {
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for (i = j; i <= *n; ++i) {
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C(i,j) = 0.;
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/* L50: */
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}
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/* L60: */
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}
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} else {
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for (j = 1; j <= *n; ++j) {
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for (i = j; i <= *n; ++i) {
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C(i,j) = *beta * C(i,j);
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/* L70: */
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}
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/* L80: */
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}
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}
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}
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return 0;
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}
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/* Start the operations. */
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if (hypre_lsame_(trans, "N")) {
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/* Form C := alpha*A*A' + beta*C. */
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if (upper) {
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for (j = 1; j <= *n; ++j) {
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if (*beta == 0.) {
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for (i = 1; i <= j; ++i) {
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C(i,j) = 0.;
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/* L90: */
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}
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} else if (*beta != 1.) {
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for (i = 1; i <= j; ++i) {
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C(i,j) = *beta * C(i,j);
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/* L100: */
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}
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}
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for (l = 1; l <= *k; ++l) {
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if (A(j,l) != 0.) {
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temp = *alpha * A(j,l);
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for (i = 1; i <= j; ++i) {
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C(i,j) += temp * A(i,l);
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/* L110: */
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}
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}
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/* L120: */
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}
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/* L130: */
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}
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} else {
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for (j = 1; j <= *n; ++j) {
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if (*beta == 0.) {
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for (i = j; i <= *n; ++i) {
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C(i,j) = 0.;
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/* L140: */
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}
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} else if (*beta != 1.) {
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for (i = j; i <= *n; ++i) {
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C(i,j) = *beta * C(i,j);
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/* L150: */
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}
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}
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for (l = 1; l <= *k; ++l) {
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if (A(j,l) != 0.) {
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temp = *alpha * A(j,l);
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for (i = j; i <= *n; ++i) {
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C(i,j) += temp * A(i,l);
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/* L160: */
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}
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}
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/* L170: */
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}
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/* L180: */
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}
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}
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} else {
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/* Form C := alpha*A'*A + beta*C. */
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if (upper) {
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for (j = 1; j <= *n; ++j) {
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for (i = 1; i <= j; ++i) {
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temp = 0.;
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for (l = 1; l <= *k; ++l) {
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temp += A(l,i) * A(l,j);
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/* L190: */
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}
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if (*beta == 0.) {
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C(i,j) = *alpha * temp;
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} else {
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C(i,j) = *alpha * temp + *beta * C(i,j);
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}
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/* L200: */
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}
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/* L210: */
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}
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} else {
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for (j = 1; j <= *n; ++j) {
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for (i = j; i <= *n; ++i) {
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temp = 0.;
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for (l = 1; l <= *k; ++l) {
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temp += A(l,i) * A(l,j);
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/* L220: */
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}
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if (*beta == 0.) {
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C(i,j) = *alpha * temp;
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} else {
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C(i,j) = *alpha * temp + *beta * C(i,j);
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}
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/* L230: */
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}
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/* L240: */
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}
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}
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}
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return 0;
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/* End of DSYRK . */
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} /* dsyrk_ */
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