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).
279 lines
7.5 KiB
C
279 lines
7.5 KiB
C
|
|
#include "hypre_blas.h"
|
|
#include "f2c.h"
|
|
|
|
/* Subroutine */ HYPRE_Int dtrmv_(char *uplo, char *trans, char *diag, integer *n,
|
|
doublereal *a, integer *lda, doublereal *x, integer *incx)
|
|
{
|
|
/* System generated locals */
|
|
integer a_dim1, a_offset, i__1, i__2;
|
|
/* Local variables */
|
|
static integer info;
|
|
static doublereal temp;
|
|
static integer i__, j;
|
|
extern logical hypre_lsame_(char *, char *);
|
|
static integer ix, jx, kx;
|
|
extern /* Subroutine */ HYPRE_Int hypre_xerbla_(char *, integer *);
|
|
static logical nounit;
|
|
#define a_ref(a_1,a_2) a[(a_2)*a_dim1 + a_1]
|
|
/* Purpose
|
|
=======
|
|
DTRMV performs one of the matrix-vector operations
|
|
x := A*x, or x := A'*x,
|
|
where x is an n element vector and A is an n by n unit, or non-unit,
|
|
upper or lower triangular matrix.
|
|
Parameters
|
|
==========
|
|
UPLO - CHARACTER*1.
|
|
On entry, UPLO specifies whether the matrix is an upper or
|
|
lower triangular matrix as follows:
|
|
UPLO = 'U' or 'u' A is an upper triangular matrix.
|
|
UPLO = 'L' or 'l' A is a lower triangular matrix.
|
|
Unchanged on exit.
|
|
TRANS - CHARACTER*1.
|
|
On entry, TRANS specifies the operation to be performed as
|
|
follows:
|
|
TRANS = 'N' or 'n' x := A*x.
|
|
TRANS = 'T' or 't' x := A'*x.
|
|
TRANS = 'C' or 'c' x := A'*x.
|
|
Unchanged on exit.
|
|
DIAG - CHARACTER*1.
|
|
On entry, DIAG specifies whether or not A is unit
|
|
triangular as follows:
|
|
DIAG = 'U' or 'u' A is assumed to be unit triangular.
|
|
DIAG = 'N' or 'n' A is not assumed to be unit
|
|
triangular.
|
|
Unchanged on exit.
|
|
N - INTEGER.
|
|
On entry, N specifies the order of the matrix A.
|
|
N must be at least zero.
|
|
Unchanged on exit.
|
|
A - DOUBLE PRECISION array of DIMENSION ( LDA, n ).
|
|
Before entry with UPLO = 'U' or 'u', the leading n by n
|
|
upper triangular part of the array A must contain the upper
|
|
triangular matrix and the strictly lower triangular part of
|
|
A is not referenced.
|
|
Before entry with UPLO = 'L' or 'l', the leading n by n
|
|
lower triangular part of the array A must contain the lower
|
|
triangular matrix and the strictly upper triangular part of
|
|
A is not referenced.
|
|
Note that when DIAG = 'U' or 'u', the diagonal elements of
|
|
A are not referenced either, but are assumed to be unity.
|
|
Unchanged on exit.
|
|
LDA - INTEGER.
|
|
On entry, LDA specifies the first dimension of A as declared
|
|
in the calling (sub) program. LDA must be at least
|
|
max( 1, n ).
|
|
Unchanged on exit.
|
|
X - DOUBLE PRECISION array of dimension at least
|
|
( 1 + ( n - 1 )*abs( INCX ) ).
|
|
Before entry, the incremented array X must contain the n
|
|
element vector x. On exit, X is overwritten with the
|
|
tranformed vector x.
|
|
INCX - INTEGER.
|
|
On entry, INCX specifies the increment for the elements of
|
|
X. INCX must not be zero.
|
|
Unchanged on exit.
|
|
Level 2 Blas routine.
|
|
-- Written on 22-October-1986.
|
|
Jack Dongarra, Argonne National Lab.
|
|
Jeremy Du Croz, Nag Central Office.
|
|
Sven Hammarling, Nag Central Office.
|
|
Richard Hanson, Sandia National Labs.
|
|
Test the input parameters.
|
|
Parameter adjustments */
|
|
a_dim1 = *lda;
|
|
a_offset = 1 + a_dim1 * 1;
|
|
a -= a_offset;
|
|
--x;
|
|
/* Function Body */
|
|
info = 0;
|
|
if (! hypre_lsame_(uplo, "U") && ! hypre_lsame_(uplo, "L")) {
|
|
info = 1;
|
|
} else if (! hypre_lsame_(trans, "N") && ! hypre_lsame_(trans,
|
|
"T") && ! hypre_lsame_(trans, "C")) {
|
|
info = 2;
|
|
} else if (! hypre_lsame_(diag, "U") && ! hypre_lsame_(diag,
|
|
"N")) {
|
|
info = 3;
|
|
} else if (*n < 0) {
|
|
info = 4;
|
|
} else if (*lda < max(1,*n)) {
|
|
info = 6;
|
|
} else if (*incx == 0) {
|
|
info = 8;
|
|
}
|
|
if (info != 0) {
|
|
hypre_xerbla_("DTRMV ", &info);
|
|
return 0;
|
|
}
|
|
/* Quick return if possible. */
|
|
if (*n == 0) {
|
|
return 0;
|
|
}
|
|
nounit = hypre_lsame_(diag, "N");
|
|
/* Set up the start point in X if the increment is not unity. This
|
|
will be ( N - 1 )*INCX too small for descending loops. */
|
|
if (*incx <= 0) {
|
|
kx = 1 - (*n - 1) * *incx;
|
|
} else if (*incx != 1) {
|
|
kx = 1;
|
|
}
|
|
/* Start the operations. In this version the elements of A are
|
|
accessed sequentially with one pass through A. */
|
|
if (hypre_lsame_(trans, "N")) {
|
|
/* Form x := A*x. */
|
|
if (hypre_lsame_(uplo, "U")) {
|
|
if (*incx == 1) {
|
|
i__1 = *n;
|
|
for (j = 1; j <= i__1; ++j) {
|
|
if (x[j] != 0.) {
|
|
temp = x[j];
|
|
i__2 = j - 1;
|
|
for (i__ = 1; i__ <= i__2; ++i__) {
|
|
x[i__] += temp * a_ref(i__, j);
|
|
/* L10: */
|
|
}
|
|
if (nounit) {
|
|
x[j] *= a_ref(j, j);
|
|
}
|
|
}
|
|
/* L20: */
|
|
}
|
|
} else {
|
|
jx = kx;
|
|
i__1 = *n;
|
|
for (j = 1; j <= i__1; ++j) {
|
|
if (x[jx] != 0.) {
|
|
temp = x[jx];
|
|
ix = kx;
|
|
i__2 = j - 1;
|
|
for (i__ = 1; i__ <= i__2; ++i__) {
|
|
x[ix] += temp * a_ref(i__, j);
|
|
ix += *incx;
|
|
/* L30: */
|
|
}
|
|
if (nounit) {
|
|
x[jx] *= a_ref(j, j);
|
|
}
|
|
}
|
|
jx += *incx;
|
|
/* L40: */
|
|
}
|
|
}
|
|
} else {
|
|
if (*incx == 1) {
|
|
for (j = *n; j >= 1; --j) {
|
|
if (x[j] != 0.) {
|
|
temp = x[j];
|
|
i__1 = j + 1;
|
|
for (i__ = *n; i__ >= i__1; --i__) {
|
|
x[i__] += temp * a_ref(i__, j);
|
|
/* L50: */
|
|
}
|
|
if (nounit) {
|
|
x[j] *= a_ref(j, j);
|
|
}
|
|
}
|
|
/* L60: */
|
|
}
|
|
} else {
|
|
kx += (*n - 1) * *incx;
|
|
jx = kx;
|
|
for (j = *n; j >= 1; --j) {
|
|
if (x[jx] != 0.) {
|
|
temp = x[jx];
|
|
ix = kx;
|
|
i__1 = j + 1;
|
|
for (i__ = *n; i__ >= i__1; --i__) {
|
|
x[ix] += temp * a_ref(i__, j);
|
|
ix -= *incx;
|
|
/* L70: */
|
|
}
|
|
if (nounit) {
|
|
x[jx] *= a_ref(j, j);
|
|
}
|
|
}
|
|
jx -= *incx;
|
|
/* L80: */
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
/* Form x := A'*x. */
|
|
if (hypre_lsame_(uplo, "U")) {
|
|
if (*incx == 1) {
|
|
for (j = *n; j >= 1; --j) {
|
|
temp = x[j];
|
|
if (nounit) {
|
|
temp *= a_ref(j, j);
|
|
}
|
|
for (i__ = j - 1; i__ >= 1; --i__) {
|
|
temp += a_ref(i__, j) * x[i__];
|
|
/* L90: */
|
|
}
|
|
x[j] = temp;
|
|
/* L100: */
|
|
}
|
|
} else {
|
|
jx = kx + (*n - 1) * *incx;
|
|
for (j = *n; j >= 1; --j) {
|
|
temp = x[jx];
|
|
ix = jx;
|
|
if (nounit) {
|
|
temp *= a_ref(j, j);
|
|
}
|
|
for (i__ = j - 1; i__ >= 1; --i__) {
|
|
ix -= *incx;
|
|
temp += a_ref(i__, j) * x[ix];
|
|
/* L110: */
|
|
}
|
|
x[jx] = temp;
|
|
jx -= *incx;
|
|
/* L120: */
|
|
}
|
|
}
|
|
} else {
|
|
if (*incx == 1) {
|
|
i__1 = *n;
|
|
for (j = 1; j <= i__1; ++j) {
|
|
temp = x[j];
|
|
if (nounit) {
|
|
temp *= a_ref(j, j);
|
|
}
|
|
i__2 = *n;
|
|
for (i__ = j + 1; i__ <= i__2; ++i__) {
|
|
temp += a_ref(i__, j) * x[i__];
|
|
/* L130: */
|
|
}
|
|
x[j] = temp;
|
|
/* L140: */
|
|
}
|
|
} else {
|
|
jx = kx;
|
|
i__1 = *n;
|
|
for (j = 1; j <= i__1; ++j) {
|
|
temp = x[jx];
|
|
ix = jx;
|
|
if (nounit) {
|
|
temp *= a_ref(j, j);
|
|
}
|
|
i__2 = *n;
|
|
for (i__ = j + 1; i__ <= i__2; ++i__) {
|
|
ix += *incx;
|
|
temp += a_ref(i__, j) * x[ix];
|
|
/* L150: */
|
|
}
|
|
x[jx] = temp;
|
|
jx += *incx;
|
|
/* L160: */
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
/* End of DTRMV . */
|
|
} /* dtrmv_ */
|
|
#undef a_ref
|
|
|