Contents
ctrmv - perform one of the matrix-vector operations x :=
A*x, or x := A'*x, or x := conjg( A' )*x
SUBROUTINE CTRMV(UPLO, TRANSA, DIAG, N, A, LDA, Y, INCY)
CHARACTER * 1 UPLO, TRANSA, DIAG
COMPLEX A(LDA,*), Y(*)
INTEGER N, LDA, INCY
SUBROUTINE CTRMV_64(UPLO, TRANSA, DIAG, N, A, LDA, Y, INCY)
CHARACTER * 1 UPLO, TRANSA, DIAG
COMPLEX A(LDA,*), Y(*)
INTEGER*8 N, LDA, INCY
F95 INTERFACE
SUBROUTINE TRMV(UPLO, [TRANSA], DIAG, [N], A, [LDA], Y, [INCY])
CHARACTER(LEN=1) :: UPLO, TRANSA, DIAG
COMPLEX, DIMENSION(:) :: Y
COMPLEX, DIMENSION(:,:) :: A
INTEGER :: N, LDA, INCY
SUBROUTINE TRMV_64(UPLO, [TRANSA], DIAG, [N], A, [LDA], Y, [INCY])
CHARACTER(LEN=1) :: UPLO, TRANSA, DIAG
COMPLEX, DIMENSION(:) :: Y
COMPLEX, DIMENSION(:,:) :: A
INTEGER(8) :: N, LDA, INCY
C INTERFACE
#include <sunperf.h>
void ctrmv(char uplo, char transa, char diag, int n, complex
*a, int lda, complex *y, int incy);
void ctrmv_64(char uplo, char transa, char diag, long n,
complex *a, long lda, complex *y, long incy);
ctrmv performs one of the matrix-vector operations x := A*x,
or x := A'*x, or x := conjg( 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.
UPLO (input)
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.
TRANSA (input)
On entry, TRANSA specifies the operation to be
performed as follows:
TRANSA = 'N' or 'n' x := A*x.
TRANSA = 'T' or 't' x := A'*x.
TRANSA = 'C' or 'c' x := conjg( A' )*x.
Unchanged on exit.
TRANSA is defaulted to 'N' for F95 INTERFACE.
DIAG (input)
On entry, DIAG specifies whether or not A is unit
triangular as follows:
DIAG = 'U' or 'u' A is assumed to be unit tri-
angular.
DIAG = 'N' or 'n' A is not assumed to be unit
triangular.
Unchanged on exit.
N (input)
On entry, N specifies the order of the matrix A.
N >= 0. Unchanged on exit.
A (input)
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 (input)
On entry, LDA specifies the first dimension of A
as declared in the calling (sub) program. LDA >=
max( 1, n ). Unchanged on exit.
Y (input/output)
( 1 + ( n - 1 )*abs( INCY ) ). Before entry, the
incremented array Y must contain the n element
vector x. On exit, Y is overwritten with the tran-
formed vector x.
INCY (input)
On entry, INCY specifies the increment for the
elements of Y. INCY <> 0. Unchanged on exit.