Increment for the array x. A vector x having component xi, i = 1,..., n, is stored in an array X() with increment argument incx. If incx > 0 then xi is stored in
X (1 + (i - 1) x incx). If incx < 0 then xi is stored in X (1 + (N - i) x incx). incx = 0 is an illegal value.

F_STRSV/F_DTRSV/F_CTRSV/F_ZTRSV

Triangular solve

INTEGER*8

DIAG, INCX, N, TRANS, UPLO

REAL*4

ALPHA, A( LDA, * ), X( * )

SUBROUTINE F_STRSV (UPLO, TRANS, DIAG, N, ALPHA, A, LDA, X,

INCX)

 

INTEGER*8

DIAG, INCX, N, TRANS, UPLO

REAL*8

ALPHA, A( LDA, * ), X( * )

SUBROUTINE F_DTRSV (UPLO, TRANS, DIAG, N, ALPHA, A, LDA, X,

INCX)

 

INTEGER*8

DIAG, INCX, N, TRANS, UPLO

COMPLEX*8

ALPHA, A( LDA, * ), X( * )

SUBROUTINE F_CTRSV (UPLO, TRANS, DIAG, N, ALPHA, A, LDA, X,

INCX)

 

INTEGER*8

DIAG, INCX, N, TRANS, UPLO

COMPLEX*16

ALPHA, A( LDA, * ), X( * )

SUBROUTINE F_ZTRSV (UPLO, TRANS, DIAG, N, ALPHA, A, LDA, X,

INCX)

Input

UPLO

Specifies whether a triangular matrix is upper or lower

 

 

triangular. Use either BLAS_UPPER or BLAS_LOWER.

 

TRANS

Specifies whether to apply the matrix (A), its transpose

 

 

(AT), or its conjugate transpose (A*). Use one of the

 

 

following: BLAS_NO_TRANS, BLAS_TRANS, or

 

 

BLAS_CONJ_TRANS.

 

DIAG

Specifies whether the triangular matrix has

 

 

unit-diagonal or not. Use one of the following:

 

 

BLAS_UNIT_DIAG or BLAS_NON_UNIT_DIAG.

 

N

Number of columns in matrix A, n > 0. If n ≤ 0 , the

 

 

subprograms do not reference A or X.

 

ALPHA

The scalar ALPHA.

 

A

REAL or COMPLEX array, dimension (LDA, N).

 

LDA

Leading dimension of array A. lda < 1 and lda < n are

 

 

illegal values.

 

X

REAL or COMPLEX array, minimum length

 

 

(N - 1) x incx + 1.

 

INCX

 

418HP MLIB User’s Guide