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complex_blas_level1(3) LAPACK complex_blas_level1(3)

NAME

complex_blas_level1 - complex

SYNOPSIS

Functions


subroutine caxpy (N, CA, CX, INCX, CY, INCY)
CAXPY subroutine ccopy (N, CX, INCX, CY, INCY)
CCOPY complex function cdotc (N, CX, INCX, CY, INCY)
CDOTC complex function cdotu (N, CX, INCX, CY, INCY)
CDOTU subroutine cscal (N, CA, CX, INCX)
CSCAL subroutine csrot (N, CX, INCX, CY, INCY, C, S)
CSROT subroutine csscal (N, SA, CX, INCX)
CSSCAL subroutine cswap (N, CX, INCX, CY, INCY)
CSWAP

Detailed Description

This is the group of complex LEVEL 1 BLAS routines.

Function Documentation

subroutine caxpy (integer N, complex CA, complex, dimension(*) CX, integer INCX, complex, dimension(*) CY, integer INCY)

CAXPY

Purpose:


CAXPY constant times a vector plus a vector.

Parameters

N


N is INTEGER
number of elements in input vector(s)

CA


CA is COMPLEX
On entry, CA specifies the scalar alpha.

CX


CX is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCX ) )

INCX


INCX is INTEGER
storage spacing between elements of CX

CY


CY is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCY ) )

INCY


INCY is INTEGER
storage spacing between elements of CY

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Further Details:


jack dongarra, linpack, 3/11/78.
modified 12/3/93, array(1) declarations changed to array(*)

subroutine ccopy (integer N, complex, dimension(*) CX, integer INCX, complex, dimension(*) CY, integer INCY)

CCOPY

Purpose:


CCOPY copies a vector x to a vector y.

Parameters

N


N is INTEGER
number of elements in input vector(s)

CX


CX is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCX ) )

INCX


INCX is INTEGER
storage spacing between elements of CX

CY


CY is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCY ) )

INCY


INCY is INTEGER
storage spacing between elements of CY

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Further Details:


jack dongarra, linpack, 3/11/78.
modified 12/3/93, array(1) declarations changed to array(*)

complex function cdotc (integer N, complex, dimension(*) CX, integer INCX, complex, dimension(*) CY, integer INCY)

CDOTC

Purpose:


CDOTC forms the dot product of two complex vectors
CDOTC = X^H * Y

Parameters

N


N is INTEGER
number of elements in input vector(s)

CX


CX is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCX ) )

INCX


INCX is INTEGER
storage spacing between elements of CX

CY


CY is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCY ) )

INCY


INCY is INTEGER
storage spacing between elements of CY

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Further Details:


jack dongarra, linpack, 3/11/78.
modified 12/3/93, array(1) declarations changed to array(*)

complex function cdotu (integer N, complex, dimension(*) CX, integer INCX, complex, dimension(*) CY, integer INCY)

CDOTU

Purpose:


CDOTU forms the dot product of two complex vectors
CDOTU = X^T * Y

Parameters

N


N is INTEGER
number of elements in input vector(s)

CX


CX is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCX ) )

INCX


INCX is INTEGER
storage spacing between elements of CX

CY


CY is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCY ) )

INCY


INCY is INTEGER
storage spacing between elements of CY

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Further Details:


jack dongarra, linpack, 3/11/78.
modified 12/3/93, array(1) declarations changed to array(*)

subroutine cscal (integer N, complex CA, complex, dimension(*) CX, integer INCX)

CSCAL

Purpose:


CSCAL scales a vector by a constant.

Parameters

N


N is INTEGER
number of elements in input vector(s)

CA


CA is COMPLEX
On entry, CA specifies the scalar alpha.

CX


CX is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCX ) )

INCX


INCX is INTEGER
storage spacing between elements of CX

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Further Details:


jack dongarra, linpack, 3/11/78.
modified 3/93 to return if incx .le. 0.
modified 12/3/93, array(1) declarations changed to array(*)

subroutine csrot (integer N, complex, dimension( * ) CX, integer INCX, complex, dimension( * ) CY, integer INCY, real C, real S)

CSROT

Purpose:


CSROT applies a plane rotation, where the cos and sin (c and s) are real
and the vectors cx and cy are complex.
jack dongarra, linpack, 3/11/78.

Parameters

N


N is INTEGER
On entry, N specifies the order of the vectors cx and cy.
N must be at least zero.

CX


CX is COMPLEX array, dimension at least
( 1 + ( N - 1 )*abs( INCX ) ).
Before entry, the incremented array CX must contain the n
element vector cx. On exit, CX is overwritten by the updated
vector cx.

INCX


INCX is INTEGER
On entry, INCX specifies the increment for the elements of
CX. INCX must not be zero.

CY


CY is COMPLEX array, dimension at least
( 1 + ( N - 1 )*abs( INCY ) ).
Before entry, the incremented array CY must contain the n
element vector cy. On exit, CY is overwritten by the updated
vector cy.

INCY


INCY is INTEGER
On entry, INCY specifies the increment for the elements of
CY. INCY must not be zero.

C


C is REAL
On entry, C specifies the cosine, cos.

S


S is REAL
On entry, S specifies the sine, sin.

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

subroutine csscal (integer N, real SA, complex, dimension(*) CX, integer INCX)

CSSCAL

Purpose:


CSSCAL scales a complex vector by a real constant.

Parameters

N


N is INTEGER
number of elements in input vector(s)

SA


SA is REAL
On entry, SA specifies the scalar alpha.

CX


CX is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCX ) )

INCX


INCX is INTEGER
storage spacing between elements of CX

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Further Details:


jack dongarra, linpack, 3/11/78.
modified 3/93 to return if incx .le. 0.
modified 12/3/93, array(1) declarations changed to array(*)

subroutine cswap (integer N, complex, dimension(*) CX, integer INCX, complex, dimension(*) CY, integer INCY)

CSWAP

Purpose:


CSWAP interchanges two vectors.

Parameters

N


N is INTEGER
number of elements in input vector(s)

CX


CX is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCX ) )

INCX


INCX is INTEGER
storage spacing between elements of CX

CY


CY is COMPLEX array, dimension ( 1 + ( N - 1 )*abs( INCY ) )

INCY


INCY is INTEGER
storage spacing between elements of CY

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Further Details:


jack dongarra, linpack, 3/11/78.
modified 12/3/93, array(1) declarations changed to array(*)

Author

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