DOKK / manpages / debian 10 / liblapack-doc / zdotu.3.en
complex16_blas_level1(3) LAPACK complex16_blas_level1(3)

complex16_blas_level1


subroutine zaxpy (N, ZA, ZX, INCX, ZY, INCY)
ZAXPY subroutine zcopy (N, ZX, INCX, ZY, INCY)
ZCOPY complex *16 function zdotc (N, ZX, INCX, ZY, INCY)
ZDOTC complex *16 function zdotu (N, ZX, INCX, ZY, INCY)
ZDOTU subroutine zdrot (N, CX, INCX, CY, INCY, C, S)
ZDROT subroutine zdscal (N, DA, ZX, INCX)
ZDSCAL subroutine zrotg (CA, CB, C, S)
ZROTG subroutine zscal (N, ZA, ZX, INCX)
ZSCAL subroutine zswap (N, ZX, INCX, ZY, INCY)
ZSWAP

This is the group of complex16 LEVEL 1 BLAS routines.

ZAXPY

Purpose:


ZAXPY constant times a vector plus a vector.

Parameters:

N


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

ZA


ZA is COMPLEX*16
On entry, ZA specifies the scalar alpha.

ZX


ZX is COMPLEX*16 array, dimension ( 1 + ( N - 1 )*abs( INCX ) )

INCX


INCX is INTEGER
storage spacing between elements of ZX

ZY


ZY is COMPLEX*16 array, dimension ( 1 + ( N - 1 )*abs( INCY ) )

INCY


INCY is INTEGER
storage spacing between elements of ZY

Author:

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:

November 2017

Further Details:


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

ZCOPY

Purpose:


ZCOPY copies a vector, x, to a vector, y.

Parameters:

N


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

ZX


ZX is COMPLEX*16 array, dimension ( 1 + ( N - 1 )*abs( INCX ) )

INCX


INCX is INTEGER
storage spacing between elements of ZX

ZY


ZY is COMPLEX*16 array, dimension ( 1 + ( N - 1 )*abs( INCY ) )

INCY


INCY is INTEGER
storage spacing between elements of ZY

Author:

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:

November 2017

Further Details:


jack dongarra, linpack, 4/11/78.
modified 12/3/93, array(1) declarations changed to array(*)

ZDOTC

Purpose:


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

Parameters:

N


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

ZX


ZX is REAL array, dimension ( 1 + ( N - 1 )*abs( INCX ) )

INCX


INCX is INTEGER
storage spacing between elements of ZX

ZY


ZY is REAL array, dimension ( 1 + ( N - 1 )*abs( INCY ) )

INCY


INCY is INTEGER
storage spacing between elements of ZY

Author:

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:

November 2017

Further Details:


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

ZDOTU

Purpose:


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

Parameters:

N


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

ZX


ZX is REAL array, dimension ( 1 + ( N - 1 )*abs( INCX ) )

INCX


INCX is INTEGER
storage spacing between elements of ZX

ZY


ZY is REAL array, dimension ( 1 + ( N - 1 )*abs( INCY ) )

INCY


INCY is INTEGER
storage spacing between elements of ZY

Author:

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:

November 2017

Further Details:


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

ZDROT

Purpose:


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*16 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*16 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 DOUBLE PRECISION
On entry, C specifies the cosine, cos.

S


S is DOUBLE PRECISION
On entry, S specifies the sine, sin.

Author:

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:

December 2016

ZDSCAL

Purpose:


ZDSCAL scales a vector by a constant.

Parameters:

N


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

DA


DA is DOUBLE PRECISION
On entry, DA specifies the scalar alpha.

ZX


ZX is COMPLEX*16 array, dimension ( 1 + ( N - 1 )*abs( INCX ) )

INCX


INCX is INTEGER
storage spacing between elements of ZX

Author:

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:

November 2017

Further Details:


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

ZROTG

Purpose:


ZROTG determines a double complex Givens rotation.

Parameters:

CA


CA is COMPLEX*16

CB


CB is COMPLEX*16

C


C is DOUBLE PRECISION

S


S is COMPLEX*16

Author:

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:

November 2017

ZSCAL

Purpose:


ZSCAL scales a vector by a constant.

Parameters:

N


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

ZA


ZA is COMPLEX*16
On entry, ZA specifies the scalar alpha.

ZX


ZX is COMPLEX*16 array, dimension ( 1 + ( N - 1 )*abs( INCX ) )

INCX


INCX is INTEGER
storage spacing between elements of ZX

Author:

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:

November 2017

Further Details:


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

ZSWAP

Purpose:


ZSWAP interchanges two vectors.

Parameters:

N


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

ZX


ZX is COMPLEX*16 array, dimension ( 1 + ( N - 1 )*abs( INCX ) )

INCX


INCX is INTEGER
storage spacing between elements of ZX

ZY


ZY is COMPLEX*16 array, dimension ( 1 + ( N - 1 )*abs( INCY ) )

INCY


INCY is INTEGER
storage spacing between elements of ZY

Author:

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:

November 2017

Further Details:


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

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