Scroll to navigation

complex_blas_level1(3) LAPACK complex_blas_level1(3)

NAME

complex_blas_level1

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 crotg (CA, CB, C, S)
CROTG 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.

Date:

November 2017

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.

Date:

November 2017

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

INCX

          INCX is INTEGER
         storage spacing between elements of CX

CY

          CY is REAL 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.

Date:

November 2017

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

INCX

          INCX is INTEGER
         storage spacing between elements of CX

CY

          CY is REAL 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.

Date:

November 2017

Further Details:

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

subroutine crotg (complex CA, complex CB, real C, complex S)

CROTG

Purpose:

 CROTG determines a complex Givens rotation.

Parameters:

CA

          CA is COMPLEX

CB

          CB is COMPLEX

C

          C is REAL

S

          S is COMPLEX

Author:

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date:

November 2017

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.

Date:

November 2017

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.

Date:

December 2016

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.

Date:

November 2017

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.

Date:

November 2017

Further Details:

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

Author

Generated automatically by Doxygen for LAPACK from the source code.
Thu Sep 26 2019 Version 3.8.0