zrotg (3p)

Name

zrotg - Construct a Given's plane rotation

Synopsis

SUBROUTINE ZROTG(A, B, C, S)

DOUBLE COMPLEX A, B, S
DOUBLE PRECISION C

SUBROUTINE ZROTG_64(A, B, C, S)

DOUBLE COMPLEX A, B, S
DOUBLE PRECISION C




F95 INTERFACE
SUBROUTINE ROTG(A, B, C, S)

COMPLEX(8) :: A, B, S
REAL(8) :: C

SUBROUTINE ROTG_64(A, B, C, S)

COMPLEX(8) :: A, B, S
REAL(8) :: C




C INTERFACE
#include <sunperf.h>

void zrotg(doublecomplex *a, doublecomplex *b, double *c, doublecomplex
*s);

void zrotg_64(doublecomplex *a, doublecomplex *b, double *c, doublecom-
plex *s);

Description

Oracle Solaris Studio Performance Library                            zrotg(3P)



NAME
       zrotg - Construct a Given's plane rotation


SYNOPSIS
       SUBROUTINE ZROTG(A, B, C, S)

       DOUBLE COMPLEX A, B, S
       DOUBLE PRECISION C

       SUBROUTINE ZROTG_64(A, B, C, S)

       DOUBLE COMPLEX A, B, S
       DOUBLE PRECISION C




   F95 INTERFACE
       SUBROUTINE ROTG(A, B, C, S)

       COMPLEX(8) :: A, B, S
       REAL(8) :: C

       SUBROUTINE ROTG_64(A, B, C, S)

       COMPLEX(8) :: A, B, S
       REAL(8) :: C




   C INTERFACE
       #include <sunperf.h>

       void zrotg(doublecomplex *a, doublecomplex *b, double *c, doublecomplex
                 *s);

       void zrotg_64(doublecomplex *a, doublecomplex *b, double *c, doublecom-
                 plex *s);



PURPOSE
       zrotg  Construct  a Given's plane rotation that will annihilate an ele-
       ment of a vector.


ARGUMENTS
       A (input/output)
                 On entry, A contains the entry in the first vector that  cor-
                 responds  to the element to be annihilated in the second vec-
                 tor. On exit, contains the nonzero  element  of  the  rotated
                 vector.


       B (input)
                 On  entry, B contains the entry to be annihilated in the sec-
                 ond vector.  Unchanged on exit.


       C (output)
                 On exit, C and S are the elements of the rotation matrix that
                 will be applied to annihilate B.


       S (output)
                 On exit, C and S are the elements of the rotation matrix that
                 will be applied to annihilate B.




                                  7 Nov 2015                         zrotg(3P)