srotmg

NAME

srotmg - Construct a Gentleman's modified Given's plane rotation

SYNOPSIS

  SUBROUTINE SROTMG( D1, D2, B1, B2, PARAM)
  REAL D1, D2, B1, B2
  REAL PARAM(*)
 
  SUBROUTINE SROTMG_64( D1, D2, B1, B2, PARAM)
  REAL D1, D2, B1, B2
  REAL PARAM(*)

F95 INTERFACE

  SUBROUTINE ROTMG( D1, D2, B1, B2, PARAM)
  REAL :: D1, D2, B1, B2
  REAL, DIMENSION(:) :: PARAM
 
  SUBROUTINE ROTMG_64( D1, D2, B1, B2, PARAM)
  REAL :: D1, D2, B1, B2
  REAL, DIMENSION(:) :: PARAM

C INTERFACE

#include <sunperf.h>

void srotmg(float d1, float d2, float b1, float b2, float *param);

void srotmg_64(float d1, float d2, float b1, float b2, float *param);

PURPOSE

srotmg Construct Gentleman's modified a Given's plane rotation that will annihilate an element of a vector.

ARGUMENTS

* D1 (input/output): On entry, the first diagonal entry in the H matrix. On exit, changed to reflect the effect of the transformation.
* D2 (input/output): On entry, the second diagonal entry in the H matrix. On exit, changed to reflect the effect of the transformation.
* B1 (input/output): On entry, the first element of the vector to which the H matrix is applied. On exit, changed to reflect the effect of the transformation.
* B2 (input/output): On entry, the second element of the vector to which the H matrix is applied. On exit, changed to reflect the effect of the transformation.
* PARAM (input/output): On entry, PARAM(1) describes the form of the H matrix. On exit, PARAM(2..5) contain the H matrix.