• NAME
• SYNOPSIS
• F95 INTERFACE
• C INTERFACE
• PURPOSE
• ARGUMENTS

NAME

srot - Apply a Given's rotation constructed by SROTG.

SYNOPSIS

  SUBROUTINE SROT( N, X, INCX, Y, INCY, C, S)
  INTEGER N, INCX, INCY
  REAL C, S
  REAL X(*), Y(*)

  SUBROUTINE SROT_64( N, X, INCX, Y, INCY, C, S)
  INTEGER*8 N, INCX, INCY
  REAL C, S
  REAL X(*), Y(*)

F95 INTERFACE

  SUBROUTINE ROT( [N], X, [INCX], Y, [INCY], C, S)
  INTEGER :: N, INCX, INCY
  REAL :: C, S
  REAL, DIMENSION(:) :: X, Y

  SUBROUTINE ROT_64( [N], X, [INCX], Y, [INCY], C, S)
  INTEGER(8) :: N, INCX, INCY
  REAL :: C, S
  REAL, DIMENSION(:) :: X, Y

C INTERFACE

#include <sunperf.h>

void srot(int n, float *x, int incx, float *y, int incy, float c, float s);

void srot_64(long n, float *x, long incx, float *y, long incy, float c, float s);

PURPOSE

srot Apply a Given's rotation constructed by SROTG.

ARGUMENTS

• N (input)
  On entry, N specifies the number of elements in the vector. N must be at least one for the subroutine to have any visible effect. Unchanged on exit.

• X (input)
  ( 1 + ( n - 1 )*abs( INCX ) ). Before entry, the incremented array X must contain the vector x. Unchanged on exit.

• INCX (input)
  On entry, INCX specifies the increment for the elements of X. INCX must not be zero. Unchanged on exit.

• Y (input/output)
  ( 1 + ( n - 1 )*abs( INCY ) ). On entry, the incremented array Y must contain the vector y. On exit, Y is overwritten by the updated vector y.

• INCY (input)
  On entry, INCY specifies the increment for the elements of Y. INCY must not be zero. Unchanged on exit.

• C (input)
  On entry, the C rotation value constructed by SROTG. Unchanged on exit.

• S (input)
  On entry, the S rotation value constructed by SROTG. Unchanged on exit.