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

NAME

csrot - Apply a plane rotation.

SYNOPSIS

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

  SUBROUTINE CSROT_64( N, X, INCX, Y, INCY, C, S)
  COMPLEX X(*), Y(*)
  INTEGER*8 N, INCX, INCY
  REAL C, S

F95 INTERFACE

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

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

C INTERFACE

#include <sunperf.h>

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

void csrot_64(long n, complex *x, long incx, complex *y, long incy, float c, float s);

PURPOSE

csrot Apply a plane rotation, where the cos and sin (c and s) are real and the vectors x and y are complex.

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)
  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 (output)
  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 cosine. Unchanged on exit.

• S (input)
  On entry, the sin. Unchanged on exit.