Contents
crotg - Construct a Given's plane rotation
SUBROUTINE CROTG(A, B, C, S)
COMPLEX A, B, S
REAL C
SUBROUTINE CROTG_64(A, B, C, S)
COMPLEX A, B, S
REAL C
F95 INTERFACE
SUBROUTINE ROTG(A, B, C, S)
COMPLEX :: A, B, S
REAL :: C
SUBROUTINE ROTG_64(A, B, C, S)
COMPLEX :: A, B, S
REAL :: C
C INTERFACE
#include <sunperf.h>
void crotg(complex *a, complex *b, float *c, complex *s);
void crotg_64(complex *a, complex *b, float *c, complex *s);
crotg Construct a Given's plane rotation that will annihi-
late an element of a vector.
A (input/output)
On entry, A contains the entry in the first vector
that corresponds to the element to be annihilated
in the second vector. On exit, contains the
nonzero element of the rotated vector.
B (input)
On entry, B contains the entry to be annihilated
in the second 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.