Contents
srotg - Construct a Given's plane rotation
SUBROUTINE SROTG(A, B, C, S)
REAL A, B, C, S
SUBROUTINE SROTG_64(A, B, C, S)
REAL A, B, C, S
F95 INTERFACE
SUBROUTINE ROTG(A, B, C, S)
REAL :: A, B, C, S
SUBROUTINE ROTG_64(A, B, C, S)
REAL :: A, B, C, S
C INTERFACE
#include <sunperf.h>
void srotg(float *a, float *b, float *c, float *s);
void srotg_64(float *a, float *b, float *c, float *s);
srotg 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/output)
On entry, B contains the entry to be annihilated
in the second vector. On exit, contains either S
or 1/C depending on which of the input values of A
and B is larger.
C (output)
On exit, C and S are the elements of the rotation
matrix that will be applied to annihilate B.
S (output)
See the description of C.