dspr - perform the symmetric rank 1 operation A := alpha*x*x' + A
SUBROUTINE DSPR(UPLO, N, ALPHA, X, INCX, A) CHARACTER*1 UPLO INTEGER N, INCX DOUBLE PRECISION ALPHA DOUBLE PRECISION X(*), A(*) SUBROUTINE DSPR_64(UPLO, N, ALPHA, X, INCX, A) CHARACTER*1 UPLO INTEGER*8 N, INCX DOUBLE PRECISION ALPHA DOUBLE PRECISION X(*), A(*) F95 INTERFACE SUBROUTINE SPR(UPLO, N, ALPHA, X, INCX, A) CHARACTER(LEN=1) :: UPLO INTEGER :: N, INCX REAL(8) :: ALPHA REAL(8), DIMENSION(:) :: X, A SUBROUTINE SPR_64(UPLO, N, ALPHA, X, INCX, A) CHARACTER(LEN=1) :: UPLO INTEGER(8) :: N, INCX REAL(8) :: ALPHA REAL(8), DIMENSION(:) :: X, A C INTERFACE #include <sunperf.h> void dspr(char uplo, int n, double alpha, double *x, int incx, double *a); void dspr_64(char uplo, long n, double alpha, double *x, long incx, double *a);
Oracle Solaris Studio Performance Library dspr(3P) NAME dspr - perform the symmetric rank 1 operation A := alpha*x*x' + A SYNOPSIS SUBROUTINE DSPR(UPLO, N, ALPHA, X, INCX, A) CHARACTER*1 UPLO INTEGER N, INCX DOUBLE PRECISION ALPHA DOUBLE PRECISION X(*), A(*) SUBROUTINE DSPR_64(UPLO, N, ALPHA, X, INCX, A) CHARACTER*1 UPLO INTEGER*8 N, INCX DOUBLE PRECISION ALPHA DOUBLE PRECISION X(*), A(*) F95 INTERFACE SUBROUTINE SPR(UPLO, N, ALPHA, X, INCX, A) CHARACTER(LEN=1) :: UPLO INTEGER :: N, INCX REAL(8) :: ALPHA REAL(8), DIMENSION(:) :: X, A SUBROUTINE SPR_64(UPLO, N, ALPHA, X, INCX, A) CHARACTER(LEN=1) :: UPLO INTEGER(8) :: N, INCX REAL(8) :: ALPHA REAL(8), DIMENSION(:) :: X, A C INTERFACE #include <sunperf.h> void dspr(char uplo, int n, double alpha, double *x, int incx, double *a); void dspr_64(char uplo, long n, double alpha, double *x, long incx, double *a); PURPOSE dspr performs the symmetric rank 1 operation A := alpha*x*x' + A, where alpha is a real scalar, x is an n element vector and A is an n by n symmetric matrix, supplied in packed form. ARGUMENTS UPLO (input) On entry, UPLO specifies whether the upper or lower triangu- lar part of the matrix A is supplied in the packed array A as follows: UPLO = 'U' or 'u' The upper triangular part of A is sup- plied in A. UPLO = 'L' or 'l' The lower triangular part of A is sup- plied in A. Unchanged on exit. N (input) On entry, N specifies the order of the matrix A. N >= 0. Unchanged on exit. ALPHA (input) On entry, ALPHA specifies the scalar alpha. Unchanged on exit. X (input) ( 1 + ( n - 1 )*abs( INCX ) ). Before entry, the incremented array X must contain the n element vector x. Unchanged on exit. INCX (input) On entry, INCX specifies the increment for the elements of X. INCX <> 0. Unchanged on exit. A (input/output) ( ( n*( n + 1 ) )/2 ). Before entry with UPLO = 'U' or 'u', the array A must contain the upper triangular part of the symmetric matrix packed sequentially, column by column, so that A( 1 ) contains a( 1, 1 ), A( 2 ) and A( 3 ) contain a( 1, 2 ) and a( 2, 2 ) respectively, and so on. On exit, the array A is overwritten by the upper triangular part of the updated matrix. Before entry with UPLO = 'L' or 'l', the array A must contain the lower triangular part of the symmet- ric matrix packed sequentially, column by column, so that A( 1 ) contains a( 1, 1 ), A( 2 ) and A( 3 ) contain a( 2, 1 ) and a( 3, 1 ) respectively, and so on. On exit, the array A is overwritten by the lower triangular part of the updated matrix. 7 Nov 2015 dspr(3P)