sgemv - vector operations y := alpha*A*x + beta*y or y := alpha*A'*x + beta*y
SUBROUTINE SGEMV(TRANSA, M, N, ALPHA, A, LDA, X, INCX, BETA, Y, INCY) CHARACTER*1 TRANSA INTEGER M, N, LDA, INCX, INCY REAL ALPHA, BETA REAL A(LDA,*), X(*), Y(*) SUBROUTINE SGEMV_64(TRANSA, M, N, ALPHA, A, LDA, X, INCX, BETA, Y, INCY) CHARACTER*1 TRANSA INTEGER*8 M, N, LDA, INCX, INCY REAL ALPHA, BETA REAL A(LDA,*), X(*), Y(*) F95 INTERFACE SUBROUTINE GEMV(TRANSA, M, N, ALPHA, A, LDA, X, INCX, BETA, Y, INCY) CHARACTER(LEN=1) :: TRANSA INTEGER :: M, N, LDA, INCX, INCY REAL :: ALPHA, BETA REAL, DIMENSION(:) :: X, Y REAL, DIMENSION(:,:) :: A SUBROUTINE GEMV_64(TRANSA, M, N, ALPHA, A, LDA, X, INCX, BETA, Y, INCY) CHARACTER(LEN=1) :: TRANSA INTEGER(8) :: M, N, LDA, INCX, INCY REAL :: ALPHA, BETA REAL, DIMENSION(:) :: X, Y REAL, DIMENSION(:,:) :: A C INTERFACE #include <sunperf.h> void sgemv(char transa, int m, int n, float alpha, float *a, int lda, float *x, int incx, float beta, float *y, int incy); void sgemv_64(char transa, long m, long n, float alpha, float *a, long lda, float *x, long incx, float beta, float *y, long incy);
Oracle Solaris Studio Performance Library sgemv(3P) NAME sgemv - perform one of the matrix-vector operations y := alpha*A*x + beta*y or y := alpha*A'*x + beta*y SYNOPSIS SUBROUTINE SGEMV(TRANSA, M, N, ALPHA, A, LDA, X, INCX, BETA, Y, INCY) CHARACTER*1 TRANSA INTEGER M, N, LDA, INCX, INCY REAL ALPHA, BETA REAL A(LDA,*), X(*), Y(*) SUBROUTINE SGEMV_64(TRANSA, M, N, ALPHA, A, LDA, X, INCX, BETA, Y, INCY) CHARACTER*1 TRANSA INTEGER*8 M, N, LDA, INCX, INCY REAL ALPHA, BETA REAL A(LDA,*), X(*), Y(*) F95 INTERFACE SUBROUTINE GEMV(TRANSA, M, N, ALPHA, A, LDA, X, INCX, BETA, Y, INCY) CHARACTER(LEN=1) :: TRANSA INTEGER :: M, N, LDA, INCX, INCY REAL :: ALPHA, BETA REAL, DIMENSION(:) :: X, Y REAL, DIMENSION(:,:) :: A SUBROUTINE GEMV_64(TRANSA, M, N, ALPHA, A, LDA, X, INCX, BETA, Y, INCY) CHARACTER(LEN=1) :: TRANSA INTEGER(8) :: M, N, LDA, INCX, INCY REAL :: ALPHA, BETA REAL, DIMENSION(:) :: X, Y REAL, DIMENSION(:,:) :: A C INTERFACE #include <sunperf.h> void sgemv(char transa, int m, int n, float alpha, float *a, int lda, float *x, int incx, float beta, float *y, int incy); void sgemv_64(char transa, long m, long n, float alpha, float *a, long lda, float *x, long incx, float beta, float *y, long incy); PURPOSE sgemv performs one of the matrix-vector operations y := alpha*A*x + beta*y, or y := alpha*A'*x + beta*y, where alpha and beta are scalars, x and y are vectors and A is an m by n matrix. ARGUMENTS TRANSA (input) On entry, TRANSA specifies the operation to be performed as follows: TRANSA = 'N' or 'n' y := alpha*A*x + beta*y. TRANSA = 'T' or 't' y := alpha*A'*x + beta*y. TRANSA = 'C' or 'c' y := alpha*A'*x + beta*y. Unchanged on exit. M (input) On entry, M specifies the number of rows of the matrix A. M >= 0. Unchanged on exit. N (input) On entry, N specifies the number of columns of the matrix A. N >= 0. Unchanged on exit. ALPHA (input) On entry, ALPHA specifies the scalar alpha. Unchanged on exit. A (input) Before entry, the leading m by n part of the array A must contain the matrix of coefficients. Unchanged on exit. LDA (input) On entry, LDA specifies the first dimension of A as declared in the calling (sub) program. LDA >= max( 1, m ). Unchanged on exit. X (input) ( 1 + ( n - 1 )*abs( INCX ) ) when TRANSA = 'N' or 'n' and at least ( 1 + ( m - 1 )*abs( INCX ) ) otherwise. 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 <> 0. Unchanged on exit. BETA (input) On entry, BETA specifies the scalar beta. When BETA is sup- plied as zero then Y need not be set on input. Unchanged on exit. Y (input/output) ( 1 + ( m - 1 )*abs( INCY ) ) when TRANSA = 'N' or 'n' and at least ( 1 + ( n - 1 )*abs( INCY ) ) otherwise. Before entry with BETA non-zero, 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 <> 0. Unchanged on exit. 7 Nov 2015 sgemv(3P)