GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages
HPL_daxpy(3) HPL Library Functions HPL_daxpy(3)

HPL_daxpy - y := y + alpha * x.

#include "hpl.h"

void HPL_daxpy( const int N, const double ALPHA, const double * X, const int INCX, double * Y, const int INCY );

HPL_daxpy scales the vector x by alpha and adds it to y.

N (local input) const int
On entry, N specifies the length of the vectors x and y. N must be at least zero.
ALPHA (local input) const double
On entry, ALPHA specifies the scalar alpha. When ALPHA is supplied as zero, then the entries of the incremented array X need not be set on input.
X (local input) const double *
On entry, X is an incremented array of dimension at least ( 1 + ( n - 1 ) * abs( INCX ) ) that contains the vector x.
INCX (local input) const int
On entry, INCX specifies the increment for the elements of X. INCX must not be zero.
Y (local input/output) double *
On entry, Y is an incremented array of dimension at least ( 1 + ( n - 1 ) * abs( INCY ) ) that contains the vector y. On exit, the entries of the incremented array Y are updated with the scaled entries of the incremented array X.
INCY (local input) const int
On entry, INCY specifies the increment for the elements of Y. INCY must not be zero.

#include "hpl.h"

int main(int argc, char *argv[])
{ double x[3], y[3]; x[0] = 1.0; x[1] = 2.0; x[2] = 3.0; y[0] = 4.0; y[1] = 5.0; y[2] = 6.0; HPL_daxpy( 3, 2.0, x, 1, y, 1 ); printf("y=[%f,%f,%f]\n", y[0], y[1], y[2]); exit(0); return(0);
}

HPL_dcopy (3), HPL_dscal (3), HPL_dswap (3).
December 2, 2018 HPL 2.3

Search for    or go to Top of page |  Section 3 |  Main Index

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with ManDoc.