VecAXPY#
Computes y = alpha x + y.
Synopsis#
#include "petscvec.h"
PetscErrorCode VecAXPY(Vec y, PetscScalar alpha, Vec x)
Logically Collective on Vec
Input Parameters#
alpha - the scalar
x, y - the vectors
Output Parameter#
y - output vector
Notes#
x and y MUST be different vectors This routine is optimized for alpha of 0.0, otherwise it calls the BLAS routine
VecAXPY(y,alpha,x) y = alpha x + y
VecAYPX(y,beta,x) y = x + beta y
VecAXPBY(y,alpha,beta,x) y = alpha x + beta y
VecWAXPY(w,alpha,x,y) w = alpha x + y
VecAXPBYPCZ(w,alpha,beta,gamma,x,y) z = alpha x + beta y + gamma z
VecMAXPY(y,nv,alpha[],x[]) y = sum alpha[i] x[i] + y
See Also#
VecAYPX()
, VecMAXPY()
, VecWAXPY()
, VecAXPBYPCZ()
, VecAXPBY()
Level#
intermediate
Location#
Examples#
src/vec/vec/tutorials/ex1.c.html
src/vec/vec/tutorials/ex1f.F90.html
src/vec/vec/tutorials/ex1f90.F90.html
src/vec/vec/tutorials/ex20f90.F90.html
src/vec/vec/tutorials/performance.c.html
src/mat/tutorials/ex2.c.html
src/mat/tutorials/ex9.c.html
src/dm/impls/stag/tutorials/ex1.c.html
src/dm/impls/stag/tutorials/ex2.c.html
src/dm/impls/stag/tutorials/ex3.c.html
src/dm/tutorials/ex10.c.html
Implementations#
VecAXPY_Nest in src/vec/vec/impls/nest/vecnest.c
VecAXPY_Seq in src/vec/vec/impls/seq/bvec1.c
VecAXPY_SeqKokkos in src/vec/vec/impls/seq/kokkos/veckok.kokkos.cxx
VecAXPY_SeqCUDA in src/vec/vec/impls/seq/seqcuda/veccuda2.cu
VecAXPY_SeqHIP in src/vec/vec/impls/seq/seqhip/vechip2.hip.c
VecAXPY_SeqViennaCL in src/vec/vec/impls/seq/seqviennacl/vecviennacl.cxx
Index of all Vec routines
Table of Contents for all manual pages
Index of all manual pages