Vector-Vector Operations

   

with John Gunnels Vector-vector operations are those operations that operate on one or two vectors. Examples include scaling of the elements of a vector and (scaled) addition of two vectors. A commonly used set of these are given as part of the level-1 BLAS. The content of this chapter centers around that set of vector-vector operation.

We provide a number of level-1 BLAS layers:

• Copy
  • Standard FORTRAN call
  • PLAPACK FORTRAN-C interface
  • PLAPACK calls
• Swap
  • Standard FORTRAN call
  • PLAPACK FORTRAN-C interface
  • PLAPACK calls
• Scaling a Vector (Object)
  • Standard FORTRAN call
  • PLAPACK FORTRAN-C interface
  • PLAPACK calls
• Scaled Vector (Object) Addition
  • Standard FORTRAN call
  • PLAPACK FORTRAN-C interface
  • PLAPACK calls
• Inner Product of Vectors
  • Standard FORTRAN call
  • PLAPACK FORTRAN-C interface
  • PLAPACK calls
• Norms of Vectors
  • Standard FORTRAN call
  • PLAPACK FORTRAN-C interface
  • PLAPACK calls
• Maximum Absolute Value in Vector
  • Standard FORTRAN call
  • PLAPACK FORTRAN-C interface
  • PLAPACK calls
• Example: Parallelizing Inner Product
• Example: Parallelizing ``axpy'' for Vector Objects
• More Operations and Information