BLAS1_C
Basic Linear Algebra Subprograms
Level 1
Single Precision Complex Arithmetic

BLAS1_C is a C library which implements the Level 1 BLAS, or Basic Linear Algebra Subprograms.

The BLAS are a small core library of linear algebra utilities, which can be highly optimized for various architectures. Software that relies on the BLAS is thus highly portable, and will typically run very efficiently.

The Level 1 BLAS are primarily for use in vector operations. In certain cases, they may also be used to operate on the rows or columns of a two-dimensional array.

Licensing:

The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.

Languages:

BLAS1_C is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version.

Related Data and Programs:

BLAS0, a C library which contains auxilliary functions for the Basic Linear Algebra Subprograms (BLAS).

BLAS1_D, a C library which contains basic linear algebra routines for vector-vector operations, using double precision real arithmetic.

BLAS1_S, a C library which contains basic linear algebra routines for vector-vector operations, using single precision real arithmetic.

BLAS1_Z, a C library which contains basic linear algebra routines for vector-vector operations, using double precision complex arithmetic.

BLAS2, a C library which contains basic linear algebra subprograms (BLAS) for matrix-vector operations;

BLAS3, a C library which contains basic linear algebra subprograms (BLAS) for matrix-matrix operations;

CLAPACK, C programs which illustrate the use of the CLAPACK library, a translation of the FORTRAN77 BLAS and LAPACK linear algebra libraries, including single and double precision, real and complex arithmetic.

COMPLEX_NUMBERS, a C program which demonstrates some simple features involved in the use of complex numbers in C programming.

LINPACK, a C library which solves linear systems using single precision complex arithmetic;

SUPER_BLAS, a C library which implements some of the Basic Linear Algebra Subprograms for fast execution.

Author:

Original FORTRAN77 version by Charles Lawson, Richard Hanson, David Kincaid, Fred Krogh. C version by John Burkardt.

Reference:

1. Thomas Coleman, Charles vanLoan,
   Handbook for Matrix Computations,
   SIAM, 1988,
   ISBN13: 978-0-898712-27-8,
   LC: QA188.C65.
2. Jack Dongarra, Jim Bunch, Cleve Moler, Pete Stewart,
   LINPACK User's Guide,
   SIAM, 1979,
   ISBN13: 978-0-898711-72-1,
   LC: QA214.L56.
3. Charles Lawson, Richard Hanson, David Kincaid, Fred Krogh,
   Algorithm 539: Basic Linear Algebra Subprograms for Fortran Usage,
   ACM Transactions on Mathematical Software,
   Volume 5, Number 3, September 1979, pages 308-323.

Source Code:

• blas1_c.c, the source code.
• blas1_c.h, the include file.

Examples and Tests:

• blas1_c_test.c, the calling program.
• blas1_c_test.txt the output file.

List of Routines:

• CAXPY computes a constant times a vector plus a vector.
• CCOPY copies a vector X to a vector Y.
• CDOTC forms the conjugated dot product of two vectors.
• CDOTU forms the unconjugated dot product of two vectors.
• CROTG determines a Givens rotation.
• CSCAL scales a vector by a constant.
• CSROT applies a plane rotation.
• CSSCAL scales a vector by a real constant.
• CSWAP interchanges two vectors.
• ICAMAX indexes the vector element of maximum absolute value.
• SCASUM takes the sum of the absolute values of a vector.
• SCNRM2 returns the euclidean norm of a vector.

You can go up one level to the C source codes.