C++ tester for BLAS

testBLAS

• is based on the Catch2 unit testing framework for C++.
• uses the C++ BLAS interface from either BLAS++ or <T>LAPACK.

Some additional information:

1. The test files are in the src directory. To add a new test case, you just need to create a file test_<something>.cpp under the src directory and build testBLAS.

2. The test file test_corner_cases.cpp has corner cases tests based on the BLAS specifications from the implementation of the BLAS standard in LAPACK. This is file is generated by the script in the folder scripts.

Supported in part by NSF ACI 2004850.

testBLAS is built and installed with CMake.

You can either download binaries for the latest stable or previous release of CMake, or build the current development distribution from source. CMake is also available in the APT repository on Ubuntu 16.04 or higher.

testBLAS depends on BLAS++. Alternatively, you can use <T>LAPACK and, in this case, you will be using testBLAS to test the C++ template BLAS in <T>LAPACK. Both packages will allow you to access different BLAS implementations.

If all dependencies are installed, testBLAS can be built using the standard CMake recipe

mkdir build
cmake -B build      # configuration step
cmake --build build # build step

You may need to inform the path for BLAS++ or <T>LAPACK. In the first case, the recipe would be

mkdir build
cmake -B build -D blaspp_DIR=<path-to-blaspp>   # configuration step
cmake --build build                             # build step

Standard environment variables affect CMake. Some examples are

CXX                 C++ compiler
CXXFLAGS            C++ compiler flags
LDFLAGS             linker flags

• This page lists the environment variables that have special meaning to CMake.

It is also possible to pass variables to CMake during the configuration step using the -D flag. The following example builds testBLAS in debug mode inside the directory build.

mkdir build
cmake -B build -D CMAKE_BUILD_TYPE=Debug .
cmake --build build

• This page documents variables that are provided by CMake or have meaning to CMake when set by project code.

Here are the testBLAS specific options and their default values

# Option                         # Default

TESTBLAS_BLAS                    blaspp
    
    C++ package used to access BLAS routines.
    Supported packages:
        blaspp, tlapack

There are 5 workflows that run automatically:

1. Test the BLAS templates in <T>LAPACK.

2. Test Netlib BLAS.

3. Test MKL BLAS.

4. Test BLIS.

5. Test OpenBLAS.

See https://github.com/tlapack/testBLAS/actions.

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Copyright (c) 2021-2023, University of Colorado Denver. All rights reserved. All rights reserved.

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