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+CLBlast: Testing the library for correctness
+================
+
+This document describes how to test the library. For other information about CLBlast, see the [main README](../README.md).
+
+
+Compiling the correctness tests
+-------------
+
+To make sure CLBlast is working correctly on your device (recommended), compile with the tests enabled by specifying `-DTESTS=ON`, for example as follows:
+
+    cmake -DTESTS=ON ..
+
+To build these tests, another BLAS library is needed to serve as a reference. This can be either:
+
+* The OpenCL BLAS library [clBLAS](http://github.com/clMathLibraries/clBLAS) (maintained by AMD)
+* A regular CPU Netlib BLAS library, e.g.:
+  - OpenBLAS
+  - BLIS
+  - Accelerate
+
+Afterwards, executables in the form of `clblast_test_xxxxx` are available, in which `xxxxx` is the name of a routine (e.g. `xgemm`). 
+
+
+Running the tests
+-------------
+
+All tests can be run as individual executables or directly together in one go through the `make alltests` target or using CTest (`make test` or `ctest`). In the latter case the output is less verbose. Both cases allow you to set the default device and platform to non-zero by setting the `CLBLAST_DEVICE` and `CLBLAST_PLATFORM` environmental variables. Further options can be supplied through the `CLBLAST_ARGUMENTS` environmental variable (e.g. export CLBLAST_ARGUMENTS="-full_test -cblas 1 -clblas 0" on a UNIX system).
+
+Note that CLBlast is tested for correctness against [clBLAS](http://github.com/clMathLibraries/clBLAS) and/or a regular CPU BLAS library. If both are installed on your system, setting the command-line option `-clblas 1` or `-cblas 1` will select the library to test against for the `clblast_test_xxxxx` executables. All tests have a `-verbose` option to enable additional diagnostic output. They also have a `-full_test` option to increase coverage further.