Configuration

ETL can be configured with several macros:

• ETL_VECTORIZE_IMPL: Enable vectorized implementations of some algorithms
• ETL_VECTORIZE_EXPR: Allow ETL to vectorize all expressions when possible (for instance r = a + b / c)
• ETL_VECTORIZE_FULL: Shortcut for ETL_VECTORIZE_IMPL and ETL_VECTORIZE_EXPR
• ETL_BLAS_MODE: Allow the use of a BLAS library (through cblas). A BLAS library must be installed.
• ETL_MKL_MODE: Allow the use of Intel MKL-specific functions to tune some algorithms (currently online inplace matrix transposition and FFT)
• ETL_NO_TEMPORARY: Prevent expressions from creating temporaries. This is likely to slow down computations.
• ETL_ELEMENT_WISE_MULTIPLICATION: When this option is activated, a * b always results in element wise multiplication
• ETL_STRICT_DIV: Prevent ETL from using multiplication to perform division
• ETL_UNROLL_VECT: Tell ETL to unroll vectorized loops
• ETL_UNROLL_NON_VECT: Tell ETL to unroll normal loops