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[Help-gsl] About invalid parameters in cblas implementation

From: José Luis García Pallero
Subject: [Help-gsl] About invalid parameters in cblas implementation
Date: Sun, 28 Jun 2009 17:26:39 +0200

Working with cblas_dgemv() function I can see various diferences between
refblas and gsl cblas implementations about invalid parameters. While in gsl
cblas the function only abort the execution because incorrect values in
"order" and "Trans" input parameters, in the refblas implementation the
function calls xerbla when M<0, N<0, LDA<max(1,M), incX==0 or incY==0 (in
this cases gsl cblas do not make operations and return). In the gsl_blas_*
wrapper this cases are not catched. This produces different executions if
you link your programs with gslcblas or refblas, lapack, atlas, etc. Are
these differences a known fact?


José Luis García Pallero
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