topic Probably x86 does not in Intel® oneAPI Math Kernel Library

c# Marshalling LAPACKE_zgesvxx

Gianluca_G_1 — Mon, 16 Nov 2015 15:36:03 GMT

I implemented a C# program that test LAPACKE_zgesvxx function.

The example works with x64 platform but fail with x86 platform, return info=-7 error!

I suppose there are difference in function declaration, but I don't know where, and how to solve it.

I did many changes in the declaration part, but with 25 parameters became quite difficult to find the solution.

any ideas?

I Attach the example code and the data files used to test.

Thank you

Gianluca

Probably x86 does not

Dmitry_B_Intel — Tue, 17 Nov 2015 12:27:57 GMT

Probably x86 does not correctly interprets 'long' type, which is 8-byte in C#. Did you try replacing 'long' with 'int'?

Hi Dmitry,

Gianluca_G_1 — Tue, 17 Nov 2015 14:53:43 GMT

Hi Dmitry,

 [DllImport("mkl_rt.dll", ExactSpelling = true, SetLastError = false, CallingConvention = CallingConvention.Cdecl)]
        internal static extern int LAPACKE_zgesvxx(
            int matrix_layout,
            char fact,
            char trans,
            int n,
            int nrhs,
            [In, Out] Complex* A,
            int lda,
            [In, Out] Complex* af,
            int ldaf,
            [In, Out] int[] ipiv,
            ref char equed,
            [In, Out] double[] r,
            [In, Out] double[] c,
            [In, Out] Complex* B,
            int ldb,
            [In, Out] Complex* x,
            int ldx,
            ref double rcond,
            ref double rpvgrw,
            [In, Out] double[] berr,//ref double berr,
            int n_err_bnds,
            [In, Out] double[] err_bnds_norm,
            [In, Out] double[] err_bnds_comp,
            int nparams,
            [In, Out] double[] parameters
        );

I replaced long with int and now it works on both platforms

Thank you

Gianluca