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BLAS: implement DSDOT and SDSDOT; update test for them.

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Chen-Pang He
2012-09-05 18:59:32 +08:00
parent c4051d3d02
commit c86d047c2f
4 changed files with 763 additions and 179 deletions
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19
blas/double.cpp
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@@ -2,6 +2,7 @@
// for linear algebra.
//
// Copyright (C) 2009 Gael Guennebaud <gael.guennebaud@inria.fr>
// Copyright (C) 2012 Chen-Pang He <jdh8@ms63.hinet.net>
//
// This Source Code Form is subject to the terms of the Mozilla
// Public License v. 2.0. If a copy of the MPL was not distributed
@@ -17,3 +18,21 @@
#include "level2_impl.h"
#include "level2_real_impl.h"
#include "level3_impl.h"
// currently used by DSDOT only
double* cast_vector_to_double(float* x, int n, int incx)
{
double* ret = new double[n];
if(incx<0) vector(ret,n) = vector(x,n,-incx).reverse().cast<double>();
else vector(ret,n) = vector(x,n, incx).cast<double>();
return ret;
}
double BLASFUNC(dsdot)(int* n, float* px, int* incx, float* py, int* incy)
{
if(*n <= 0) return 0;
double* x = cast_vector_to_double(px, *n, *incx);
double* y = cast_vector_to_double(py, *n, *incy);
return vector(x,*n).cwiseProduct(vector(y,*n)).sum();
}