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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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17
blas/single.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 +18,19 @@
#include "level2_impl.h"
#include "level2_real_impl.h"
#include "level3_impl.h"
float BLASFUNC(sdsdot)(int* n, float* alpha, float* px, int* incx, float* py, int* incy)
{
float* x = reinterpret_cast<float*>(px);
float* y = reinterpret_cast<float*>(py);
float ret = *alpha;
if(*n>0) {
if(*incx==1 && *incy==1) ret += (vector(x,*n).cwiseProduct(vector(y,*n))).sum();
else if(*incx>0 && *incy>0) ret += (vector(x,*n,*incx).cwiseProduct(vector(y,*n,*incy))).sum();
else if(*incx<0 && *incy>0) ret += (vector(x,*n,-*incx).reverse().cwiseProduct(vector(y,*n,*incy))).sum();
else if(*incx>0 && *incy<0) ret += (vector(x,*n,*incx).cwiseProduct(vector(y,*n,-*incy).reverse())).sum();
else if(*incx<0 && *incy<0) ret += (vector(x,*n,-*incx).reverse().cwiseProduct(vector(y,*n,-*incy).reverse())).sum();
}
return ret;
}