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#include <iostream>
#include <functional>
#include <algorithm>
#include <vector>
#include <sstream>
#include <sys/time.h> // for gettimeofday
#include "promote.h"
#include "Semirings.h"
#include "Deleter.h"
#include <ext/numeric>
#include <tr1/array>
#include <xmmintrin.h>
#include <emmintrin.h>
//#include <smmintrin.h> // SSE-4
#define BETA 16
#define ITER 1000000
template<typename T, typename I>
T ** allocate2D(I m, I n)
{
T ** array = new T*[m];
for(I i = 0; i<m; ++i)
array[i] = new T[n];
return array;
}
template<typename T, typename I>
void deallocate2D(T ** array, I m)
{
for(I i = 0; i<m; ++i)
delete [] array[i];
delete [] array;
}
using namespace std;
//typedef int vpackedsi __attribute__ ((vector_size (BETA*sizeof(int)))); // 64-bytes, a full cache line !
//union ipackedvector
//{
// vpackedsi v;
// int f[BETA];
//};
template <int D, typename T>
void saxpy(T a, T * __restrict b, T * __restrict c)
{
for(int i=0; i<D; ++i)
{
c[i] += a* b[i];
}
}
template <int D, typename T>
void saxpy_array(T a, tr1::array<T,D> & b, tr1::array<T,D> & c)
{
for(int i=0; i<D; ++i)
{
c[i] += a* b[i];
}
}
int main()
{
/*
__m128i a, b, c;
int inp_sse1[4] __attribute__((aligned(16))) = { 2, 2, 2, 2 };
int inp_sse2[4] __attribute__((aligned(16))) = { 0, 1, 2, 3 };
int out_sse[4] __attribute__((aligned(16))) = {0, 0, 0, 0};
__m128i res = _mm_mul_epi32(a, b); */
int ** __restrict xx = allocate2D<int>(ITER,BETA);
int ** __restrict yy = allocate2D<int>(ITER,BETA);
for (int i=0; i< ITER; ++i)
{
for (int j=0; j< BETA; ++j)
{
xx[i][j] = j;
yy[i][j] = 0;
}
}
// tr1::array seems to be at least as fast as built-in C arrays
int a = 2;
tr1::array<int,BETA> * b = new tr1::array<int,BETA>[ITER];
tr1::array<int,BETA> * c = new tr1::array<int,BETA>[ITER](); // initialize to zero !
timeval tim;
gettimeofday(&tim, NULL);
double t1=tim.tv_sec+(tim.tv_usec/1000000.0);
int index = 0;
int * __restrict xxx = xx[index];
int * __restrict yyy = yy[index];
for(int i=0; i<ITER; ++i)
{
saxpy<BETA>(a, xxx, yyy);
}
gettimeofday(&tim, NULL);
double t2=tim.tv_sec+(tim.tv_usec/1000000.0);
printf("%.6lf seconds elapsed for gcc vector extensions\n", t2-t1);
copy(yy[0], yy[0]+BETA, ostream_iterator<float>( cout, " "));
cout << endl;
/*
ipackedvector av, bv, cv;
for (int i=0; i< ITER; ++i)
{
for (int j=0; j< BETA; ++j)
{
b[i][j] = j;
}
}
//float * test = new float[10]();
// note the empty set of parantheses as the initializer --> makes them default constructed
// The C++ standard says that: A default constructed POD type is zero-initialized,
//copy(test, test+10, ostream_iterator<float>( cout, " "));
//cout << endl;
//tr1::array<int,BETA> wtf = b[0] + c[0];
gettimeofday(&tim, NULL);
t1=tim.tv_sec+(tim.tv_usec/1000000.0);
for(int i=0; i<ITER; ++i)
{
//saxpy_array<BETA>(a, b[i], c[i]);
c[i] = c[i] + b[i];
}
gettimeofday(&tim, NULL);
t2=tim.tv_sec+(tim.tv_usec/1000000.0);
printf("%.6lf seconds elapsed for template unrolled loop\n", t2-t1);
copy(c[0].begin(), c[0].end(), ostream_iterator<int>( cout, " "));
cout << endl;*/
// ipackedvector av, bv, cv;
// for (int i=0; i<BETA; ++i)
// {
// av.f[i] = 2;
// bv.f[i] = i;
// cv.f[i] = 0;
// }
// gettimeofday(&tim, NULL);
// t1=tim.tv_sec+(tim.tv_usec/1000000.0);
// for(int i=0; i<ITER; ++i)
// {
// cv.v += av.v * bv.v;
// }
// gettimeofday(&tim, NULL);
// t2=tim.tv_sec+(tim.tv_usec/1000000.0);
// printf("%.6lf seconds elapsed for gcc vector extensions\n", t2-t1);
// copy(cv.f, cv.f+BETA, ostream_iterator<int>( cout, " "));
// cout << endl;
/*
vector<int> tvec;
tvec.reserve(10);
tvec[5] = 5;
cout << tvec.size() << " " << tvec.capacity() << endl; */
return 0;
}
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