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Half precision conversion

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This commit is contained in:
paboyle
2017-04-12 19:32:37 +01:00
parent b12dc89d26
commit cb6b81ae82
6 changed files with 261 additions and 20 deletions
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76
tests/Test_simd.cc
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@@ -478,12 +478,19 @@ void ExchangeTester(const functor &func)
assert(found==1);
}
/*
for(int i=0;i<Nsimd;i++){
std::cout << " i "<< i
<<" test1 "<<test1[i]
<<" test2 "<<test2[i]
<<" input1 "<<input1[i]
<<" input2 "<<input2[i]<<std::endl;
}
*/
for(int i=0;i<Nsimd;i++){
assert(test1[i]==input1[i]);
assert(test2[i]==input2[i]);
}// std::cout << " i "<< i<<" test1"<<test1[i]<<" "<<input1[i]<<std::endl;
// std::cout << " i "<< i<<" test2"<<test2[i]<<" "<<input2[i]<<std::endl;
// }
}
}
@@ -678,5 +685,68 @@ int main (int argc, char ** argv)
IntTester(funcMinus());
IntTester(funcTimes());
std::cout<<GridLogMessage << "==================================="<< std::endl;
std::cout<<GridLogMessage << "Testing precisionChange "<< std::endl;
std::cout<<GridLogMessage << "==================================="<< std::endl;
{
GridSerialRNG sRNG;
sRNG.SeedFixedIntegers(std::vector<int>({45,12,81,9}));
const int Ndp = 16;
const int Nsp = Ndp/2;
const int Nhp = Ndp/4;
std::vector<vRealH,alignedAllocator<vRealH> > H (Nhp);
std::vector<vRealF,alignedAllocator<vRealF> > F (Nsp);
std::vector<vRealF,alignedAllocator<vRealF> > FF(Nsp);
std::vector<vRealD,alignedAllocator<vRealD> > D (Ndp);
std::vector<vRealD,alignedAllocator<vRealD> > DD(Ndp);
for(int i=0;i<16;i++){
random(sRNG,D[i]);
}
// Double to Single
precisionChange(&F[0],&D[0],Ndp);
precisionChange(&DD[0],&F[0],Ndp);
std::cout << GridLogMessage<<"Double to single";
for(int i=0;i<Ndp;i++){
// std::cout << "DD["<<i<<"] = "<< DD[i]<<" "<<D[i]<<" "<<DD[i]-D[i] <<std::endl;
DD[i] = DD[i] - D[i];
decltype(innerProduct(DD[0],DD[0])) nrm;
nrm = innerProduct(DD[i],DD[i]);
auto tmp = Reduce(nrm);
// std::cout << tmp << std::endl;
assert( tmp < 1.0e-14 );
}
std::cout <<" OK ! "<<std::endl;
// Double to Half
std::cout << GridLogMessage<< "Double to half" ;
precisionChange(&H[0],&D[0],Ndp);
precisionChange(&DD[0],&H[0],Ndp);
for(int i=0;i<Ndp;i++){
// std::cout << "DD["<<i<<"] = "<< DD[i]<<" "<<D[i]<<" "<<DD[i]-D[i]<<std::endl;
DD[i] = DD[i] - D[i];
decltype(innerProduct(DD[0],DD[0])) nrm;
nrm = innerProduct(DD[i],DD[i]);
auto tmp = Reduce(nrm);
// std::cout << tmp << std::endl;
assert( tmp < 1.0e-6 );
}
std::cout <<" OK ! "<<std::endl;
std::cout << GridLogMessage<< "Single to half";
// Single to Half
precisionChange(&H[0] ,&F[0],Nsp);
precisionChange(&FF[0],&H[0],Nsp);
for(int i=0;i<Nsp;i++){
// std::cout << "FF["<<i<<"] = "<< FF[i]<<" "<<F[i]<<" "<<FF[i]-F[i]<<std::endl;
FF[i] = FF[i] - F[i];
decltype(innerProduct(FF[0],FF[0])) nrm;
nrm = innerProduct(FF[i],FF[i]);
auto tmp = Reduce(nrm);
// std::cout << tmp << std::endl;
assert( tmp < 1.0e-6 );
}
std::cout <<" OK ! "<<std::endl;
}
Grid_finalize();
}