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// Copyright (c) 2017-2023, University of Tennessee. All rights reserved.
// SPDX-License-Identifier: BSD-3-Clause
// This program is free software: you can redistribute it and/or modify it under
// the terms of the BSD 3-Clause license. See the accompanying LICENSE file.
#include "test.hh"
#include "lapack.hh"
#include "lapack/flops.hh"
#include "print_matrix.hh"
#include "error.hh"
#include "lapacke_wrappers.hh"
#include <vector>
// -----------------------------------------------------------------------------
template< typename scalar_t >
void test_hpgst_work( Params& params, bool run )
{
using real_t = blas::real_type< scalar_t >;
// Constants
real_t eps = std::numeric_limits<real_t>::epsilon();
// get & mark input values
int64_t itype = params.itype();
lapack::Uplo uplo = params.uplo();
int64_t n = params.dim.n();
real_t tol = params.tol() * eps;
// mark non-standard output values
params.ref_time();
// params.ref_gflops();
// params.gflops();
if (! run)
return;
// ---------- setup
size_t size_AP = (size_t) (n*(n+1)/2);
size_t size_BP = (size_t) (n*(n+1)/2);
std::vector< scalar_t > AP_tst( size_AP );
std::vector< scalar_t > AP_ref( size_AP );
std::vector< scalar_t > BP( size_BP );
int64_t idist = 1;
int64_t iseed[4] = { 0, 1, 2, 3 };
lapack::larnv( idist, iseed, AP_tst.size(), &AP_tst[0] );
lapack::larnv( idist, iseed, BP.size(), &BP[0] );
// diagonally dominant -> positive definite
if (uplo == lapack::Uplo::Upper) {
for (int64_t i = 0; i < n; ++i) {
BP[ i + 0.5*(i+1)*i ] += n;
}
}
else { // lower
for (int64_t i = 0; i < n; ++i) {
BP[ i + n*i - 0.5*i*(i+1) ] += n;
}
}
// Factor BP
int64_t info_trf = lapack::pptrf( uplo, n, &BP[0] );
if (info_trf != 0) {
fprintf( stderr, "lapack::pptrf returned error %lld\n", llong( info_trf ) );
}
AP_ref = AP_tst;
// ---------- run test
testsweeper::flush_cache( params.cache() );
double time = testsweeper::get_wtime();
int64_t info_tst = lapack::hpgst( itype, uplo, n, &AP_tst[0], &BP[0] );
time = testsweeper::get_wtime() - time;
if (info_tst != 0) {
fprintf( stderr, "lapack::hpgst returned error %lld\n", llong( info_tst ) );
}
params.time() = time;
// double gflop = lapack::Gflop< scalar_t >::hpgst( itype, n );
// params.gflops() = gflop / time;
if (params.ref() == 'y' || params.check() == 'y') {
// ---------- run reference
testsweeper::flush_cache( params.cache() );
time = testsweeper::get_wtime();
int64_t info_ref = LAPACKE_hpgst( itype, to_char( uplo ), n, &AP_ref[0], &BP[0] );
time = testsweeper::get_wtime() - time;
if (info_ref != 0) {
fprintf( stderr, "LAPACKE_hpgst returned error %lld\n", llong( info_ref ) );
}
params.ref_time() = time;
// params.ref_gflops() = gflop / time;
// ---------- check error compared to reference
real_t error = 0;
if (info_tst != info_ref) {
error = 1;
}
error = blas::max( error, rel_error( AP_tst, AP_ref ) );
params.error() = error;
params.okay() = (error < tol);
}
}
// -----------------------------------------------------------------------------
void test_hpgst( Params& params, bool run )
{
switch (params.datatype()) {
case testsweeper::DataType::Single:
test_hpgst_work< float >( params, run );
break;
case testsweeper::DataType::Double:
test_hpgst_work< double >( params, run );
break;
case testsweeper::DataType::SingleComplex:
test_hpgst_work< std::complex<float> >( params, run );
break;
case testsweeper::DataType::DoubleComplex:
test_hpgst_work< std::complex<double> >( params, run );
break;
default:
throw std::runtime_error( "unknown datatype" );
break;
}
}
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