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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_lanst_work( Params& params, bool run )
{
using real_t = blas::real_type< scalar_t >;
// get & mark input values
lapack::Norm norm = params.norm();
int64_t n = params.dim.n();
int64_t verbose = params.verbose();
// mark non-standard output values
params.ref_time();
// params.ref_gflops();
// params.gflops();
params.msg();
if (! run)
return;
// ---------- setup
size_t size_D = (size_t) (n);
size_t size_E = (size_t) (n-1);
std::vector< real_t > D( size_D );
std::vector< scalar_t > E( size_E );
int64_t idist = 1;
int64_t iseed[4] = { 0, 1, 2, 3 };
lapack::larnv( idist, iseed, D.size(), &D[0] );
lapack::larnv( idist, iseed, E.size(), &E[0] );
// ---------- run test
testsweeper::flush_cache( params.cache() );
double time = testsweeper::get_wtime();
real_t norm_tst = lapack::lanst( norm, n, &D[0], &E[0] );
time = testsweeper::get_wtime() - time;
params.time() = time;
// double gflop = lapack::Gflop< scalar_t >::lanst( norm, n );
// params.gflops() = gflop / time;
if (verbose >= 1) {
printf( "norm_tst = %.8e\n", norm_tst );
}
if (params.ref() == 'y' || params.check() == 'y') {
// ---------- run reference
testsweeper::flush_cache( params.cache() );
time = testsweeper::get_wtime();
real_t norm_ref = LAPACKE_lanst( to_char( norm ), n, &D[0], &E[0] );
time = testsweeper::get_wtime() - time;
params.ref_time() = time;
// params.ref_gflops() = gflop / time;
if (verbose >= 1) {
printf( "norm_ref = %.8e\n", norm_ref );
}
// ---------- check error compared to reference
real_t tol = 3 * std::numeric_limits< real_t >::epsilon();
if (norm == lapack::Norm::Max && ! blas::is_complex< scalar_t >::value) {
// max-norm depends on only one element, so in real there should be
// zero error, but in complex there's error in abs().
tol = 0;
}
real_t error = std::abs( norm_tst - norm_ref );
if (norm_ref != 0)
error /= norm_ref;
params.error() = error;
params.okay() = (error <= tol);
}
}
// -----------------------------------------------------------------------------
void test_lanst( Params& params, bool run )
{
switch (params.datatype()) {
case testsweeper::DataType::Single:
test_lanst_work< float >( params, run );
break;
case testsweeper::DataType::Double:
test_lanst_work< double >( params, run );
break;
case testsweeper::DataType::SingleComplex:
case testsweeper::DataType::DoubleComplex:
params.msg() = "skipping: no complex version";
break;
default:
throw std::runtime_error( "unknown datatype" );
break;
}
}
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