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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>
#if LAPACK_VERSION >= 30600 // >= 3.6.0
// -----------------------------------------------------------------------------
template< typename scalar_t >
void test_gesvdx_work( Params& params, bool run )
{
using real_t = blas::real_type< scalar_t >;
// get & mark input values
lapack::Job jobu = params.jobz();
lapack::Job jobvt = params.jobvr();
int64_t m = params.dim.m();
int64_t n = params.dim.n();
int64_t align = params.align();
real_t vl; // = params.vl();
real_t vu; // = params.vu();
int64_t il; // = params.il();
int64_t iu; // = params.iu();
lapack::Range range; // derived from vl,vu,il,iu
params.get_range( n, &range, &vl, &vu, &il, &iu );
params.matrix.mark();
// mark non-standard output values
params.ref_time();
// params.ref_gflops();
// params.gflops();
params.msg();
if (! run)
return;
// skip invalid sizes
if (range == lapack::Range::Index
&& ! (1 <= il && il < iu && iu < blas::min( m, n ))) {
params.msg() = "skipping: requires 1 <= il <= iu <= min(m,n)";
return;
}
// ---------- setup
int64_t lda = roundup( blas::max( 1, m ), align );
int64_t ns_tst;
lapack_int ns_ref;
int64_t ldu = ( jobu == lapack::Job::Vec ? roundup( m, align ) : 1 );
int64_t ldvt = ( jobvt == lapack::Job::Vec ? roundup( blas::min( m, n ), align ) : 1 );
size_t size_A = (size_t) ( lda * n );
size_t size_S = (size_t) ( blas::min( m, n) );
size_t size_U = (size_t) ( ldu * blas::min( m, n ) );
size_t size_VT = (size_t) ( ldvt * n );
std::vector< scalar_t > A_tst( size_A );
std::vector< scalar_t > A_ref( size_A );
std::vector< real_t > S_tst( size_S );
std::vector< real_t > S_ref( size_S );
std::vector< scalar_t > U_tst( size_U );
std::vector< scalar_t > U_ref( size_U );
std::vector< scalar_t > VT_tst( size_VT );
std::vector< scalar_t > VT_ref( size_VT );
lapack::generate_matrix( params.matrix, m, n, &A_tst[0], lda );
A_ref = A_tst;
// ---------- run test
testsweeper::flush_cache( params.cache() );
double time = testsweeper::get_wtime();
int64_t info_tst = lapack::gesvdx( jobu, jobvt, range, m, n, &A_tst[0], lda, vl, vu, il, iu, &ns_tst, &S_tst[0], &U_tst[0], ldu, &VT_tst[0], ldvt );
time = testsweeper::get_wtime() - time;
if (info_tst != 0) {
fprintf( stderr, "lapack::gesvdx returned error %lld\n", llong( info_tst ) );
}
params.time() = time;
// double gflop = lapack::Gflop< scalar_t >::gesvdx( jobu, jobvt, range, m, 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_gesvdx( to_char( jobu ), to_char( jobvt ), to_char( range ), m, n, &A_ref[0], lda, vl, vu, il, iu, &ns_ref, &S_ref[0], &U_ref[0], ldu, &VT_ref[0], ldvt );
time = testsweeper::get_wtime() - time;
if (info_ref != 0) {
fprintf( stderr, "LAPACKE_gesvdx 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 += abs_error( A_tst, A_ref );
error += std::abs( ns_tst - ns_ref );
error += abs_error( S_tst, S_ref );
error += abs_error( U_tst, U_ref );
error += abs_error( VT_tst, VT_ref );
params.error() = error;
params.okay() = (error == 0); // expect lapackpp == lapacke
}
}
// -----------------------------------------------------------------------------
void test_gesvdx( Params& params, bool run )
{
switch (params.datatype()) {
case testsweeper::DataType::Single:
test_gesvdx_work< float >( params, run );
break;
case testsweeper::DataType::Double:
test_gesvdx_work< double >( params, run );
break;
case testsweeper::DataType::SingleComplex:
test_gesvdx_work< std::complex<float> >( params, run );
break;
case testsweeper::DataType::DoubleComplex:
test_gesvdx_work< std::complex<double> >( params, run );
break;
default:
throw std::runtime_error( "unknown datatype" );
break;
}
}
#else
// -----------------------------------------------------------------------------
void test_gesvdx( Params& params, bool run )
{
fprintf( stderr, "gesvdx requires LAPACK >= 3.6.0\n\n" );
exit(0);
}
#endif // LAPACK >= 3.6.0
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