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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_unmhr_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
lapack::Side side = params.side();
lapack::Op trans = params.trans();
int64_t m = params.dim.m();
int64_t n = params.dim.n();
int64_t align = params.align();
real_t tol = params.tol() * eps;
params.matrix.mark();
// mark non-standard output values
params.ref_time();
// params.ref_gflops();
// params.gflops();
if (! run)
return;
// ---------- setup
// C is m-by-n
// if left, A is m-by-m (r-by-r)
// if right, A is n-by-n (r-by-r)
int64_t r = ( side == lapack::Side::Left ? m : n );
int64_t lda = roundup( blas::max( 1, r ), align );
int64_t ldc = roundup( blas::max( 1, m ), align );
size_t size_A = (size_t) ( lda * r );
size_t size_tau = (size_t) ( r - 1 );
size_t size_C = (size_t) ( ldc * n );
// r >= ihi >= ilo >= 1
int64_t ilo = 1;
int64_t ihi = r;
std::vector< scalar_t > A( size_A );
std::vector< scalar_t > tau( size_tau );
std::vector< scalar_t > C_tst( size_C );
std::vector< scalar_t > C_ref( size_C );
lapack::generate_matrix( params.matrix, r, r, &A[0], lda );
int64_t idist = 1;
int64_t iseed[4] = { 0, 1, 2, 3 };
lapack::larnv( idist, iseed, tau.size(), &tau[0] );
lapack::larnv( idist, iseed, C_tst.size(), &C_tst[0] );
// reduce A to Hessenberg form
int64_t info_hrd = lapack::gehrd( r, ilo, ihi, &A[0], lda, &tau[0] );
if (info_hrd != 0) {
fprintf( stderr, "lapack::gehrd returned error %lld\n", llong( info_hrd ) );
}
C_ref = C_tst;
// ---------- run test
testsweeper::flush_cache( params.cache() );
double time = testsweeper::get_wtime();
int64_t info_tst = lapack::unmhr( side, trans, m, n, ilo, ihi, &A[0], lda, &tau[0], &C_tst[0], ldc );
time = testsweeper::get_wtime() - time;
if (info_tst != 0) {
fprintf( stderr, "lapack::unmhr returned error %lld\n", llong( info_tst ) );
}
params.time() = time;
// double gflop = lapack::Gflop< scalar_t >::unmhr( side, trans, m, n, ilo, ihi );
// 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_unmhr( to_char( side ), to_char( trans ), m, n, ilo, ihi, &A[0], lda, &tau[0], &C_ref[0], ldc );
time = testsweeper::get_wtime() - time;
if (info_ref != 0) {
fprintf( stderr, "LAPACKE_unmhr 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( C_tst, C_ref ) );
params.error() = error;
params.okay() = (error < tol);
}
}
// -----------------------------------------------------------------------------
void test_unmhr( Params& params, bool run )
{
switch (params.datatype()) {
case testsweeper::DataType::Single:
test_unmhr_work< float >( params, run );
break;
case testsweeper::DataType::Double:
test_unmhr_work< double >( params, run );
break;
case testsweeper::DataType::SingleComplex:
test_unmhr_work< std::complex<float> >( params, run );
break;
case testsweeper::DataType::DoubleComplex:
test_unmhr_work< std::complex<double> >( params, run );
break;
default:
throw std::runtime_error( "unknown datatype" );
break;
}
}
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