nrm2.hpp

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//
// Copyright (c) 2017-2021, University of Tennessee. All rights reserved.
// Copyright (c) 2021-2023, University of Colorado Denver. All rights reserved.
//
// This file is part of <T>LAPACK.
// <T>LAPACK 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.
 
#ifndef TLAPACK_LEGACY_NRM2_HH
#define TLAPACK_LEGACY_NRM2_HH
 
#include "tlapack/blas/nrm2.hpp"
#include "tlapack/legacy_api/base/types.hpp"
#include "tlapack/legacy_api/base/utils.hpp"
 
namespace tlapack {
namespace legacy {
 
    template <typename T>
    real_type<T> nrm2(idx_t n, T const* x, int_t incx)
    {
        tlapack_check_false(incx <= 0);
 
        // quick return
        if (n <= 0) return 0;
 
        tlapack_expr_with_vector_positiveInc(x_, T, n, x, incx,
                                             return nrm2(x_));
    }
 
}  // namespace legacy
}  // namespace tlapack
 
#endif  // #ifndef TLAPACK_LEGACY_NRM2_HH