NormalizeSum.h

/*
  ==============================================================================
    DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 
    Copyright 2023 by sonible GmbH.
 
    This file is part of VCTR - Versatile Container Templates Reconceptualized.
 
    VCTR is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License version 3
    only, as published by the Free Software Foundation.
 
    VCTR is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License version 3 for more details.
 
    You should have received a copy of the GNU Lesser General Public License
    version 3 along with VCTR.  If not, see <https://www.gnu.org/licenses/>.
  ==============================================================================
*/
 
namespace vctr::expressions
{
 
template <size_t extent, class SrcType>
requires is::realFloatNumber<ValueType<SrcType>>
class NormalizeSum : ExpressionTemplateBase
{
public:
    using value_type = ValueType<SrcType>;
 
    VCTR_COMMON_UNARY_EXPRESSION_MEMBERS (NormalizeSum, src)
 
    void applyRuntimeArgs()
    {
        srcSum = sum << src;
    }
 
    VCTR_FORCEDINLINE constexpr value_type operator[] (size_t i) const
    {
        VCTR_ASSERT (srcSum != value_type (0));
        VCTR_START_IGNORE_WARNING_MSVC (4723) // potential divide by 0
        return src[i] / srcSum;
        VCTR_END_IGNORE_WARNING_MSVC
    }
 
    //==============================================================================
    // Platform Vector Operation Implementation
    VCTR_FORCEDINLINE const value_type* evalNextVectorOpInExpressionChain (value_type* dst) const
    requires is::suitableForAccelerateRealFloatVectorOp<SrcType, value_type, detail::dontPreferIfIppAndAccelerateAreAvailable>
    {
        VCTR_ASSERT (srcSum != value_type (0));
        Expression::Accelerate::div (src.evalNextVectorOpInExpressionChain (dst), srcSum, dst, size());
        return dst;
    }
 
    VCTR_FORCEDINLINE const value_type* evalNextVectorOpInExpressionChain (value_type* dst) const
    requires is::suitableForIppRealFloatVectorOp<SrcType, value_type, detail::preferIfIppAndAccelerateAreAvailable>
    {
        VCTR_ASSERT (srcSum != value_type (0));
        Expression::IPP::div (src.evalNextVectorOpInExpressionChain (dst), srcSum, dst, size());
        return dst;
    }
 
private:
    //==============================================================================
    value_type srcSum = value_type (0);
};
 
}
 
namespace vctr
{
 
constexpr inline ExpressionChainBuilder<expressions::NormalizeSum> normalizeSum;
}