40 lines
669 B
C++
40 lines
669 B
C++
// This code is in the public domain -- Ignacio Castaño <castano@gmail.com>
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#pragma once
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#ifndef NV_MATH_KAHANSUM_H
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#define NV_MATH_KAHANSUM_H
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#include "nvmath.h"
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namespace nv
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{
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class KahanSum
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{
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public:
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KahanSum() : accum(0.0f), err(0) {};
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void add(float f)
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{
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float compensated = f + err;
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float tmp = accum + compensated;
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err = accum - tmp;
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err += compensated;
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accum = tmp;
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}
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float sum() const
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{
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return accum;
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}
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private:
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float accum;
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float err;
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};
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} // nv namespace
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#endif // NV_MATH_KAHANSUM_H
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