// exp2.cpp — numerical double exp2 (wiring fallback) + P3 asset note.
// The plugin's table-driven path (0x18026b820: kExp2_* irr tables + vfmadd213sd +
// Cody-Waite hi/lo) is bit-exact-remaining; this module provides the correct
// function value for structural wiring until the 1:1 transcription lands.
#include "exp2.hpp"
#include <cmath>
#include <cstdint>
#include <cstring>
#include <limits>

namespace exp2d {

double exp2_dsp(double x) {
    if (std::isnan(x)) return x;
    if (x == 0.0) return 1.0;
    if (x == -std::numeric_limits<double>::infinity()) return 0.0;
    if (x ==  std::numeric_limits<double>::infinity()) return x;
    return std::exp2(x);
}

}  // namespace exp2d