1 files changed, 158 insertions, 0 deletions
diff --git a/Client/ThirdParty/fpm/accuracy/accuracy.cpp b/Client/ThirdParty/fpm/accuracy/accuracy.cpp
new file mode 100644
index 0000000..a452e3c
--- /dev/null
+++ b/Client/ThirdParty/fpm/accuracy/accuracy.cpp
@@ -0,0 +1,158 @@
+#include <fpm/fixed.hpp>
+#include <fpm/math.hpp>
+#include <fixmath.h>
+#include <iostream>
+#include <fstream>
+#include <cmath>
+#include <string>
+
+static constexpr double PI = 3.1415926535897932384626433832795;
+
+using fpm::fixed_8_24;
+using fpm::fixed_16_16;
+using fpm::fixed_24_8;
+using fixed_20_12 = fpm::fixed<std::int32_t, std::int64_t, 12>;
+
+using std::sin;
+using std::cos;
+using std::tan;
+using std::asin;
+using std::acos;
+using std::atan;
+using std::atan2;
+using std::sqrt;
+
+static Fix16 sin(Fix16 x) { return x.sin(); }
+static Fix16 cos(Fix16 x) { return x.cos(); }
+static Fix16 tan(Fix16 x) { return x.tan(); }
+static Fix16 asin(Fix16 x) { return x.asin(); }
+static Fix16 acos(Fix16 x) { return x.acos(); }
+static Fix16 atan(Fix16 x) { return x.atan(); }
+static Fix16 atan2(Fix16 x, Fix16 y) { return x.atan2(y); }
+static Fix16 sqrt(Fix16 x) { return x.sqrt(); }
+static Fix16 exp(Fix16 x) { return fix16_exp(x); }
+static Fix16 log(Fix16 x) { return fix16_log(x); }
+static Fix16 log2(Fix16 x) { return fix16_log2(x); }
+
+class csv_output
+{
+public:
+    explicit csv_output(const std::string& filename)
+        : m_stream(filename)
+    {
+        m_stream.setf(std::ios::fixed);
+        m_stream.precision(12);
+        m_stream << "x,real,Q24.8,Q20.12,Q16.16,Q8.24,fix16\n";
+    }
+
+    void write_row(double x, double y_real, double y_q24_8, double y_q20_12, double y_q16_16, double y_q8_24, double y_fix16)
+    {
+        m_stream << x << "," << y_real << "," << y_q24_8 << "," << y_q20_12 << "," << y_q16_16 << "," << y_q8_24 << "," << y_fix16 << "\n";
+    }
+
+    void write_row(double x, double y_real, double y_q24_8, double y_q20_12, double y_q16_16, double y_q8_24)
+    {
+        m_stream << x << "," << y_real << "," << y_q24_8 << "," << y_q20_12 << "," << y_q16_16 << "," << y_q8_24 << ",-\n";
+    }
+
+private:
+    std::ofstream m_stream;
+};
+
+template <typename Callable, typename... Args>
+static void check_all(csv_output& output, double value, Callable&& callable, Args&& ...args)
+{
+    output.write_row(value,
+        callable(std::forward<Args>(args)...),
+        static_cast<double>(callable(fixed_24_8(std::forward<Args>(args))...)),
+        static_cast<double>(callable(fixed_20_12(std::forward<Args>(args))...)),
+        static_cast<double>(callable(fixed_16_16(std::forward<Args>(args))...)),
+        static_cast<double>(callable(fixed_8_24(std::forward<Args>(args))...)),
+        static_cast<double>(callable(Fix16(std::forward<Args>(args))...)));
+}
+
+template <typename Callable, typename... Args>
+static void check_fpm(csv_output& output, double value, Callable&& callable, Args&& ...args)
+{
+    output.write_row(value,
+        callable(std::forward<Args>(args)...),
+        static_cast<double>(callable(fixed_24_8(std::forward<Args>(args))...)),
+        static_cast<double>(callable(fixed_20_12(std::forward<Args>(args))...)),
+        static_cast<double>(callable(fixed_16_16(std::forward<Args>(args))...)),
+        static_cast<double>(callable(fixed_8_24(std::forward<Args>(args))...)));
+}
+
+int main()
+{
+    csv_output out_sin("sin.csv");
+    csv_output out_cos("cos.csv");
+    csv_output out_tan("tan.csv");
+    csv_output out_atan2("atan2.csv");
+    for (int angle = -179; angle <= 180; ++angle)
+    {
+        const double val = angle * PI / 180.0;
+
+        check_all(out_sin, val, [](auto x) { return sin(x); }, val);
+        check_all(out_cos, val, [](auto x) { return cos(x); }, val);
+        if ((angle + 90) % 180 != 0)
+        {
+            check_all(out_tan, val, [](auto x) { return tan(x); }, val);
+        }
+
+        const auto y = std::sin(val);
+        const auto x = std::cos(val);
+        check_all(out_atan2, val, [](auto y, auto x) { return atan2(y, x); }, y, x);
+    }
+
+    csv_output out_asin("asin.csv");
+    csv_output out_acos("acos.csv");
+    for (int value = -100; value <= 100; ++value)
+    {
+        const double val = value / 100.0;
+        check_all(out_asin, val, [](auto x) { return asin(x); }, val);
+        check_all(out_acos, val, [](auto x) { return acos(x); }, val);
+    }
+
+    csv_output out_atan("atan.csv");
+    for (int value = -5000; value <= 5000; value += 5)
+    {
+        const double val = value / 1000.0;
+        check_all(out_atan, val, [](auto x) { return atan(x); }, val);
+    }
+
+    csv_output out_sqrt("sqrt.csv");
+    for (int i = 0; i < 1000; ++i)
+    {
+        const auto val = i / 10.0;
+        check_all(out_sqrt, val, [](auto x) { return sqrt(x); }, val);
+    }
+
+    csv_output out_cbrt("cbrt.csv");
+    for (int i = -1000; i < 1000; ++i)
+    {
+        const auto val = i / 10.0;
+        check_fpm(out_cbrt, val, [](auto x) { return cbrt(x); }, val);
+    }
+
+    csv_output out_exp("exp.csv");
+    csv_output out_exp2("exp2.csv");
+    csv_output out_pow("pow.csv");
+    for (int i = -40; i <= 40; i++)
+    {
+        const auto val = i / 10.0;
+        check_all(out_exp, val, [](auto x) { return exp(x); }, val);
+        check_fpm(out_exp2, val, [](auto x) { return exp2(x); }, val);
+        check_fpm(out_pow, val, [](auto x) { return pow(decltype(x){3.36}, x); }, val);
+    }
+
+    csv_output out_log("log.csv");
+    csv_output out_log2("log2.csv");
+    csv_output out_log10("log10.csv");
+    for (int i = 1; i < 1000; i++)
+    {
+        const auto val = i / 10.0;
+        check_all(out_log, val, [](auto x) { return log(x); }, val);
+        check_all(out_log2, val, [](auto x) { return log2(x); }, val);
+        check_fpm(out_log10, val, [](auto x) { return log10(x); }, val);
+    }
+}