From a43149ec90bab79277ed67af00d9d53e1460c2b9 Mon Sep 17 00:00:00 2001
From: Amy Retzerau <amy.retzerau@gmail.com>
Date: Mon, 22 Dec 2025 13:22:56 +0100
Subject: [PATCH] feat: improved fastmath perf

---
 fastmath.hpp | 47 +++++++++++++++++++++--------------------------
 1 file changed, 21 insertions(+), 26 deletions(-)

diff --git a/fastmath.hpp b/fastmath.hpp
index 9b33226..e904eaa 100644
--- a/fastmath.hpp
+++ b/fastmath.hpp
@@ -26,62 +26,57 @@ struct decimal {
     constexpr decimal(double i) : i(TO_INT(i)) {}
     constexpr decimal(int32_t i) : i(i) {}
 
-    friend std::ostream &operator<<(std::ostream &os, const decimal &d) {
+    inline friend std::ostream &operator<<(std::ostream &os, const decimal &d) {
         return (os << TO_FLOAT(d.i));
     }
 
-    friend decimal operator+(const decimal &d1, const decimal &d2) {
+    inline friend decimal operator+(const decimal &d1, const decimal &d2) {
         return {d1.i + d2.i};
     }
-    decimal &operator+=(const decimal &d) { return (*this) = {i + d.i}; }
+    inline decimal &operator+=(const decimal &d) { return (*this) = {i + d.i}; }
 
-    friend decimal operator-(const decimal &d1, const decimal &d2) {
+    inline friend decimal operator-(const decimal &d1, const decimal &d2) {
         return {d1.i - d2.i};
     }
-    friend decimal operator-(const decimal &d) { return {-d.i}; }
+    inline friend decimal operator-(const decimal &d) { return {-d.i}; }
 
-    friend decimal operator*(const decimal &d1, const decimal &d2) {
+    inline friend decimal operator*(const decimal &d1, const decimal &d2) {
         return {MUL_F(d1.i, d2.i)};
     }
 
-    decimal &operator*=(const decimal &d) { return (*this) = {MUL_F(i, d.i)}; }
+    inline decimal &operator*=(const decimal &d) {
+        return (*this) = {MUL_F(i, d.i)};
+    }
 
-    friend decimal operator/(const decimal &d1, const decimal &d2) {
+    inline friend decimal operator/(const decimal &d1, const decimal &d2) {
         return {DIV_F(d1.i, d2.i)};
     }
 
-    friend bool operator<(const decimal &d1, const decimal &d2) {
+    inline friend bool operator<(const decimal &d1, const decimal &d2) {
         return d1.i < d2.i;
     }
 
-    friend bool operator>(const decimal &d1, const decimal &d2) {
+    inline friend bool operator>(const decimal &d1, const decimal &d2) {
         return d1.i > d2.i;
     }
-    friend bool operator<=(const decimal &d1, const decimal &d2) {
+    inline friend bool operator<=(const decimal &d1, const decimal &d2) {
         return d1.i <= d2.i;
     }
-    friend bool operator>=(const decimal &d1, const decimal &d2) {
+    inline friend bool operator>=(const decimal &d1, const decimal &d2) {
         return d1.i >= d2.i;
     }
 
-    friend bool operator==(const decimal &d1, const decimal &d2) {
+    inline friend bool operator==(const decimal &d1, const decimal &d2) {
         return d1.i == d2.i;
     }
-    friend bool operator!=(const decimal &d1, const decimal &d2) {
+    inline friend bool operator!=(const decimal &d1, const decimal &d2) {
         return d1.i != d2.i;
     }
-    decimal &operator=(decimal const &in) {
-        if (this != &in) {
-            std::destroy_at(this);
-            std::construct_at(this, in);
-        }
-        return *this;
-    }
 
-    decimal sqrt() { return {((int32_t)sqrtf(i)) << HALF_SHIFT}; }
+    inline decimal sqrt() { return {((int32_t)sqrtf(i)) << HALF_SHIFT}; }
 
-    float to_float() { return TO_FLOAT(i); }
-    bool isSmall() { return (abs(i) < (1 << (HALF_SHIFT - 1))); }
+    inline float to_float() { return TO_FLOAT(i); }
+    inline bool isSmall() { return (abs(i) < (1 << (HALF_SHIFT - 1))); }
 };
 
 template <int n, class Dev> struct vec {
@@ -165,10 +160,10 @@ template <int n, class Dev> struct vec {
         return v * d;
     }
 
-    decimal operator*(const vec<n, Dev> &vec) {
+    friend decimal operator*(const vec<n, Dev> &v1, const vec<n, Dev> &v2) {
         decimal res = {0};
         for (int i = 0; i < n; i++) {
-            res += vec.v[i] * v[i];
+            res += v1.v[i] * v2.v[i];
         }
         return res;
     }