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usr/lib/libcervus/math/pow.c

@@ -0,0 +1,37 @@
+#include <math.h>
+
+double pow(double x, double y) {
+    if (y == 0.0) return 1.0;
+    
+    if (y == (int)y) {
+        int n = (int)y;
+        double result = 1.0;
+        
+        if (n > 0) {
+            for (int i = 0; i < n; i++) {
+                result *= x;
+            }
+        } else {
+            for (int i = 0; i < -n; i++) {
+                result /= x;
+            }
+        }
+        
+        return result;
+    }
+    
+    if (x > 0.0) {
+        int int_part = (int)y;
+        double frac_part = y - int_part;
+        
+        double int_pow = pow(x, int_part);
+        
+        if (frac_part > 0.0) {
+            return int_pow * (1.0 + frac_part * (x - 1.0));
+        } else {
+            return int_pow / (1.0 - frac_part * (x - 1.0));
+        }
+    }
+    
+    return NAN;
+}