Espresso 0.0.2a

lib/math.c

@@ -0,0 +1,37 @@
+#include <types.h>
+
+#include <math.h>
+
+
+static int ps_of_two[12] = { 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096 };
+
+bool is_low_power_of_two(int n)
+{
+  for (int i = 0; i < 11; i++)
+  {
+    if (n == ps_of_two[i])
+    {
+      return true;
+    }
+  }
+  
+  return false;
+}
+
+uint64_t int_pow(uint64_t base, uint32_t exp)
+{
+  uint64_t result = 1;
+
+  while (exp)
+  {
+    if (exp & 1)
+    {
+      result *= base;
+    }
+    
+    exp >>= 1;
+    base *= base;
+  }
+
+  return result;
+}