Some changes to hadle different vector width

examples/intrinsics/sse4.h

@@ -179,6 +179,50 @@ FORCEINLINE __vec4_i64::__vec4_i64(__vec4_d vd) {
     v[1] = _mm_castpd_si128(vd.v[1]);
 }
 
+template <int num_bits>
+struct iN {
+    int num[num_bits / (sizeof (int) * 8)];
+
+    iN () {}
+
+    iN (const char *val) {
+      if (val == NULL)
+        return;
+      int length = num_bits / (sizeof (int) * 8);
+      int val_len = 0;
+      for (val_len = 0; val[val_len]; (val_len)++);
+      for (int i = 0; (i < val_len && i < num_bits); i++)
+        num[i / (sizeof (int) * 8)] = (num[i / (sizeof (int) * 8)] << 1) | (val[i] - '0');
+    }
+
+    ~iN () {}
+
+    iN operator >> (const iN rhs) {
+      iN res;
+      int length = num_bits / (sizeof (int) * 8);
+      int cells = rhs.num[0] / (sizeof(int) * 8);
+      for (int i = 0; i < (length - cells); i++)
+        res.num[i] = this->num[cells + i];
+      return res;
+    }
+
+    iN operator & (iN rhs) {
+      iN res;
+      int length = num_bits / (sizeof (int) * 8);
+      for (int i = 0; i < length; i++)
+        res.num[i] = (this->num[i]) & (rhs.num[i]);
+      return res;
+    }
+
+    operator uint32_t() { return this->num[0]; }
+};
+
+template <class T>
+T __cast_bits (T to, __vec4_i32 from) {
+  for (int i = 0; i < 16; i++)
+    to.num[i] = ((uint32_t*)(&from))[i] ;
+  return to;
+}
 
 ///////////////////////////////////////////////////////////////////////////
 // SSE helpers / utility functions