Added support for MIPS in architecture independent files....

src/assembler.h

Index: src/assembler.h
===================================================================
--- src/assembler.h	(revision 3791)
+++ src/assembler.h	(working copy)
@@ -506,8 +506,10 @@
   return -(1 << (n-1)) <= x && x < (1 << (n-1));
 }
 
+static inline bool is_int8(int x)  { return is_intn(x, 8); }
+static inline bool is_int16(int x)  { return is_intn(x, 16); }
+static inline bool is_int18(int x)  { return is_intn(x, 18); }
 static inline bool is_int24(int x)  { return is_intn(x, 24); }
-static inline bool is_int8(int x)  { return is_intn(x, 8); }
 
 static inline bool is_uintn(int x, int n) {
   return (x & -(1 << n)) == 0;
@@ -519,10 +521,21 @@
 static inline bool is_uint5(int x)  { return is_uintn(x, 5); }
 static inline bool is_uint6(int x)  { return is_uintn(x, 6); }
 static inline bool is_uint8(int x)  { return is_uintn(x, 8); }
+static inline bool is_uint10(int x)  { return is_uintn(x, 10); }
 static inline bool is_uint12(int x)  { return is_uintn(x, 12); }
 static inline bool is_uint16(int x)  { return is_uintn(x, 16); }
 static inline bool is_uint24(int x)  { return is_uintn(x, 24); }
+static inline bool is_uint26(int x)  { return is_uintn(x, 26); }
+static inline bool is_uint28(int x)  { return is_uintn(x, 28); }
 
+static inline int NumberOfBitsSet(uint32_t x) {
+  unsigned int num_bits_set;
+  for (num_bits_set = 0; x; x >>= 1) {
+    num_bits_set += x & 1;
+  }
+  return num_bits_set;
+}
+
 } }  // namespace v8::internal
 
 #endif  // V8_ASSEMBLER_H_