Fix CLO calculation for MIPS64. And a small code cleanup.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3428 c046a42c-6fe2-441c-8c8c-71466251a162

target-mips/op.c

@@ -543,9 +543,9 @@ void op_clo (void)
         T0 = 32;
     } else {
         for (n = 0; n < 32; n++) {
-            if (!(T0 & (1 << 31)))
+            if (!(((int32_t)T0) & (1 << 31)))
                 break;
-            T0 = T0 << 1;
+            T0 <<= 1;
         }
         T0 = n;
     }
@@ -562,7 +562,7 @@ void op_clz (void)
         for (n = 0; n < 32; n++) {
             if (T0 & (1 << 31))
                 break;
-            T0 = T0 << 1;
+            T0 <<= 1;
         }
         T0 = n;
     }
@@ -747,7 +747,7 @@ void op_dclo (void)
         for (n = 0; n < 64; n++) {
             if (!(T0 & (1ULL << 63)))
                 break;
-            T0 = T0 << 1;
+            T0 <<= 1;
         }
         T0 = n;
     }
@@ -764,7 +764,7 @@ void op_dclz (void)
         for (n = 0; n < 64; n++) {
             if (T0 & (1ULL << 63))
                 break;
-            T0 = T0 << 1;
+            T0 <<= 1;
         }
         T0 = n;
     }