MIPS: Use SmiTst and TrySmiTag MacroAssembler instructions.

src/mips/code-stubs-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2951 matching lines @@
   // Check that the first argument is a JSRegExp object.
   __ lw(a0, MemOperand(sp, kJSRegExpOffset));
   STATIC_ASSERT(kSmiTag == 0);
   __ JumpIfSmi(a0, &runtime);
   __ GetObjectType(a0, a1, a1);
   __ Branch(&runtime, ne, a1, Operand(JS_REGEXP_TYPE));
 
   // Check that the RegExp has been compiled (data contains a fixed array).
   __ lw(regexp_data, FieldMemOperand(a0, JSRegExp::kDataOffset));
   if (FLAG_debug_code) {
-    __ And(t0, regexp_data, Operand(kSmiTagMask));
+    __ SmiTst(regexp_data, t0);
     __ Check(nz,
              kUnexpectedTypeForRegExpDataFixedArrayExpected,
              t0,
              Operand(zero_reg));
     __ GetObjectType(regexp_data, a0, a0);
     __ Check(eq,
              kUnexpectedTypeForRegExpDataFixedArrayExpected,
              a0,
              Operand(FIXED_ARRAY_TYPE));
   }
@@ skipping 3174 matching lines @@
   //  -- sp[0] : return address
   //  -- sp[4] : last argument
   // -----------------------------------
   if (FLAG_debug_code) {
     // The array construct code is only set for the global and natives
     // builtin Array functions which always have maps.
 
     // Initial map for the builtin Array function should be a map.
     __ lw(a3, FieldMemOperand(a1, JSFunction::kPrototypeOrInitialMapOffset));
     // Will both indicate a NULL and a Smi.
-    __ And(at, a3, Operand(kSmiTagMask));
+    __ SmiTst(a3, at);
     __ Assert(ne, kUnexpectedInitialMapForArrayFunction,
         at, Operand(zero_reg));
     __ GetObjectType(a3, a3, t0);
     __ Assert(eq, kUnexpectedInitialMapForArrayFunction,
         t0, Operand(MAP_TYPE));
 
     // We should either have undefined in a2 or a valid cell.
     Label okay_here;
     Handle<Map> cell_map = masm->isolate()->factory()->cell_map();
     __ LoadRoot(at, Heap::kUndefinedValueRootIndex);
@@ skipping 68 matching lines @@
   //  -- sp[4] : last argument
   // -----------------------------------
 
   if (FLAG_debug_code) {
     // The array construct code is only set for the global and natives
     // builtin Array functions which always have maps.
 
     // Initial map for the builtin Array function should be a map.
     __ lw(a3, FieldMemOperand(a1, JSFunction::kPrototypeOrInitialMapOffset));
     // Will both indicate a NULL and a Smi.
-    __ And(at, a3, Operand(kSmiTagMask));
+    __ SmiTst(a3, at);
     __ Assert(ne, kUnexpectedInitialMapForArrayFunction,
         at, Operand(zero_reg));
     __ GetObjectType(a3, a3, t0);
     __ Assert(eq, kUnexpectedInitialMapForArrayFunction,
         t0, Operand(MAP_TYPE));
   }
 
   // Figure out the right elements kind.
   __ lw(a3, FieldMemOperand(a1, JSFunction::kPrototypeOrInitialMapOffset));
 
@@ skipping 19 matching lines @@
   __ bind(&fast_elements_case);
   GenerateCase(masm, FAST_ELEMENTS);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS