MIPS: Use SmiTst and TrySmiTag MacroAssembler instructions.

src/mips/full-codegen-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 2898 matching lines @@
   VisitForAccumulatorValue(args->at(0));
 
   Label materialize_true, materialize_false;
   Label* if_true = NULL;
   Label* if_false = NULL;
   Label* fall_through = NULL;
   context()->PrepareTest(&materialize_true, &materialize_false,
                          &if_true, &if_false, &fall_through);
 
   PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
-  __ And(t0, v0, Operand(kSmiTagMask));
+  __ SmiTst(v0, t0);
   Split(eq, t0, Operand(zero_reg), if_true, if_false, fall_through);
 
   context()->Plug(if_true, if_false);
 }
 
 
 void FullCodeGenerator::EmitIsNonNegativeSmi(CallRuntime* expr) {
   ZoneList<Expression*>* args = expr->arguments();
   ASSERT(args->length() == 1);
 
   VisitForAccumulatorValue(args->at(0));
 
   Label materialize_true, materialize_false;
   Label* if_true = NULL;
   Label* if_false = NULL;
   Label* fall_through = NULL;
   context()->PrepareTest(&materialize_true, &materialize_false,
                          &if_true, &if_false, &fall_through);
 
   PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
-  __ And(at, v0, Operand(kSmiTagMask | 0x80000000));
+  __ NonNegativeSmiTst(v0, at);
   Split(eq, at, Operand(zero_reg), if_true, if_false, fall_through);
 
   context()->Plug(if_true, if_false);
 }
 
 
 void FullCodeGenerator::EmitIsObject(CallRuntime* expr) {
   ZoneList<Expression*>* args = expr->arguments();
   ASSERT(args->length() == 1);
 
@@ skipping 572 matching lines @@
   Register string = v0;
   Register index = a1;
   Register value = a2;
 
   VisitForStackValue(args->at(1));  // index
   VisitForStackValue(args->at(2));  // value
   VisitForAccumulatorValue(args->at(0));  // string
   __ Pop(index, value);
 
   if (FLAG_debug_code) {
-    __ And(at, value, Operand(kSmiTagMask));
+    __ SmiTst(value, at);
     __ ThrowIf(ne, kNonSmiValue, at, Operand(zero_reg));
-    __ And(at, index, Operand(kSmiTagMask));
+    __ SmiTst(index, at);
     __ ThrowIf(ne, kNonSmiIndex, at, Operand(zero_reg));
     __ SmiUntag(index, index);
     static const uint32_t one_byte_seq_type = kSeqStringTag | kOneByteStringTag;
     Register scratch = t5;
     __ EmitSeqStringSetCharCheck(
         string, index, value, scratch, one_byte_seq_type);
     __ SmiTag(index, index);
   }
 
   __ SmiUntag(value, value);
@@ skipping 14 matching lines @@
   Register string = v0;
   Register index = a1;
   Register value = a2;
 
   VisitForStackValue(args->at(1));  // index
   VisitForStackValue(args->at(2));  // value
   VisitForAccumulatorValue(args->at(0));  // string
   __ Pop(index, value);
 
   if (FLAG_debug_code) {
-    __ And(at, value, Operand(kSmiTagMask));
+    __ SmiTst(value, at);
     __ ThrowIf(ne, kNonSmiValue, at, Operand(zero_reg));
-    __ And(at, index, Operand(kSmiTagMask));
+    __ SmiTst(index, at);
     __ ThrowIf(ne, kNonSmiIndex, at, Operand(zero_reg));
     __ SmiUntag(index, index);
     static const uint32_t two_byte_seq_type = kSeqStringTag | kTwoByteStringTag;
     Register scratch = t5;
     __ EmitSeqStringSetCharCheck(
         string, index, value, scratch, two_byte_seq_type);
     __ SmiTag(index, index);
   }
 
   __ SmiUntag(value, value);
@@ skipping 1426 matching lines @@
       Assembler::target_address_at(pc_immediate_load_address)) ==
          reinterpret_cast<uint32_t>(
              isolate->builtins()->OsrAfterStackCheck()->entry()));
   return OSR_AFTER_STACK_CHECK;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS