MIPS: Enable aligned keyed stores and loads for double arrays.

src/mips/lithium-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 3077 matching lines @@
   }
 }
 
 
 void LCodeGen::DoLoadKeyedFixedDoubleArray(LLoadKeyed* instr) {
   Register elements = ToRegister(instr->elements());
   bool key_is_constant = instr->key()->IsConstantOperand();
   Register key = no_reg;
   DoubleRegister result = ToDoubleRegister(instr->result());
   Register scratch = scratch0();
+  bool aligned = FLAG_enable_aligned_doubles;
 
   int element_size_shift = ElementsKindToShiftSize(FAST_DOUBLE_ELEMENTS);
 
   int base_offset =
       FixedDoubleArray::kHeaderSize - kHeapObjectTag +
       (instr->additional_index() << element_size_shift);
   if (key_is_constant) {
     int constant_key = ToInteger32(LConstantOperand::cast(instr->key()));
     if (constant_key & 0xF0000000) {
       Abort(kArrayIndexConstantValueTooBig);
     }
     base_offset += constant_key << element_size_shift;
   }
   __ Addu(scratch, elements, Operand(base_offset));
 
   if (!key_is_constant) {
     key = ToRegister(instr->key());
     int shift_size = (instr->hydrogen()->key()->representation().IsSmi())
         ? (element_size_shift - kSmiTagSize) : element_size_shift;
     __ sll(at, key, shift_size);
     __ Addu(scratch, scratch, at);
   }
 
-  __ ldc1(result, MemOperand(scratch));
+  __ ldc1(result, MemOperand(scratch), aligned);
 
   if (instr->hydrogen()->RequiresHoleCheck()) {
     __ lw(scratch, MemOperand(scratch, sizeof(kHoleNanLower32)));
     DeoptimizeIf(eq, instr->environment(), scratch, Operand(kHoleNanUpper32));
   }
 }
 
 
 void LCodeGen::DoLoadKeyedFixedArray(LLoadKeyed* instr) {
   Register elements = ToRegister(instr->elements());
@@ skipping 1162 matching lines @@
 }
 
 
 void LCodeGen::DoStoreKeyedFixedDoubleArray(LStoreKeyed* instr) {
   DoubleRegister value = ToDoubleRegister(instr->value());
   Register elements = ToRegister(instr->elements());
   Register scratch = scratch0();
   DoubleRegister double_scratch = double_scratch0();
   bool key_is_constant = instr->key()->IsConstantOperand();
   Label not_nan, done;
+  bool aligned = FLAG_enable_aligned_doubles;
 
   // Calculate the effective address of the slot in the array to store the
   // double value.
   int element_size_shift = ElementsKindToShiftSize(FAST_DOUBLE_ELEMENTS);
   if (key_is_constant) {
     int constant_key = ToInteger32(LConstantOperand::cast(instr->key()));
     if (constant_key & 0xF0000000) {
       Abort(kArrayIndexConstantValueTooBig);
     }
     __ Addu(scratch, elements,
@@ skipping 18 matching lines @@
     __ bind(&is_nan);
     __ Move(double_scratch,
             FixedDoubleArray::canonical_not_the_hole_nan_as_double());
     __ sdc1(double_scratch, MemOperand(scratch, instr->additional_index() <<
         element_size_shift));
     __ Branch(&done);
   }
 
   __ bind(&not_nan);
   __ sdc1(value, MemOperand(scratch, instr->additional_index() <<
-      element_size_shift));
+      element_size_shift), aligned);
   __ bind(&done);
 }
 
 
 void LCodeGen::DoStoreKeyedFixedArray(LStoreKeyed* instr) {
   Register value = ToRegister(instr->value());
   Register elements = ToRegister(instr->elements());
   Register key = instr->key()->IsRegister() ? ToRegister(instr->key())
       : no_reg;
   Register scratch = scratch0();
@@ skipping 1463 matching lines @@
   __ Subu(scratch, result, scratch);
   __ lw(result, FieldMemOperand(scratch,
                                 FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal