MIPS64: Add big-endian support for mips64.

src/mips64/code-stubs-mips64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_MIPS64
 
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
 #include "src/ic/handler-compiler.h"
@@ skipping 164 matching lines @@
     __ Branch(&error, ne, scratch, Operand(zero_reg));
     __ Move(result_reg, scratch3);
     __ Branch(&done);
     __ bind(&error);
   }
 
   // Load the double value and perform a manual truncation.
   Register input_high = scratch2;
   Register input_low = scratch3;
 
-  __ lw(input_low, MemOperand(input_reg, double_offset));
-  __ lw(input_high, MemOperand(input_reg, double_offset + kIntSize));
+  __ lw(input_low,
+        MemOperand(input_reg, double_offset + Register::kMantissaOffset));
+  __ lw(input_high,
+        MemOperand(input_reg, double_offset + Register::kExponentOffset));
 
   Label normal_exponent, restore_sign;
   // Extract the biased exponent in result.
   __ Ext(result_reg,
          input_high,
          HeapNumber::kExponentShift,
          HeapNumber::kExponentBits);
 
   // Check for Infinity and NaNs, which should return 0.
   __ Subu(scratch, result_reg, HeapNumber::kExponentMask);
@@ skipping 3105 matching lines @@
   // a0: object
   // a1: instance type.
   __ Branch(&not_heap_number, ne, a1, Operand(HEAP_NUMBER_TYPE));
   __ Ret(USE_DELAY_SLOT);
   __ mov(v0, a0);
   __ bind(&not_heap_number);
 
   Label not_string, slow_string;
   __ Branch(&not_string, hs, a1, Operand(FIRST_NONSTRING_TYPE));
   // Check if string has a cached array index.
-  __ ld(a2, FieldMemOperand(a0, String::kHashFieldOffset));
+  __ lwu(a2, FieldMemOperand(a0, String::kHashFieldOffset));
   __ And(at, a2, Operand(String::kContainsCachedArrayIndexMask));
   __ Branch(&slow_string, ne, at, Operand(zero_reg));
   __ IndexFromHash(a2, a0);
   __ Ret(USE_DELAY_SLOT);
   __ mov(v0, a0);
   __ bind(&slow_string);
   __ push(a0);  // Push argument.
   __ TailCallRuntime(Runtime::kStringToNumber, 1, 1);
   __ bind(&not_string);
 
@@ skipping 2272 matching lines @@
   // ----------- S t a t e -------------
   //  -- a0                  : callee
   //  -- a4                  : call_data
   //  -- a2                  : holder
   //  -- a1                  : api_function_address
   //  -- a3                  : number of arguments if argc is a register
   //  -- cp                  : context
   //  --
   //  -- sp[0]               : last argument
   //  -- ...
-  //  -- sp[(argc - 1)* 4]   : first argument
-  //  -- sp[argc * 4]        : receiver
+  //  -- sp[(argc - 1)* 8]   : first argument
+  //  -- sp[argc * 8]        : receiver
   // -----------------------------------
 
   Register callee = a0;
   Register call_data = a4;
   Register holder = a2;
   Register api_function_address = a1;
   Register context = cp;
 
   typedef FunctionCallbackArguments FCA;
 
@@ skipping 38 matching lines @@
   // Arguments is after the return address.
   __ Daddu(a0, sp, Operand(1 * kPointerSize));
   // FunctionCallbackInfo::implicit_args_
   __ sd(scratch, MemOperand(a0, 0 * kPointerSize));
   if (argc.is_immediate()) {
     // FunctionCallbackInfo::values_
     __ Daddu(at, scratch,
              Operand((FCA::kArgsLength - 1 + argc.immediate()) * kPointerSize));
     __ sd(at, MemOperand(a0, 1 * kPointerSize));
     // FunctionCallbackInfo::length_ = argc
+    // Stored as int field, 32-bit integers within struct on stack always left
+    // justified by n64 ABI.
     __ li(at, Operand(argc.immediate()));
-    __ sd(at, MemOperand(a0, 2 * kPointerSize));
+    __ sw(at, MemOperand(a0, 2 * kPointerSize));
     // FunctionCallbackInfo::is_construct_call_ = 0
-    __ sd(zero_reg, MemOperand(a0, 3 * kPointerSize));
+    __ sw(zero_reg, MemOperand(a0, 2 * kPointerSize + kIntSize));
   } else {
     // FunctionCallbackInfo::values_
     __ dsll(at, argc.reg(), kPointerSizeLog2);
     __ Daddu(at, at, scratch);
     __ Daddu(at, at, Operand((FCA::kArgsLength - 1) * kPointerSize));
     __ sd(at, MemOperand(a0, 1 * kPointerSize));
     // FunctionCallbackInfo::length_ = argc
-    __ sd(argc.reg(), MemOperand(a0, 2 * kPointerSize));
+    // Stored as int field, 32-bit integers within struct on stack always left
+    // justified by n64 ABI.
+    __ sw(argc.reg(), MemOperand(a0, 2 * kPointerSize));
     // FunctionCallbackInfo::is_construct_call_
     __ Daddu(argc.reg(), argc.reg(), Operand(FCA::kArgsLength + 1));
     __ dsll(at, argc.reg(), kPointerSizeLog2);
-    __ sd(at, MemOperand(a0, 3 * kPointerSize));
+    __ sw(at, MemOperand(a0, 2 * kPointerSize + kIntSize));
   }
 
   ExternalReference thunk_ref =
       ExternalReference::invoke_function_callback(masm->isolate());
 
   AllowExternalCallThatCantCauseGC scope(masm);
   MemOperand context_restore_operand(
       fp, (2 + FCA::kContextSaveIndex) * kPointerSize);
   // Stores return the first js argument.
   int return_value_offset = 0;
@@ skipping 63 matching lines @@
                            MemOperand(fp, 6 * kPointerSize), NULL);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS64