Make ldrd and strd instructions take two register arguments

src/arm/full-codegen-arm.cc

 // Copyright 2009 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 915 matching lines @@
   __ bind(&fixed_array);
   __ mov(r1, Operand(Smi::FromInt(0)));  // Map (0) - force slow check.
   __ Push(r1, r0);
   __ ldr(r1, FieldMemOperand(r0, FixedArray::kLengthOffset));
   __ mov(r0, Operand(Smi::FromInt(0)));
   __ Push(r1, r0);  // Fixed array length (as smi) and initial index.
 
   // Generate code for doing the condition check.
   __ bind(&loop);
   // Load the current count to r0, load the length to r1.
-  __ ldrd(r0, MemOperand(sp, 0 * kPointerSize));
+  __ ldrd(r0, r1, MemOperand(sp, 0 * kPointerSize));
   __ cmp(r0, r1);  // Compare to the array length.
   __ b(hs, loop_statement.break_target());
 
   // Get the current entry of the array into register r3.
   __ ldr(r2, MemOperand(sp, 2 * kPointerSize));
   __ add(r2, r2, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
   __ ldr(r3, MemOperand(r2, r0, LSL, kPointerSizeLog2 - kSmiTagSize));
 
   // Get the expected map from the stack or a zero map in the
   // permanent slow case into register r2.
@@ skipping 2185 matching lines @@
   __ mov(r1, Operand(r1, ASR, 1));  // Un-smi-tag value.
   __ add(pc, r1, Operand(masm_->CodeObject()));
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM