A64: Implement Peek/PokePair

src/a64/full-codegen-a64.cc

 // Copyright 2013 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 1173 matching lines @@
   __ Mov(x1, Operand(Smi::FromInt(0)));  // Zero indicates proxy.
   __ Bind(&non_proxy);
   __ Push(x1, x0);  // Smi and array
   __ Ldr(x1, FieldMemOperand(x0, FixedArray::kLengthOffset));
   __ Push(x1, xzr);  // Fixed array length (as smi) and initial index.
 
   // Generate code for doing the condition check.
   PrepareForBailoutForId(stmt->BodyId(), NO_REGISTERS);
   __ Bind(&loop);
   // Load the current count to x0, load the length to x1.
-  // TODO(jbramley): Consider making something like PeekPair.
-  __ Ldp(x0, x1, MemOperand(jssp));
+  __ PeekPair(x0, x1, 0);
   __ Cmp(x0, x1);  // Compare to the array length.
   __ B(hs, loop_statement.break_label());
 
   // Get the current entry of the array into register r3.
   __ Peek(x10, 2 * kXRegSizeInBytes);
   __ Add(x10, x10, Operand::UntagSmiAndScale(x0, kPointerSizeLog2));
   __ Ldr(x3, MemOperand(x10, FixedArray::kHeaderSize - kHeapObjectTag));
 
   // Get the expected map from the stack or a smi in the
   // permanent slow case into register x10.
@@ skipping 1281 matching lines @@
       }
 
       // Push a copy of the function (found below the arguments) and
       // resolve eval.
       __ Peek(x10, (arg_count + 1) * kPointerSize);
       __ Push(x10);
       EmitResolvePossiblyDirectEval(arg_count);
 
       // The runtime call returns a pair of values in x0 (function) and
       // x1 (receiver). Touch up the stack with the right values.
-      // TODO(jbramley): Consider adding PokePair.
-      __ Stp(x1, x0, MemOperand(jssp, arg_count * kPointerSize));
+      __ PokePair(x1, x0, arg_count * kPointerSize);
     }
 
     // Record source position for debugger.
     SetSourcePosition(expr->position());
 
     // Call the evaluated function.
     CallFunctionStub stub(arg_count, RECEIVER_MIGHT_BE_IMPLICIT);
     __ Peek(x1, (arg_count + 1) * kXRegSizeInBytes);
     __ CallStub(&stub);
     RecordJSReturnSite(expr);
@@ skipping 2464 matching lines @@
   return previous_;
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_A64