X87: [Interpreter] Pass context to interpreter bytecode handlers and add LoadConstextSlot

src/x87/builtins-x87.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_X87
 
 #include "src/code-factory.h"
 #include "src/codegen.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 707 matching lines @@
       Immediate(kPointerSize + StandardFrameConstants::kFixedFrameSizeFromFp));
   __ mov(kInterpreterBytecodeOffsetRegister,
          Immediate(BytecodeArray::kHeaderSize - kHeapObjectTag));
   // Since the dispatch table root might be set after builtins are generated,
   // load directly from the roots table.
   __ LoadRoot(kInterpreterDispatchTableRegister,
               Heap::kInterpreterTableRootIndex);
   __ add(kInterpreterDispatchTableRegister,
          Immediate(FixedArray::kHeaderSize - kHeapObjectTag));
 
-  // TODO(rmcilroy) Push our context as a stack located parameter of the
-  // bytecode handler.
+  // Push context as a stack located parameter to the bytecode handler.
+  DCHECK_EQ(-1, kInterpreterContextSpillSlot);
+  __ push(esi);
 
   // Dispatch to the first bytecode handler for the function.
   __ movzx_b(esi, Operand(kInterpreterBytecodeArrayRegister,
                           kInterpreterBytecodeOffsetRegister, times_1, 0));
   __ mov(esi, Operand(kInterpreterDispatchTableRegister, esi,
                       times_pointer_size, 0));
   // TODO(rmcilroy): Make dispatch table point to code entrys to avoid untagging
   // and header removal.
   __ add(esi, Immediate(Code::kHeaderSize - kHeapObjectTag));
   __ call(esi);
@@ skipping 1041 matching lines @@
 
   __ bind(&ok);
   __ ret(0);
 }
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X87