X87: [Interpreter] Add support for parameter variables.

port 5d975694e4d3ecf66716cc5395d4d10c9730f9dd (r30403)

original commit message:

    Adds support for parameters to the BytecodeArrayBuilder and BytecodeGenerator.
    Parameters are accessed as negative interpreter registers.

R=weiliang.lin@intel.com
BUG=

Review URL: https://codereview.chromium.org/1324453003

Cr-Commit-Position: refs/heads/master@{#30440}

diff --git a/src/x87/builtins-x87.cc b/src/x87/builtins-x87.cc
index a8aa7e1..cd7568c 100644 (file)
--- a/src/x87/builtins-x87.cc
+++ b/src/x87/builtins-x87.cc
@@ -752,9 +752,14 @@ void Builtins::Generate_InterpreterExitTrampoline(MacroAssembler* masm) {
 
   // Leave the frame (also dropping the register file).
   __ leave();
-  // Return droping receiver + arguments.
-  // TODO(rmcilroy): Get number of arguments from BytecodeArray.
-  __ Ret(1 * kPointerSize, ecx);
+
+  // Drop receiver + arguments and return.
+  __ mov(ebx, FieldOperand(kInterpreterBytecodeArrayRegister,
+                           BytecodeArray::kParameterSizeOffset));
+  __ pop(ecx);
+  __ add(esp, ebx);
+  __ push(ecx);
+  __ ret(0);
 }