PPC: [Interpreter] Add support for JS calls.

Port e7fb2339

Original commit message:
    Adds support for JS calls to the interpreter. In order to support
    calls from the interpreter, the PushArgsAndCall builtin is added
    which pushes a sequence of arguments onto the stack and calls
    builtin::Call.

    Adds the Call bytecode.

R=rmcilroy@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, dstence@us.ibm.com
BUG=v8:4280
LOG=N

Review URL: https://codereview.chromium.org/1345543002

Cr-Commit-Position: refs/heads/master@{#30721}

src/ppc/builtins-ppc.cc

@@ -1673,6 +1673,32 @@ void Builtins::Generate_Call(MacroAssembler* masm) {
 }
 
 
+// static
+void Builtins::Generate_PushArgsAndCall(MacroAssembler* masm) {
+  // ----------- S t a t e -------------
+  //  -- r3 : the number of arguments (not including the receiver)
+  //  -- r5 : the address of the first argument to be pushed. Subsequent
+  //          arguments should be consecutive above this, in the same order as
+  //          they are to be pushed onto the stack.
+  //  -- r4 : the target to call (can be any Object).
+
+  // Calculate number of arguments (add one for receiver).
+  __ addi(r6, r3, Operand(1));
+
+  // Push the arguments.
+  Label loop;
+  __ addi(r5, r5, Operand(kPointerSize));  // Bias up for LoadPU
+  __ mtctr(r6);
+  __ bind(&loop);
+  __ LoadPU(r6, MemOperand(r5, -kPointerSize));
+  __ push(r6);
+  __ bdnz(&loop);
+
+  // Call the target.
+  __ Jump(masm->isolate()->builtins()->Call(), RelocInfo::CODE_TARGET);
+}
+
+
 void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- r3 : actual number of arguments

src/ppc/interface-descriptors-ppc.cc

@@ -380,6 +380,17 @@ void MathRoundVariantCallFromOptimizedCodeDescriptor::
   };
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
+
+
+void PushArgsAndCallDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  Register registers[] = {
+      r3,  // argument count (including receiver)
+      r5,  // address of first argument
+      r4   // the target callable to be call
+  };
+  data->InitializePlatformSpecific(arraysize(registers), registers);
+}
 }  // namespace internal
 }  // namespace v8