Contribution of PowerPC port (continuation of 422063005) - PPC dir update 2 - mark2

src/ppc/builtins-ppc.cc

 // Copyright 2014 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.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_PPC
 
 #include "src/codegen.h"
 #include "src/debug.h"
@@ skipping 742 matching lines @@
 
   {
     FrameAndConstantPoolScope scope(masm, StackFrame::CONSTRUCT);
 
     // Smi-tagged arguments count.
     __ mr(r7, r3);
     __ SmiTag(r7, SetRC);
 
     // receiver is the hole.
     __ LoadRoot(ip, Heap::kTheHoleValueRootIndex);
-    __ Push(r7, ip);
+
+    // smi arguments count, new.target, receiver
+    __ Push(r7, r6, ip);
 
     // Set up pointer to last argument.
     __ addi(r5, fp, Operand(StandardFrameConstants::kCallerSPOffset));
 
     // Copy arguments and receiver to the expression stack.
     // r3: number of arguments
     // r4: constructor function
     // r5: address of last argument (caller sp)
     // r7: number of arguments (smi-tagged)
     // cr0: compare against zero of arguments
     // sp[0]: receiver
-    // sp[1]: number of arguments (smi-tagged)
+    // sp[1]: new.target
+    // sp[2]: number of arguments (smi-tagged)
     Label loop, no_args;
     __ beq(&no_args, cr0);
     __ ShiftLeftImm(ip, r3, Operand(kPointerSizeLog2));
     __ mtctr(r3);
     __ bind(&loop);
     __ subi(ip, ip, Operand(kPointerSize));
     __ LoadPX(r0, MemOperand(r5, ip));
     __ push(r0);
     __ bdnz(&loop);
     __ bind(&no_args);
 
+    __ addi(r3, r3, Operand(1));
+
+    // Handle step in.
+    Label skip_step_in;
+    ExternalReference debug_step_in_fp =
+        ExternalReference::debug_step_in_fp_address(masm->isolate());
+    __ mov(r5, Operand(debug_step_in_fp));
+    __ LoadP(r5, MemOperand(r5));
+    __ and_(r0, r5, r5, SetRC);
+    __ beq(&skip_step_in, cr0);
+
+    __ Push(r3, r4, r4);
+    __ CallRuntime(Runtime::kHandleStepInForDerivedConstructors, 1);
+    __ Pop(r3, r4);
+
+    __ bind(&skip_step_in);
+
     // Call the function.
     // r3: number of arguments
     // r4: constructor function
     ParameterCount actual(r3);
     __ InvokeFunction(r4, actual, CALL_FUNCTION, NullCallWrapper());
 
     // Restore context from the frame.
     // r3: result
     // sp[0]: number of arguments (smi-tagged)
     __ LoadP(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
@@ skipping 892 matching lines @@
     __ bkpt(0);
   }
 }
 
 
 #undef __
 }
 }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_PPC