--- a/src/cpu/ppc/vm/macroAssembler_ppc.cpp	Thu Mar 06 10:55:28 2014 -0800
+++ b/src/cpu/ppc/vm/macroAssembler_ppc.cpp	Mon Mar 10 12:58:02 2014 +0100
@@ -2412,7 +2412,8 @@
 #ifdef CC_INTERP
   ld(tmp1/*pc*/, _top_ijava_frame_abi(frame_manager_lr), sp);
 #else
-  Unimplemented();
+  address entry = pc();
+  load_const_optimized(tmp1, entry);
 #endif
 
   set_last_Java_frame(/*sp=*/sp, /*pc=*/tmp1);
@@ -2472,6 +2473,16 @@
   }
 }
 
+void MacroAssembler::store_klass_gap(Register dst_oop, Register val) {
+  if (UseCompressedClassPointers) {
+    if (val == noreg) {
+      val = R0;
+      li(val, 0);
+    }
+    stw(val, oopDesc::klass_gap_offset_in_bytes(), dst_oop); // klass gap if compressed
+  }
+}
+
 int MacroAssembler::instr_size_for_decode_klass_not_null() {
   if (!UseCompressedClassPointers) return 0;
   int num_instrs = 1;  // shift or move
@@ -3143,3 +3154,15 @@
 }
 
 #endif // !PRODUCT
+
+SkipIfEqualZero::SkipIfEqualZero(MacroAssembler* masm, Register temp, const bool* flag_addr) : _masm(masm), _label() {
+  int simm16_offset = masm->load_const_optimized(temp, (address)flag_addr, R0, true);
+  assert(sizeof(bool) == 1, "PowerPC ABI");
+  masm->lbz(temp, simm16_offset, temp);
+  masm->cmpwi(CCR0, temp, 0);
+  masm->beq(CCR0, _label);
+}
+
+SkipIfEqualZero::~SkipIfEqualZero() {
+  _masm->bind(_label);
+}