Introduce leap, movzxbp, movzxwp, repmovsp and xchgp for x64 port

src/x64/debug-x64.cc

Index: src/x64/debug-x64.cc
diff --git a/src/x64/debug-x64.cc b/src/x64/debug-x64.cc
index dcf2341533d437a30d18dd33de5605992c89ac06..36d5df678e86007d3ed9629b726eead256ed91a1 100644
--- a/src/x64/debug-x64.cc
+++ b/src/x64/debug-x64.cc
@@ -156,7 +156,7 @@ static void Generate_DebugBreakCallHelper(MacroAssembler* masm,
     // Read current padding counter and skip corresponding number of words.
     __ Pop(kScratchRegister);
     __ SmiToInteger32(kScratchRegister, kScratchRegister);
-    __ lea(rsp, Operand(rsp, kScratchRegister, times_pointer_size, 0));
+    __ leap(rsp, Operand(rsp, kScratchRegister, times_pointer_size, 0));
 
     // Get rid of the internal frame.
   }
@@ -327,7 +327,7 @@ void Debug::GenerateFrameDropperLiveEdit(MacroAssembler* masm) {
   __ movp(Operand(rax, 0), Immediate(0));
 
   // We do not know our frame height, but set rsp based on rbp.
-  __ lea(rsp, Operand(rbp, -1 * kPointerSize));
+  __ leap(rsp, Operand(rbp, -1 * kPointerSize));
 
   __ Pop(rdi);  // Function.
   __ popq(rbp);
@@ -338,7 +338,7 @@ void Debug::GenerateFrameDropperLiveEdit(MacroAssembler* masm) {
   // Get function code.
   __ movp(rdx, FieldOperand(rdi, JSFunction::kSharedFunctionInfoOffset));
   __ movp(rdx, FieldOperand(rdx, SharedFunctionInfo::kCodeOffset));
-  __ lea(rdx, FieldOperand(rdx, Code::kHeaderSize));
+  __ leap(rdx, FieldOperand(rdx, Code::kHeaderSize));
 
   // Re-run JSFunction, rdi is function, rsi is context.
   __ jmp(rdx);