Introduce addp, idivp, imulp and subp for x64 port

test/cctest/test-disasm-x64.cc

Index: test/cctest/test-disasm-x64.cc
diff --git a/test/cctest/test-disasm-x64.cc b/test/cctest/test-disasm-x64.cc
index ca843c64a579dd2fd34560226ff2bbcf7ad0d87e..0e708ab3ad063de099fd29a27db300ac6cc24e7d 100644
--- a/test/cctest/test-disasm-x64.cc
+++ b/test/cctest/test-disasm-x64.cc
@@ -112,7 +112,7 @@ TEST(DisasmX64) {
   __ movzxwq(rdx, Operand(rcx, 0));
 
   __ nop();
-  __ imul(rdx, rcx);
+  __ imulq(rdx, rcx);
   __ shld(rdx, rcx);
   __ shrd(rdx, rcx);
   __ bts(Operand(rdx, 0), rcx);
@@ -162,9 +162,9 @@ TEST(DisasmX64) {
   __ not_(rdx);
   __ testq(Operand(rbx, rcx, times_4, 10000), rdx);
 
-  __ imul(rdx, Operand(rbx, rcx, times_4, 10000));
-  __ imul(rdx, rcx, Immediate(12));
-  __ imul(rdx, rcx, Immediate(1000));
+  __ imulq(rdx, Operand(rbx, rcx, times_4, 10000));
+  __ imulq(rdx, rcx, Immediate(12));
+  __ imulq(rdx, rcx, Immediate(1000));
 
   __ incq(rdx);
   __ incq(Operand(rbx, rcx, times_4, 10000));
@@ -216,8 +216,8 @@ TEST(DisasmX64) {
 
   __ xor_(rbx, Immediate(12345));
 
-  __ imul(rdx, rcx, Immediate(12));
-  __ imul(rdx, rcx, Immediate(1000));
+  __ imulq(rdx, rcx, Immediate(12));
+  __ imulq(rdx, rcx, Immediate(1000));
 
   __ cld();