Assembler changes for enabling GrowHeap in Wasm

src/x64/macro-assembler-x64.cc

Index: src/x64/macro-assembler-x64.cc
diff --git a/src/x64/macro-assembler-x64.cc b/src/x64/macro-assembler-x64.cc
index e72d40b4aec743f4db9f5a27a81d25c2d5657010..a1d83bd02e961e208627e341eec53d105ced4c2c 100644
--- a/src/x64/macro-assembler-x64.cc
+++ b/src/x64/macro-assembler-x64.cc
@@ -1114,6 +1114,17 @@ void MacroAssembler::Set(Register dst, int64_t x) {
   }
 }
 
+void MacroAssembler::Set(Register dst, int64_t x, RelocInfo::Mode rmode) {
+  if (x == 0) {
+    xorl(dst, dst);

[Yang, 2016/03/03 06:21:56]

so if x == 0, we ignore the relocation mode?

[titzer, 2016/03/03 18:11:59]

I think we shouldn't do any smartness here, since the relocation mode indicates
we might patch the value to be an arbitrary value later.

+  } else if (is_uint32(x)) {
+    movl(dst, Immediate(static_cast<uint32_t>(x), rmode));
+  } else if (is_int32(x)) {
+    movq(dst, Immediate(static_cast<int32_t>(x), rmode));
+  } else {
+    movq(dst, x, rmode);
+  }
+}
 
 void MacroAssembler::Set(const Operand& dst, intptr_t x) {
   if (kPointerSize == kInt64Size) {