Optionally use 31-bits SMI value for 64-bit system

src/x64/assembler-x64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3011 matching lines @@
 
 void Assembler::movmskps(Register dst, XMMRegister src) {
   EnsureSpace ensure_space(this);
   emit_optional_rex_32(dst, src);
   emit(0x0f);
   emit(0x50);
   emit_sse_operand(dst, src);
 }
 
 
+void Assembler::pcmpeqd(XMMRegister dst, XMMRegister src) {
+  EnsureSpace ensure_space(this);
+  emit(0x66);
+  emit(0x0f);
+  emit(0x76);
+  emit_sse_operand(dst, src);
+}
+
+
 void Assembler::emit_sse_operand(XMMRegister reg, const Operand& adr) {
   Register ireg = { reg.code() };
   emit_operand(ireg, adr);
 }
 
 
 void Assembler::emit_sse_operand(XMMRegister dst, XMMRegister src) {
   emit(0xC0 | (dst.low_bits() << 3) | src.low_bits());
 }
 
@@ skipping 71 matching lines @@
 bool RelocInfo::IsCodedSpecially() {
   // The deserializer needs to know whether a pointer is specially coded.  Being
   // specially coded on x64 means that it is a relative 32 bit address, as used
   // by branch instructions.
   return (1 << rmode_) & kApplyMask;
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64