X64 implementation: comparison operations.

src/x64/assembler-x64.cc

 // Copyright 2009 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 486 matching lines @@
     emit(src.value_);
   } else {
     emit(0x81);
     emit_operand(subcode, dst);
     emitl(src.value_);
   }
 }
 
 
 void Assembler::immediate_arithmetic_op_8(byte subcode,
-                                           const Operand& dst,
-                                           Immediate src) {
+                                          const Operand& dst,
+                                          Immediate src) {
   EnsureSpace ensure_space(this);
   last_pc_ = pc_;
   emit_optional_rex_32(dst);
-  ASSERT(is_int8(src.value_));
+  ASSERT(is_int8(src.value_) || is_uint8(src.value_));
   emit(0x80);
   emit_operand(subcode, dst);
   emit(src.value_);
 }
 
 
+void Assembler::immediate_arithmetic_op_8(byte subcode,
+                                          Register dst,
+                                          Immediate src) {
+  EnsureSpace ensure_space(this);
+  last_pc_ = pc_;
+  if (dst.code() > 3) {
+    // Use 64-bit mode byte registers.
+    emit_rex_64(dst);
+  }
+  ASSERT(is_int8(src.value_) || is_uint8(src.value_));
+  emit(0x80);
+  emit_modrm(subcode, dst);
+  emit(src.value_);
+}
+
+
 void Assembler::shift(Register dst, Immediate shift_amount, int subcode) {
   EnsureSpace ensure_space(this);
   last_pc_ = pc_;
   ASSERT(is_uint6(shift_amount.value_));  // illegal shift count
   if (shift_amount.value_ == 1) {
     emit_rex_64(dst);
     emit(0xD1);
     emit_modrm(subcode, dst);
   } else {
     emit_rex_64(dst);
@@ skipping 1560 matching lines @@
 bool BreakLocationIterator::IsDebugBreakAtReturn()  {
   UNIMPLEMENTED();
   return false;
 }
 
 void BreakLocationIterator::SetDebugBreakAtReturn()  {
   UNIMPLEMENTED();
 }
 
 } }  // namespace v8::internal