RegExp bitmap test for word character.

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 1862 matching lines @@
   ASSERT(is_int8(mask.value_) || is_uint8(mask.value_));
   EnsureSpace ensure_space(this);
   last_pc_ = pc_;
   emit_optional_rex_32(rax, op);
   emit(0xF6);
   emit_operand(rax, op);  // Operation code 0
   emit(mask.value_);  // Low byte emitted.
 }
 
 
+void Assembler::testb(const Operand& op, Register reg) {
+  EnsureSpace ensure_space(this);
+  last_pc_ = pc_;
+  if (reg.code() > 3) {
+    // Register is not one of al, bl, cl, dl.  Its encoding needs REX.
+    emit_rex_32(reg, op);
+  } else {
+    emit_optional_rex_32(reg, op);
+  }
+  emit(0x84);
+  emit_operand(reg, op);
+}
+
+
 void Assembler::testl(Register dst, Register src) {
   EnsureSpace ensure_space(this);
   last_pc_ = pc_;
   emit_optional_rex_32(dst, src);
   emit(0x85);
   emit_modrm(dst, src);
 }
 
 
 void Assembler::testl(Register reg, Immediate mask) {
@@ skipping 637 matching lines @@
     written_position_ = current_position_;
   }
 }
 
 
 const int RelocInfo::kApplyMask = RelocInfo::kCodeTargetMask |
                                   1 << RelocInfo::INTERNAL_REFERENCE |
                                   1 << RelocInfo::JS_RETURN;
 
 } }  // namespace v8::internal