Implement inline string compare on ARM.

src/ia32/assembler-ia32.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // 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.
 //
@@ skipping 842 matching lines @@
 
 void Assembler::cmpb(const Operand& op, int8_t imm8) {
   EnsureSpace ensure_space(this);
   last_pc_ = pc_;
   EMIT(0x80);
   emit_operand(edi, op);  // edi == 7
   EMIT(imm8);
 }
 
 
+void Assembler::cmpb(const Operand& dst, Register src) {
+  ASSERT(src.is_byte_register());
+  EnsureSpace ensure_space(this);
+  last_pc_ = pc_;
+  EMIT(0x38);
+  emit_operand(src, dst);
+}
+
+
+void Assembler::cmpb(Register dst, const Operand& src) {
+  ASSERT(dst.is_byte_register());
+  EnsureSpace ensure_space(this);
+  last_pc_ = pc_;
+  EMIT(0x3A);
+  emit_operand(dst, src);
+}
+
+
 void Assembler::cmpw(const Operand& op, Immediate imm16) {
   ASSERT(imm16.is_int16());
   EnsureSpace ensure_space(this);
   last_pc_ = pc_;
   EMIT(0x66);
   EMIT(0x81);
   emit_operand(edi, op);
   emit_w(imm16);
 }
 
@@ skipping 1501 matching lines @@
   push_insn[1] = 13;    // Skip over coverage insns.
   if (coverage_log != NULL) {
     fprintf(coverage_log, "%s\n", file_line);
     fflush(coverage_log);
   }
 }
 
 #endif
 
 } }  // namespace v8::internal