Extends testb and cmpb/cmpw instruction support in the ia32 assembler.

src/ia32/assembler-ia32-inl.h

 // 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 433 matching lines @@
 void Assembler::emit_code_relative_offset(Label* label) {
   if (label->is_bound()) {
     int32_t pos;
     pos = label->pos() + Code::kHeaderSize - kHeapObjectTag;
     emit(pos);
   } else {
     emit_disp(label, Displacement::CODE_RELATIVE);
   }
 }
 
+void Assembler::emit_b(Immediate x) {
+  DCHECK(x.is_int8() || x.is_uint8());
+  uint8_t value = static_cast<uint8_t>(x.x_);
+  *pc_++ = value;
+}
 
 void Assembler::emit_w(const Immediate& x) {
   DCHECK(RelocInfo::IsNone(x.rmode_));
   uint16_t value = static_cast<uint16_t>(x.x_);
   reinterpret_cast<uint16_t*>(pc_)[0] = value;
   pc_ += sizeof(uint16_t);
 }
 
 
 Address Assembler::target_address_at(Address pc, Address constant_pool) {
@@ skipping 104 matching lines @@
 
 Operand::Operand(Immediate imm) {
   // [disp/r]
   set_modrm(0, ebp);
   set_dispr(imm.x_, imm.rmode_);
 }
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_IA32_ASSEMBLER_IA32_INL_H_