CPU/Recompiler: Add EmitBindLabel and EmitBranchIfBitClear

src/core/cpu_recompiler_code_generator.h

@@ -80,6 +80,8 @@ public:
 
   // Branching, generates two paths.
   void EmitBranch(Condition condition, Reg lr_reg, Value&& branch_target);
+  void EmitBranchIfBitClear(HostReg reg, RegSize size, u8 bit, LabelType* label);
+  void EmitBindLabel(LabelType* label);
 
   // Raising exception if condition is true.
   void EmitRaiseException(Exception excode, Condition condition = Condition::Always);

src/core/cpu_recompiler_code_generator_aarch64.cpp

@@ -1541,6 +1541,27 @@ void CodeGenerator::EmitBranch(Condition condition, Reg lr_reg, Value&& branch_t
     m_register_cache.InvalidateGuestRegister(lr_reg);
 }
 
+void CodeGenerator::EmitBranchIfBitClear(HostReg reg, RegSize size, u8 bit, LabelType* label)
+{
+  switch (size)
+  {
+    case RegSize_8:
+    case RegSize_16:
+    case RegSize_32:
+      m_emit->tbz(GetHostReg32(reg), bit, label);
+      break;
+
+    default:
+      UnreachableCode();
+      break;
+  }
+}
+
+void CodeGenerator::EmitBindLabel(LabelType* label)
+{
+  m_emit->Bind(label);
+}
+
 void CodeGenerator::EmitRaiseException(Exception excode, Condition condition /* = Condition::Always */)
 {
   if (condition == Condition::Always)

src/core/cpu_recompiler_code_generator_x64.cpp

@@ -1937,6 +1937,36 @@ void CodeGenerator::EmitBranch(Condition condition, Reg lr_reg, Value&& branch_t
     m_register_cache.InvalidateGuestRegister(lr_reg);
 }
 
+void CodeGenerator::EmitBranchIfBitClear(HostReg reg, RegSize size, u8 bit, LabelType* label)
+{
+  switch (size)
+  {
+    case RegSize_8:
+      m_emit->bt(GetHostReg8(reg), bit);
+      m_emit->jnc(*label);
+      break;
+
+    case RegSize_16:
+      m_emit->bt(GetHostReg16(reg), bit);
+      m_emit->jnc(*label);
+      break;
+
+    case RegSize_32:
+      m_emit->bt(GetHostReg32(reg), bit);
+      m_emit->jnc(*label);
+      break;
+
+    default:
+      UnreachableCode();
+      break;
+  }
+}
+
+void CodeGenerator::EmitBindLabel(LabelType* label)
+{
+  m_emit->L(*label);
+}
+
 void CodeGenerator::EmitRaiseException(Exception excode, Condition condition /* = Condition::Always */)
 {
   if (condition == Condition::Always)

src/core/cpu_recompiler_types.h

@@ -52,6 +52,7 @@ enum class Condition : u8
 
 using HostReg = Xbyak::Operand::Code;
 using CodeEmitter = Xbyak::CodeGenerator;
+using LabelType = Xbyak::Label;
 enum : u32
 {
   HostReg_Count = 16
@@ -70,6 +71,7 @@ constexpr bool SHIFTS_ARE_IMPLICITLY_MASKED = true;
 
 using HostReg = unsigned;
 using CodeEmitter = vixl::aarch64::MacroAssembler;
+using LabelType = vixl::aarch64::Label;
 enum : u32
 {
     HostReg_Count = vixl::aarch64::kNumberOfRegisters