special_register_id.h

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#pragma once
 
#include "libmicroemu/types.h"
 
namespace libmicroemu {

enum class SpecialRegisterId : u8 {
 
  //---------------------
  // Persistent registers
  // These registers are part of the processor and have a state that persists.
  //---------------------
 
  kSysCtrl = 0U, 
  kApsr,         
  kIstate,       
  kIpsr,         
  kVtor,         
  kCcr,          
  kCfsr,         
  kBfar,         
  kSpMain,       
  kSpProcess,    
  kSysTickCsr,   
  kSysTickRvr,   
  kSysTickCvr,   
  kSysTickCalib, 
 
  //---------------------
  // Runtime registers
  // These registers are not persitent, but are built during runtime.
  //---------------------
  kEpsr,    
  kXpsr,    
  kControl, 
};
 
constexpr auto kLastPersistentSpecialRegister = SpecialRegisterId::kSysTickCalib;
constexpr auto kFirstRuntimeSpecialRegister = SpecialRegisterId::kEpsr;
constexpr auto kLastRuntimeSpecialRegister = SpecialRegisterId::kControl;
constexpr auto kLastSpecialRegister = kLastRuntimeSpecialRegister;

static constexpr u32 CountPersistentSpecialRegisters() noexcept {
  return static_cast<u32>(kLastPersistentSpecialRegister) + 1U;
};

static constexpr u32 CountSpecialRegisters() noexcept {
  return static_cast<u32>(kLastSpecialRegister) + 1U;
};
 
} // namespace libmicroemu