#ifndef Reg_h
#define Reg_h
#if ENABLE(JIT)
#include "MacroAssembler.h"
namespace JSC {
class Reg {
public:
Reg()
: m_index(invalid())
{
}
Reg(MacroAssembler::RegisterID reg)
: m_index(MacroAssembler::registerIndex(reg))
{
}
Reg(MacroAssembler::FPRegisterID reg)
: m_index(MacroAssembler::registerIndex(reg))
{
}
static Reg fromIndex(unsigned index)
{
Reg result;
result.m_index = index;
return result;
}
static Reg first()
{
Reg result;
result.m_index = 0;
return result;
}
static Reg last()
{
Reg result;
result.m_index = MacroAssembler::numberOfRegisters() + MacroAssembler::numberOfFPRegisters() - 1;
return result;
}
Reg next() const
{
ASSERT(!!*this);
if (*this == last())
return Reg();
Reg result;
result.m_index = m_index + 1;
return result;
}
unsigned index() const { return m_index; }
bool isSet() const { return m_index != invalid(); }
bool operator!() const { return !isSet(); }
bool isGPR() const
{
return m_index < MacroAssembler::numberOfRegisters();
}
bool isFPR() const
{
return (m_index - MacroAssembler::numberOfRegisters()) < MacroAssembler::numberOfFPRegisters();
}
MacroAssembler::RegisterID gpr() const
{
ASSERT(isGPR());
return static_cast<MacroAssembler::RegisterID>(MacroAssembler::firstRegister() + m_index);
}
MacroAssembler::FPRegisterID fpr() const
{
ASSERT(isFPR());
return static_cast<MacroAssembler::FPRegisterID>(
MacroAssembler::firstFPRegister() + (m_index - MacroAssembler::numberOfRegisters()));
}
bool operator==(const Reg& other) const
{
return m_index == other.m_index;
}
bool operator!=(const Reg& other) const
{
return m_index != other.m_index;
}
bool operator<(const Reg& other) const
{
return m_index < other.m_index;
}
bool operator>(const Reg& other) const
{
return m_index > other.m_index;
}
bool operator<=(const Reg& other) const
{
return m_index <= other.m_index;
}
bool operator>=(const Reg& other) const
{
return m_index >= other.m_index;
}
unsigned hash() const
{
return m_index;
}
void dump(PrintStream&) const;
private:
static uint8_t invalid() { return 0xff; }
uint8_t m_index;
};
}
#endif // ENABLE(JIT)
#endif // Reg_h