MacroAssemblerHelpers.h [plain text]
#pragma once
namespace JSC {
namespace MacroAssemblerHelpers {
template<typename MacroAssemblerType>
inline bool isSigned(typename MacroAssemblerType::RelationalCondition cond)
{
switch (cond) {
case MacroAssemblerType::Equal:
case MacroAssemblerType::NotEqual:
case MacroAssemblerType::GreaterThan:
case MacroAssemblerType::GreaterThanOrEqual:
case MacroAssemblerType::LessThan:
case MacroAssemblerType::LessThanOrEqual:
return true;
default:
return false;
}
}
template<typename MacroAssemblerType>
inline bool isUnsigned(typename MacroAssemblerType::RelationalCondition cond)
{
switch (cond) {
case MacroAssemblerType::Equal:
case MacroAssemblerType::NotEqual:
case MacroAssemblerType::Above:
case MacroAssemblerType::AboveOrEqual:
case MacroAssemblerType::Below:
case MacroAssemblerType::BelowOrEqual:
return true;
default:
return false;
}
}
template<typename MacroAssemblerType>
inline bool isSigned(typename MacroAssemblerType::ResultCondition cond)
{
switch (cond) {
case MacroAssemblerType::Signed:
case MacroAssemblerType::PositiveOrZero:
case MacroAssemblerType::Zero:
case MacroAssemblerType::NonZero:
return true;
default:
return false;
}
}
template<typename MacroAssemblerType>
inline bool isUnsigned(typename MacroAssemblerType::ResultCondition cond)
{
switch (cond) {
case MacroAssemblerType::Zero:
case MacroAssemblerType::NonZero:
return true;
default:
return false;
}
}
template<typename MacroAssemblerType>
inline typename MacroAssemblerType::TrustedImm32 mask8OnCondition(MacroAssemblerType&, typename MacroAssemblerType::RelationalCondition cond, typename MacroAssemblerType::TrustedImm32 value)
{
if (isUnsigned<MacroAssemblerType>(cond))
return typename MacroAssemblerType::TrustedImm32(static_cast<uint8_t>(value.m_value));
return typename MacroAssemblerType::TrustedImm32(static_cast<int8_t>(value.m_value));
}
template<typename MacroAssemblerType>
inline typename MacroAssemblerType::TrustedImm32 mask8OnCondition(MacroAssemblerType&, typename MacroAssemblerType::ResultCondition cond, typename MacroAssemblerType::TrustedImm32 value)
{
if (isUnsigned<MacroAssemblerType>(cond))
return typename MacroAssemblerType::TrustedImm32(static_cast<uint8_t>(value.m_value));
ASSERT_WITH_MESSAGE(cond != MacroAssemblerType::Overflow, "Overflow is not used for 8bit test operations.");
ASSERT(isSigned<MacroAssemblerType>(cond));
return typename MacroAssemblerType::TrustedImm32(static_cast<int8_t>(value.m_value));
}
template<typename MacroAssemblerType, typename Condition, typename ...Args>
void load8OnCondition(MacroAssemblerType& jit, Condition cond, Args... args)
{
if (isUnsigned<MacroAssemblerType>(cond))
return jit.load8(std::forward<Args>(args)...);
return jit.load8SignedExtendTo32(std::forward<Args>(args)...);
}
} }