RegisterAtOffsetList.cpp [plain text]
#include "config.h"
#include "RegisterAtOffsetList.h"
#if ENABLE(ASSEMBLER)
#include <wtf/ListDump.h>
namespace JSC {
DEFINE_ALLOCATOR_WITH_HEAP_IDENTIFIER(RegisterAtOffsetList);
RegisterAtOffsetList::RegisterAtOffsetList() { }
RegisterAtOffsetList::RegisterAtOffsetList(RegisterSet registerSet, OffsetBaseType offsetBaseType)
{
size_t numberOfRegisters = registerSet.numberOfSetRegisters();
ptrdiff_t offset = 0;
if (offsetBaseType == FramePointerBased)
offset = -(static_cast<ptrdiff_t>(numberOfRegisters) * sizeof(CPURegister));
m_registers.reserveInitialCapacity(numberOfRegisters);
registerSet.forEach([&] (Reg reg) {
m_registers.append(RegisterAtOffset(reg, offset));
offset += sizeof(CPURegister);
});
}
void RegisterAtOffsetList::dump(PrintStream& out) const
{
out.print(listDump(m_registers));
}
RegisterAtOffset* RegisterAtOffsetList::find(Reg reg) const
{
return tryBinarySearch<RegisterAtOffset, Reg>(m_registers, m_registers.size(), reg, RegisterAtOffset::getReg);
}
unsigned RegisterAtOffsetList::indexOf(Reg reg) const
{
if (RegisterAtOffset* pointer = find(reg))
return pointer - m_registers.begin();
return UINT_MAX;
}
const RegisterAtOffsetList& RegisterAtOffsetList::llintBaselineCalleeSaveRegisters()
{
static std::once_flag onceKey;
static LazyNeverDestroyed<RegisterAtOffsetList> result;
std::call_once(onceKey, [] {
result.construct(RegisterSet::llintBaselineCalleeSaveRegisters());
});
return result.get();
}
}
#endif // ENABLE(ASSEMBLER)