#ifndef JumpTable_h
#define JumpTable_h
#include "MacroAssembler.h"
#include <wtf/HashMap.h>
#include <wtf/Vector.h>
#include <wtf/text/StringImpl.h>
namespace JSC {
struct OffsetLocation {
int32_t branchOffset;
#if ENABLE(JIT)
CodeLocationLabel ctiOffset;
#endif
};
struct StringJumpTable {
typedef HashMap<RefPtr<StringImpl>, OffsetLocation> StringOffsetTable;
StringOffsetTable offsetTable;
#if ENABLE(JIT)
CodeLocationLabel ctiDefault; #endif
inline int32_t offsetForValue(StringImpl* value, int32_t defaultOffset)
{
StringOffsetTable::const_iterator end = offsetTable.end();
StringOffsetTable::const_iterator loc = offsetTable.find(value);
if (loc == end)
return defaultOffset;
return loc->value.branchOffset;
}
#if ENABLE(JIT)
inline CodeLocationLabel ctiForValue(StringImpl* value)
{
StringOffsetTable::const_iterator end = offsetTable.end();
StringOffsetTable::const_iterator loc = offsetTable.find(value);
if (loc == end)
return ctiDefault;
return loc->value.ctiOffset;
}
#endif
void clear()
{
offsetTable.clear();
}
};
struct SimpleJumpTable {
Vector<int32_t> branchOffsets;
int32_t min;
#if ENABLE(JIT)
Vector<CodeLocationLabel> ctiOffsets;
CodeLocationLabel ctiDefault;
#endif
int32_t offsetForValue(int32_t value, int32_t defaultOffset);
void add(int32_t key, int32_t offset)
{
if (!branchOffsets[key])
branchOffsets[key] = offset;
}
#if ENABLE(JIT)
void ensureCTITable()
{
ASSERT(ctiOffsets.isEmpty() || ctiOffsets.size() == branchOffsets.size());
ctiOffsets.grow(branchOffsets.size());
}
inline CodeLocationLabel ctiForValue(int32_t value)
{
if (value >= min && static_cast<uint32_t>(value - min) < ctiOffsets.size())
return ctiOffsets[value - min];
return ctiDefault;
}
#endif
void clear()
{
branchOffsets.clear();
#if ENABLE(JIT)
ctiOffsets.clear();
#endif
}
};
}
#endif // JumpTable_h