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112 lines
2.8 KiB
112 lines
2.8 KiB
#include "Stack.h"
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#include "Runtime.h"
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#include "Type.h"
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#include <csetjmp>
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#include <llvm/IR/Function.h>
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#include <llvm/IR/TypeBuilder.h>
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namespace dev
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{
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namespace eth
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{
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namespace jit
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{
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Stack::Stack(llvm::IRBuilder<>& _builder)
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: CompilerHelper(_builder)
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{
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m_arg = m_builder.CreateAlloca(Type::i256, nullptr, "stack.arg");
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using namespace llvm;
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using Linkage = GlobalValue::LinkageTypes;
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auto module = getModule();
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m_push = Function::Create(FunctionType::get(m_builder.getVoidTy(), Type::WordPtr, false), Linkage::ExternalLinkage, "stack_push", module);
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m_pop = Function::Create(FunctionType::get(m_builder.getVoidTy(), Type::Size, false), Linkage::ExternalLinkage, "stack_pop", module);
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llvm::Type* getSetArgTypes[] = {Type::Size, Type::WordPtr};
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m_get = Function::Create(FunctionType::get(m_builder.getVoidTy(), ArrayRef<llvm::Type*>(getSetArgTypes), false), Linkage::ExternalLinkage, "stack_get", module);
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m_set = Function::Create(FunctionType::get(m_builder.getVoidTy(), ArrayRef<llvm::Type*>(getSetArgTypes), false), Linkage::ExternalLinkage, "stack_set", module);
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}
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Stack::~Stack()
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{}
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llvm::Value* Stack::get(size_t _index)
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{
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m_builder.CreateCall2(m_get, llvm::ConstantInt::get(Type::Size, _index, false), m_arg);
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return m_builder.CreateLoad(m_arg);
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}
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void Stack::set(size_t _index, llvm::Value* _value)
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{
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m_builder.CreateStore(_value, m_arg);
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m_builder.CreateCall2(m_set, llvm::ConstantInt::get(Type::Size, _index, false), m_arg);
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}
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void Stack::pop(size_t _count)
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{
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m_builder.CreateCall(m_pop, llvm::ConstantInt::get(Type::Size, _count, false));
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}
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void Stack::push(llvm::Value* _value)
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{
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m_builder.CreateStore(_value, m_arg);
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m_builder.CreateCall(m_push, m_arg);
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}
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size_t Stack::maxStackSize = 0;
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}
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}
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}
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extern "C"
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{
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using namespace dev::eth::jit;
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extern std::jmp_buf* rt_jmpBuf;
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EXPORT void stack_pop(uint64_t _count)
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{
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auto& stack = Runtime::getStack();
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if (stack.size() < _count)
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longjmp(*rt_jmpBuf, static_cast<uint64_t>(ReturnCode::StackTooSmall));
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stack.erase(stack.end() - _count, stack.end());
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}
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EXPORT void stack_push(i256* _word)
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{
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auto& stack = Runtime::getStack();
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stack.push_back(*_word);
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if (stack.size() > Stack::maxStackSize)
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Stack::maxStackSize = stack.size();
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}
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EXPORT void stack_get(uint64_t _index, i256* _ret)
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{
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auto& stack = Runtime::getStack();
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// TODO: encode _index and stack size in the return code
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if (stack.size() <= _index)
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longjmp(*rt_jmpBuf, static_cast<uint64_t>(ReturnCode::StackTooSmall));
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*_ret = *(stack.rbegin() + _index);
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}
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EXPORT void stack_set(uint64_t _index, i256* _word)
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{
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auto& stack = Runtime::getStack();
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// TODO: encode _index and stack size in the return code
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if (stack.size() <= _index)
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longjmp(*rt_jmpBuf, static_cast<uint64_t>(ReturnCode::StackTooSmall));
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*(stack.rbegin() + _index) = *_word;
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}
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} // extern "C"
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