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143 lines (132 loc) · 6.21 KB
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#include "vm.h"
VM::VM(){
func_table[OP_RET ] = &VM::funcOpRet ;
func_table[OP_CALL ] = &VM::funcOpCall ;
func_table[OP_JMP ] = &VM::funcOpJmp ;
func_table[OP_JZ ] = &VM::funcOpJz ;
func_table[OP_EQ ] = &VM::funcOpEq ;
func_table[OP_GE ] = &VM::funcOpGe ;
func_table[OP_LE ] = &VM::funcOpLe ;
func_table[OP_GNE ] = &VM::funcOpGne ;
func_table[OP_LNE ] = &VM::funcOpLne ;
func_table[OP_PUSH ] = &VM::funcOpPush ;
func_table[OP_DROP ] = &VM::funcOpDrop ;
func_table[OP_POP ] = &VM::funcOpPop ;
func_table[OP_DUP ] = &VM::funcOpDup ;
func_table[OP_OVER ] = &VM::funcOpOver ;
func_table[OP_SWAP ] = &VM::funcOpSwap ;
func_table[OP_ADD ] = &VM::funcOpAdd ;
func_table[OP_SUB ] = &VM::funcOpSub ;
func_table[OP_MUL ] = &VM::funcOpMul ;
func_table[OP_DIV ] = &VM::funcOpDiv ;
func_table[OP_DOT ] = &VM::funcOpDot ;
func_table[OP_HALT ] = &VM::funcOpHalt ;
func_table[OP_NOP ] = &VM::funcOpNop ;
func_table[OP_LOAD ] = &VM::funcOpLoad ;
func_table[OP_STORE] = &VM::funcOpStore ;
}
void VM::exec(const int32_t *bin_data, const Blockchain &blockchain) {
refresh(bin_data, blockchain);
while(is_halt == false) {
#ifdef DEBUG
displayState();
#endif
(this->*func_table[mem[ip++]])();
}
}
int32_t VM::peep() const { return data_stack[psp]; }
void VM::refresh(const int32_t *latest_data, const Blockchain &blockchain){
ib = blockchain.chain.size();
ip = 0;
rsp = 0;
psp = 0;
is_halt = false;
pblockchain = &blockchain;
std::memcpy(mem, latest_data, sizeof mem);
std::memcpy(bin_data, latest_data, sizeof mem);
std::memset(return_stack, 0, sizeof return_stack);
std::memset(data_stack, 0, sizeof data_stack);
}
inline void VM::load() {
if (ib < pblockchain->chain.size())
std::memcpy(mem, pblockchain->chain[ib].data, sizeof mem);
else
std::memcpy(mem, bin_data, sizeof mem);
}
void VM::displayOp(const int32_t &idx) const{
switch(idx) {
case OP_RET : std::cout << "OP_RET " << std::endl; break;
case OP_CALL : std::cout << "OP_CALL " << std::endl; break;
case OP_JMP : std::cout << "OP_JMP " << std::endl; break;
case OP_JZ : std::cout << "OP_JZ " << std::endl; break;
case OP_EQ : std::cout << "OP_EQ " << std::endl; break;
case OP_GE : std::cout << "OP_GE " << std::endl; break;
case OP_LE : std::cout << "OP_LE " << std::endl; break;
case OP_GNE : std::cout << "OP_GNE " << std::endl; break;
case OP_LNE : std::cout << "OP_LNE " << std::endl; break;
case OP_PUSH : std::cout << "OP_PUSH " << std::endl; break;
case OP_POP : std::cout << "OP_POP " << std::endl; break;
case OP_DUP : std::cout << "OP_DUP " << std::endl; break;
case OP_OVER : std::cout << "OP_OVER " << std::endl; break;
case OP_SWAP : std::cout << "OP_SWAP " << std::endl; break;
case OP_DROP : std::cout << "OP_DROP " << std::endl; break;
case OP_ADD : std::cout << "OP_ADD " << std::endl; break;
case OP_SUB : std::cout << "OP_SUB " << std::endl; break;
case OP_MUL : std::cout << "OP_MUL " << std::endl; break;
case OP_DIV : std::cout << "OP_DIV " << std::endl; break;
case OP_NOP : std::cout << "OP_NOP " << std::endl; break;
case OP_DOT : std::cout << "OP_DOT " << std::endl; break;
case OP_HALT : std::cout << "OP_HALT " << std::endl; break;
case OP_LOAD : std::cout << "OP_LOAD " << std::endl; break;
case OP_STORE : std::cout << "OP_STORE" << std::endl; break;
default : std::cout << "UNKNOWN " << std::endl; break;
}
}
void VM::displayState() const {
std::cout << std::endl;
std::cout << "ib=" << std::setw(4) << std::right << ib << ", " ;
std::cout << "ip=" << std::setw(4) << std::right << ip << ", " ;
std::cout << "rsp=" << std::setw(4) << std::right << rsp << ", " ;
std::cout << "psp=" << std::setw(4) << std::right << psp << ", " ;
std::cout << "fnum=" << std::setw(4) << std::right << mem[ip] << ", " ;
displayOp(mem[ip]);
for(int32_t i = 0; i <= psp; i++) {
std::cout << data_stack[i] << " ";
}
std::cout << std::endl;
}
void VM::funcOpRet () {
if(rsp == 0) is_halt = true;
ip = return_stack[rsp--];
ib = return_stack[rsp--];
load();
}
void VM::funcOpCall() {
return_stack[++rsp] = ib;
return_stack[++rsp] = ip + 2;
ib = mem[ip++];
ip = mem[ip];
load();
}
void VM::funcOpJmp () { ip = mem[ip]; }
void VM::funcOpJz () { if(data_stack[psp] == 0) ip = mem[ip]; else ip++; psp--; }
void VM::funcOpEq () { data_stack[psp - 1] = data_stack[psp - 1] == data_stack[psp]; psp--; }
void VM::funcOpGe () { data_stack[psp - 1] = data_stack[psp - 1] <= data_stack[psp]; psp--; }
void VM::funcOpLe () { data_stack[psp - 1] = data_stack[psp - 1] >= data_stack[psp]; psp--; }
void VM::funcOpGne () { data_stack[psp - 1] = data_stack[psp - 1] < data_stack[psp]; psp--; }
void VM::funcOpLne () { data_stack[psp - 1] = data_stack[psp - 1] > data_stack[psp]; psp--; }
void VM::funcOpPush () { data_stack[++psp] = mem[ip++]; }
void VM::funcOpDrop () { psp--; }
void VM::funcOpPop () { psp--; }
void VM::funcOpDup () { data_stack[psp + 1] = data_stack[psp]; psp++; }
void VM::funcOpOver () { data_stack[psp + 1] = data_stack[psp - 1]; psp++; }
void VM::funcOpSwap () { int32_t tmp = data_stack[psp]; data_stack[psp] = data_stack[psp-1]; data_stack[psp-1] = tmp; }
void VM::funcOpAdd () { data_stack[psp - 1] += data_stack[psp]; psp--; }
void VM::funcOpSub () { data_stack[psp - 1] -= data_stack[psp]; psp--; }
void VM::funcOpMul () { data_stack[psp - 1] *= data_stack[psp]; psp--; }
void VM::funcOpDiv () { data_stack[psp - 1] /= data_stack[psp]; psp--; }
void VM::funcOpDot () { std::cout << data_stack[psp] << std::endl; }
void VM::funcOpHalt () { is_halt = true; }
void VM::funcOpNop () { }
void VM::funcOpLoad () { data_stack[psp] = storage[data_stack[psp]]; }
void VM::funcOpStore() { storage[data_stack[psp]] = data_stack[psp-1]; psp -= 2; }