55 lines
990 B
C++
55 lines
990 B
C++
#include "VM.hpp"
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namespace roza
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{
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/*explicit*/ VM::VM(StatusLog& log)
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: m_log { log }
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{
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}
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/*virtual*/ VM::~VM()
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{
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}
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void VM::exec(std::shared_ptr<Program> program)
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{
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while (m_pc < program->size())
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{
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switch (program->opcode(m_pc))
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{
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case OP_PUSH_CONST: {
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param_t param = *program->param(m_pc);
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push(param);
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m_pc++;
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} break;
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case OP_POP: {
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pop();
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m_pc++;
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} break;
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default:
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m_log.fatal(SrcLoc {},
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std::string()
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+ "cannot execute opcode '"
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+ OpcodeStr[program->opcode(m_pc)]
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+ "'"); break;
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}
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}
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}
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void VM::push(param_t param)
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{
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m_stack.push_back(param);
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}
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param_t VM::pop()
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{
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assert(m_stack.size() > 0);
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param_t res = m_stack.back();
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m_stack.pop_back();
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return res;
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}
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}
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