forked from KPGPMC/furlang
129 lines
2.8 KiB
C++
129 lines
2.8 KiB
C++
#ifndef FURVM_INSTRUCTION_HPP
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#define FURVM_INSTRUCTION_HPP
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#include "furvm/fwd.hpp"
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namespace furvm {
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enum class instruction_t : byte {
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/**
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* @brief No operation.
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*/
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NoOperation = 0,
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/**
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* @brief Pushes an integer from a byte onto the stack.
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*
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* Pushes an integer constructed from a next byte onto the stack.
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*/
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PushB2I,
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/**
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* @brief Pushes a constant onto the stack.
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*
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* Pushes a constant from the constant pool denoted by two next bytes in little-endian onto the stack.
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*/
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PushConstant,
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/**
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* @brief Pops top element from the stack.
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*/
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Drop,
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/**
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* @brief Duplicates top element on the stack.
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*/
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Duplicate,
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/**
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* @brief Clones top element on the stack.
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*/
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Clone,
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/**
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* @brief Adds two things together on the stack.
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*/
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Add,
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/**
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* @brief Subtracts two things together on the stack.
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*/
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Sub,
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/**
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* @brief Multiplies two things together on the stack.
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*/
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Mul,
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/**
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* @brief Divides two things together on the stack.
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*/
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Div,
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/**
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* @brief Modulos two things together on the stack.
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*/
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Mod,
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/**
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* @brief Pushes a variable onto the stack.
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*
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* Fetches a variable denoted by next two bytes in little-endian and pushes it onto the stack.
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*/
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Load,
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/**
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* @brief Stores an element from the stack in a variable.
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*
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* Pops a thing from the stack and stores it in a variable denoted by next two bytes in little-endian.
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*/
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Store,
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/**
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* @brief Calls a function.
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*
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* Calls a function denoted by next two bytes in little-endian from current frame's module.
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*/
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Call,
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/**
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* @brief Jumps to an instruction relative to the current instruction.
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*
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* Jumps to an instruction relative to the current instruction with offset denoted by next byte.
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*/
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Jump,
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/**
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* @brief Jumps to an instruction relative to the current instruction if top thing on the stack is not zero.
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*
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* Jumps to an instruction relative to the current instruction with offset denoted by next byte if the top thing on
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* the stack is not zero (is true).
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*/
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JumpNotZero,
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/**
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* @brief Pops the current call frame.
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*/
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Return,
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/**
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* @brief Pops the current call frame and pushes the first element from the previous stack onto the new stack.
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*/
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ReturnValue,
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};
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struct instruction {
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instruction_t type; /**< Instruction type. */
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/**
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* @brief Instruction value.
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*/
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union value {
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constant_index constant; /**< Constant instruction argument. */
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} value; /**< Instruction value. */
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};
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} // namespace furvm
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#endif // FURVM_INSTRUCTION_HPP
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