ZenGin Bytecode

Bytecode is read from DatFile.bytecode field

Bytecode Buffer

struct Bytecode {
    Instruction instructions[/* Read until there is no bytes left in the buffer */]
};

Instruction

struct Instruction {
    Opcode opcode,
    InstructionData data,
};

Opcode

enum Opcode: uint { ... }

Unused variants are commented out

enum Opcode: uint {
    zPAR_OP_PLUS         = 0,
    zPAR_OP_MINUS        = 1,
    zPAR_OP_MUL          = 2,
    zPAR_OP_DIV          = 3,
    zPAR_OP_MOD          = 4,
    zPAR_OP_OR           = 5,
    zPAR_OP_AND          = 6,
    zPAR_OP_LOWER        = 7,
    zPAR_OP_HIGHER       = 8,
    zPAR_OP_IS           = 9,
    zPAR_OP_LOG_OR       = 11,
    zPAR_OP_LOG_AND      = 12,
    zPAR_OP_SHIFTL       = 13,
    zPAR_OP_SHIFTR       = 14,
    zPAR_OP_LOWER_EQ     = 15,
    zPAR_OP_EQUAL        = 16,
    zPAR_OP_NOTEQUAL     = 17,
    zPAR_OP_HIGHER_EQ    = 18,
    zPAR_OP_ISPLUS       = 19,
    zPAR_OP_ISMINUS      = 20,
    zPAR_OP_ISMUL        = 21,
    zPAR_OP_ISDIV        = 22,
    // zPAR_OP_UNARY        = 30,
    zPAR_OP_UN_PLUS      = 30,
    zPAR_OP_UN_MINUS     = 31,
    zPAR_OP_UN_NOT       = 32,
    zPAR_OP_UN_NEG       = 33,
    // zPAR_OP_MAX          = 33,
    // zPAR_TOK_BRACKETON   = 40,
    // zPAR_TOK_BRACKETOFF  = 41,
    // zPAR_TOK_SEMIKOLON   = 42,
    // zPAR_TOK_KOMMA       = 43,
    // zPAR_TOK_SCHWEIF     = 44,
    zPAR_TOK_NONE        = 45,
    // zPAR_TOK_FLOAT       = 51,
    // zPAR_TOK_VAR         = 52,
    // zPAR_TOK_OPERATOR    = 53,
    zPAR_TOK_RET         = 60,
    zPAR_TOK_CALL        = 61,
    zPAR_TOK_CALLEXTERN  = 62,
    // zPAR_TOK_POPINT      = 63,
    zPAR_TOK_PUSHINT     = 64,
    zPAR_TOK_PUSHVAR     = 65,
    // zPAR_TOK_PUSHSTR     = 66,
    zPAR_TOK_PUSHINST    = 67,
    // zPAR_TOK_PUSHINDEX   = 68,
    // zPAR_TOK_POPVAR      = 69,
    zPAR_TOK_ASSIGNSTR   = 70,
    zPAR_TOK_ASSIGNSTRP  = 71,
    zPAR_TOK_ASSIGNFUNC  = 72,
    zPAR_TOK_ASSIGNFLOAT = 73,
    zPAR_TOK_ASSIGNINST  = 74,
    zPAR_TOK_JUMP        = 75,
    zPAR_TOK_JUMPF       = 76,
    zPAR_TOK_SETINSTANCE = 80,
    // zPAR_TOK_SKIP        = 90,
    // zPAR_TOK_LABEL       = 91,
    // zPAR_TOK_FUNC        = 92,
    // zPAR_TOK_FUNCEND     = 93,
    // zPAR_TOK_CLASS       = 94,
    // zPAR_TOK_CLASSEND    = 95,
    // zPAR_TOK_INSTANCE    = 96,
    // zPAR_TOK_INSTANCEEND = 97,
    // zPAR_TOK_NEWSTRING   = 98,
    zPAR_TOK_FLAGARRAY   = zPAR_TOK_VAR + 128
};

Instruction Data

Depending on opcode the data may be different or in most cases 0 sized.

CALL, JUMPF, JUMPPUSHINTCALLEXTERN, PUSHVAR, PUSHINST, SETINSTANCEPUSHVAR + FLAGARRAYany other

struct InstructionData {
    uint address;
};

struct InstructionData {
    int immediate;
};

struct InstructionData {
    uint symbol;
};

struct InstructionData {
    uint symbol;
    byte index;
};

struct InstructionData {};