This document is a general overview of the Koi VM architecture. It is used internally as a design document and to keep track of what work still needs to be done.
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Integer
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Float
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String
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Array (coming later)
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Hash (coming later)
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Stack
PUSH_NIL PUSH_BOOL boolean PUSH_INT integer PUSH_FLOAT float PUSH_STRING string PUSH_ARRAY array PUSH_HASH hash x POP x SWAP x DUP x TOP number_of_stack_items
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Variables
x SET_LOCAL index x GET_LOCAL index x SET_GLOBAL index x GET_GLOBAL index
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Instruction Pointer
x ABS_JUMP x REL_JUMP destination_offset x JUMP_IF destination_offset x JUMP_UNLESS destination_offset
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Integers / Floats
x ADD x SUBTRACT x MULTIPLY x DIVIDE MODULO x INCREMENT x DECREMENT EQUAL NOT_EQUAL LESS_THAN GREATER_THAN EQUAL_LESS_THAN EQUAL_GREATER_THAN
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Strings
CONCATENATE LENGTH
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Arrays
x ARRAY_NEW x ARRAY_GET_INDEX x ARRAY_PUT_INDEX ARRAY_PUSH ARRAY_SIZE ARRAY_INCLUDE ARRAY_EXPLODE
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Hashes
x HASH_NEW x HASH_GET_KEY x HASH_PUT_KEY HASH_SIZE HASH_HAS_KEY HASH_EXPLODE
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Socket I/O
NEW_SOCKET_IO -
File I/O
x FILE_OPEN x FILE_PUT FILE_GET FILE_FLUSH FILE_CLOSE
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Anonymous Functions
FUNCTION_PUSH FUNCTION_END FUNCTION_CALL FUNCTION_RETURN
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Fibers
x FIBER_ID FIBER_LENGTH x FIBER_NEW x FIBER_DELETE FIBER_YIELD
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Misc
TYPE_OF x TO_STRING x EXIT
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StackError
Denotes that an error occurred when accessing items on the stack. The most likely cases are that there were not enough items on the stack for an opcode to work, or that the items were not of the correct type.
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OperandError
Denotes that an error occurred when reading an operand for an opcode. This may be because an operand was not supplied, or because it was not of the correct type.