nitrogen

An interpreted programming language written in Go.

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Runtime VM

This implementation of Nitrogen runs on a bytecode virtual machine core called Elemental. In general it’s faster and more efficient than the old interpreter. With the VM, source code goes through a full compile stage before being executed including when using the REPL. This implementation does not have a JIT compiler and does not compile to machine assembly but instead to a higher level assembly-like bytecode.

Opcodes

These are all the opcodes used in this implementation.

NOOP

LOAD_CONST

LOAD_FAST

STORE_FAST

DELETE_FAST

DEFINE

LOAD_GLOBAL

STORE_GLOBAL

LOAD_INDEX

STORE_INDEX

LOAD_ATTRIBUTE

STORE_ATTRIBUTE

BINARY_ADD

BINARY_SUB

BINARY_MUL

BINARY_DIVIDE

BINARY_MOD

BINARY_SHIFTL

BINARY_SHIFTR

BINARY_AND

BINARY_OR

BINARY_NOT

BINARY_ANDNOT

IMPLEMENTS

UNARY_NEG

UNARY_NOT

COMPARE

CALL

RETURN

POP

MAKE_ARRAY

MAKE_MAP

MAKE_FUNCTION

POP_JUMP_IF_TRUE

POP_JUMP_IF_FALSE

JUMP_IF_TRUE_OR_POP

JUMP_IF_FALSE_OR_POP

JUMP_ABSOLUTE

JUMP_FORWARD

START_BLOCK

END_BLOCK

START_LOOP

CONTINUE

NEXT_ITER

BREAK

RECOVER

BUILD_CLASS

MAKE_INSTANCE

IMPORT

DUP

GET_ITER

BREAKPOINT