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Eric

Virtual machine vaguely inspired on the JVM. Accepts .ere files and generates bytecode to be interpreted and ran on the Eric VM. Bytecode is ran on the VM as a stack based program.

Examples

Add two numbers

iconst 10
iconst 10
iadd
print

> 20

Function calls

iconst 100
call_to 1 1
halt

local 0
iconst 10
iadd
print
ret 0

> 110

Instructions

  • iconst: load integer on the stack
  • iadd: add to last numbers on the stack as integers
  • print: print last value on the stack
  • call: move instruction pointer to location in the bytecode
  • call_to: move instruction pointer relative to location of a call in the bytecode
  • ret: return from function call
  • halt: end program
  • local: load function arguments on the stack
  • if_cmp_eq: move to location if last two values are equal
  • rcpy: copy register value to stack
  • scpy: copy value on the stack to a register