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