Instructions

Bytecode Instructions

1. Memory Management Instructions:
   • iload, uload, fload: Load an integer, unsigned integer or float from a local variable onto the operand stack. It takes the index and the size of the variable as arguments.
   • istore, ustore, fstore: Store an integer, unsigned integer or float at the top of the operand stack, into a local variable. It takes the index and the size of the variable as arguments.
   • iconst, uconst, fconst: Load an integer, unsigned integer or float from an argument onto the operand stack. It takes and the size of the variable and the variable as arguments.
   • funk: Creates a function with a number of instructions, written in bytes (8bits) as argument
2. Arithmetic Instructions:
   • iadd, fadd: Add two (unsigned) integers or floats.
   • isub, fsub: Subtract two (unsigned) integers or floats.
   • imul, fmul: Multiply two (unsigned) integers or floats.
   • idiv, fdiv: Divide two (unsigned) integers or floats.
   • imod: Remainder after integer division.
3. Comparison and Conditional Instructions:
   • ieq, ine, ilt, igt, ile, ige: Compare two (unsigned) integers. (==, !=, <, >, <=, >=)
   • feq, fne, flt, fgt, fle, fge: Compare two floats. (==, !=, <, >, <=, >=)
   • ift: Conditional jumps if true, take the number of bytes to jump as argument.
   • iff: Conditional jumps if false, take the number of bytes to jump as argument.
   • goto: Unconditional jump, take the number of bytes to jump as argument.
4. Logical Instructions:
   • iand, ior, ixor: Bitwise AND, OR, XOR for integers.
5. Control Flow Instructions:
   • invoke: Invoke method.
   • return: Return from the current method.
6. Type Conversion Instructions:
   • i2f, f2i: Convert integer to float or float to integer.
7. Stack Instructions:
   • pop: Pop the top element from the operand stack.
   • dup: Duplicate the top element on the operand stack.
   • popPrev: Pop the element below the top element from the operand stack.
   • iloadStack, floadStack, uloadStack: Load an integer, unsigned integer or float from the operand stack onto the operand stack. It takes the index and the size of the variable as arguments.
8. Bitwise Instructions:
   • not: Bitwise NOT for integers.
9. Type Conversion Instructions:
   • iconvert, uconvert, fconvert: Convert integer to unsigned integer or float, unsigned integer to integer or float, float to integer or unsigned integer.
10. Memory Access Instructions:
    • addr: Get the address of a variable.
    • access: Access a variable at a given address.
    • modify: Modify a variable at a given address.
    • write: Write a value in the stdout.
    • allocate: Allocate a given number of bytes on the heap.
    • getArg: Get the argument at a given index.

Bin Code	Instruction	Argument
0x00	funk	True
0x01 ... 0x03	iload, fload, uload	True
0x04 ... 0x06	istore, fstore, ustore	True
0x07 ... 0x09	iconst, fconst, uconst	True
0x0A, 0x0B	iadd, fadd	False
0x0C, 0x0D	isub, fsub	False
0x0E, 0x0F	imul, fmul	False
0x10, 0x11	idiv, fdiv	False
0x12	imod	False
0x13 ... 0x18	ieq, ine, ilt, igt, ile, ige	False
0x19 ... 0x1E	feq, fne, flt, fgt, fle, fge	False
0x1F, 0x20	ift, iff	True
0x21	goto	True
0x22 ... 0x24	iand, ior, ixor	False
0x25	invoke	True
0x26	return	False
0x27, 0x28	i2f, f2i	False
0x29	pop	True
0x2A	dup	True
0x2B	popPrev	True
0x2C ... 0x2E	iloadStack, floadStack, uloadStack	True
0x2F	not	False
0x30 ... 0x32	iconvert, uconvert, fconvert	True
0x33	addr	True
0x34	access	False
0x35	modify	False
0x36	write	False
0x37	allocate	False
0x38	getArg	False