.instructionset

We've now reversed all the VM instructions, and have a full understanding about how it works. Here is the VM's instruction set:

Instruction	1st arg	2nd arg	What does it do?
"A"	"M"	arg2	*sym.current_memory_ptr += arg2
	"P"	arg2	sym.current_memory_ptr += arg2
	"C"	arg2	sym.written_by_instr_C += arg2
"S"	"M"	arg2	*sym.current_memory_ptr -= arg2
	"P"	arg2	sym.current_memory_ptr -= arg2
	"C"	arg2	sym.written_by_instr_C -= arg2
"I"	arg1	n/a	instr_A(arg1, 1)
"D"	arg1	n/a	instr_S(arg1, 1)
"P"	arg1	n/a	*sym.current_memory_ptr = arg1; instr_I("P")
"X"	arg1	n/a	*sym.current_memory_ptr ^= arg1
"J"	arg1	n/a	arg1_and_0x3f = arg1 & 0x3f; if (arg1 & 0x40 != 0)   arg1_and_0x3f *= -1 if (arg1 >= 0) return arg1_and_0x3f; else if (*sym.written_by_instr_C != 0) {   if (arg1_and_0x3f < 0)     ++*sym.good_if_ne_zero;   return arg1_and_0x3f; } else return 2;
"C"	arg1	n/a	*sym.written_by_instr_C = arg1
"R"	arg1	n/a	return(arg1)