luaur-code-gen 0.1.0

Native (A64/X64) code generation for Luau (Rust).
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21

use crate::records::ir_inst::IrInst;

macro_rules! CODEGEN_ASSERT {
    ($expr:expr) => {
        assert!($expr);
    };
}

impl crate::records::ir_function::IrFunction {
    pub fn get_inst_index(&self, inst: &IrInst) -> u32 {
        // Can only be called with instructions from our vector
        let inst_ptr = inst as *const IrInst as usize;
        let base_ptr = self.instructions.as_ptr() as usize;
        let end_ptr = unsafe { self.instructions.as_ptr().add(self.instructions.len()) } as usize;

        CODEGEN_ASSERT!(inst_ptr >= base_ptr && inst_ptr <= end_ptr);

        let offset = inst_ptr - base_ptr;
        (offset / core::mem::size_of::<IrInst>()) as u32
    }
}