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
22
23
24
25
26
27
28
29
30
31
32

use crate::macros::codegen_assert::CODEGEN_ASSERT;
use crate::records::assembly_builder_x_64::AssemblyBuilderX64;

impl AssemblyBuilderX64 {
    pub fn finalize(&mut self) -> bool {
        let code_size = (self.code_pos as usize).wrapping_sub(self.code.as_ptr() as usize);
        self.code.resize(code_size, 0);

        for fixup in self.pending_labels.iter().copied() {
            let location = self.label_locations[(fixup.id - 1) as usize];
            if !(location != !0u32) {
                luaur_common::LUAU_DEBUGBREAK!();
            }
            let value = location.wrapping_sub(fixup.location.wrapping_add(4));
            let offset = fixup.location as usize;
            self.code[offset..offset + 4].copy_from_slice(&value.to_le_bytes());
        }

        let data_size = self.data.len() - self.data_pos;

        if data_size > 0 {
            self.data
                .copy_within(self.data_pos..self.data_pos + data_size, 0);
        }

        self.data.resize(data_size, 0);

        self.finalized = true;

        true
    }
}