luau/CodeGen/include/Luau/AddressA64.h
vegorov-rbx d141a5c48d
Sync to upstream/release/572 (#899)
* Fixed exported types not being suggested in autocomplete
* `T...` is now convertible to `...any` (Fixes
https://github.com/Roblox/luau/issues/767)
* Fixed issue with `T?` not being convertible to `T | T` or `T?`
(sometimes when internal pointer identity is different)
* Fixed potential crash in missing table key error suggestion to use a
similar existing key
* `lua_topointer` now returns a pointer for strings

C++ API Changes:
* `prepareModuleScope` callback has moved from TypeChecker to Frontend
* For LSPs, AstQuery functions (and `isWithinComment`) can be used
without full Frontend data

A lot of changes in our two experimental components as well.

In our work on the new type-solver, the following issues were fixed:
* Fixed table union and intersection indexing
* Correct custom type environments are now used
* Fixed issue with values of `free & number` type not accepted in
numeric operations

And these are the changes in native code generation (JIT):
* arm64 lowering is almost complete with support for 99% of IR commands
and all fastcalls
* Fixed x64 assembly encoding for extended byte registers
* More external x64 calls are aware of register allocator
* `math.min`/`math.max` with more than 2 arguments are now lowered to IR
as well
* Fixed correctness issues with `math` library calls with multiple
results in variadic context and with x64 register conflicts
* x64 register allocator learnt to restore values from VM memory instead
of always using stack spills
* x64 exception unwind information now supports multiple functions and
fixes function start offset in Dwarf2 info
2023-04-14 11:06:22 -07:00

62 lines
1.4 KiB
C++

// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
#pragma once
#include "Luau/RegisterA64.h"
#include <stddef.h>
namespace Luau
{
namespace CodeGen
{
namespace A64
{
enum class AddressKindA64 : uint8_t
{
imm, // reg + imm
reg, // reg + reg
// TODO:
// reg + reg << shift
// reg + sext(reg) << shift
// reg + uext(reg) << shift
};
struct AddressA64
{
// This is a little misleading since AddressA64 can encode offsets up to 1023*size where size depends on the load/store size
// For example, ldr x0, [reg+imm] is limited to 8 KB offsets assuming imm is divisible by 8, but loading into w0 reduces the range to 4 KB
static constexpr size_t kMaxOffset = 1023;
constexpr AddressA64(RegisterA64 base, int off = 0)
: kind(AddressKindA64::imm)
, base(base)
, offset(xzr)
, data(off)
{
LUAU_ASSERT(base.kind == KindA64::x || base == sp);
}
constexpr AddressA64(RegisterA64 base, RegisterA64 offset)
: kind(AddressKindA64::reg)
, base(base)
, offset(offset)
, data(0)
{
LUAU_ASSERT(base.kind == KindA64::x);
LUAU_ASSERT(offset.kind == KindA64::x);
}
AddressKindA64 kind;
RegisterA64 base;
RegisterA64 offset;
int data;
};
using mem = AddressA64;
} // namespace A64
} // namespace CodeGen
} // namespace Luau