60 lines
1.4 KiB
C++
60 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
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#pragma once
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#include "Luau/RegisterA64.h"
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#include <stddef.h>
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namespace Luau
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{
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namespace CodeGen
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{
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namespace A64
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{
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enum class AddressKindA64 : uint8_t
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{
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reg, // reg + reg
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imm, // reg + imm
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pre, // reg + imm, reg += imm
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post, // reg, reg += imm
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};
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struct AddressA64
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{
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// This is a little misleading since AddressA64 can encode offsets up to 1023*size where size depends on the load/store size
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// 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
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static constexpr size_t kMaxOffset = 1023;
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constexpr AddressA64(RegisterA64 base, int off = 0, AddressKindA64 kind = AddressKindA64::imm)
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: kind(kind)
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, base(base)
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, offset(xzr)
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, data(off)
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{
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LUAU_ASSERT(base.kind == KindA64::x || base == sp);
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LUAU_ASSERT(kind != AddressKindA64::reg);
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}
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constexpr AddressA64(RegisterA64 base, RegisterA64 offset)
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: kind(AddressKindA64::reg)
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, base(base)
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, offset(offset)
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, data(0)
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{
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LUAU_ASSERT(base.kind == KindA64::x);
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LUAU_ASSERT(offset.kind == KindA64::x);
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}
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AddressKindA64 kind;
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RegisterA64 base;
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RegisterA64 offset;
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int data;
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};
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using mem = AddressA64;
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} // namespace A64
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} // namespace CodeGen
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} // namespace Luau
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