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// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
// SPDX-License-Identifier: GPL-3.0-or-later
/* This file is part of the dynarmic project.
* Copyright (c) 2023 MerryMage
* SPDX-License-Identifier: 0BSD
*/
#include <array>
#include <exception>
#include "common/container/unordered_map.h"
#include <catch2/catch_test_macros.hpp>
#include "common/common_types.h"
#include <oaknut/oaknut.hpp>
#include "dynarmic/interface/A64/a64.h"
using namespace Dynarmic;
namespace {
class MyEnvironment final : public A64::UserCallbacks {
public:
u64 ticks_left = 0;
::Common::unordered_map<u64, u8> memory{};
u64 MemoryRead(u64 vaddr, size_t size) override {
switch (size) {
case sizeof(u64):
return MemoryRead(vaddr, sizeof(u32))
| MemoryRead(vaddr + sizeof(u32), sizeof(u32)) << 32;
case sizeof(u32):
return MemoryRead(vaddr, sizeof(u16))
| MemoryRead(vaddr + sizeof(u16), sizeof(u16)) << 16;
case sizeof(u16):
return MemoryRead(vaddr, sizeof(u8))
| MemoryRead(vaddr + sizeof(u8), sizeof(u8)) << 8;
case sizeof(u8):
return memory[vaddr];
default:
std::abort();
}
}
std::array<u64, 2> MemoryRead128(u64 vaddr) override {
return {
MemoryRead(vaddr, sizeof(u64)),
MemoryRead(vaddr + sizeof(u64), sizeof(u64))
};
}
void MemoryWrite(Dynarmic::A64::VAddr vaddr, u64 value, size_t size) override {
switch (size) {
case sizeof(u64):
MemoryWrite(vaddr, u32(value), sizeof(u32));
MemoryWrite(vaddr + 4, u32(value >> 32), sizeof(u32));
break;
case sizeof(u32):
MemoryWrite(vaddr, u16(value), sizeof(u16));
MemoryWrite(vaddr + 2, u16(value >> 16), sizeof(u16));
break;
case sizeof(u16):
MemoryWrite(vaddr, u8(value), sizeof(u8));
MemoryWrite(vaddr + 1, u8(value >> 8), sizeof(u8));
break;
case sizeof(u8):
memory[vaddr] = value;
break;
default:
std::abort();
}
}
void MemoryWrite128(u64 vaddr, std::array<u64, 2> value) override {
MemoryWrite(vaddr, value[0], sizeof(u64));
MemoryWrite(vaddr + 8, value[1], sizeof(u64));
}
void CallSVC(u32) override {
// Do something.
}
void ExceptionRaised(u64, A64::Exception) override {
cpu->HaltExecution();
}
void AddTicks(u64) override {
}
u64 GetTicksRemaining() override {
return 1000000000000;
}
std::uint64_t GetCNTPCT() override {
return 0;
}
A64::Jit* cpu;
};
} // namespace
TEST_CASE("A64: fibonacci", "[a64]") {
MyEnvironment env;
A64::UserConfig user_config;
user_config.callbacks = &env;
A64::Jit cpu{user_config};
env.cpu = &cpu;
std::vector<u32> instructions(1024);
oaknut::CodeGenerator code{instructions.data(), nullptr};
using namespace oaknut::util;
oaknut::Label start, end, zero, recurse;
code.l(start);
code.STP(X29, X30, SP, PRE_INDEXED, -32);
code.STP(X20, X19, SP, 16);
code.MOV(X29, SP);
code.MOV(W19, W0);
code.SUBS(W0, W0, 1);
code.B(LT, zero);
code.B(NE, recurse);
code.MOV(W0, 1);
code.B(end);
code.l(zero);
code.MOV(W0, WZR);
code.B(end);
code.l(recurse);
code.BL(start);
code.MOV(W20, W0);
code.SUB(W0, W19, 2);
code.BL(start);
code.ADD(W0, W0, W20);
code.l(end);
code.LDP(X20, X19, SP, 16);
code.LDP(X29, X30, SP, POST_INDEXED, 32);
code.RET();
for (size_t i = 0; i < 1024; i++) {
env.MemoryWrite(i * 4, instructions[i], sizeof(u32));
}
env.MemoryWrite(8888, 0xd4200000, sizeof(u32));
cpu.SetRegister(30, 8888);
cpu.SetRegister(0, 10);
cpu.SetSP(0xffff0000);
cpu.SetPC(0);
cpu.Run();
REQUIRE(cpu.GetRegister(0) == 55);
cpu.SetRegister(0, 20);
cpu.SetSP(0xffff0000);
cpu.SetPC(0);
cpu.Run();
REQUIRE(cpu.GetRegister(0) == 6765);
cpu.SetRegister(0, 30);
cpu.SetSP(0xffff0000);
cpu.SetPC(0);
cpu.Run();
REQUIRE(cpu.GetRegister(0) == 832040);
}
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