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// Copyright 2023 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include <bit>
#include "Common/Arm64Emitter.h"
#include "Common/BitSet.h"
#include <gtest/gtest.h>
using namespace Arm64Gen;
namespace
{
u32 ZeroParameterFunction()
{
return 123;
}
u32 OneParameterFunction(u64 a)
{
return a + 23;
}
u32 TwoParameterFunction(u64 a, u64 b)
{
return a * 10 + b + 3;
}
u32 ThreeParameterFunction(u64 a, u64 b, u64 c)
{
return a * 10 + b + c / 10;
}
u32 EightParameterFunction(u64 a, u64 b, u64 c, u64 d, u64 e, u64 f, u64 g, u64 h)
{
return a / 20 + b / 8 + c / 10 + d / 2 + e / 5 - f + g + h / 3;
}
class TestCallFunction : public ARM64CodeBlock
{
public:
TestCallFunction() { AllocCodeSpace(4096); }
template <typename F>
void Emit(F f)
{
ResetCodePtr();
m_code_pointer = GetCodePtr();
{
const Common::ScopedJITPageWriteAndNoExecute enable_jit_page_writes;
constexpr BitSet32 link_register{DecodeReg(ARM64Reg::X30)};
ABI_PushRegisters(link_register);
f();
ABI_PopRegisters(link_register);
RET();
}
FlushIcacheSection(const_cast<u8*>(m_code_pointer), const_cast<u8*>(GetCodePtr()));
}
void Run()
{
const u64 actual = std::bit_cast<u64 (*)()>(m_code_pointer)();
constexpr u64 expected = 123;
EXPECT_EQ(expected, actual);
}
private:
const u8* m_code_pointer = nullptr;
};
} // namespace
TEST(Arm64Emitter, CallFunction_ZeroParameters)
{
TestCallFunction test;
test.Emit([&] { test.ABI_CallFunction(&ZeroParameterFunction); });
test.Run();
}
TEST(Arm64Emitter, CallFunction_OneConstantParameter)
{
TestCallFunction test;
test.Emit([&] { test.ABI_CallFunction(&OneParameterFunction, 100); });
test.Run();
}
TEST(Arm64Emitter, CallFunction_OneRegisterParameterNoMov)
{
TestCallFunction test;
test.Emit([&] {
test.MOVI2R(ARM64Reg::X0, 100);
test.ABI_CallFunction(&OneParameterFunction, ARM64Reg::X0);
});
test.Run();
}
TEST(Arm64Emitter, CallFunction_OneRegisterParameterMov)
{
TestCallFunction test;
test.Emit([&] {
test.MOVI2R(ARM64Reg::X8, 100);
test.ABI_CallFunction(&OneParameterFunction, ARM64Reg::X8);
});
test.Run();
}
TEST(Arm64Emitter, CallFunction_TwoRegistersMixed)
{
TestCallFunction test;
test.Emit([&] {
test.MOVI2R(ARM64Reg::X0, 20);
test.ABI_CallFunction(&TwoParameterFunction, 10, ARM64Reg::X0);
});
test.Run();
}
TEST(Arm64Emitter, CallFunction_TwoRegistersCycle)
{
TestCallFunction test;
test.Emit([&] {
test.MOVI2R(ARM64Reg::X0, 20);
test.MOVI2R(ARM64Reg::X1, 10);
test.ABI_CallFunction(&TwoParameterFunction, ARM64Reg::X1, ARM64Reg::X0);
});
test.Run();
}
TEST(Arm64Emitter, CallFunction_ThreeRegistersMixed)
{
TestCallFunction test;
test.Emit([&] {
test.MOVI2R(ARM64Reg::X1, 10);
test.MOVI2R(ARM64Reg::X2, 20);
test.ABI_CallFunction(&ThreeParameterFunction, ARM64Reg::X1, ARM64Reg::X2, 30);
});
test.Run();
}
TEST(Arm64Emitter, CallFunction_ThreeRegistersCycle1)
{
TestCallFunction test;
test.Emit([&] {
test.MOVI2R(ARM64Reg::X0, 30);
test.MOVI2R(ARM64Reg::X1, 10);
test.MOVI2R(ARM64Reg::X2, 20);
test.ABI_CallFunction(&ThreeParameterFunction, ARM64Reg::X1, ARM64Reg::X2, ARM64Reg::X0);
});
test.Run();
}
TEST(Arm64Emitter, CallFunction_ThreeRegistersCycle2)
{
TestCallFunction test;
test.Emit([&] {
test.MOVI2R(ARM64Reg::X0, 20);
test.MOVI2R(ARM64Reg::X1, 30);
test.MOVI2R(ARM64Reg::X2, 10);
test.ABI_CallFunction(&ThreeParameterFunction, ARM64Reg::X2, ARM64Reg::X0, ARM64Reg::X1);
});
test.Run();
}
TEST(Arm64Emitter, CallFunction_EightRegistersMixed)
{
TestCallFunction test;
test.Emit([&] {
test.MOVI2R(ARM64Reg::X3, 12);
test.MOVI2R(ARM64Reg::X4, 23);
test.MOVI2R(ARM64Reg::X5, 24);
test.MOVI2R(ARM64Reg::X30, 2000);
test.ABI_CallFunction(&EightParameterFunction, ARM64Reg::X30, 40, ARM64Reg::X4, ARM64Reg::X5,
ARM64Reg::X4, ARM64Reg::X3, 5, ARM64Reg::X4);
});
test.Run();
}
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