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JitArm64: Implement fres

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This commit is contained in:
JosJuice
2021-05-02 22:12:00 +02:00
parent 41befc21cd
commit 85226e09f0
11 changed files with 237 additions and 12 deletions
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1
Source/UnitTests/Core/CMakeLists.txt
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@ -25,6 +25,7 @@ elseif(_M_ARM_64)
PowerPC/DivUtilsTest.cpp
PowerPC/JitArm64/ConvertSingleDouble.cpp
PowerPC/JitArm64/FPRF.cpp
PowerPC/JitArm64/Fres.cpp
PowerPC/JitArm64/MovI2R.cpp
)
else()

66
Source/UnitTests/Core/PowerPC/JitArm64/Fres.cpp Normal file
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@ -0,0 +1,66 @@
// Copyright 2021 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#include <functional>
#include "Common/Arm64Emitter.h"
#include "Common/BitUtils.h"
#include "Common/CommonTypes.h"
#include "Core/PowerPC/Interpreter/Interpreter_FPUtils.h"
#include "Core/PowerPC/JitArm64/Jit.h"
#include "Core/PowerPC/PowerPC.h"
#include "../TestValues.h"
#include <gtest/gtest.h>
namespace
{
using namespace Arm64Gen;
class TestFres : public JitArm64
{
public:
TestFres()
{
AllocCodeSpace(4096);
const u8* raw_fres = GetCodePtr();
GenerateFres();
fres = Common::BitCast<u64 (*)(u64)>(GetCodePtr());
MOV(ARM64Reg::X15, ARM64Reg::X30);
MOV(ARM64Reg::X14, PPC_REG);
MOVP2R(PPC_REG, &PowerPC::ppcState);
MOV(ARM64Reg::X1, ARM64Reg::X0);
m_float_emit.FMOV(ARM64Reg::D0, ARM64Reg::X0);
m_float_emit.FRECPE(ARM64Reg::D0, ARM64Reg::D0);
BL(raw_fres);
MOV(ARM64Reg::X30, ARM64Reg::X15);
MOV(PPC_REG, ARM64Reg::X14);
RET();
}
std::function<u64(u64)> fres;
};
} // namespace
TEST(JitArm64, Fres)
{
TestFres test;
for (const u64 ivalue : double_test_values)
{
const double dvalue = Common::BitCast<double>(ivalue);
const u64 expected = Common::BitCast<u64>(Common::ApproximateReciprocal(dvalue));
const u64 actual = test.fres(ivalue);
if (expected != actual)
fmt::print("{:016x} -> {:016x} == {:016x}\n", ivalue, actual, expected);
EXPECT_EQ(expected, actual);
}
}

22
Source/UnitTests/Core/PowerPC/TestValues.h
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@ -8,7 +8,7 @@
#include "Common/CommonTypes.h"
constexpr std::array<u64, 49> double_test_values{
constexpr std::array<u64, 57> double_test_values{
// Special values
0x0000'0000'0000'0000, // positive zero
0x0000'0000'0000'0001, // smallest positive denormal
@ -54,13 +54,25 @@ constexpr std::array<u64, 49> double_test_values{
0x3680'1234'5678'9ABC, 0x36A0'1234'5678'9ABC, 0x36B0'1234'5678'9ABC, 0xB680'1234'5678'9ABC,
0xB6A0'1234'5678'9ABC, 0xB6B0'1234'5678'9ABC,
// (exp > 1148) Boundary case for fres
0x47C0'0000'0000'0000, // 2^125 = fres result is non-zero
0x47D0'0000'0000'0000, // 2^126 = fres result is zero
0xC7C0'0000'0000'0000, // -2^125 = fres result is non-zero
0xC7D0'0000'0000'0000, // -2^126 = fres result is zero
// (exp < 895) Boundary case for fres
0x37F0'0000'0000'0000, // 2^(-128) = fres result is non-max
0x37E0'0000'0000'0000, // 2^(-129) = fres result is max
0xB7F0'0000'0000'0000, // -2^(-128) = fres result is non-max
0xB7E0'0000'0000'0000, // -2^(-129) = fres result is max
// Some typical numbers
0x3FF8'0000'0000'0000, // 1.5
0x408F'4000'0000'0000, // 1000
0xC008'0000'0000'0000, // -3
};
constexpr std::array<u32, 29> single_test_values{
constexpr std::array<u32, 33> single_test_values{
// Special values
0x0000'0000, // positive zero
0x0000'0001, // smallest positive denormal
@ -89,6 +101,12 @@ constexpr std::array<u32, 29> single_test_values{
0xFFC0'0000, // first negative QNaN
0xFFFF'FFFF, // last negative QNaN
// (exp > 252) Boundary case for fres
0x7E00'0000, // 2^125 = fres result is non-zero
0x7E80'0000, // 2^126 = fres result is zero
0xC7C0'0000, // -2^125 = fres result is non-zero
0xC7D0'0000, // -2^126 = fres result is zero
// Some typical numbers
0x3FC0'0000, // 1.5
0x447A'0000, // 1000

1
Source/UnitTests/UnitTests.vcxproj
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@ -84,6 +84,7 @@
<ItemGroup Condition="'$(Platform)'=='ARM64'">
<ClCompile Include="Core\PowerPC\JitArm64\ConvertSingleDouble.cpp" />
<ClCompile Include="Core\PowerPC\JitArm64\FPRF.cpp" />
<ClCompile Include="Core\PowerPC\JitArm64\Fres.cpp" />
<ClCompile Include="Core\PowerPC\JitArm64\MovI2R.cpp" />
</ItemGroup>
<ItemGroup>