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https://github.com/dolphin-emu/dolphin
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825a10616c
Takes the logic from Jit64 and moves it into DivUtils, so it can be reused by other backends as well.
62 lines
1.7 KiB
C++
62 lines
1.7 KiB
C++
// Copyright 2021 Dolphin Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include <gtest/gtest.h>
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#include "Core/PowerPC/JitCommon/DivUtils.h"
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using namespace JitCommon;
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TEST(DivUtils, Signed)
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{
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SignedMagic m3 = SignedDivisionConstants(3);
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SignedMagic m5 = SignedDivisionConstants(5);
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SignedMagic m7 = SignedDivisionConstants(7);
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SignedMagic minus3 = SignedDivisionConstants(-3);
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SignedMagic minus5 = SignedDivisionConstants(-5);
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SignedMagic minus7 = SignedDivisionConstants(-7);
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EXPECT_EQ(0x55555556, m3.multiplier);
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EXPECT_EQ(0, m3.shift);
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EXPECT_EQ(0x66666667, m5.multiplier);
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EXPECT_EQ(1, m5.shift);
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EXPECT_EQ(-0x6DB6DB6D, m7.multiplier);
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EXPECT_EQ(2, m7.shift);
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EXPECT_EQ(-0x55555556, minus3.multiplier);
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EXPECT_EQ(0, minus3.shift);
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EXPECT_EQ(-0x66666667, minus5.multiplier);
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EXPECT_EQ(1, minus5.shift);
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EXPECT_EQ(0x6DB6DB6D, minus7.multiplier);
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EXPECT_EQ(2, minus7.shift);
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}
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TEST(DivUtils, Unsigned)
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{
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UnsignedMagic m3 = UnsignedDivisionConstants(3);
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UnsignedMagic m5 = UnsignedDivisionConstants(5);
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UnsignedMagic m7 = UnsignedDivisionConstants(7);
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UnsignedMagic m9 = UnsignedDivisionConstants(9);
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UnsignedMagic m19 = UnsignedDivisionConstants(19);
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EXPECT_EQ(0xAAAAAAABU, m3.multiplier);
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EXPECT_EQ(1, m3.shift);
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EXPECT_TRUE(m3.fast);
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EXPECT_EQ(0xCCCCCCCDU, m5.multiplier);
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EXPECT_EQ(2, m5.shift);
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EXPECT_TRUE(m5.fast);
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EXPECT_EQ(0x92492492U, m7.multiplier);
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EXPECT_EQ(2, m7.shift);
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EXPECT_FALSE(m7.fast);
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EXPECT_EQ(0x38E38E39U, m9.multiplier);
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EXPECT_EQ(1, m9.shift);
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EXPECT_TRUE(m9.fast);
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EXPECT_EQ(0xD79435E5U, m19.multiplier);
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EXPECT_EQ(4, m19.shift);
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EXPECT_FALSE(m19.fast);
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}
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