From 825a10616c58e0dd7a733fed9d684ccadc97826c Mon Sep 17 00:00:00 2001 From: Bram Speeckaert Date: Sat, 23 Mar 2024 13:02:41 +0100 Subject: DivUtils: Add unsigned division magic function Takes the logic from Jit64 and moves it into DivUtils, so it can be reused by other backends as well. --- Source/UnitTests/Core/PowerPC/DivUtilsTest.cpp | 41 ++++++++++++++++++++++---- 1 file changed, 35 insertions(+), 6 deletions(-) (limited to 'Source/UnitTests/Core/PowerPC/DivUtilsTest.cpp') diff --git a/Source/UnitTests/Core/PowerPC/DivUtilsTest.cpp b/Source/UnitTests/Core/PowerPC/DivUtilsTest.cpp index 894d0f628a..b218745849 100644 --- a/Source/UnitTests/Core/PowerPC/DivUtilsTest.cpp +++ b/Source/UnitTests/Core/PowerPC/DivUtilsTest.cpp @@ -9,12 +9,12 @@ using namespace JitCommon; TEST(DivUtils, Signed) { - Magic m3 = SignedDivisionConstants(3); - Magic m5 = SignedDivisionConstants(5); - Magic m7 = SignedDivisionConstants(7); - Magic minus3 = SignedDivisionConstants(-3); - Magic minus5 = SignedDivisionConstants(-5); - Magic minus7 = SignedDivisionConstants(-7); + SignedMagic m3 = SignedDivisionConstants(3); + SignedMagic m5 = SignedDivisionConstants(5); + SignedMagic m7 = SignedDivisionConstants(7); + SignedMagic minus3 = SignedDivisionConstants(-3); + SignedMagic minus5 = SignedDivisionConstants(-5); + SignedMagic minus7 = SignedDivisionConstants(-7); EXPECT_EQ(0x55555556, m3.multiplier); EXPECT_EQ(0, m3.shift); @@ -30,3 +30,32 @@ TEST(DivUtils, Signed) EXPECT_EQ(0x6DB6DB6D, minus7.multiplier); EXPECT_EQ(2, minus7.shift); } + +TEST(DivUtils, Unsigned) +{ + UnsignedMagic m3 = UnsignedDivisionConstants(3); + UnsignedMagic m5 = UnsignedDivisionConstants(5); + UnsignedMagic m7 = UnsignedDivisionConstants(7); + UnsignedMagic m9 = UnsignedDivisionConstants(9); + UnsignedMagic m19 = UnsignedDivisionConstants(19); + + EXPECT_EQ(0xAAAAAAABU, m3.multiplier); + EXPECT_EQ(1, m3.shift); + EXPECT_TRUE(m3.fast); + + EXPECT_EQ(0xCCCCCCCDU, m5.multiplier); + EXPECT_EQ(2, m5.shift); + EXPECT_TRUE(m5.fast); + + EXPECT_EQ(0x92492492U, m7.multiplier); + EXPECT_EQ(2, m7.shift); + EXPECT_FALSE(m7.fast); + + EXPECT_EQ(0x38E38E39U, m9.multiplier); + EXPECT_EQ(1, m9.shift); + EXPECT_TRUE(m9.fast); + + EXPECT_EQ(0xD79435E5U, m19.multiplier); + EXPECT_EQ(4, m19.shift); + EXPECT_FALSE(m19.fast); +} -- cgit v1.2.3