diff options
Diffstat (limited to 'unittests/ADT/APFloatTest.cpp')
-rw-r--r-- | unittests/ADT/APFloatTest.cpp | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/unittests/ADT/APFloatTest.cpp b/unittests/ADT/APFloatTest.cpp index c8d7177d86..48d5d83019 100644 --- a/unittests/ADT/APFloatTest.cpp +++ b/unittests/ADT/APFloatTest.cpp @@ -737,4 +737,40 @@ TEST(APFloatTest, convert) { EXPECT_EQ(4294967295.0, test.convertToDouble()); EXPECT_FALSE(losesInfo); } + +TEST(APFloatTest, PPCDoubleDouble) { + APFloat test(APFloat::PPCDoubleDouble, "1.0"); + EXPECT_EQ(0x3ff0000000000000ull, test.bitcastToAPInt().getRawData()[0]); + EXPECT_EQ(0x0000000000000000ull, test.bitcastToAPInt().getRawData()[1]); + + test.divide(APFloat(APFloat::PPCDoubleDouble, "3.0"), APFloat::rmNearestTiesToEven); + EXPECT_EQ(0x3fd5555555555555ull, test.bitcastToAPInt().getRawData()[0]); + EXPECT_EQ(0x3c75555555555556ull, test.bitcastToAPInt().getRawData()[1]); + + // LDBL_MAX + test = APFloat(APFloat::PPCDoubleDouble, "1.79769313486231580793728971405301e+308"); + EXPECT_EQ(0x7fefffffffffffffull, test.bitcastToAPInt().getRawData()[0]); + EXPECT_EQ(0x7c8ffffffffffffeull, test.bitcastToAPInt().getRawData()[1]); + + // LDBL_MIN + test = APFloat(APFloat::PPCDoubleDouble, "2.00416836000897277799610805135016e-292"); + EXPECT_EQ(0x0360000000000000ull, test.bitcastToAPInt().getRawData()[0]); + EXPECT_EQ(0x0000000000000000ull, test.bitcastToAPInt().getRawData()[1]); + + test = APFloat(APFloat::PPCDoubleDouble, "1.0"); + test.add(APFloat(APFloat::PPCDoubleDouble, "0x1p-105"), APFloat::rmNearestTiesToEven); + EXPECT_EQ(0x3ff0000000000000ull, test.bitcastToAPInt().getRawData()[0]); + EXPECT_EQ(0x3960000000000000ull, test.bitcastToAPInt().getRawData()[1]); + + test = APFloat(APFloat::PPCDoubleDouble, "1.0"); + test.add(APFloat(APFloat::PPCDoubleDouble, "0x1p-106"), APFloat::rmNearestTiesToEven); + EXPECT_EQ(0x3ff0000000000000ull, test.bitcastToAPInt().getRawData()[0]); +#if 0 // XFAIL + // This is what we would expect with a true double-double implementation + EXPECT_EQ(0x3950000000000000ull, test.bitcastToAPInt().getRawData()[1]); +#else + // This is what we get with our 106-bit mantissa approximation + EXPECT_EQ(0x0000000000000000ull, test.bitcastToAPInt().getRawData()[1]); +#endif +} } |