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Diffstat (limited to 'unittests/ADT/APFloatTest.cpp')
| -rw-r--r-- | unittests/ADT/APFloatTest.cpp | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/unittests/ADT/APFloatTest.cpp b/unittests/ADT/APFloatTest.cpp index 964b04da47..dea4a65b88 100644 --- a/unittests/ADT/APFloatTest.cpp +++ b/unittests/ADT/APFloatTest.cpp @@ -576,4 +576,27 @@ TEST(APFloatTest, StringHexadecimalExponentDeath) { #endif #endif +TEST(APFloatTest, exactInverse) { + APFloat inv(0.0f); + + // Trivial operation. + EXPECT_TRUE(APFloat(2.0).getExactInverse(&inv)); + EXPECT_TRUE(inv.bitwiseIsEqual(APFloat(0.5))); + EXPECT_TRUE(APFloat(2.0f).getExactInverse(&inv)); + EXPECT_TRUE(inv.bitwiseIsEqual(APFloat(0.5f))); + + // FLT_MIN + EXPECT_TRUE(APFloat(1.17549435e-38f).getExactInverse(&inv)); + EXPECT_TRUE(inv.bitwiseIsEqual(APFloat(8.5070592e+37f))); + + // Large float + EXPECT_TRUE(APFloat(1.7014118e38f).getExactInverse(&inv)); + EXPECT_TRUE(inv.bitwiseIsEqual(APFloat(5.8774718e-39f))); + + // Zero + EXPECT_FALSE(APFloat(0.0).getExactInverse(0)); + // Denormalized float + EXPECT_FALSE(APFloat(1.40129846e-45f).getExactInverse(0)); +} + } |