Merge branch 'master' into sync-condition-2023Oct11

2023-10-30 13:19:33 -07:00
parent 1bedd76e94 80390e6cb6
commit d7f1235b7d
41 changed files with 1486 additions and 156 deletions
--- a/tests/cpp/common/test_bitfield.cc
+++ b/tests/cpp/common/test_bitfield.cc
@@ -97,4 +97,29 @@ TEST(BitField, Clear) {
    TestBitFieldClear<RBitField8>(19);
  }
 }
+
+TEST(BitField, CTZ) {
+  {
+    auto cnt = TrailingZeroBits(0);
+    ASSERT_EQ(cnt, sizeof(std::uint32_t) * 8);
+  }
+  {
+    auto cnt = TrailingZeroBits(0b00011100);
+    ASSERT_EQ(cnt, 2);
+    cnt = detail::TrailingZeroBitsImpl(0b00011100);
+    ASSERT_EQ(cnt, 2);
+  }
+  {
+    auto cnt = TrailingZeroBits(0b00011101);
+    ASSERT_EQ(cnt, 0);
+    cnt = detail::TrailingZeroBitsImpl(0b00011101);
+    ASSERT_EQ(cnt, 0);
+  }
+  {
+    auto cnt = TrailingZeroBits(0b1000000000000000);
+    ASSERT_EQ(cnt, 15);
+    cnt = detail::TrailingZeroBitsImpl(0b1000000000000000);
+    ASSERT_EQ(cnt, 15);
+  }
+}
 }  // namespace xgboost