EXPECT_EQ(10u, countLeadingZeros(NZ16));
EXPECT_EQ(26u, countLeadingZeros(NZ32));
EXPECT_EQ(58u, countLeadingZeros(NZ64));
+
+ EXPECT_EQ(8u, countLeadingZeros(0x00F000FFu));
+ EXPECT_EQ(8u, countLeadingZeros(0x00F12345u));
+ for (unsigned i = 0; i <= 30; ++i) {
+ EXPECT_EQ(31 - i, countLeadingZeros(1u << i));
+ }
+
+ EXPECT_EQ(8u, countLeadingZeros(0x00F1234500F12345ULL));
+ EXPECT_EQ(1u, countLeadingZeros(1ULL << 62));
+ for (unsigned i = 0; i <= 62; ++i) {
+ EXPECT_EQ(63 - i, countLeadingZeros(1ULL << i));
+ }
}
TEST(MathExtras, findFirstSet) {
EXPECT_EQ(0x1100FFEEDDCCBBAAULL, ByteSwap_64(0xAABBCCDDEEFF0011LL));
}
-TEST(MathExtras, CountLeadingZeros_32) {
- EXPECT_EQ(8u, CountLeadingZeros_32(0x00F000FF));
- EXPECT_EQ(8u, CountLeadingZeros_32(0x00F12345));
- for (unsigned i = 0; i <= 30; ++i) {
- EXPECT_EQ(31 - i, CountLeadingZeros_32(1 << i));
- }
-}
-
-TEST(MathExtras, CountLeadingZeros_64) {
- EXPECT_EQ(8u, CountLeadingZeros_64(0x00F1234500F12345LL));
- EXPECT_EQ(1u, CountLeadingZeros_64(1LL << 62));
- for (unsigned i = 0; i <= 62; ++i) {
- EXPECT_EQ(63 - i, CountLeadingZeros_64(1LL << i));
- }
-}
-
TEST(MathExtras, CountLeadingOnes_32) {
for (int i = 30; i >= 0; --i) {
// Start with all ones and unset some bit.