37 lines · cpp
1#include "flang/Common/leading-zero-bit-count.h"2#include "flang/Testing/testing.h"3 4using Fortran::common::LeadingZeroBitCount;5 6int main() {7 MATCH(64, LeadingZeroBitCount(std::uint64_t{0}));8 for (int j{0}; j < 64; ++j) {9 for (int k{0}; k < j; ++k) {10 std::uint64_t x = (std::uint64_t{1} << j) | (std::uint64_t{1} << k);11 MATCH(63 - j, LeadingZeroBitCount(x))("j=%d, k=%d", j, k);12 }13 }14 MATCH(32, LeadingZeroBitCount(std::uint32_t{0}));15 for (int j{0}; j < 32; ++j) {16 for (int k{0}; k < j; ++k) {17 std::uint32_t x = (std::uint32_t{1} << j) | (std::uint32_t{1} << k);18 MATCH(31 - j, LeadingZeroBitCount(x))("j=%d, k=%d", j, k);19 }20 }21 MATCH(16, LeadingZeroBitCount(std::uint16_t{0}));22 for (int j{0}; j < 16; ++j) {23 for (int k{0}; k < j; ++k) {24 std::uint16_t x = (std::uint16_t{1} << j) | (std::uint16_t{1} << k);25 MATCH(15 - j, LeadingZeroBitCount(x))("j=%d, k=%d", j, k);26 }27 }28 MATCH(8, LeadingZeroBitCount(std::uint8_t{0}));29 for (int j{0}; j < 8; ++j) {30 for (int k{0}; k < j; ++k) {31 std::uint8_t x = (std::uint8_t{1} << j) | (std::uint8_t{1} << k);32 MATCH(7 - j, LeadingZeroBitCount(x))("j=%d, k=%d", j, k);33 }34 }35 return testing::Complete();36}37