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