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19 lines
578 B
C++
19 lines
578 B
C++
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namespace Common {
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std::pair<u64, u64> udiv128(u128 dividend, u64 divisor) {
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u64 remainder = dividend[0] % divisor;
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u64 accum = dividend[0] / divisor;
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if (dividend[1] == 0)
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return {accum, remainder};
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// We ignore dividend[1] / divisor as that overflows
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u64 first_segment = (dividend[1] % divisor) << 32;
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accum += (first_segment / divisor) << 32;
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u64 second_segment = (first_segment % divisor) << 32;
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accum += (second_segment / divisor);
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remainder += second_segment % divisor;
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return {accum, remainder};
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}
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} // namespace Common
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