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Created June 14, 2020 20:27
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struct GmpDiv {
uint64_t operator()(uint64_t u1, uint64_t u0, uint64_t v, du_int* r) const {
mp_limb_t q[2] = {u0, u1};
mp_limb_t result[2] = {0, 0};
*r = mpn_divrem_1(result, 0, q, 2, v);
return result[0];
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