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efficient sort of root functions

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2026-01-12 01:29:50 -10:00
parent be3044c3f9
commit 3c2e69ace2
1 changed files with 7 additions and 25 deletions
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32
src/nlsat/levelwise.cpp
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@ -511,28 +511,13 @@ namespace nlsat {
// low-degree defining polynomials as interval boundaries:
// - lower bound comes from the last element in the <= partition, so sort ties by degree descending
// - upper bound comes from the first element in the > partition, so sort ties by degree ascending
auto cmp_value = [&](root_function const& a, root_function const& b) {
auto r = m_am.compare(a.val, b.val);
if (r)
return r == sign_neg;
if (a.ire.p == b.ire.p)
return a.ire.i < b.ire.i;
return false;
};
auto tie_id = [&](root_function const& a, root_function const& b) {
unsigned ida = m_pm.id(a.ire.p);
unsigned idb = m_pm.id(b.ire.p);
if (ida != idb)
return ida < idb;
return a.ire.i < b.ire.i;
return m_pm.id(a.ire.p) < m_pm.id(b.ire.p);
};
auto cmp_lo = [&](root_function const& a, root_function const& b) {
if (cmp_value(a, b))
return true;
if (cmp_value(b, a))
return false;
if (a.ire.p == b.ire.p)
return a.ire.i < b.ire.i;
if (a.ire.p == b.ire.p) return a.ire.i < b.ire.i;
auto r = m_am.compare(a.val, b.val);
if (r) return r == sign_neg;
unsigned dega = m_pm.degree(a.ire.p, level);
unsigned degb = m_pm.degree(b.ire.p, level);
if (dega != degb)
@ -540,12 +525,9 @@ namespace nlsat {
return tie_id(a, b);
};
auto cmp_hi = [&](root_function const& a, root_function const& b) {
if (cmp_value(a, b))
return true;
if (cmp_value(b, a))
return false;
if (a.ire.p == b.ire.p)
return a.ire.i < b.ire.i;
if (a.ire.p == b.ire.p) return a.ire.i < b.ire.i;
auto r = m_am.compare(a.val, b.val);
if (r) return r == sign_neg;
unsigned dega = m_pm.degree(a.ire.p, level);
unsigned degb = m_pm.degree(b.ire.p, level);
if (dega != degb)