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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-07-03 09:15:21 -07:00
parent 674e030456
commit c3ac079272
4 changed files with 37 additions and 23 deletions
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36
src/math/interval/mod_interval_def.h
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@ -124,35 +124,37 @@ Numeral mod_interval<Numeral>::closest_value(Numeral const& n) const {
// TBD: correctness and completeness for wrap-around semantics needs to be checked/fixed
template<typename Numeral>
void mod_interval<Numeral>::intersect_ule(Numeral const& h) {
mod_interval<Numeral>& mod_interval<Numeral>::intersect_ule(Numeral const& h) {
if (is_empty())
return;
return *this;
if (is_max(h))
return;
return *this;
else if (is_free())
lo = 0, hi = h + 1;
else if (hi > lo && lo > h)
set_empty();
else if (hi != 0 || h + 1 < hi)
hi = h + 1;
hi = h + 1;
return *this;
}
template<typename Numeral>
void mod_interval<Numeral>::intersect_uge(Numeral const& l) {
mod_interval<Numeral>& mod_interval<Numeral>::intersect_uge(Numeral const& l) {
if (is_empty())
return;
return *this;
if (lo < hi && hi <= l)
set_empty();
else if (is_free())
lo = l, hi = 0;
else if (lo < hi && lo < l)
lo = l;
lo = l;
return *this;
}
template<typename Numeral>
void mod_interval<Numeral>::intersect_ult(Numeral const& h) {
mod_interval<Numeral>& mod_interval<Numeral>::intersect_ult(Numeral const& h) {
if (is_empty())
return;
return *this;
if (h == 0)
set_empty();
else if (is_free())
@ -161,12 +163,13 @@ void mod_interval<Numeral>::intersect_ult(Numeral const& h) {
set_empty();
else if (hi > lo && h < hi)
hi = h;
return *this;
}
template<typename Numeral>
void mod_interval<Numeral>::intersect_ugt(Numeral const& l) {
mod_interval<Numeral>& mod_interval<Numeral>::intersect_ugt(Numeral const& l) {
if (is_empty())
return;
return *this;
if (is_max(l))
set_empty();
else if (is_free())
@ -177,24 +180,26 @@ void mod_interval<Numeral>::intersect_ugt(Numeral const& l) {
set_empty();
else if (lo < hi)
lo = l + 1;
return *this;
}
template<typename Numeral>
void mod_interval<Numeral>::intersect_fixed(Numeral const& a) {
mod_interval<Numeral>& mod_interval<Numeral>::intersect_fixed(Numeral const& a) {
if (is_empty())
return;
return *this;
if (!contains(a))
set_empty();
else if (is_max(a))
lo = a, hi = 0;
else
lo = a, hi = a + 1;
return *this;
}
template<typename Numeral>
void mod_interval<Numeral>::intersect_diff(Numeral const& a) {
mod_interval<Numeral>& mod_interval<Numeral>::intersect_diff(Numeral const& a) {
if (!contains(a) || is_empty())
return;
return *this;
if (a == lo && a + 1 == hi)
set_empty();
else if (a == lo && hi == 0 && is_max(a))
@ -205,4 +210,5 @@ void mod_interval<Numeral>::intersect_diff(Numeral const& a) {
hi = a;
else if (hi == 0 && is_max(a))
hi = a;
return *this;
}