================
@@ -432,4 +432,138 @@ MPInt IntMatrix::normalizeRow(unsigned row, unsigned
cols) {
MPInt IntMatrix::normalizeRow(unsigned row) {
return normalizeRow(row, getNumColumns());
+}
+
+MPInt IntMatrix::determinant() {
+ unsigned r = getNumRows();
+ unsigned c = getNumColumns();
+ assert(r == c);
+
+ FracMatrix m(r, c);
+ for (unsigned i = 0; i < r; i++)
+ for (unsigned j = 0; j < c; j++)
+ m.at(i, j) = Fraction(at(i, j), 1);
+
+ Fraction det = m.determinant();
+
+ return det.getAsInteger();
+}
+
+std::optional<IntMatrix> IntMatrix::integerInverse() {
+ Fraction det = Fraction(determinant(), 1);
+ FracMatrix newMat(getNumRows(), getNumColumns());
+ for (unsigned i = 0; i < getNumRows(); i++)
+ for (unsigned j = 0; j < getNumColumns(); j++)
+ newMat(i, j) = Fraction(at(i, j), 1);
----------------
Abhinav271828 wrote:
it doesn't work, we don't have a cast from IntMatrix to FracMatrix. shall I
write one?
https://github.com/llvm/llvm-project/pull/67382
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