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Fix basicstuff_8 casting test failure on loongarch64

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libeigen/eigen!2379

Co-authored-by: Rasmus Munk Larsen <rmlarsen@gmail.com>
This commit is contained in:
Rasmus Munk Larsen
2026-04-02 14:14:54 -07:00
parent 61a8662876
commit 8ec68856a6
1 changed files with 6 additions and 1 deletions
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7
test/basicstuff.cpp
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@@ -207,7 +207,12 @@ struct casting_test {
Matrix<TgtScalar, 4, 4> n = m.template cast<TgtScalar>();
for (int i = 0; i < m.rows(); ++i) {
for (int j = 0; j < m.cols(); ++j) {
VERIFY_IS_APPROX(n(i, j), (internal::cast<SrcScalar, TgtScalar>(m(i, j))));
// Materialize both values to avoid GCC miscompilation at -O3 on some targets
// (e.g., loongarch64) where the compiler may keep intermediate results in wider
// FP registers, causing the comparison to see different precision than intended.
TgtScalar actual = n(i, j);
TgtScalar expected = internal::cast<SrcScalar, TgtScalar>(m(i, j));
VERIFY_IS_APPROX(actual, expected);
}
}
}