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fe51b33859
On so-far-only-theoretical platforms with 128-bit uintmax_t, 'factor' would misbehave by not factoring enough. Work around the bug (at a performance cost) and document the issue. I hope someone with more time and expertise can fix the performance cost that this introduces. To reproduce the correctness bug, build with 'gcc -DUSE_INT128 -DEXHIBIT_INT128_BUG'; 'make check' should fail due to the new test case. * src/factor.c (USE_INT128): New macro. (wide_uint, wide_int, W_TYPE_SIZE, WIDE_UINT_MAX): Define to proper values if USE_INT128. (prime_p) [!EXHIBIT_INT128_BUG]: Work around bug with 128-bit wide_uint, at some performance cost. * tests/factor/factor.pl (bug-with-128-bit-uintmax_t): New test.