Dear Torbjörn,
> What do you think about this stopgap change?
I would entirely drop all the squaring-related stuff from mpn_mul:
the user/developer should call mpn_sqr instead (see my previous mail).
Then the code would become:
if (BELOW_THRESHOLD (vn, MUL_TOOM22_THRESHOLD))
{
mpn_mul_basecase (prodp, up, un, vp, vn);
return prodp[un + vn - 1]; /* historic */
}
if (un == vn)
return mpn_mul_n (prodp, up, vp, un);
...
(I believe it is vn and not un that should be compared to MUL_TOOM22_THRESHOLD.)
Paul
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