field *ff;
mp *xx, *yy;
- if (z != Py_None || !FE_PYCHECK(x) || (yy = implicitmp(y)) == 0)
+ if (z != Py_None || !FE_PYCHECK(x)) RETURN_NOTIMPL;
+ if (FE_PYCHECK(y) && FE_F(y)->ops->ty == FTY_PRIME)
+ yy = F_OUT(FE_F(y), MP_NEW, FE_X(y));
+ else if ((yy = implicitmp(y)) == 0)
RETURN_NOTIMPL;
ff = FE_F(x); xx = FE_X(x); MP_COPY(xx);
if (MP_NEGP(yy) && F_ZEROP(ff, xx)) ZDIVERR("division by zero");