xh_               189 src/gauche/arith.h         u_long xl_ = LO(x), xh_ = HI(x), yl_ = LO(y), yh_ = HI(y);      \
xh_               193 src/gauche/arith.h         t2_ = xh_ * yl_;                                                \
xh_               194 src/gauche/arith.h         hi = xh_ * yh_;                                                 \