t1_               190 src/gauche/arith.h         u_long t1_, t2_, t3_, t4_;                                      \
t1_               192 src/gauche/arith.h         t1_ = xl_ * yh_;                                                \
t1_               195 src/gauche/arith.h         t3_ = t1_ + t2_;                                                \
t1_               196 src/gauche/arith.h         if (t3_ < t1_) hi += HALF_WORD;                                 \