SSUBOV            348 ext/uvector/uvector.c     SSUBOV(r, v, x, y);
SSUBOV            432 ext/uvector/uvector.c     SSUBOV(r, v, x, y);
SSUBOV            164 src/gauche/arith.h #ifndef SSUBOV
SSUBOV            261 src/test-arith.c     TESTOV(x_, y_, rexp, cexp, "%ld", "-", SSUBOV)