xsign            1155 src/bignum.c       int xsize = SCM_BIGNUM_SIZE(x), xsign = SCM_BIGNUM_SIGN(x);
xsign            1160 src/bignum.c       if (xsign > 0) {
xsign            1206 src/bignum.c       int xsize = SCM_BIGNUM_SIZE(x), xsign = SCM_BIGNUM_SIGN(x);
xsign            1211 src/bignum.c       if (xsign >= 0) {