tsub              913 src/dps8/dps8_math128.c     tsub   (0,      0,      0,      0,          0,       0);
tsub              914 src/dps8/dps8_math128.c     tsub   (0,      1,      0,      1,          0,       0);
tsub              915 src/dps8/dps8_math128.c     tsub   (MASK64, MASK64, MASK64, MASK64,     0,       0);
tsub              916 src/dps8/dps8_math128.c     tsub   (MASK64, MASK64, 0,      0,          MASK64,  MASK64);
tsub              917 src/dps8/dps8_math128.c     tsub   (0,      0,      0,      1,          MASK64,  MASK64);