1ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brownm_na: returned value is -1 2ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brownsum is non-positive 3ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brownm_rm: returned value is 1 4ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brownsum is non-positive 5