Function: absdiff	absdiff(0,   +1)	CPT = 10.92
Function: absdiff	absdiff(0,   -1)	CPT = 14.80
Function: absdiff	absdiff(0, a+-1)	CPT = 11.95
Function: absdiff	absdiff(0, r+-1)	CPT = 31.74