TESTCHK, CHKSUM.C, and CHKSUM_M.MAR

CHKSUM.C is the original checksum routine from gnuucp.  CHKSUM_M.MAR 
is a hand recoding of the routine in Macro.  TESTCHK invokes each
one thousand times and reports the elapsed and CPU times.  

On an 8200, the Macro version runs in about half the time as the C:

 ELAPSED:    0 00:00:00.13  CPU: 0:00:00.13  BUFIO: 0  DIRIO: 0  FAULTS: 1 
Prev was for C version, result was 0x cee
 ELAPSED:    0 00:00:00.07  CPU: 0:00:00.06  BUFIO: 0  DIRIO: 0  FAULTS: 1 
 ... for macro version, result was 0x cee

Similar on a uV3600:

 ELAPSED:    0 00:00:00.05  CPU: 0:00:00.05  BUFIO: 0  DIRIO: 0  FAULTS: 1 
Prev was for C version, result was 0x cee
 ELAPSED:    0 00:00:00.02  CPU: 0:00:00.02  BUFIO: 0  DIRIO: 0  FAULTS: 1 
 ... for macro version, result was 0x cee

Results on the 3600 were the same for V2.x and V3.0 of VAX C.

Conclusion:  We could probably shave quite a bit off of the user-mode time
by recoding most of giowmvs.c (getdata, putdata, and everything beneath
them) in Macro.  We will likely do this as a warmup for what is REALLY
the Right Thing -- implement the windowed g protocol, along with QIO 
support for the "xgetc" function needed by the script processor, in a 
terminal class driver.  

	--- Jamie Hanrahan 11-Apr-1989