1solaris 2.5.1 usparc 167mhz?? - SC4.0 cc -fast -Xa -xO5
2
3For the ultra sparc, SunC 4.0 cc -fast -Xa -xO5, running 'des_opts'
4gives a speed of 475,000 des/s while 'speed' gives 417,000 des/s.
5I believe the difference is tied up in optimisation that the compiler
6is able to perform when the code is 'inlined'.  For 'speed', the DES
7routines are being linked from a library.  I'll record the higher
8speed since if performance is everything, you can always inline
9'des_enc.c'.
10
11[ 16-Jan-06 - I've been playing with the
12  '-xtarget=ultra -xarch=v8plus -Xa -xO5 -Xa'
13  and while it makes the des_opts numbers much slower, it makes the
14  actual 'speed' numbers look better which is a realistic version of
15  using the libraries. ]
16
17options    des ecb/s
1816 r1 p    475516.90 100.0%
1916 r2 p    439388.10  92.4%
2016  c i    427001.40  89.8%
2116  c p    419516.50  88.2%
22 4 r2 p    409491.70  86.1%
23 4 r1 p    404266.90  85.0%
24 4  c p    398121.00  83.7%
25 4  c i    370588.40  77.9%
26 4 r1 i    362742.20  76.3%
2716 r2 i    331275.50  69.7%
2816 r1 i    324730.60  68.3%
29 4 r2 i     63535.10  13.4%	<-- very very weird, must be cache problems.
30-DDES_UNROLL -DDES_RISC1 -DDES_PTR
31
32