Solaris 2.4, 486 50mhz, gcc 2.6.3
options    des ecb/s
16 r2 i     43552.51 100.0%
16 r1 i     43487.45  99.9%
16  c p     43003.23  98.7%
16 r2 p     42339.00  97.2%
16  c i     41900.91  96.2%
16 r1 p     41360.64  95.0%
 4  c i     38728.48  88.9%
 4  c p     38225.63  87.8%
 4 r1 i     38085.79  87.4%
 4 r2 i     37825.64  86.9%
 4 r2 p     34611.00  79.5%
 4 r1 p     31802.00  73.0%
-DDES_UNROLL -DDES_RISC2