Re: Some more patches for GCC on NetBSD/VAX coming soon...

[Johnny Billquist <bqt%update.uu.se@localhost>]

Results from a VAX 8650 then.
Program compiled with cc -O2 -o cyclecount cyclecount.c

Krille:local/bqt# ./cyclecount
loop overhead is 0.290213 usec
elapsed time for nop: 41270288 usec
# cycles at 72 MHz: 4.127029 (17445965 ips)
elapsed time for 32-bit int multiply (2 op): 165203547 usec
# cycles at 72 MHz: 33.040709 (2179130 ips)
elapsed time for 32-bit int multiply (3 op, 1 reg): 185888344 usec
# cycles at 72 MHz: 37.177669 (1936646 ips)
elapsed time for 32-bit int multiply (3 op, 3 reg): 144865833 usec
# cycles at 72 MHz: 28.973167 (2485058 ips)
elapsed time for 16-bit int multiply (2 op): 33086337 usec
# cycles at 72 MHz: 33.086337 (2176125 ips)
elapsed time for 16-bit int multiply (3 op, 3 reg): 28985526 usec
# cycles at 72 MHz: 28.985526 (2483998 ips)
elapsed time for 8-bit int multiply (2 op): 99279460 usec
# cycles at 72 MHz: 33.093153 (2175677 ips)
elapsed time for 8-bit int multiply (3 op, 3 reg): 86891245 usec
# cycles at 72 MHz: 28.963748 (2485866 ips)
elapsed time for F_floating multiply (2 op): 67304807 usec
# cycles at 72 MHz: 13.460961 (5348801 ips)
elapsed time for F_floating multiply (3 op, 3 reg): 103582829 usec
# cycles at 72 MHz: 20.716566 (3475480 ips)
elapsed time for D_floating multiply (2 op): 144650844 usec
# cycles at 72 MHz: 28.930169 (2488751 ips)
elapsed time for D_floating multiply (3 op, 3 reg): 310407964 usec
# cycles at 72 MHz: 62.081593 (1159764 ips)
elapsed time for G_floating multiply (2 op): 268805457 usec
# cycles at 72 MHz: 53.761091 (1339259 ips)
elapsed time for G_floating multiply (3 op, 3 reg): 310712278 usec
# cycles at 72 MHz: 62.142456 (1158628 ips)
elapsed time for 32-bit int multiply-add (64-bit result): 37261313 usec
# cycles at 72 MHz: 37.261313 (1932299 ips)


Oh, and for the record:
?MCP-I-CPSRUN, CPU is still running
>>>sho clock
    FREQUENCY 72 Mhz, full rate, locked
    SYS_CLOCK running
    CPU_CLOCK running

    X1 = 40 Mhz
    X2 = 50 Mhz
    X3 = 68 Mhz
    X4 = 72 Mhz (Normal)
    X5 = 74 Mhz (High)
    X6 = 76 Mhz

	Johnny