[openrisc] about mips of or1200

["zhustudio" <zhustudio@ict.ac.cn>]

hi,

i have found that the mips of or1200 is to low.
Assuming the ording instructions, the or1200's mips is 2 times slow to
the system clock. (WISHBONE bus run 2_divide sys_clk)
And with cache, the simulation tell me that it is only 8-10 times slow
to system clock. 
I have run the test under orp_soc/sw. so i think the buttleneck of it is the width of WISHBONE bus.
dose anyone try to enchance the performance?

Jiahui Zhu

Email: zhustudio@ict.ac.cn
Date: 2003-06-18



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