hi all:

2011/1/8 loody <milo...@gmail.com>:
> Hi all:
> I remember there is an instruction called COP which can used for
> taking look at coprocessor registers.
> But I cannot find out the usage.
> From the help message, if I want to take a look at coprocessor 13
> select 0, it should use "cop cp 13 0",
> but I always get error message as below:
>
>> help cop
> cop cp index select [value]
>      Set or display 32-bit co-processor register values
>  mips1.cpu cop cp index select [value]
>        Set or display 32-bit co-processor register values
>> cop cp 13 0
> Invalid command argument
> cp option value ('cp') is not valid
> Command handler execution failed
> in procedure 'cop' called at file "command.c", line 650
> called at file "command.c", line 361
>> cop cp 9 0
> Invalid command argument
> cp option value ('cp') is not valid
> Command handler execution failed
> in procedure 'cop' called at file "command.c", line 650
> called at file "command.c", line 361
>>
I found out the correct usage:
cop 0 12 0
the first 0 means co-processor 0.
Regards,
miloody
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