opcode not supported on this processor

[ym.uestc at gmail.com (mao ye)]

I compile the rtems.But I meet a trouble:
in the cpu_asm.s
other code can be compilede,but there are some errors:
opcode not supported on this processor:mips1(mips1) 'dmfc0 $8,$14'
opcode not supported on this processor:mips1(mips1) 'dadd $5,$4,$0'
opcode not supported on this processor:mips1(mips1) 'dsll $9,$9,2'
opcode not supported on this processor:mips1(mips1) 'eret'

why?

Thanks.
                     ye mao
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://rtems.rtems.org/pipermail/rtems-users/attachments/20070618/b137360c/attachment.html