[XviD-devel]The -asm option

[xjb]

xvid-develwhen I enable the -asm option for encoding,the encoded bitstream is different from the encoded bitstream without -asm option.Doesn's the -asm option just do some optimization for certain platform and keep the algorithm unchanged?why could this happen?

Maybe I do not understand those option correctly,please give me some advise and the related thread or document that discripting those option.