if(mm_flags & MM_MMXEXT){ dct_quantize= dct_quantize_MMX2; }else{ dct_quantize= dct_quantize_MMX; }
void MPV_common_init_mmx(MpegEncContext *s){    if (mm_flags & MM_MMX) {        if (s->out_format == FMT_H263)        	s->dct_unquantize = dct_unquantize_h263_mmx;	else        	s->dct_unquantize = dct_unquantize_mpeg1_mmx;		draw_edges = draw_edges_mmx;    }}