Of course , doubleword integer instructions are not available on 32 - bit implementations , and floating - point instructions are supported only through software emulation on most embedded implementations 當(dāng)然,在32位的實(shí)現(xiàn)上還不能用雙字整數(shù)指令,在大部分嵌入式實(shí)現(xiàn)中浮點(diǎn)指令也只是通過軟件仿真提供支持。
Many embedded applications have little or no need for floating - point arithmetic , and software emulation of powerpc floating - point instruction execution is usually more than adequate when it is needed 很多嵌入式應(yīng)用程序很少或者根本不需要浮點(diǎn)算法,而當(dāng)需要的時(shí)候,對(duì)powerpc浮點(diǎn)指令執(zhí)行進(jìn)行軟件仿真就足夠了。