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双精度浮点数加法函数__aeabi_dadd的执行cycles?



如果没有VFP支持的话,编译器遇到浮点数运算会编成调用相对应的库函数,下面是一个双精度浮点数加法库函数(汇编语言的)

BL __aeabi_dadd

请问__aeabi_dadd函数所需的Cycle是多少(可无视平台,大概即可)?我查了很多文档,都没有记载其内部实现的细节。