TMS320F2812 汇编指令CMP64 ACC:P具体是啥意思 有什么作用呢？？？

The 64-bit content of the combined ACC:P registers is compared against
zero and the flags are set appropriately:
if((V = 1) & (ACC(bit 31) = 1))
N = 0;
else
N = 1;
if((V = 1) & (ACC(bit 31) = 0))
N = 1;
else
N = 0;
if(ACC:P = 0x8000 0000 0000 0000)
Z = 1;
else
Z = 0;
V = 0;
Note: This operation should be used as follows:
CMP64 ACC:P ; Clear V flag
perform 64-bit operation
CMP64 ACC:P ; Set Z,N flags, V=0
conditionally branch

liu liu10：

回复 mangui zhang:

你好！麻烦再问你一个问题哈！我现在是两块F2812通过Mcbsp进行传数，可不可以其中一块DSP的mcbsp初始化发送4个字，然后另一块DSP进入mcbsp接收中断时通过判断接收的字的个数来进入不同的处理函数？比如接收2个字进入函数1，接收4个字进入函数2.望大神指点之！！！！！