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ARM DSP库中__SIMD32(addr) 宏定义？

qulei

/**

* @brief definition to read/write two 16 bit values.

*/

#define __SIMD32(addr) (*(int32_t **) & (addr))

为什么不写成 #define __SIMD32(addr) (int32_t *) (addr)

有什么好处？