要加载跨越16字节边界的值会十分困难，因为必须要将其存储到两个寄存器，进行移位然后再对它们进行掩码和组合。

To load a value which crosses a 16-byte boundary is even more difficult, as you would actually have to load it into two registers, shift them, and then mask and combine them.

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通过将它对齐到16位边界，就可以确保它将会被加载进寄存器的前四个字节。

By aligning it to a 16-byte boundary, you know that it will load into the first four bytes of the register.

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跨越函数边界优化寄存器的使用。

Optimize the use of registers across function boundaries.

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跨越函数边界优化寄存器的使用。

Optimize the use of registers across function boundaries.

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