匹配字边界稍有不同，但向正则表达式添加了很重要的能力。
They also enable you to create expressions that match the start, end, or interior of a word.
注意所有声明的变量（使用DMA复制的）都是按四字边界对齐的且都是四字的整数倍。
Note that all of the declared variables which will be copied using DMA are aligned on quadword boundaries and are multiples of quadwords.
因此指定一个- m 128bit -long -double会将“long double”按照16字节边界进行对齐，它会为“longdouble”填充32位的0。
So specifying a -m128bit-long-double will align "long double" to a 16-byte boundary by padding the "long double" with an additional 32-bit zero.
记住，lqd指令只能从16字节边界加载，所以它会在加载期间忽略最低有效的四位，而只会从内存加载已对齐的四字。
Remember, the LQD instruction only loads from 16-byte boundaries. It will therefore ignore the four least significant bits during the load, and just load an aligned quadword from memory.
因为所有对象都是从8字节边界开始，并且大小可以被8整除，所以底部的3位不用于表示大小；我们将其作为标志，用于表示对象的不同状态。
As all objects start on an 8 byte boundary, and the size is divisible by 8, the bottom 3 bits are not used for the size; we use them for flags to indicate different states of the object.
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.
存储这样的值则更为困难，所以如果可能，最好永远不要使用跨16字节边界的值。
Storing such values is even more difficult, so it is best to never use values that cross 16-byte boundaries.
优化的传输是128的整数倍，它们都在128字节边界上对齐。
Optimal transfers are multiples of 128 bytes that are on 128-byte boundaries.
通过保持数据对齐并针对16字节边界进行填充，向量操作就可以毫不费力地执行了。
By keeping the data aligned and padded to 16-byte boundaries, vector operations can be performed effortlessly.
记住，传输16字节或更多字节的dma在spe和PPE上必须是16字节的整数倍，并按照16字节边界进行对齐。
Remember that DMA transfers of 16 bytes or more must be in 16-byte multiples and aligned to 16-byte boundaries on both the SPE and the PPE.
因此，如果一个分区起始于一个4096字节(8个扇区)边界，则表示它得到合理对齐。
Thus, if a partition begins on a 4096-byte (8-sector) boundary, it's properly aligned.
这十分关键，因为SPU一次只能加载16字节，并对齐到16字节的边界。
This is critical, as the SPU can only load exactly 16 bytes at a time, aligned to exactly a 16-byte boundary.
请注意，mptr是按8字节边界划分颗粒度的，而这一位置不是。
Note that the MPTR, not this slot, is grained on an 8 byte boundary. The flags are as follows.
但是，由于我们用一个字的边界，它不匹配。
But because we have used a word boundary, it does not match.
基于十字链表，提出了一种图像符号表达新方法，统一了区域和边界的表达与描述。
A new image sign expression based on across linker is proposed in this paper which includes expressions and descriptions of area and boundary.
首先在图像的边界对准十字线旋转眼杯。
First focus the reticle with the image field boundary by turning the eyecup.
首先在图像的边界对准十字线旋转眼杯。
First focus the reticle with the image field boundary by turning the eyecup.
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