Now, the integer multiply instructions on the SPU are somewhat problematic, especially signed multiplication (using the mpy instruction).

现在，SPU上的整数相乘指令多少有点问题，特别是有符号乘法(使用mpy指令)。

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When the original image point multiply the transformation matrix, a new image position, the position may not integer, this position gray value by gray interpolation gain needed.

当原始图像点乘以变换矩阵，得到新的图像位置点时，其位置可能不是整数值，该位置的灰度值需要通过灰度插值获得。

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Now we can multiply frequencies by integer values. But how can we multiply our frequency by fractional values or divide it?

现在我们可以倍增整数频率，但是我们如何以分数倍增频率，或者分频呢？

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