在这个乘法器中，采用了修正过的4基数展位编码算法来将部分乘积减少到一半。

In this multiplier, modified radix 4 booth encoding algorithm is used to reduce the number of partial products by half.

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乘积低半部分的低半部分是val1_lo乘以val2_lo，其结果是mult1。

The lower part of the lower half of the product is val1_lo multiplied by val2_lo, which is called mult1.

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高半部分称为half2，它是val1_h1和val2_hi的乘积加上mult2的溢出位的和。

The high half, called half2, is the result of multiplying val1_h1 and val2_hi, to which any overflow from mult2 must be added.

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