Make generate_series() correct on ones complement ALUs and acceptable to UBSAN.

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-D 2023-05-15T02:06:35.229
+C Make\sgenerate_series()\scorrect\son\sones\scomplement\sALUs\sand\sacceptable\sto\sUBSAN.
+D 2023-05-15T03:48:48.598
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