RFR: 8272541: Incorrect overflow test in Toom-Cook branch of BigInteger multiplication

[Joe Darcy]

On Mon, 16 Aug 2021 21:00:00 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

> Please consider this change which would modify a conditional `a + b > c` where the left side variables are `int`s and the right side is `(long)Integer.MAX_VALUE + 1`. The change is to cast the left side variables to `long`s.

Marked as reviewed by darcy (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/5130