[PATCH v1] x86: memcmp-avx2-movbe.S and memcmp-evex-movbe.S fix overflow bug.

[Andreas Schwab]

On Jun 09 2021, Siddhesh Poyarekar wrote:

> On 6/9/21 12:02 PM, Noah Goldstein wrote:
>> Wait are you saying that the return value overflowing causes UB or
>> that the act of passing a maxlen where s + maxlen * sizeof(wchar_t) is
>> outside range object is UB?
>
> Not specifically the return value, but more broadly, causing wcsnlen to
> invoke undefined behaviour, which could include the former.

I don't think wcsnlen can assume that such an overflow doesn't happen.

Andreas.

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Andreas Schwab, schwab@linux-m68k.org
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