[Python-Dev] Drop support for ones' complement machines? (original) (raw)

Alexander Belopolsky alexander.belopolsky at gmail.com
Tue Dec 1 17:47:45 CET 2009

On Tue, Dec 1, 2009 at 11:24 AM, Mark Dickinson <dickinsm at gmail.com> wrote:

On Tue, Dec 1, 2009 at 4:17 PM, James Y Knight <foom at fuhm.net> wrote:

I think all that needs to be defined is that conversion from unsigned to signed, and (negative) signed to unsigned integers have 2's complement wrapping semantics, and does not affect the bit pattern in memory.

I don't know if this particular implementation defined behavior is safe to be relied upon. I just want to suggest that if any such assumption is made in the code, a test should be added to configure to complain loudly if a platform violating the assumption is found in the future.

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