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From: "colomar.6.4.3 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/102989] New: Add Clang's _ExtInt(N)
Date: Thu, 28 Oct 2021 17:41:44 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102989

            Bug ID: 102989
           Summary: Add Clang's _ExtInt(N)
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: colomar.6.4.3 at gmail dot com
  Target Milestone: ---

I'd like to see Clang's _ExtInt(N) arbitrary-precision fixed-width integers
(https://clang.llvm.org/docs/LanguageExtensions.html#extended-integer-types=
) in
GCC.

I have in mind at least a scenario where they would help:

- Bignum

They are much simpler than using GMP.  I have a project of mine where I end=
ed
up doing my own type made of an array: 'typedef uint64_t uint512_a[8];'.=20
Having the ability to handle 'typedef unsigned _ExtInt(512) uint512;' as ea=
sily
as __int128 is great.=