From: Yury Norov <yury.norov@gmail.com>
To: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Cc: "Alexandre Courbot" <acourbot@nvidia.com>,
"Alice Ryhl" <aliceryhl@google.com>,
"Danilo Krummrich" <dakr@kernel.org>,
"Miguel Ojeda" <ojeda@kernel.org>,
"Joel Fernandes" <joelagnelf@nvidia.com>,
"Jesung Yang" <y.j3ms.n@gmail.com>,
"Boqun Feng" <boqun.feng@gmail.com>,
"Gary Guo" <gary@garyguo.net>,
"Björn Roy Baron" <bjorn3_gh@protonmail.com>,
"Benno Lossin" <lossin@kernel.org>,
"Andreas Hindborg" <a.hindborg@kernel.org>,
"Trevor Gross" <tmgross@umich.edu>,
linux-kernel@vger.kernel.org, rust-for-linux@vger.kernel.org
Subject: Re: [PATCH 1/2] rust: add BitInt integer wrapping type
Date: Mon, 3 Nov 2025 09:26:03 -0500 [thread overview]
Message-ID: <aQi7e6VgFsqpq1Rn@yury> (raw)
In-Reply-To: <CANiq72mg-NntJLf_jbigz++0hK7G3WAxbvejRq1EzOc7GE+doA@mail.gmail.com>
On Mon, Nov 03, 2025 at 03:10:01PM +0100, Miguel Ojeda wrote:
> On Mon, Nov 3, 2025 at 3:17 AM Yury Norov <yury.norov@gmail.com> wrote:
> >
> > Rust _must_ do the same thing to at least be arithmetically
> > compatible to the big brother.
>
> No, Rust doesn't need to do anything of the sort, sorry.
>
> The point here is not to copy what C does, but to improve on it.
>
> In particular, we definitely do not want to have anything like integer
> promotions and arithmetic conversions from C.
This is exactly what the patch does:
+/// let v = BitInt::<u8, 4>::from_expr(15);
+///
+/// // Common operations are supported against the backing type.
+/// assert_eq!(v + 5, 20);
+/// assert_eq!(v / 3, 5);
next prev parent reply other threads:[~2025-11-03 14:26 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-31 13:39 [PATCH 0/2] rust: add BitInt type and use in Nova's bitfield macro Alexandre Courbot
2025-10-31 13:39 ` [PATCH 1/2] rust: add BitInt integer wrapping type Alexandre Courbot
2025-11-02 5:46 ` Alexandre Courbot
2025-11-03 2:17 ` Yury Norov
2025-11-03 10:47 ` Alice Ryhl
2025-11-03 14:31 ` Alexandre Courbot
2025-11-03 13:42 ` Alexandre Courbot
2025-11-03 13:57 ` Alexandre Courbot
2025-11-03 14:01 ` Danilo Krummrich
2025-11-03 19:36 ` Yury Norov
2025-11-04 3:13 ` Alexandre Courbot
2025-11-04 19:30 ` Yury Norov
2025-11-04 20:21 ` Danilo Krummrich
2025-11-05 14:03 ` Alexandre Courbot
2025-11-05 15:45 ` Yury Norov
2025-11-03 14:10 ` Miguel Ojeda
2025-11-03 14:26 ` Yury Norov [this message]
2025-11-03 14:44 ` Alexandre Courbot
2025-11-03 14:54 ` Miguel Ojeda
2025-11-03 19:43 ` Yury Norov
2025-11-03 20:00 ` Yury Norov
2025-10-31 13:39 ` [PATCH FOR REFERENCE 2/2] gpu: nova-core: use BitInt for bitfields Alexandre Courbot
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