From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: virtio-return-2968-cohuck=redhat.com@lists.oasis-open.org Sender: List-Post: List-Help: List-Unsubscribe: List-Subscribe: Date: Tue, 6 Mar 2018 16:35:46 +0200 From: "Michael S. Tsirkin" Message-ID: <1520346937-7968-1-git-send-email-mst@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Subject: [virtio] [PATCH] introduction: add note on bitfield portability To: virtio@lists.oasis-open.org, virtio-dev@lists.oasis-open.org Cc: Cornelia Huck List-ID: Signed-off-by: Michael S. Tsirkin --- introduction.tex | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/introduction.tex b/introduction.tex index d0b770e..18ad76e 100644 --- a/introduction.tex +++ b/introduction.tex @@ -175,5 +175,12 @@ packed by C compilers on little-endian architectures but not the way bitfields are packed by C compilers on big-endian architectures. +Assuming that CPU_TO_BE16 converts a 16-bit integer from a native +CPU to the big-endian byte order, the following is the equivalent +portable C code to generate a value in this format: +\begin{lstlisting} +CPU_TO_BE16(B << 15 | A) +\end{lstlisting} + \newpage -- MST --------------------------------------------------------------------- To unsubscribe from this mail list, you must leave the OASIS TC that generates this mail. Follow this link to all your TCs in OASIS at: https://www.oasis-open.org/apps/org/workgroup/portal/my_workgroups.php