From: "Michael S. Tsirkin" <mst@redhat.com>
To: virtio@lists.oasis-open.org, virtio-dev@lists.oasis-open.org
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Subject: [virtio] [PATCH] introduction: add note on bitfield portability
Date: Tue, 6 Mar 2018 16:35:46 +0200 [thread overview]
Message-ID: <1520346937-7968-1-git-send-email-mst@redhat.com> (raw)
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
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
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next reply other threads:[~2018-03-06 14:35 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-06 14:35 Michael S. Tsirkin [this message]
2018-03-06 14:44 ` [virtio] [PATCH] introduction: add note on bitfield portability Cornelia Huck
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