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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-04-28 03:50:42 +0300 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-14 01:21:49 +0300 |
| commit | 0875b2651dad34ed30e17ce12c2334ee64c7cd23 (patch) | |
| tree | 487d6f473901c6378416353ec9cab6131f8989df /doc/developer.texi | |
| parent | 681ca7ecd08a28e0fd87b6d0e882eb078f0441c7 (diff) | |
doc/developer: Add terse documentation of assumed C implementation defined behavior
Suggested-by: "Ronald S. Bultje" <rsbultje@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit b706ddbae3f4a11c58560b914807931556108b55)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'doc/developer.texi')
| -rw-r--r-- | doc/developer.texi | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/doc/developer.texi b/doc/developer.texi index dbe1f5421f..98540c8f99 100644 --- a/doc/developer.texi +++ b/doc/developer.texi @@ -131,6 +131,11 @@ designated struct initializers (@samp{struct s x = @{ .i = 17 @};}); @item compound literals (@samp{x = (struct s) @{ 17, 23 @};}). + +@item +Implementation defined behavior for signed integers is assumed to match the +expected behavior for two's complement. Non representable values in integer +casts are binary truncated. Shift right of signed values uses sign extension. @end itemize These features are supported by all compilers we care about, so we will not |