diff options
| author | lloyd <[email protected]> | 2011-05-12 17:56:08 +0000 |
|---|---|---|
| committer | lloyd <[email protected]> | 2011-05-12 17:56:08 +0000 |
| commit | ae7868f4985ce52cefeb5864715b53ecee78f740 (patch) | |
| tree | fb33fad8be4cbc98be6ad604249aada897f345f1 /doc | |
| parent | 44aa55d0aeb96d452450df5c024db7275a560925 (diff) | |
Fix the problem that prevented the SSE2 IDEA implementation from
working correctly under Clang - the technique for emulating unsigned
compare relied on signed overflow. The new method does not, and works
under GCC, ICC, and Clang. Even better, the compare takes only 2
instructions instead of 4.
Prevent using any of the asm implementations under Clang on x86-32.
All of them crash under Clang 2.9, unclear why.
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/log.txt | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/doc/log.txt b/doc/log.txt index 988e4d71d..012a37041 100644 --- a/doc/log.txt +++ b/doc/log.txt @@ -15,6 +15,12 @@ Version 1.9.18, Not Yet Released * Add support for compiling SSL using Visual C++ 2010's TR1 implementation. +* The SSE2 implementation of IDEA did not work correctly when compiled + by Clang, because the trick it used to emulate a 16 bit unsigned + compare in SSE (which doesn't contain one natively) relied on signed + overflow working in the 'usual' way. A different method that doesn't + rely on signed overflow is now used. + * Fix a bug under Visual C++ 2010 which would cause ``hex_encode`` to crash if given a zero-sized input to encode. |