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| author | Ken Raeburn <raeburn@mit.edu> | 2005-06-09 23:30:33 +0000 |
|---|---|---|
| committer | Ken Raeburn <raeburn@mit.edu> | 2005-06-09 23:30:33 +0000 |
| commit | b7a6c2457a56b07e6b8231b496237deae7b31b19 (patch) | |
| tree | d8911a4e52184091080144afa1ae8da244dbbcd6 /src/include/ChangeLog | |
| parent | db604cfab8e6762248bece0edba7d87d8a48338d (diff) | |
| download | krb5-b7a6c2457a56b07e6b8231b496237deae7b31b19.tar.gz krb5-b7a6c2457a56b07e6b8231b496237deae7b31b19.tar.xz krb5-b7a6c2457a56b07e6b8231b496237deae7b31b19.zip | |
Use GCC's packed-structure support to try to optimize unaligned loads and
stores of values. (E.g., on x86, gcc will emit a word load or store regardless
of alignment; on sparc or alpha, it will do aligned word accesses. The old C
code does byte operations and arithmetic, always.) Tested in crypto code on
x86, sparc, and amd64.
* k5-platform.h (load_*): Change argument type to point to const.
(K5_BE, K5_LE): New macros, defined based on architecture macros for certain
big-endian and little-endian platforms, respectively.
(PUT, GET) [__GNUC__]: New macros. Use GCC's packed-structure support to do
unaligned loads and stores.
(PUTSWAPPED, GETSWAPPED) [__GNUC__]: Similar, but invoke a SWAP<size> macro
(not defined yet) to swap the bytes of the value.
(store_*, load_*): Use these macros when using GCC, depending on endianness and
availability of the SWAP<size> macros.
git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@17232 dc483132-0cff-0310-8789-dd5450dbe970
Diffstat (limited to 'src/include/ChangeLog')
| -rw-r--r-- | src/include/ChangeLog | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/include/ChangeLog b/src/include/ChangeLog index 2551c65361..81b690cd42 100644 --- a/src/include/ChangeLog +++ b/src/include/ChangeLog @@ -1,3 +1,16 @@ +2005-06-09 Ken Raeburn <raeburn@mit.edu> + + * k5-platform.h (load_*): Change argument type to point to const. + (K5_BE, K5_LE): New macros, defined based on architecture macros + for certain big-endian and little-endian platforms, respectively. + (PUT, GET) [__GNUC__]: New macros. Use GCC's packed-structure + support to do unaligned loads and stores. + (PUTSWAPPED, GETSWAPPED) [__GNUC__]: Similar, but invoke a + SWAP<size> macro (not defined yet) to swap the bytes of the + value. + (store_*, load_*): Use these macros when using GCC, depending on + endianness and availability of the SWAP<size> macros. + 2005-06-07 Ken Raeburn <raeburn@mit.edu> * k5-platform.h (MAYBE_DEFINE_CALLINIT_FUNCTION) |