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| author | Paul Eggert <eggert@cs.ucla.edu> | 2013-10-04 00:36:22 -0700 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2013-10-04 00:36:22 -0700 |
| commit | 4eed3157327f8406921658442a11af7e9d84d603 (patch) | |
| tree | e727a3017628ce840707d71998d4f6423a8fbde3 /src/ChangeLog | |
| parent | 157fec2e190a84345138a0cc69e35f177c4d4a56 (diff) | |
| download | emacs-4eed3157327f8406921658442a11af7e9d84d603.tar.gz | |
Use hardware support for byteswapping on glibc x86 etc.
On Fedora 19 x86-64, the new bswap_64 needs 1 instruction,
whereas the old swap64 needed 30.
* admin/merge-gnulib (GNULIB_MODULES): Add byteswap.
* lib/byteswap.in.h, m4/byteswap.m4: New files, copied from Gnulib.
* lib/gnulib.mk, m4/gnulib-comp.m4: Regenerate.
* src/fringe.c (init_fringe_bitmap) [WORDS_BIGENDIAN]:
* src/sound.c (le2hl, le2hs, be2hl) [!WINDOWSNT]:
Use byteswap.h's macros to swap bytes.
* src/lisp.h (swap16, swap32, swap64): Remove.
All uses replaced by bswap_16, bswap_32, bswap_64.
Diffstat (limited to 'src/ChangeLog')
| -rw-r--r-- | src/ChangeLog | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/ChangeLog b/src/ChangeLog index 4fae03d6965..38fb35ddf54 100644 --- a/src/ChangeLog +++ b/src/ChangeLog @@ -1,5 +1,14 @@ 2013-10-04 Paul Eggert <eggert@cs.ucla.edu> + Use hardware support for byteswapping on glibc x86 etc. + On Fedora 19 x86-64, the new bswap_64 needs 1 instruction, + whereas the old swap64 needed 30. + * fringe.c (init_fringe_bitmap) [WORDS_BIGENDIAN]: + * sound.c (le2hl, le2hs, be2hl) [!WINDOWSNT]: + Use byteswap.h's macros to swap bytes. + * lisp.h (swap16, swap32, swap64): Remove. + All uses replaced by bswap_16, bswap_32, bswap_64. + * bytecode.c (exec_byte_code): Use some more volatile variables to work around local variables getting clobbered by longjmp. Port to pre-C99, which doesn't allow decls after stmts. |