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| author | Ralph Giles <giles@thaumas.net> | 2014-07-02 14:12:38 -0700 |
|---|---|---|
| committer | Erik de Castro Lopo <erikd@mega-nerd.com> | 2014-07-03 18:59:49 +1000 |
| commit | 22d4893d28a6fbcb2a2375378c487eb739f8d14c (patch) | |
| tree | ffd6b58ad7738ca98f4b2e7d09648976b9ee6853 /include/share | |
| parent | 7422e084f43cc160598dc8a5f1a2bbd2063b8bbb (diff) | |
| download | flac-22d4893d28a6fbcb2a2375378c487eb739f8d14c.tar.gz | |
Fix bswap16 issue on Debian 6.
Versions of GCC prior to 4.8 didn't provide an implementation
of __builtin_bswap16 on x86_64. Detect those versions and
supply a fallback implementation. A cleaner fix would be
to detect bswap16 independently of bswap32 in configure
and handle them separately.
See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52624
Signed-off-by: Erik de Castro Lopo <erikd@mega-nerd.com>
Diffstat (limited to 'include/share')
| -rw-r--r-- | include/share/endswap.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/share/endswap.h b/include/share/endswap.h index 058fe0b7..9a5d86fa 100644 --- a/include/share/endswap.h +++ b/include/share/endswap.h @@ -33,6 +33,14 @@ #if HAVE_BSWAP32 /* GCC and Clang */ +/* GCC prior to 4.8 didn't provide bswap16 on x86_64 */ +#if __GNUC__ <= 4 && __GNUC_MINOR__ < 8 +static inline unsigned short __builtin_bswap16(unsigned short a) +{ + return (a<<8)|(a>>8); +} +#endif + #define ENDSWAP_16(x) (__builtin_bswap16 (x)) #define ENDSWAP_32(x) (__builtin_bswap32 (x)) |