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| author | Paul Eggert <eggert@cs.ucla.edu> | 2004-07-29 17:33:38 +0000 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2004-07-29 17:33:38 +0000 |
| commit | 3a7060d519a3c7600f81cd5b874a2a7486e30caf (patch) | |
| tree | 98fb09d41204f05f64ecc2c1a9e32452bcdaa386 /lib/memchr.c | |
| parent | 0bdefc2dcac212da26e27a06eb45e73f005fa82a (diff) | |
| download | coreutils-3a7060d519a3c7600f81cd5b874a2a7486e30caf.tar.xz | |
(UNALIGNED_P): Use sizeof, not alignof.
Diffstat (limited to 'lib/memchr.c')
| -rw-r--r-- | lib/memchr.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/memchr.c b/lib/memchr.c index 4cb1a8b51..2b2932fb1 100644 --- a/lib/memchr.c +++ b/lib/memchr.c @@ -48,9 +48,11 @@ USA. */ # include <stdint.h> #endif -#define alignof(type) offsetof (struct { char c; type x; }, x) +/* Use sizeof, not alignof, for better performance on some hosts. For + example, on m68k-linux alignof (type) will always be at most 2, but + you get better performance with a 4-byte aligned pointer. */ #ifdef UINTPTR_MAX -# define UNALIGNED_P(p) (((uintptr_t) p) % alignof (unsigned long int) != 0) +# define UNALIGNED_P(p) (((uintptr_t) p) % sizeof (unsigned long int) != 0) #else # define UNALIGNED_P(p) 1 #endif |