More than likely the compiler will do the three operation breakdown we had here before (2 shifts + subtraction), but let the compiler do the optimizations and make the actual operation more obvious. This actually slightly shrinks the function binary size, likely due to instruction reordering or something.
Signed-off-by: Dan McGee <[email protected]> --- 2^6 + 2^16 - 1 lib/libalpm/util.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/lib/libalpm/util.c b/lib/libalpm/util.c index fc0e056..2cce824 100644 --- a/lib/libalpm/util.c +++ b/lib/libalpm/util.c @@ -1145,7 +1145,7 @@ unsigned long _alpm_hash_sdbm(const char *str) return hash; } while((c = *str++)) { - hash = c + (hash << 6) + (hash << 16) - hash; + hash = c + hash * 65599; } return hash; -- 1.7.8.1
