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| author | Roland McGrath <roland@gnu.org> | 1995-04-14 01:13:53 +0000 |
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| committer | Roland McGrath <roland@gnu.org> | 1995-04-14 01:13:53 +0000 |
| commit | 6e33fad374814f1a4bf80aa37d4ded9c9096edab (patch) | |
| tree | 28ea2008d8c3669a66dd23287cd94d7e9b815b96 | |
| parent | 6432a7793f6be8d3b6840e47e752103beaca70c9 (diff) | |
| download | glibc-6e33fad374814f1a4bf80aa37d4ded9c9096edab.tar.gz glibc-6e33fad374814f1a4bf80aa37d4ded9c9096edab.tar.xz glibc-6e33fad374814f1a4bf80aa37d4ded9c9096edab.zip | |
Thu Apr 13 09:45:01 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
* elf/libelf.h (elf_hash): Use XOR instead of ANDN when the bits being cleared are already known to be set. Thanks Ulrich.
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | elf/libelf.h | 8 |
2 files changed, 11 insertions, 2 deletions
diff --git a/ChangeLog b/ChangeLog index 5e3cbf8d97..024b548079 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,8 @@ +Thu Apr 13 09:45:01 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu> + + * elf/libelf.h (elf_hash): Use XOR instead of ANDN when the bits + being cleared are already known to be set. Thanks Ulrich. + Wed Apr 12 23:27:22 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu> * posix/environ.c: Add weak alias `_environ'. diff --git a/elf/libelf.h b/elf/libelf.h index e95dd93eaa..b6575b9824 100644 --- a/elf/libelf.h +++ b/elf/libelf.h @@ -220,8 +220,12 @@ elf_hash (__const char *__name) __hash = (__hash << 4) + *__name++; __hi = __hash & 0xf0000000; if (__hi != 0) - __hash ^= __hi >> 24; - __hash &= ~__hi; + { + __hash ^= __hi >> 24; + /* The ELF ABI says `hash &= ~hi', but this is equivalent + in this case and on some machines one insn instead of two. */ + __hash ^= __hi; + } } return __hash; } |