From 6e33fad374814f1a4bf80aa37d4ded9c9096edab Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Fri, 14 Apr 1995 01:13:53 +0000 Subject: [PATCH] Thu Apr 13 09:45:01 1995 Roland McGrath * elf/libelf.h (elf_hash): Use XOR instead of ANDN when the bits being cleared are already known to be set. Thanks Ulrich. --- ChangeLog | 5 +++++ 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 + + * 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 * 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; }