generic-library/bionic
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

am 88dcfb5e: Merge "Add ffs and memcmp16 to x86_64."

Browse Source 
* commit '88dcfb5ebaba0b02dac5d096491ea4278b849bb5':
  Add ffs and memcmp16 to x86_64.
This commit is contained in:
Elliott Hughes 2013-10-17 21:35:44 -07:00 committed by Android Git Automerger
commit 6519d76c29
2 changed files with 20 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
libc/arch-x86_64/string/ffs.S Normal file
View File

@ -0,0 +1,18 @@
/* $OpenBSD: ffs.S,v 1.1 2004/01/28 01:44:45 mickey Exp $ */
/*
* Written by J.T. Conklin <jtc@netbsd.org>.
* Public domain.
* Adapted for NetBSD/x86_64 by Frank van der Linden <fvdl@wasabisystems.com>
*/
#include <machine/asm.h>
ENTRY(ffs)
bsfl %edi,%eax
jz L1 /* ZF is set if all bits are 0 */
incl %eax /* bits numbered from 1, not 0 */
ret
_ALIGN_TEXT
L1: xorl %eax,%eax /* clear result */
ret

2
libc/arch-x86_64/x86_64.mk
View File

@ -9,6 +9,8 @@ _LIBC_ARCH_COMMON_SRC_FILES := \
arch-x86_64/bionic/__set_tls.c \
arch-x86_64/bionic/sigsetjmp.S \
arch-x86_64/bionic/syscall.S \
arch-x86_64/string/ffs.S \
string/memcmp16.c \
_LIBC_ARCH_STATIC_SRC_FILES := \
bionic/dl_iterate_phdr_static.c \