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Add ffs and memcmp16 to x86_64.

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Change-Id: I652c1356f1c7c52299977181c2cf154386979380
This commit is contained in:
Elliott Hughes 2013-10-17 17:03:22 -07:00
parent 5b19160437
commit 8ca530e559
2 changed files with 20 additions and 0 deletions
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18
libc/arch-x86_64/string/ffs.S Normal file
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@ -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
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@ -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 \