diff options
| author |   mickey <mickey@openbsd.org> | 2004-01-28 01:44:44 +0000 |
|---|---|---|
| committer | mickey <mickey@openbsd.org> | 2004-01-28 01:44:44 +0000 |
| commit | 118f6189edb47d41d3a0badafe95d9585c0d1c57 (patch) | |
| tree | c3faff936ba5ff911d7de4701203333f4e180b66 /lib/libc/arch/amd64/string | |
| parent | an amd64 arch support. (diff) | |
| download | wireguard-openbsd-118f6189edb47d41d3a0badafe95d9585c0d1c57.tar.xz wireguard-openbsd-118f6189edb47d41d3a0badafe95d9585c0d1c57.zip | |
things for amd64; from art@
Diffstat (limited to 'lib/libc/arch/amd64/string')
| -rw-r--r-- | lib/libc/arch/amd64/string/Makefile.inc | 6 | ||||
| -rw-r--r-- | lib/libc/arch/amd64/string/ffs.S | 18 | ||||
| -rw-r--r-- | lib/libc/arch/amd64/string/strlen.S | 18 |
3 files changed, 42 insertions, 0 deletions
diff --git a/lib/libc/arch/amd64/string/Makefile.inc b/lib/libc/arch/amd64/string/Makefile.inc new file mode 100644 index 00000000000..002194e1d8c --- /dev/null +++ b/lib/libc/arch/amd64/string/Makefile.inc @@ -0,0 +1,6 @@ +# $OpenBSD: Makefile.inc,v 1.1 2004/01/28 01:44:45 mickey Exp $ + +SRCS+= bcmp.c ffs.S index.c memchr.c memcmp.c bcopy.c bzero.c \ + rindex.c strcat.c strcmp.c strcpy.c strcspn.c strlen.S \ + strncat.c strncmp.c strncpy.c strpbrk.c strsep.c \ + strspn.c strstr.c swab.c memset.c strlcpy.c strlcat.c diff --git a/lib/libc/arch/amd64/string/ffs.S b/lib/libc/arch/amd64/string/ffs.S new file mode 100644 index 00000000000..2666bc49e9d --- /dev/null +++ b/lib/libc/arch/amd64/string/ffs.S @@ -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 diff --git a/lib/libc/arch/amd64/string/strlen.S b/lib/libc/arch/amd64/string/strlen.S new file mode 100644 index 00000000000..3afccb8f1ac --- /dev/null +++ b/lib/libc/arch/amd64/string/strlen.S @@ -0,0 +1,18 @@ +/* $OpenBSD: strlen.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(strlen) + cld /* set search forward */ + xorl %eax,%eax /* set search for null terminator */ + movq $-1,%rcx /* set search for lots of characters */ + repne /* search! */ + scasb + notq %rcx /* get length by taking complement */ + leaq -1(%rcx),%rax /* and subtracting one */ + ret |