diff options
| author |   mickey <mickey@openbsd.org> | 2004-01-28 01:39:38 +0000 |
|---|---|---|
| committer | mickey <mickey@openbsd.org> | 2004-01-28 01:39:38 +0000 |
| commit | f5df1827e930693b77256fbf32ab5050c01d960c (patch) | |
| tree | 864af18bc7e8bce47743bc121c791bd7c200c097 /sys/lib/libkern/arch/amd64/rindex.S | |
| parent | remove unused variable. ok millert@ (diff) | |
| download | wireguard-openbsd-f5df1827e930693b77256fbf32ab5050c01d960c.tar.xz wireguard-openbsd-f5df1827e930693b77256fbf32ab5050c01d960c.zip | |
an amd64 arch support.
hacked by art@ from netbsd sources and then later debugged
by me into the shape where it can host itself.
no bootloader yet as needs redoing from the
recent advanced i386 sources (anyone? ;)
Diffstat (limited to 'sys/lib/libkern/arch/amd64/rindex.S')
| -rw-r--r-- | sys/lib/libkern/arch/amd64/rindex.S | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/sys/lib/libkern/arch/amd64/rindex.S b/sys/lib/libkern/arch/amd64/rindex.S new file mode 100644 index 00000000000..6ba7c52a11f --- /dev/null +++ b/sys/lib/libkern/arch/amd64/rindex.S @@ -0,0 +1,29 @@ +/* + * 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> + +#if defined(LIBC_SCCS) + RCSID("$NetBSD: rindex.S,v 1.1 2001/06/19 00:22:47 fvdl Exp $") +#endif + +#ifdef STRRCHR +ENTRY(strrchr) +#else +ENTRY(rindex) +#endif + movb %sil,%cl + xorq %rax,%rax /* init pointer to null */ +L1: + movb (%rdi),%dl + cmpb %dl,%cl + jne L2 + movq %rdi,%rax +L2: + incq %rdi + testb %dl,%dl /* null terminator??? */ + jnz L1 + ret |