freebsd-dev/lib/libc/amd64/string/bcmp.S
Peter Wemm 5d053f461c We've been lax about matching END() macros in asm code for some time. This
is used to set the ELF size attribute for functions.  It isn't normally
critical but some things can make use of it (gdb for stack traces).
Valgrind needs it so I'm adding it in.  The problem is present on all
branches and on both i386 and amd64.
2008-11-02 01:10:54 +00:00

26 lines
383 B
ArmAsm

#include <machine/asm.h>
__FBSDID("$FreeBSD$");
#if 0
RCSID("$NetBSD: bcmp.S,v 1.1 2001/06/19 00:25:04 fvdl Exp $")
#endif
ENTRY(bcmp)
cld /* set compare direction forward */
movq %rdx,%rcx /* compare by words */
shrq $3,%rcx
repe
cmpsq
jne L1
movq %rdx,%rcx /* compare remainder by bytes */
andq $7,%rcx
repe
cmpsb
L1:
setne %al
movsbl %al,%eax
ret
END(bcmp)