diff options
Diffstat (limited to 'sys/lib/libkern/arch/x86_64/bzero.S')
| -rw-r--r-- | sys/lib/libkern/arch/x86_64/bzero.S | 44 |
1 files changed, 0 insertions, 44 deletions
diff --git a/sys/lib/libkern/arch/x86_64/bzero.S b/sys/lib/libkern/arch/x86_64/bzero.S deleted file mode 100644 index 6e4fe834d1a..00000000000 --- a/sys/lib/libkern/arch/x86_64/bzero.S +++ /dev/null @@ -1,44 +0,0 @@ -/* - * 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: bzero.S,v 1.1 2001/06/19 00:22:45 fvdl Exp $") -#endif - -ENTRY(bzero) - movq %rsi,%rdx - - cld /* set fill direction forward */ - xorq %rax,%rax /* set fill data to 0 */ - - /* - * if the string is too short, it's really not worth the overhead - * of aligning to word boundries, etc. So we jump to a plain - * unaligned set. - */ - cmpq $16,%rdx - jb L1 - - movq %rdi,%rcx /* compute misalignment */ - negq %rcx - andq $7,%rcx - subq %rcx,%rdx - rep /* zero until word aligned */ - stosb - - movq %rdx,%rcx /* zero by words */ - shrq $3,%rcx - andq $7,%rdx - rep - stosq - -L1: movq %rdx,%rcx /* zero remainder by bytes */ - rep - stosb - - ret |