diff options
Diffstat (limited to 'lib/libc/arch/amd64/string/memcmp.S')
| -rw-r--r-- | lib/libc/arch/amd64/string/memcmp.S | 36 |
1 files changed, 0 insertions, 36 deletions
diff --git a/lib/libc/arch/amd64/string/memcmp.S b/lib/libc/arch/amd64/string/memcmp.S deleted file mode 100644 index d32c66d5b93..00000000000 --- a/lib/libc/arch/amd64/string/memcmp.S +++ /dev/null @@ -1,36 +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> - -ENTRY(memcmp) - cld /* set compare direction forward */ - movq %rdx,%rcx /* compare by longs */ - shrq $3,%rcx - repe - cmpsq - jne L5 /* do we match so far? */ - - movq %rdx,%rcx /* compare remainder by bytes */ - andq $7,%rcx - repe - cmpsb - jne L6 /* do we match? */ - - xorl %eax,%eax /* we match, return zero */ - ret - -L5: movl $8,%ecx /* We know that one of the next */ - subq %rcx,%rdi /* eight pairs of bytes do not */ - subq %rcx,%rsi /* match. */ - repe - cmpsb -L6: xorl %eax,%eax /* Perform unsigned comparison */ - movb -1(%rdi),%al - xorl %edx,%edx - movb -1(%rsi),%dl - subl %edx,%eax - ret |