diff --git a/lib/libc/amd64/string/bcmp.S b/lib/libc/amd64/string/bcmp.S
deleted file mode 100644
index efdc6d33e4dd..000000000000
--- a/lib/libc/amd64/string/bcmp.S
+++ /dev/null
@@ -1,121 +0,0 @@
-/*-
- * Copyright (c) 2018 The FreeBSD Foundation
- *
- * This software was developed by Mateusz Guzik <mjg@FreeBSD.org>
- * under sponsorship from the FreeBSD Foundation.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * $FreeBSD$
- */
-
-#include <machine/asm.h>
-__FBSDID("$FreeBSD$");
-
-ENTRY(bcmp)
-	cmpq	$16,%rdx
-	jae	5f
-1:
-	testq	%rdx,%rdx
-	je	3f
-	xorl	%ecx,%ecx
-2:
-	movzbl	(%rdi,%rcx,1),%eax
-	movzbl	(%rsi,%rcx,1),%r8d
-	cmpb	%r8b,%al
-	jne	4f
-	addq	$1,%rcx
-	cmpq	%rcx,%rdx
-	jz	3f
-	movzbl	(%rdi,%rcx,1),%eax
-	movzbl	(%rsi,%rcx,1),%r8d
-	cmpb	%r8b,%al
-	jne	4f
-	addq	$1,%rcx
-	cmpq	%rcx,%rdx
-	jz	3f
-	movzbl	(%rdi,%rcx,1),%eax
-	movzbl	(%rsi,%rcx,1),%r8d
-	cmpb	%r8b,%al
-	jne	4f
-	addq	$1,%rcx
-	cmpq	%rcx,%rdx
-	jz	3f
-	movzbl	(%rdi,%rcx,1),%eax
-	movzbl	(%rsi,%rcx,1),%r8d
-	cmpb	%r8b,%al
-	jne	4f
-	addq	$1,%rcx
-	cmpq	%rcx,%rdx
-	jne	2b
-3:
-	xorl	%eax,%eax
-	ret
-4:
-	movl	$1,%eax
-	ret
-5:
-	cmpq	$32,%rdx
-	jae	7f
-6:
-	/*
-	 * 8 bytes
-	 */
-	movq	(%rdi),%r8
-	movq	(%rsi),%r9
-	cmpq	%r8,%r9
-	jne	4b
-	leaq	8(%rdi),%rdi
-	leaq	8(%rsi),%rsi
-	subq	$8,%rdx
-	cmpq	$8,%rdx
-	jae	6b
-	jl	1b
-	jmp	3b
-7:
-	/*
-	 * 32 bytes
-	 */
-	movq	(%rsi),%r8
-	movq	8(%rsi),%r9
-	subq	(%rdi),%r8
-	subq	8(%rdi),%r9
-	or	%r8,%r9
-	jnz	4b
-
-	movq	16(%rsi),%r8
-	movq	24(%rsi),%r9
-	subq	16(%rdi),%r8
-	subq	24(%rdi),%r9
-	or	%r8,%r9
-	jnz	4b
-
-	leaq	32(%rdi),%rdi
-	leaq	32(%rsi),%rsi
-	subq	$32,%rdx
-	cmpq	$32,%rdx
-	jae	7b
-	jnz	1b
-	jmp	3b
-END(bcmp)
-
-	.section .note.GNU-stack,"",%progbits