diff --git a/libc/arch-x86/string/strcmp.S b/libc/arch-x86/string/strcmp.S
new file mode 100644
index 0000000..22ba546
--- /dev/null
+++ b/libc/arch-x86/string/strcmp.S
@@ -0,0 +1,81 @@
+/*	$OpenBSD: strcmp.S,v 1.3 2005/08/07 11:30:38 espie Exp $ */
+/*
+ * Written by J.T. Conklin <jtc@netbsd.org>.
+ * Public domain.
+ */
+
+#include <machine/asm.h>
+
+/*
+ * NOTE: I've unrolled the loop eight times: large enough to make a
+ * significant difference, and small enough not to totally trash the
+ * cache.
+ */
+
+ENTRY(strcmp)
+	movl	0x04(%esp),%eax
+	movl	0x08(%esp),%edx
+	jmp	L2			/* Jump into the loop! */
+
+	.align	2,0x90
+L1:	incl	%eax
+	incl	%edx
+L2:	movb	(%eax),%cl
+	testb	%cl,%cl			/* null terminator??? */
+	jz	L3
+	cmpb	%cl,(%edx)		/* chars match??? */
+	jne	L3
+	incl	%eax
+	incl	%edx
+	movb	(%eax),%cl
+	testb	%cl,%cl
+	jz	L3
+	cmpb	%cl,(%edx)
+	jne	L3
+	incl	%eax
+	incl	%edx
+	movb	(%eax),%cl
+	testb	%cl,%cl
+	jz	L3
+	cmpb	%cl,(%edx)
+	jne	L3
+	incl	%eax
+	incl	%edx
+	movb	(%eax),%cl
+	testb	%cl,%cl
+	jz	L3
+	cmpb	%cl,(%edx)
+	jne	L3
+	incl	%eax
+	incl	%edx
+	movb	(%eax),%cl
+	testb	%cl,%cl
+	jz	L3
+	cmpb	%cl,(%edx)
+	jne	L3
+	incl	%eax
+	incl	%edx
+	movb	(%eax),%cl
+	testb	%cl,%cl
+	jz	L3
+	cmpb	%cl,(%edx)
+	jne	L3
+	incl	%eax
+	incl	%edx
+	movb	(%eax),%cl
+	testb	%cl,%cl
+	jz	L3
+	cmpb	%cl,(%edx)
+	jne	L3
+	incl	%eax
+	incl	%edx
+	movb	(%eax),%cl
+	testb	%cl,%cl
+	jz	L3
+	cmpb	%cl,(%edx)
+	je	L1
+	.align 2, 0x90
+L3:	movzbl	(%eax),%eax		/* unsigned comparison */
+	movzbl	(%edx),%edx
+	subl	%edx,%eax
+	ret