And rindex.S...

lib/libc/arch/i386/Makefile.inc

@@ -1,7 +1,7 @@
-#	$NetBSD: Makefile.inc,v 1.8 1998/02/22 07:20:24 mycroft Exp $
+#	$NetBSD: Makefile.inc,v 1.9 1998/02/22 07:21:32 mycroft Exp $
 
 KMINCLUDES= arch/i386/SYS.h
-KMSRCS=	bcmp.S bcopy.S bzero.S ffs.S index.S \
+KMSRCS=	bcmp.S bcopy.S bzero.S ffs.S index.S rindex.S \
 	memchr.S memcpy.S memset.S \
 	strcat.S strchr.S strcmp.S strcpy.S strlen.S strrchr.S \
 	htonl.S htons.S ntohl.S ntohs.S

sys/lib/libkern/arch/i386/rindex.S

@@ -0,0 +1,32 @@
+/*
+ * Written by J.T. Conklin <jtc@netbsd.org>.
+ * Public domain.
+ */
+
+#include <machine/asm.h>
+
+#if defined(LIBC_SCCS)
+	RCSID("$NetBSD: rindex.S,v 1.1 1998/02/22 07:21:53 mycroft Exp $")
+#endif
+
+#ifdef STRRCHR
+ENTRY(strrchr)
+#else
+ENTRY(rindex)
+#endif
+	pushl	%ebx
+	movl	8(%esp),%edx
+	movb	12(%esp),%cl
+	xorl	%eax,%eax		/* init pointer to null */
+	.align 2,0x90
+L1:
+	movb	(%edx),%bl
+	cmpb	%bl,%cl
+	jne	L2
+	movl	%edx,%eax
+L2:
+	incl	%edx
+	testb	%bl,%bl			/* null terminator??? */
+	jnz	L1
+	popl	%ebx
+	ret