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diff --git a/sysdeps/aarch64/multiarch/memset_mops.S b/sysdeps/aarch64/multiarch/memset_mops.S
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+/* Optimized memset for MOPS.
+   Copyright (C) 2023 Free Software Foundation, Inc.
+
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+
+/* Assumptions:
+ *
+ * AArch64, MOPS.
+ *
+ */
+
+ENTRY (__memset_mops)
+	PTR_ARG (0)
+	SIZE_ARG (2)
+
+	mov     x3, x0
+	.inst   0x19c10443	/* setp    [x3]!, x2!, x1  */
+	.inst   0x19c14443	/* setm    [x3]!, x2!, x1  */
+	.inst   0x19c18443	/* sete    [x3]!, x2!, x1  */
+	ret
+
+END (__memset_mops)