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diff --git a/gmp/mpn/arm/copyd.asm b/gmp/mpn/arm/copyd.asm
new file mode 100644
index 00000000..718b762b
--- /dev/null
+++ b/gmp/mpn/arm/copyd.asm
@@ -0,0 +1,58 @@
+dnl  ARM mpn_copyd.
+
+dnl  Copyright 2003 Free Software Foundation, Inc.
+
+dnl  This file is part of the GNU MP Library.
+
+dnl  The GNU MP Library is free software; you can redistribute it and/or modify
+dnl  it under the terms of the GNU Lesser General Public License as published
+dnl  by the Free Software Foundation; either version 3 of the License, or (at
+dnl  your option) any later version.
+
+dnl  The GNU MP Library is distributed in the hope that it will be useful, but
+dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+dnl  License for more details.
+
+dnl  You should have received a copy of the GNU Lesser General Public License
+dnl  along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.
+
+include(`../config.m4')
+
+C This runs at 3 cycles/limb in the StrongARM.
+
+define(`rp',`r0')
+define(`up',`r1')
+define(`n',`r2')
+
+
+ASM_START()
+PROLOGUE(mpn_copyd)
+	mov	r12, n, lsl #2
+	sub	r12, r12, #4
+	add	rp, rp, r12			C make rp point at last limb
+	add	up, up, r12			C make up point at last limb
+
+	tst	n, #1
+	beq	L(skip1)
+	ldr	r3, [up], #-4
+	str	r3, [rp], #-4
+L(skip1):
+	tst	n, #2
+	beq	L(skip2)
+	ldmda	up!, { r3, r12 }		C load 2 limbs
+	stmda	rp!, { r3, r12 }		C store 2 limbs
+L(skip2):
+	bics	n, n, #3
+	beq	L(return)
+	stmfd	sp!, { r7, r8, r9 }		C save regs on stack
+L(loop):
+	ldmda	up!, { r3, r8, r9, r12 }	C load 4 limbs
+	ldr	r7, [rp, #-12]			C cache allocate
+	subs	n, n, #4
+	stmda	rp!, { r3, r8, r9, r12 }	C store 4 limbs
+	bne	L(loop)
+	ldmfd	sp!, { r7, r8, r9 }		C restore regs from stack
+L(return):
+	mov	pc, lr
+EPILOGUE(mpn_copyd)