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diff --git a/gmp/mpn/powerpc64/lshift.asm b/gmp/mpn/powerpc64/lshift.asm
new file mode 100644
index 00000000..41e5ddd8
--- /dev/null
+++ b/gmp/mpn/powerpc64/lshift.asm
@@ -0,0 +1,116 @@
+dnl  PowerPC-64 mpn_lshift -- rp[] = up[] << cnt
+
+dnl  Copyright 2003, 2005 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		cycles/limb
+C POWER3/PPC630:     1.5
+C POWER4/PPC970:     3.0
+
+C INPUT PARAMETERS
+define(`rp',`r3')
+define(`up',`r4')
+define(`n',`r5')
+define(`cnt',`r6')
+
+define(`tnc',`r5')
+define(`v0',`r0')
+define(`v1',`r7')
+define(`u0',`r8')
+define(`u1',`r9')
+define(`h0',`r10')
+define(`h1',`r11')
+
+
+ASM_START()
+PROLOGUE(mpn_lshift)
+ifdef(`HAVE_ABI_mode32',
+`	rldicl	r7, r5, 0, 32	C zero extend n
+	mtctr	r7',		C copy n to count register
+`	mtctr	n')		C copy n to count register
+
+ifdef(`HAVE_ABI_mode32',
+`	rldic	r0, n, 3, 32',	C byte count corresponding to n
+`	rldicr	r0, n, 3, 60')	C byte count corresponding to n
+
+	add	rp, rp, r0	C rp = rp + n
+	add	up, up, r0	C up = up + n
+	addi	rp, rp, 8	C rp now points 16 beyond end
+	addi	up, up, -8	C up now points to last limb
+	subfic	tnc, cnt, 64	C reverse shift count
+
+	ld	u0, 0(up)
+	sld	h0, u0, cnt
+	srd	r12, u0, tnc	C return value
+	bdz	L(1)		C jump for n = 1
+
+	ld	u1, -8(up)
+	bdz	L(2)		C jump for n = 2
+
+	ldu	u0, -16(up)
+	bdz	L(end)		C jump for n = 3
+
+L(oop):	srd	v1, u1, tnc
+	sld	h1, u1, cnt
+	ld	u1, -8(up)
+	or	h0, v1, h0
+	stdu	h0, -16(rp)
+
+	bdz	L(exit)
+
+	srd	v0, u0, tnc
+	sld	h0, u0, cnt
+	ldu	u0, -16(up)
+	or	h1, v0, h1
+	std	h1, -8(rp)
+
+	bdnz	L(oop)
+
+L(end):	srd	v1, u1, tnc
+	sld	h1, u1, cnt
+	or	h0, v1, h0
+	stdu	h0, -16(rp)
+	srd	v0, u0, tnc
+	sld	h0, u0, cnt
+	or	h1, v0, h1
+	std	h1, -8(rp)
+L(1):	std	h0, -16(rp)
+ifdef(`HAVE_ABI_mode32',
+`	srdi	r3, r12, 32
+	mr	r4, r12
+',`	mr	r3, r12
+')
+	blr
+
+L(exit):	srd	v0, u0, tnc
+	sld	h0, u0, cnt
+	or	h1, v0, h1
+	std	h1, -8(rp)
+L(2):	srd	v1, u1, tnc
+	sld	h1, u1, cnt
+	or	h0, v1, h0
+	stdu	h0, -16(rp)
+	std	h1, -8(rp)
+ifdef(`HAVE_ABI_mode32',
+`	srdi	r3, r12, 32
+	mr	r4, r12
+',`	mr	r3, r12
+')
+	blr
+EPILOGUE()