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diff --git a/gmp/mpn/powerpc32/sqr_diagonal.asm b/gmp/mpn/powerpc32/sqr_diagonal.asm
new file mode 100644
index 00000000..d315349f
--- /dev/null
+++ b/gmp/mpn/powerpc32/sqr_diagonal.asm
@@ -0,0 +1,103 @@
+dnl  PowerPC-32 mpn_sqr_diagonal.
+
+dnl  Copyright 2001, 2002, 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 603e:             ?
+C 604e:             4.0
+C 75x (G3):        10.5
+C 7400,7410 (G4):  10.5
+C 744x,745x (G4+):  4.0
+C power4/ppc970:    8.6
+C power5:           7.0
+
+C INPUT PARAMETERS
+C rp	r3
+C up	r4
+C n	r5
+
+ASM_START()
+PROLOGUE(mpn_sqr_diagonal)
+	lwz	r6,0(r4)
+	mtctr	r5
+
+	addi	r3,r3,-4
+	bdz	L(end1)
+
+	lwzu	r7,4(r4)
+	mullw	r9,r6,r6
+	mulhwu	r11,r6,r6
+	bdz	L(end2)
+
+	lwzu	r6,4(r4)
+	mullw	r8,r7,r7
+	mulhwu	r10,r7,r7
+	bdz	L(ende)
+
+L(loop):
+	lwzu	r7,4(r4)
+	stw	r9,4(r3)
+	mullw	r9,r6,r6
+	stwu	r11,8(r3)
+	mulhwu	r11,r6,r6
+	bdz	L(endo)
+	lwzu	r6,4(r4)
+	stw	r8,4(r3)
+	mullw	r8,r7,r7
+	stwu	r10,8(r3)
+	mulhwu	r10,r7,r7
+	bdnz	L(loop)
+
+L(ende):
+	stw	r9,4(r3)
+	mullw	r9,r6,r6
+	stw	r11,8(r3)
+	mulhwu	r11,r6,r6
+	stw	r8,12(r3)
+	stw	r10,16(r3)
+	stw	r9,20(r3)
+	stw	r11,24(r3)
+	blr
+L(endo):
+	stw	r8,4(r3)
+	mullw	r8,r7,r7
+	stw	r10,8(r3)
+	mulhwu	r10,r7,r7
+	stw	r9,12(r3)
+	stw	r11,16(r3)
+	stw	r8,20(r3)
+	stw	r10,24(r3)
+	blr
+
+L(end2):
+	mullw	r8,r7,r7
+	stw	r9,4(r3)
+	mulhwu	r10,r7,r7
+	stw	r11,8(r3)
+	stw	r8,12(r3)
+	stw	r10,16(r3)
+	blr
+L(end1):
+	mullw	r9,r6,r6
+	mulhwu	r11,r6,r6
+	stw	r9,4(r3)
+	stw	r11,8(r3)
+	blr
+EPILOGUE(mpn_sqr_diagonal)