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diff --git a/rts/gmp/mpn/powerpc64/sub_n.asm b/rts/gmp/mpn/powerpc64/sub_n.asm
deleted file mode 100644
index 4de3de6..0000000
--- a/rts/gmp/mpn/powerpc64/sub_n.asm
+++ /dev/null
@@ -1,61 +0,0 @@
-# PowerPC-64 mpn_sub_n -- Subtract two limb vectors of the same length > 0
-# and store difference in a third limb vector.
-
-# Copyright (C) 1999, 2000 Free Software Foundation, Inc.b
-
-# This file is part of the GNU MP Library.
-
-# The GNU MP 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 MP 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 MP Library; see the file COPYING.LIB.  If not, write to
-# the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
-# MA 02111-1307, USA.
-
-
-# INPUT PARAMETERS
-# res_ptr	r3
-# s1_ptr	r4
-# s2_ptr	r5
-# size		r6
-
-include(`../config.m4')
-
-ASM_START()
-PROLOGUE(mpn_sub_n)
-	mtctr	r6		# copy size into CTR
-	addic	r0,r6,-1	# set cy
-	ld	r8,0(r4)	# load least significant s1 limb
-	ld	r0,0(r5)	# load least significant s2 limb
-	addi	r3,r3,-8	# offset res_ptr, it's updated before it's used
-	bdz	.Lend		# If done, skip loop
-.Loop:	ld	r9,8(r4)	# load s1 limb
-	ld	r10,8(r5)	# load s2 limb
-	subfe	r7,r0,r8	# subtract limbs with cy, set cy
-	std	r7,8(r3)	# store result limb
-	bdz	.Lexit		# decrement CTR and exit if done
-	ldu	r8,16(r4)	# load s1 limb and update s1_ptr
-	ldu	r0,16(r5)	# load s2 limb and update s2_ptr
-	subfe	r7,r10,r9	# subtract limbs with cy, set cy
-	stdu	r7,16(r3)	# store result limb and update res_ptr
-	bdnz	.Loop		# decrement CTR and loop back
-
-.Lend:	subfe	r7,r0,r8
-	std	r7,8(r3)	# store ultimate result limb
-	subfe	r3,r0,r0	# load !cy into ...
-	subfic	r3,r3,0		# ... return value register
-	blr
-.Lexit:	subfe	r7,r10,r9
-	std	r7,16(r3)
-	subfe	r3,r0,r0	# load !cy into ...
-	subfic	r3,r3,0		# ... return value register
-	blr
-EPILOGUE(mpn_sub_n)