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diff --git a/gmp/mpn/powerpc64/mode64/gmp-mparam.h b/gmp/mpn/powerpc64/mode64/gmp-mparam.h
new file mode 100644
index 00000000..4eb88877
--- /dev/null
+++ b/gmp/mpn/powerpc64/mode64/gmp-mparam.h
@@ -0,0 +1,77 @@
+/* PowerPC-64 gmp-mparam.h -- Compiler/machine parameter header file.
+
+Copyright 2008, 2009 Free Software Foundation, Inc.
+
+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 3 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.  If not, see http://www.gnu.org/licenses/.  */
+
+#define BITS_PER_MP_LIMB 64
+#define BYTES_PER_MP_LIMB 8
+
+/* 1600MHz PPC970 */
+
+/* Generated by tuneup.c, 2009-01-14, gcc 4.0 */
+
+#define MUL_KARATSUBA_THRESHOLD          14
+#define MUL_TOOM3_THRESHOLD              57
+#define MUL_TOOM44_THRESHOLD            155
+
+#define SQR_BASECASE_THRESHOLD            5
+#define SQR_KARATSUBA_THRESHOLD          32
+#define SQR_TOOM3_THRESHOLD              89
+#define SQR_TOOM4_THRESHOLD             154
+
+#define MULLOW_BASECASE_THRESHOLD         0  /* always */
+#define MULLOW_DC_THRESHOLD              40
+#define MULLOW_MUL_N_THRESHOLD          234
+
+#define DIV_SB_PREINV_THRESHOLD           0  /* always */
+#define DIV_DC_THRESHOLD                 32
+#define POWM_THRESHOLD                   93
+
+#define MATRIX22_STRASSEN_THRESHOLD      19
+#define HGCD_THRESHOLD                   96
+#define GCD_DC_THRESHOLD                242
+#define GCDEXT_DC_THRESHOLD             353
+#define JACOBI_BASE_METHOD                1
+
+#define MOD_1_NORM_THRESHOLD              0  /* always */
+#define MOD_1_UNNORM_THRESHOLD            0  /* always */
+#define MOD_1_1_THRESHOLD                 7
+#define MOD_1_2_THRESHOLD                 9
+#define MOD_1_4_THRESHOLD                44
+#define USE_PREINV_DIVREM_1               0
+#define USE_PREINV_MOD_1                  1
+#define DIVEXACT_1_THRESHOLD              0  /* always (native) */
+#define MODEXACT_1_ODD_THRESHOLD          0  /* always */
+
+#define GET_STR_DC_THRESHOLD             10
+#define GET_STR_PRECOMPUTE_THRESHOLD     20
+#define SET_STR_DC_THRESHOLD            532
+#define SET_STR_PRECOMPUTE_THRESHOLD   1790
+
+#define MUL_FFT_TABLE  { 336, 672, 1856, 2816, 7168, 20480, 81920, 327680, 0 }
+#define MUL_FFT_MODF_THRESHOLD          304
+#define MUL_FFT_THRESHOLD              4224
+
+#define SQR_FFT_TABLE  { 272, 672, 1600, 2816, 7168, 20480, 81920, 327680, 786432, 0 }
+#define SQR_FFT_MODF_THRESHOLD          272
+#define SQR_FFT_THRESHOLD              2688
+
+/* These tables are now obsolete */
+
+#define MUL_FFT_TABLE2 {{1,4}, {209,5}, {513,6}, {1217,7}, {2561,8}, {3329,7}, {3457,8}, {3841,7}, {4097,8}, {6913,9}, {7681,8}, {8961,9}, {9729,8}, {10497,9}, {13825,10}, {15361,9}, {22017,10}, {23553,9}, {26113,11}, {30721,10}, {48129,9}, {50689,10}, {56321,11}, {61441,10}, {81409,11}, {96257,10}, {97281,9}, {98305,10}, {99329,9}, {101889,10}, {106241,12}, {126977,11}, {129025,10}, {146945,11}, {161793,10}, {179969,11}, {194561,10}, {212737,11}, {227329,10}, {228865,12}, {258049,11}, {359937,12}, {389121,11}, {458241,13}, {516097,12}, {520193,11}, {588801,12}, {651265,11}, {720385,12}, {782337,11}, {851457,12}, {913409,11}, {982529,12}, {MP_SIZE_T_MAX,0}}
+
+#define SQR_FFT_TABLE2 {{1,4}, {209,5}, {481,6}, {1089,7}, {3073,8}, {6913,9}, {7681,8}, {8449,9}, {13825,10}, {15361,9}, {19969,10}, {23553,9}, {26113,11}, {30721,10}, {31745,9}, {34305,10}, {56321,11}, {63489,10}, {81409,11}, {96257,9}, {96769,10}, {98049,12}, {126977,11}, {129025,10}, {146945,11}, {161793,10}, {212481,12}, {258049,11}, {267265,10}, {270337,11}, {272385,10}, {274433,11}, {424961,13}, {516097,12}, {520193,11}, {MP_SIZE_T_MAX,0}}