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diff --git a/gmp/mpn/x86/p6/sse2/gmp-mparam.h b/gmp/mpn/x86/p6/sse2/gmp-mparam.h
new file mode 100644
index 00000000..843227b9
--- /dev/null
+++ b/gmp/mpn/x86/p6/sse2/gmp-mparam.h
@@ -0,0 +1,74 @@
+/* Intel P6/sse2 gmp-mparam.h -- Compiler/machine parameter header file.
+
+Copyright 1991, 1993, 1994, 1999, 2000, 2001, 2002, 2003, 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 32
+#define BYTES_PER_MP_LIMB 4
+
+
+/* NOTE: In a fat binary build SQR_KARATSUBA_THRESHOLD here cannot be more
+   than the value in mpn/x86/p6/gmp-mparam.h.  The latter is used as a hard
+   limit in mpn/x86/p6/sqr_basecase.asm.  */
+
+
+/* 1867 MHz P6 model 13 */
+
+/* Generated by tuneupc, 2008-10-30, gcc 4.3 */
+
+#define MUL_KARATSUBA_THRESHOLD          20
+#define MUL_TOOM3_THRESHOLD              77
+#define MUL_TOOM44_THRESHOLD            142
+
+#define SQR_BASECASE_THRESHOLD            0  /* always (native) */
+#define SQR_KARATSUBA_THRESHOLD          30
+#define SQR_TOOM3_THRESHOLD             101
+#define SQR_TOOM4_THRESHOLD             154
+
+#define MULLOW_BASECASE_THRESHOLD         4
+#define MULLOW_DC_THRESHOLD              38
+#define MULLOW_MUL_N_THRESHOLD          234
+
+#define DIV_SB_PREINV_THRESHOLD           0  /* always */
+#define DIV_DC_THRESHOLD                 24
+#define POWM_THRESHOLD                  150
+
+#define MATRIX22_STRASSEN_THRESHOLD      23
+#define HGCD_THRESHOLD                   95
+#define GCD_DC_THRESHOLD                381
+#define GCDEXT_DC_THRESHOLD             419
+#define JACOBI_BASE_METHOD                1
+
+#define USE_PREINV_DIVREM_1               1  /* native */
+#define USE_PREINV_MOD_1                  1  /* native */
+#define DIVEXACT_1_THRESHOLD              0  /* always (native) */
+#define MODEXACT_1_ODD_THRESHOLD          0  /* always (native) */
+
+#define GET_STR_DC_THRESHOLD             14
+#define GET_STR_PRECOMPUTE_THRESHOLD     24
+#define SET_STR_DC_THRESHOLD            276
+#define SET_STR_PRECOMPUTE_THRESHOLD   1078
+
+#define MUL_FFT_TABLE  { 400, 928, 1664, 3584, 10240, 40960, 98304, 393216, 1572864, 0 }
+#define MUL_FFT_MODF_THRESHOLD          496
+#define MUL_FFT_THRESHOLD              7168
+
+#define SQR_FFT_TABLE  { 432, 928, 1664, 3584, 10240, 40960, 98304, 393216, 1572864, 0 }
+#define SQR_FFT_MODF_THRESHOLD          448
+#define SQR_FFT_THRESHOLD              3840