Add libgmp 6.2.0 to third_party
Don't build it yet. That will come in the next review.
Change-Id: Idf3266558165e5ab45f4a41c98cc8c838c8244d5
diff --git a/third_party/gmp/mpn/vax/gmp-mparam.h b/third_party/gmp/mpn/vax/gmp-mparam.h
new file mode 100644
index 0000000..9f20b9b
--- /dev/null
+++ b/third_party/gmp/mpn/vax/gmp-mparam.h
@@ -0,0 +1,60 @@
+/* VAX gmp-mparam.h -- Compiler/machine parameter header file.
+
+Copyright 2000-2002 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 either:
+
+ * 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.
+
+or
+
+ * the GNU General Public License as published by the Free Software
+ Foundation; either version 2 of the License, or (at your option) any
+ later version.
+
+or both in parallel, as here.
+
+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 General Public License
+for more details.
+
+You should have received copies of the GNU General Public License and the
+GNU Lesser General Public License along with the GNU MP Library. If not,
+see https://www.gnu.org/licenses/. */
+
+/* These numbers were measured manually using the tune/speed program.
+ The standard tune/tuneup takes too long. (VAX 8800) */
+
+#define MUL_TOOM22_THRESHOLD 14
+#define MUL_TOOM33_THRESHOLD 110
+
+#define SQR_BASECASE_THRESHOLD 6
+#define SQR_TOOM2_THRESHOLD 42
+#define SQR_TOOM3_THRESHOLD 250
+
+/* #define DIV_SB_PREINV_THRESHOLD */
+/* #define DIV_DC_THRESHOLD */
+/* #define POWM_THRESHOLD */
+
+/* #define GCD_ACCEL_THRESHOLD */
+/* #define JACOBI_BASE_METHOD */
+
+/* #define DIVREM_1_NORM_THRESHOLD */
+/* #define DIVREM_1_UNNORM_THRESHOLD */
+/* #define MOD_1_NORM_THRESHOLD */
+/* #define MOD_1_UNNORM_THRESHOLD */
+/* #define USE_PREINV_DIVREM_1 */
+/* #define USE_PREINV_MOD_1 */
+/* #define DIVREM_2_THRESHOLD */
+/* #define DIVEXACT_1_THRESHOLD */
+/* #define MODEXACT_1_ODD_THRESHOLD */
+
+/* #define GET_STR_DC_THRESHOLD */
+/* #define GET_STR_PRECOMPUTE_THRESHOLD */
+#define SET_STR_THRESHOLD 3400