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/x86/copyd.asm b/third_party/gmp/mpn/x86/copyd.asm
new file mode 100644
index 0000000..51fa195
--- /dev/null
+++ b/third_party/gmp/mpn/x86/copyd.asm
@@ -0,0 +1,91 @@
+dnl x86 mpn_copyd -- copy limb vector, decrementing.
+
+dnl Copyright 1999-2002 Free Software Foundation, Inc.
+
+dnl This file is part of the GNU MP Library.
+dnl
+dnl The GNU MP Library is free software; you can redistribute it and/or modify
+dnl it under the terms of either:
+dnl
+dnl * the GNU Lesser General Public License as published by the Free
+dnl Software Foundation; either version 3 of the License, or (at your
+dnl option) any later version.
+dnl
+dnl or
+dnl
+dnl * the GNU General Public License as published by the Free Software
+dnl Foundation; either version 2 of the License, or (at your option) any
+dnl later version.
+dnl
+dnl or both in parallel, as here.
+dnl
+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 General Public License
+dnl for more details.
+dnl
+dnl You should have received copies of the GNU General Public License and the
+dnl GNU Lesser General Public License along with the GNU MP Library. If not,
+dnl see https://www.gnu.org/licenses/.
+
+include(`../config.m4')
+
+
+C cycles/limb startup (approx)
+C P5 1.0 40
+C P6 2.4 70
+C K6 1.0 55
+C K7 1.3 75
+C P4 2.6 175
+C
+C (Startup time includes some function call overheads.)
+
+
+C void mpn_copyd (mp_ptr dst, mp_srcptr src, mp_size_t size);
+C
+C Copy src,size to dst,size, working from high to low addresses.
+C
+C The code here is very generic and can be expected to be reasonable on all
+C the x86 family.
+
+defframe(PARAM_SIZE,12)
+defframe(PARAM_SRC, 8)
+defframe(PARAM_DST, 4)
+deflit(`FRAME',0)
+
+ TEXT
+ ALIGN(32)
+
+PROLOGUE(mpn_copyd)
+ C eax saved esi
+ C ebx
+ C ecx counter
+ C edx saved edi
+ C esi src
+ C edi dst
+ C ebp
+
+ movl PARAM_SIZE, %ecx
+ movl %esi, %eax
+
+ movl PARAM_SRC, %esi
+ movl %edi, %edx
+
+ movl PARAM_DST, %edi
+ leal -4(%esi,%ecx,4), %esi
+
+ leal -4(%edi,%ecx,4), %edi
+
+ std
+
+ rep
+ movsl
+
+ cld
+
+ movl %eax, %esi
+ movl %edx, %edi
+
+ ret
+
+EPILOGUE()