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diff --git a/Build/source/libs/gmp/gmp-6.0.0/mpn/x86/lshift.asm b/Build/source/libs/gmp/gmp-6.0.0/mpn/x86/lshift.asm
new file mode 100644
index 00000000000..6ee6153cc28
--- /dev/null
+++ b/Build/source/libs/gmp/gmp-6.0.0/mpn/x86/lshift.asm
@@ -0,0 +1,106 @@
+dnl x86 mpn_lshift -- mpn left shift.
+
+dnl Copyright 1992, 1994, 1996, 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
+C P54 7.5
+C P55 7.0
+C P6 2.5
+C K6 4.5
+C K7 5.0
+C P4 14.5
+
+
+C mp_limb_t mpn_lshift (mp_ptr dst, mp_srcptr src, mp_size_t size,
+C unsigned shift);
+
+defframe(PARAM_SHIFT,16)
+defframe(PARAM_SIZE, 12)
+defframe(PARAM_SRC, 8)
+defframe(PARAM_DST, 4)
+
+ TEXT
+ ALIGN(8)
+PROLOGUE(mpn_lshift)
+
+ pushl %edi
+ pushl %esi
+ pushl %ebx
+deflit(`FRAME',12)
+
+ movl PARAM_DST,%edi
+ movl PARAM_SRC,%esi
+ movl PARAM_SIZE,%edx
+ movl PARAM_SHIFT,%ecx
+
+ subl $4,%esi C adjust src
+
+ movl (%esi,%edx,4),%ebx C read most significant limb
+ xorl %eax,%eax
+ shldl( %cl, %ebx, %eax) C compute carry limb
+ decl %edx
+ jz L(end)
+ pushl %eax C push carry limb onto stack
+ testb $1,%dl
+ jnz L(1) C enter loop in the middle
+ movl %ebx,%eax
+
+ ALIGN(8)
+L(oop): movl (%esi,%edx,4),%ebx C load next lower limb
+ shldl( %cl, %ebx, %eax) C compute result limb
+ movl %eax,(%edi,%edx,4) C store it
+ decl %edx
+L(1): movl (%esi,%edx,4),%eax
+ shldl( %cl, %eax, %ebx)
+ movl %ebx,(%edi,%edx,4)
+ decl %edx
+ jnz L(oop)
+
+ shll %cl,%eax C compute least significant limb
+ movl %eax,(%edi) C store it
+
+ popl %eax C pop carry limb
+
+ popl %ebx
+ popl %esi
+ popl %edi
+ ret
+
+L(end): shll %cl,%ebx C compute least significant limb
+ movl %ebx,(%edi) C store it
+
+ popl %ebx
+ popl %esi
+ popl %edi
+ ret
+
+EPILOGUE()