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diff --git a/Build/source/libs/gmp/gmp-6.0.0/mpn/x86/pentium4/sse2/addlsh1_n.asm b/Build/source/libs/gmp/gmp-6.0.0/mpn/x86/pentium4/sse2/addlsh1_n.asm
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index 00000000000..93b63b2018d
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+++ b/Build/source/libs/gmp/gmp-6.0.0/mpn/x86/pentium4/sse2/addlsh1_n.asm
@@ -0,0 +1,108 @@
+dnl Intel Pentium-4 mpn_addlsh1_n -- mpn x+2*y.
+
+dnl Copyright 2001-2004, 2006 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 dst!=src1,2 dst==src1 dst==src2
+C P6 model 0-8,10-12 -
+C P6 model 9 (Banias) ?
+C P6 model 13 (Dothan) ?
+C P4 model 0-1 (Willamette) ?
+C P4 model 2 (Northwood) 4.25 6 6
+C P4 model 3-4 (Prescott) 5 8.5 8.5
+
+C The slightly strange combination of indexing and pointer incrementing
+C that's used seems to work best. Not sure why, but %ecx,4 with src1 and/or
+C src2 is a slowdown.
+C
+C The dependent chain is simply the paddq of x+2*y to the previous carry,
+C then psrlq to get the new carry. That makes 4 c/l the target speed, which
+C is almost achieved for separate src/dst but when src==dst the write
+C combining anomalies slow it down.
+
+defframe(PARAM_SIZE, 16)
+defframe(PARAM_SRC2, 12)
+defframe(PARAM_SRC1, 8)
+defframe(PARAM_DST, 4)
+
+dnl re-use parameter space
+define(SAVE_EBX,`PARAM_SRC1')
+
+ TEXT
+ ALIGN(8)
+
+PROLOGUE(mpn_addlsh1_n)
+deflit(`FRAME',0)
+
+ mov PARAM_SRC1, %eax
+ mov %ebx, SAVE_EBX
+
+ mov PARAM_SRC2, %ebx
+ pxor %mm0, %mm0 C initial carry
+
+ mov PARAM_DST, %edx
+
+ mov PARAM_SIZE, %ecx
+
+ lea (%edx,%ecx,4), %edx C dst end
+ neg %ecx C -size
+
+L(top):
+ C eax src1 end
+ C ebx src2 end
+ C ecx counter, limbs, negative
+ C edx dst end
+ C mm0 carry
+
+ movd (%ebx), %mm2
+ movd (%eax), %mm1
+ psrlq $32, %mm0
+ lea 4(%eax), %eax
+ lea 4(%ebx), %ebx
+
+ psllq $1, %mm2
+ paddq %mm2, %mm1
+
+ paddq %mm1, %mm0
+
+ movd %mm0, (%edx,%ecx,4)
+ add $1, %ecx
+ jnz L(top)
+
+
+ psrlq $32, %mm0
+ mov SAVE_EBX, %ebx
+ movd %mm0, %eax
+ emms
+ ret
+
+EPILOGUE()