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diff --git a/Build/source/libs/gmp/gmp-6.0.0/mpn/sparc64/ultrasparct1/sub_n.asm b/Build/source/libs/gmp/gmp-6.0.0/mpn/sparc64/ultrasparct1/sub_n.asm
new file mode 100644
index 00000000000..c2af89f08f9
--- /dev/null
+++ b/Build/source/libs/gmp/gmp-6.0.0/mpn/sparc64/ultrasparct1/sub_n.asm
@@ -0,0 +1,68 @@
+dnl SPARC v9 mpn_sub_n for T1/T2.
+
+dnl Copyright 2010 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 UltraSPARC T1: ?
+C UltraSPARC T2: ?
+
+C INPUT PARAMETERS
+define(`rp', `%o0')
+define(`up', `%o1')
+define(`vp', `%o2')
+define(`n', `%o3')
+define(`cy', `%o4')
+
+ASM_START()
+ REGISTER(%g2,#scratch)
+ REGISTER(%g3,#scratch)
+PROLOGUE(mpn_sub_nc)
+ b,a L(ent)
+EPILOGUE()
+PROLOGUE(mpn_sub_n)
+ mov 0, cy
+L(ent): cmp %g0, cy
+L(top): ldx [up+0], %o4
+ add up, 8, up
+ ldx [vp+0], %o5
+ add vp, 8, vp
+ add rp, 8, rp
+ add n, -1, n
+ srlx %o4, 32, %g1
+ srlx %o5, 32, %g2
+ subccc %o4, %o5, %g3
+ subccc %g1, %g2, %g0
+ brgz n, L(top)
+ stx %g3, [rp-8]
+
+ retl
+ addc %g0, %g0, %o0
+EPILOGUE()