--- /dev/null
+! Z8000 __gmpn_sub_n -- Subtract two limb vectors of the same length > 0 and
+! store difference in a third limb vector.
+
+! Copyright 1993, 1994, 2000 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 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.
+
+! 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 Lesser General Public
+! License for more details.
+
+! You should have received a copy of the GNU Lesser General Public License
+! along with the GNU MP Library. If not, see http://www.gnu.org/licenses/.
+
+
+! INPUT PARAMETERS
+! res_ptr r7
+! s1_ptr r6
+! s2_ptr r5
+! size r4
+
+! If we are really crazy, we can use push to write a few result words
+! backwards, using push just because it is faster than reg+disp. We'd
+! then add 2x the number of words written to r7...
+
+ unseg
+ .text
+ even
+ global ___gmpn_sub_n
+___gmpn_sub_n:
+ pop r0,@r6
+ pop r1,@r5
+ sub r0,r1
+ ld @r7,r0
+ dec r4
+ jr eq,Lend
+Loop: pop r0,@r6
+ pop r1,@r5
+ sbc r0,r1
+ inc r7,#2
+ ld @r7,r0
+ dec r4
+ jr ne,Loop
+Lend: ld r2,r4 ! use 0 already in r4
+ adc r2,r2
+ ret t