[project @ 1998-06-05 14:44:14 by simonm]

[ghc-hetmet.git] / ghc / rts / gmp / mpn / z8000x / add_n.s

diff --git a/ghc/rts/gmp/mpn/z8000x/add_n.s b/ghc/rts/gmp/mpn/z8000x/add_n.s
new file mode 100644 (file)
index 0000000..c5c0d42
--- /dev/null
+++ b/ghc/rts/gmp/mpn/z8000x/add_n.s
@@ -0,0 +1,56 @@
+! Z8000 (32 bit limb version) __mpn_add_n -- Add two limb vectors of equal,
+! non-zero length.
+
+! Copyright (C) 1993, 1994 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 Library General Public License as published by
+! the Free Software Foundation; either version 2 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 Library General Public
+! License for more details.
+
+! You should have received a copy of the GNU Library General Public License
+! along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
+! the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+! MA 02111-1307, USA.
+
+
+! 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...
+
+       segm
+       .text
+       even
+       global ___mpn_add_n
+___mpn_add_n:
+       popl    rr0,@r6
+       popl    rr8,@r5
+       addl    rr0,rr8
+       ldl     @r7,rr0
+       dec     r4
+       jr      eq,Lend
+Loop:  popl    rr0,@r6
+       popl    rr8,@r5
+       adc     r1,r9
+       adc     r0,r8
+       inc     r7,#4
+       ldl     @r7,rr0
+       dec     r4
+       jr      ne,Loop
+Lend:  ld      r2,r4           ! use 0 already in r4
+       ld      r3,r4
+       adc     r2,r2
+       ret     t