aboutsummaryrefslogtreecommitdiffstats
path: root/contrib/libgmp/mpn/sparc64/sub_n.s
diff options
context:
space:
mode:
Diffstat (limited to 'contrib/libgmp/mpn/sparc64/sub_n.s')
-rw-r--r--contrib/libgmp/mpn/sparc64/sub_n.s58
1 files changed, 58 insertions, 0 deletions
diff --git a/contrib/libgmp/mpn/sparc64/sub_n.s b/contrib/libgmp/mpn/sparc64/sub_n.s
new file mode 100644
index 000000000000..d4842b8cdde3
--- /dev/null
+++ b/contrib/libgmp/mpn/sparc64/sub_n.s
@@ -0,0 +1,58 @@
+! SPARC v9 __mpn_sub_n -- Subtract two limb vectors of the same length > 0 and
+! store difference in a third limb vector.
+
+! Copyright (C) 1995, 1996 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 %o0
+! s1_ptr %o1
+! s2_ptr %o2
+! size %o3
+
+.section ".text"
+ .align 4
+ .global __mpn_sub_n
+ .type __mpn_sub_n,#function
+ .proc 04
+__mpn_sub_n:
+ sub %g0,%o3,%g3
+ sllx %o3,3,%g1
+ add %o1,%g1,%o1 ! make s1_ptr point at end
+ add %o2,%g1,%o2 ! make s2_ptr point at end
+ add %o0,%g1,%o0 ! make res_ptr point at end
+ mov 0,%o4 ! clear carry variable
+ sllx %g3,3,%o5 ! compute initial address index
+
+.Loop: ldx [%o2+%o5],%g1 ! load s2 limb
+ add %g3,1,%g3 ! increment loop count
+ ldx [%o1+%o5],%g2 ! load s1 limb
+ addcc %g1,%o4,%g1 ! add s2 limb and carry variable
+ movcc %xcc,0,%o4 ! if carry-out, o4 was 1; clear it
+ subcc %g1,%g2,%g1 ! subtract s1 limb from sum
+ stx %g1,[%o0+%o5] ! store result
+ add %o5,8,%o5 ! increment address index
+ brnz,pt %g3,.Loop
+ movcs %xcc,1,%o4 ! if s1 subtract gave carry, record it
+
+ retl
+ mov %o4,%o0
+.LLfe1:
+ .size __mpn_sub_n,.LLfe1-__mpn_sub_n