glibc/sysdeps/sparc/sparc64/add_n.S
Ulrich Drepper 8cb079d41b Update.
* sysdeps/sparc/sparc64/add_n.S: Avoid using %g2, %g3, %g7 registers
	as much as possible. Declare them using .register pseudo-op if they
	are still used.
	* sysdeps/sparc/sparc64/lshift.S: Likewise.
	* sysdeps/sparc/sparc64/memchr.S: Likewise.
	* sysdeps/sparc/sparc64/memcmp.S: Likewise.
	* sysdeps/sparc/sparc64/memcpy.S: Likewise.
	* sysdeps/sparc/sparc64/memset.S: Likewise.
	* sysdeps/sparc/sparc64/rawmemchr.S: Likewise.
	* sysdeps/sparc/sparc64/rshift.S: Likewise.
	* sysdeps/sparc/sparc64/stpcpy.S: Likewise.
	* sysdeps/sparc/sparc64/stpncpy.S: Likewise.
	* sysdeps/sparc/sparc64/strcat.S: Likewise.
	* sysdeps/sparc/sparc64/strchr.S: Likewise.
	* sysdeps/sparc/sparc64/strcmp.S: Likewise.
	* sysdeps/sparc/sparc64/strcpy.S: Likewise.
	* sysdeps/sparc/sparc64/strcspn.S: Likewise.
	* sysdeps/sparc/sparc64/strlen.S: Likewise.
	* sysdeps/sparc/sparc64/strncmp.S: Likewise.
	* sysdeps/sparc/sparc64/strncpy.S: Likewise.
	* sysdeps/sparc/sparc64/strpbrk.S: Likewise.
	* sysdeps/sparc/sparc64/strspn.S: Likewise.
	* sysdeps/sparc/sparc64/sub_n.S: Likewise.
	* sysdeps/sparc/sparc64/dl-machine.h: Likewise.
	Optimize trampoline code for .plt4-.plt32767.
	Fix trampolines for .plt32768+.

1999-07-25  Jakub Jelinek  <jj@ultra.linux.cz>
1999-07-27 04:43:32 +00:00

59 lines
1.8 KiB
ArmAsm

/* SPARC v9 __mpn_add_n -- Add two limb vectors of the same length > 0 and
store sum in a third limb vector.
Copyright (C) 1995, 1996, 1997, 1999 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. */
#include <sysdep.h>
/* INPUT PARAMETERS
res_ptr %o0
s1_ptr %o1
s2_ptr %o2
size %o3 */
ENTRY(__mpn_add_n)
sub %g0,%o3,%g5
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 %g5,3,%o5 ! compute initial address index
1: ldx [%o2+%o5],%g1 ! load s2 limb
add %g5,1,%g5 ! increment loop count
ldx [%o1+%o5],%o3 ! 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
addcc %g1,%o3,%g1 ! add s1 limb to sum
stx %g1,[%o0+%o5] ! store result
add %o5,8,%o5 ! increment address index
brnz,pt %g5,1b
movcs %xcc,1,%o4 ! if s1 add gave carry, record it
retl
mov %o4,%o0
END(__mpn_add_n)