From 28f540f45bbacd939bfd07f213bcad2bf730b1bf Mon Sep 17 00:00:00 2001
From: Roland McGrath <roland@gnu.org>
Date: Sat, 18 Feb 1995 01:27:10 +0000
Subject: initial import

---
 sysdeps/sparc/add_n.S | 134 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 sysdeps/sparc/add_n.S

(limited to 'sysdeps/sparc/add_n.S')

diff --git a/sysdeps/sparc/add_n.S b/sysdeps/sparc/add_n.S
new file mode 100644
index 0000000000..3be3e39b86
--- /dev/null
+++ b/sysdeps/sparc/add_n.S
@@ -0,0 +1,134 @@
+! sparc __mpn_add_n -- Add two limb vectors of the same length > 0 and store
+! sum in a third limb vector.
+
+! Copyright (C) 1992, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+
+! INPUT PARAMETERS
+! res_ptr	%o0
+! s1_ptr	%o1
+! s2_ptr	%o2
+! size		%o3
+
+#include "sysdep.h"
+
+	.text
+	.align	4
+	.global	C_SYMBOL_NAME(__mpn_add_n)
+C_SYMBOL_NAME(__mpn_add_n):
+	ld	[%o1+0],%o4		! read first limb from s1_ptr
+	srl	%o3,4,%g1
+	ld	[%o2+0],%o5		! read first limb from s2_ptr
+
+	sub	%g0,%o3,%o3
+	andcc	%o3,(16-1),%o3
+	be	Lzero
+	 nop
+
+	sll	%o3,2,%o3		! multiply by 4
+	sub	%o0,%o3,%o0		! adjust res_ptr
+	sub	%o1,%o3,%o1		! adjust s1_ptr
+	sub	%o2,%o3,%o2		! adjust s2_ptr
+
+	mov	%o4,%g2
+
+	sethi	%hi(Lbase),%g3
+	or	%g3,%lo(Lbase),%g3
+	sll	%o3,2,%o3		! multiply by 4
+	jmp	%g3+%o3
+	 mov	%o5,%g3
+
+Loop:	addxcc	%g2,%g3,%o3
+	add	%o1,64,%o1
+	st	%o3,[%o0+60]
+	add	%o2,64,%o2
+	ld	[%o1+0],%o4
+	add	%o0,64,%o0
+	ld	[%o2+0],%o5
+Lzero:	sub	%g1,1,%g1	! add 0 + 16r limbs (adjust loop counter)
+Lbase:	ld	[%o1+4],%g2
+	addxcc	%o4,%o5,%o3
+	ld	[%o2+4],%g3
+	st	%o3,[%o0+0]
+	ld	[%o1+8],%o4	! add 15 + 16r limbs
+	addxcc	%g2,%g3,%o3
+	ld	[%o2+8],%o5
+	st	%o3,[%o0+4]
+	ld	[%o1+12],%g2	! add 14 + 16r limbs
+	addxcc	%o4,%o5,%o3
+	ld	[%o2+12],%g3
+	st	%o3,[%o0+8]
+	ld	[%o1+16],%o4	! add 13 + 16r limbs
+	addxcc	%g2,%g3,%o3
+	ld	[%o2+16],%o5
+	st	%o3,[%o0+12]
+	ld	[%o1+20],%g2	! add 12 + 16r limbs
+	addxcc	%o4,%o5,%o3
+	ld	[%o2+20],%g3
+	st	%o3,[%o0+16]
+	ld	[%o1+24],%o4	! add 11 + 16r limbs
+	addxcc	%g2,%g3,%o3
+	ld	[%o2+24],%o5
+	st	%o3,[%o0+20]
+	ld	[%o1+28],%g2	! add 10 + 16r limbs
+	addxcc	%o4,%o5,%o3
+	ld	[%o2+28],%g3
+	st	%o3,[%o0+24]
+	ld	[%o1+32],%o4	! add 9 + 16r limbs
+	addxcc	%g2,%g3,%o3
+	ld	[%o2+32],%o5
+	st	%o3,[%o0+28]
+	ld	[%o1+36],%g2	! add 8 + 16r limbs
+	addxcc	%o4,%o5,%o3
+	ld	[%o2+36],%g3
+	st	%o3,[%o0+32]
+	ld	[%o1+40],%o4	! add 7 + 16r limbs
+	addxcc	%g2,%g3,%o3
+	ld	[%o2+40],%o5
+	st	%o3,[%o0+36]
+	ld	[%o1+44],%g2	! add 6 + 16r limbs
+	addxcc	%o4,%o5,%o3
+	ld	[%o2+44],%g3
+	st	%o3,[%o0+40]
+	ld	[%o1+48],%o4	! add 5 + 16r limbs
+	addxcc	%g2,%g3,%o3
+	ld	[%o2+48],%o5
+	st	%o3,[%o0+44]
+	ld	[%o1+52],%g2	! add 4 + 16r limbs
+	addxcc	%o4,%o5,%o3
+	ld	[%o2+52],%g3
+	st	%o3,[%o0+48]
+	ld	[%o1+56],%o4	! add 3 + 16r limbs
+	addxcc	%g2,%g3,%o3
+	ld	[%o2+56],%o5
+	st	%o3,[%o0+52]
+	ld	[%o1+60],%g2	! add 2 + 16r limbs
+	addxcc	%o4,%o5,%o3
+	ld	[%o2+60],%g3
+	st	%o3,[%o0+56]
+	addx	%g0,%g0,%o4
+	tst	%g1
+	bne	Loop
+	 subcc	%g0,%o4,%g0	! restore cy (delay slot)
+
+	addxcc	%g2,%g3,%o3
+	st	%o3,[%o0+60]	! store most significant limb
+
+	retl
+	 addx	%g0,%g0,%o0	! return carry-out from most sign. limb
-- 
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