[PATCH 3/3] Optimize 64-bit mpn_add_N and mpn_sub_N for sparc T3 and later.

[David Miller]

	* mpn/sparc64/ultrasparct3/add_n.asm: New file.
	* mpn/sparc64/ultrasparct3/sub_n.asm: New file.
---

diff --git a/mpn/sparc64/ultrasparct3/add_n.asm b/mpn/sparc64/ultrasparct3/add_n.asm
new file mode 100644
index 0000000..16bd0c4
--- /dev/null
+++ b/mpn/sparc64/ultrasparct3/add_n.asm
@@ -0,0 +1,73 @@
+dnl  SPARC v9 mpn_add_n for T3/T4.
+
+dnl  Copyright 2013 Free Software Foundation, Inc.
+
+dnl  This file is part of the GNU MP Library.
+
+dnl  The GNU MP Library is free software; you can redistribute it and/or modify
+dnl  it under the terms of the GNU Lesser General Public License as published
+dnl  by the Free Software Foundation; either version 3 of the License, or (at
+dnl  your option) any later version.
+
+dnl  The GNU MP Library is distributed in the hope that it will be useful, but
+dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+dnl  License for more details.
+
+dnl  You should have received a copy of the GNU Lesser General Public License
+dnl  along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.
+
+include(`../config.m4')
+
+C		   cycles/limb
+C UltraSPARC T3:	 9
+C UltraSPARC T4:	 3.5
+
+C INPUT PARAMETERS
+define(`rp', `%o0')
+define(`up', `%o1')
+define(`vp', `%o2')
+define(`n',  `%o3')
+define(`cy', `%o4')
+
+ASM_START()
+	REGISTER(%g2,#scratch)
+	REGISTER(%g3,#scratch)
+	ALIGN(32)
+PROLOGUE(mpn_add_nc)
+	b,a	L(ent)
+EPILOGUE()
+PROLOGUE(mpn_add_n)
+	mov	0, cy
+L(ent):
+	subcc	n, 1, n
+	be	L(final_one)
+	 cmp	%g0, cy
+L(top):
+	ldx	[up+0], %o4
+	add	up, 16, up
+	ldx	[vp+0], %o5
+	add	vp, 16, vp
+	ldx	[up-8], %g1
+	add	rp, 16, rp
+	ldx	[vp-8], %g2
+	sub	n, 2, n
+	addxccc	%o4, %o5, %g3
+	stx	%g3, [rp-16]
+	addxccc	%g1, %g2, %g2
+	brgz	n, L(top)
+	 stx	%g2, [rp-8]
+
+	brlz,pt	n, L(done)
+	 nop
+
+L(final_one):
+	ldx	[up+0], %o4
+	ldx	[vp+0], %o5
+	addxccc	%o4, %o5, %g3
+	stx	%g3, [rp+0]
+
+L(done):
+	retl
+	 addxc	%g0, %g0, %o0
+EPILOGUE()
diff --git a/mpn/sparc64/ultrasparct3/sub_n.asm b/mpn/sparc64/ultrasparct3/sub_n.asm
new file mode 100644
index 0000000..7ac290a
--- /dev/null
+++ b/mpn/sparc64/ultrasparct3/sub_n.asm
@@ -0,0 +1,77 @@
+dnl  SPARC v9 mpn_sub_n for T3/T4.
+
+dnl  Copyright 2013 Free Software Foundation, Inc.
+
+dnl  This file is part of the GNU MP Library.
+
+dnl  The GNU MP Library is free software; you can redistribute it and/or modify
+dnl  it under the terms of the GNU Lesser General Public License as published
+dnl  by the Free Software Foundation; either version 3 of the License, or (at
+dnl  your option) any later version.
+
+dnl  The GNU MP Library is distributed in the hope that it will be useful, but
+dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
+dnl  License for more details.
+
+dnl  You should have received a copy of the GNU Lesser General Public License
+dnl  along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.
+
+include(`../config.m4')
+
+C		   cycles/limb
+C UltraSPARC T3:	 10
+C UltraSPARC T4:	 4
+
+C INPUT PARAMETERS
+define(`rp', `%o0')
+define(`up', `%o1')
+define(`vp', `%o2')
+define(`n',  `%o3')
+define(`cy', `%o4')
+
+ASM_START()
+	REGISTER(%g2,#scratch)
+	REGISTER(%g3,#scratch)
+PROLOGUE(mpn_sub_nc)
+	ba,pt	%xcc, L(ent)
+	 xor	cy, 1, cy
+EPILOGUE()
+PROLOGUE(mpn_sub_n)
+	mov	1, cy
+L(ent):
+	subcc	n, 1, n
+	be	L(final_one)
+	 cmp	%g0, cy
+L(top):
+	ldx	[vp+0], %o5
+	add	vp, 16, vp
+	ldx	[up+0], %o4
+	add	up, 16, up
+	ldx	[vp-8], %g2
+	sub	n, 2, n
+	ldx	[up-8], %g1
+	add	rp, 16, rp
+	xnor	%o5, %g0, %o5
+	addxccc	%o4, %o5, %g3
+	stx	%g3, [rp-16]
+	xnor	%g2, %g0, %g2
+	addxccc	%g1, %g2, %g2
+	brgz	n, L(top)
+	 stx	%g2, [rp-8]
+
+	brlz,pt	n, L(done)
+	 nop
+
+L(final_one):
+	ldx	[up+0], %o4
+	ldx	[vp+0], %o5
+	xnor	%o5, %g0, %o5
+	addxccc	%o4, %o5, %g3
+	stx	%g3, [rp+0]
+
+L(done):
+	clr	%o0
+	retl
+	 movcc	%xcc, 1, %o0
+EPILOGUE()
-- 
1.8.1.2