1dnl  ARM mpn_com.
2
3dnl  Copyright 2003, 2012 Free Software Foundation, Inc.
4
5dnl  This file is part of the GNU MP Library.
6dnl
7dnl  The GNU MP Library is free software; you can redistribute it and/or modify
8dnl  it under the terms of either:
9dnl
10dnl    * the GNU Lesser General Public License as published by the Free
11dnl      Software Foundation; either version 3 of the License, or (at your
12dnl      option) any later version.
13dnl
14dnl  or
15dnl
16dnl    * the GNU General Public License as published by the Free Software
17dnl      Foundation; either version 2 of the License, or (at your option) any
18dnl      later version.
19dnl
20dnl  or both in parallel, as here.
21dnl
22dnl  The GNU MP Library is distributed in the hope that it will be useful, but
23dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
24dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
25dnl  for more details.
26dnl
27dnl  You should have received copies of the GNU General Public License and the
28dnl  GNU Lesser General Public License along with the GNU MP Library.  If not,
29dnl  see https://www.gnu.org/licenses/.
30
31include(`../config.m4')
32
33C	     cycles/limb
34C StrongARM	 ?
35C XScale	 ?
36C Cortex-A7	 ?
37C Cortex-A8	 ?
38C Cortex-A9	 2.0
39C Cortex-A15	 1.75
40
41define(`rp', `r0')
42define(`up', `r1')
43define(`n',  `r2')
44
45ASM_START()
46PROLOGUE(mpn_com)
47	tst	n, #1
48	beq	L(skip1)
49	ldr	r3, [up], #4
50	mvn	r3, r3
51	str	r3, [rp], #4
52L(skip1):
53	tst	n, #2
54	beq	L(skip2)
55	ldmia	up!, { r3, r12 }		C load 2 limbs
56	mvn	r3, r3
57	mvn	r12, r12
58	stmia	rp!, { r3, r12 }		C store 2 limbs
59L(skip2):
60	bics	n, n, #3
61	beq	L(rtn)
62	stmfd	sp!, { r7, r8, r9 }		C save regs on stack
63
64L(top):	ldmia	up!, { r3, r8, r9, r12 }	C load 4 limbs
65	subs	n, n, #4
66	mvn	r3, r3
67	mvn	r8, r8
68	mvn	r9, r9
69	mvn	r12, r12
70	stmia	rp!, { r3, r8, r9, r12 }	C store 4 limbs
71	bne	L(top)
72
73	ldmfd	sp!, { r7, r8, r9 }		C restore regs from stack
74L(rtn):	return	lr
75EPILOGUE()
76