1dnl  ARM mpn_copyi.
2
3dnl  Copyright 2003 Free Software Foundation, Inc.
4
5dnl  This file is part of the GNU MP Library.
6
7dnl  The GNU MP Library is free software; you can redistribute it and/or modify
8dnl  it under the terms of the GNU Lesser General Public License as published
9dnl  by the Free Software Foundation; either version 3 of the License, or (at
10dnl  your option) any later version.
11
12dnl  The GNU MP Library is distributed in the hope that it will be useful, but
13dnl  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14dnl  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
15dnl  License for more details.
16
17dnl  You should have received a copy of the GNU Lesser General Public License
18dnl  along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.
19
20include(`../config.m4')
21
22C This runs at 3 cycles/limb in the StrongARM.
23
24define(`rp',`r0')
25define(`up',`r1')
26define(`n',`r2')
27
28
29ASM_START()
30PROLOGUE(mpn_copyi)
31	tst	n, #1
32	beq	L(skip1)
33	ldr	r3, [up], #4
34	str	r3, [rp], #4
35L(skip1):
36	tst	n, #2
37	beq	L(skip2)
38	ldmia	up!, { r3, r12 }		C load 2 limbs
39	stmia	rp!, { r3, r12 }		C store 2 limbs
40L(skip2):
41	bics	n, n, #3
42	beq	L(return)
43	stmfd	sp!, { r7, r8, r9 }		C save regs on stack
44L(loop):
45	ldmia	up!, { r3, r8, r9, r12 }	C load 4 limbs
46	ldr	r7, [rp, #12]			C cache allocate
47	subs	n, n, #4
48	stmia	rp!, { r3, r8, r9, r12 }	C store 4 limbs
49	bne	L(loop)
50	ldmfd	sp!, { r7, r8, r9 }		C restore regs from stack
51L(return):
52	mov	pc, lr
53EPILOGUE(mpn_copyi)
54