1dnl  PowerPC mftb_function -- read time base registers.
2
3dnl  Copyright 2002 Free Software Foundation, Inc.
4dnl
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
8dnl  modify it under the terms of the GNU Lesser General Public License as
9dnl  published by the Free Software Foundationn; either version 3 of the
10dnl  License, or (at your option) any later version.
11dnl
12dnl  The GNU MP Library is distributed in the hope that it will be useful,
13dnl  but WITHOUT ANY WARRANTY; without even the implied warranty of
14dnl  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15dnl  Lesser General Public License for more details.
16dnl
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
22
23C void mftb_function (unsigned a[2]);
24C
25
26ASM_START()
27PROLOGUE(mftb_function)
28
29	C r3	a
30
31L(again):
32	mftbu	r4
33	mftb	r5
34	mftbu	r6
35	cmpw	cr0, r4, r6
36	bne	L(again)
37
38	stw	r5, 0(r3)
39	stw	r4, 4(r3)
40	blr
41
42EPILOGUE()
43