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macros-powerpc.h
1 /* -*- mode: c++; indent-tabs-mode: nil -*- */
2 /*
3 Qore Programming Language
4
5 Copyright 2003 - 2013 David Nichols
6
7 This library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public
9 License as published by the Free Software Foundation; either
10 version 2.1 of the License, or (at your option) any later version.
11
12 This library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
16
17 You should have received a copy of the GNU Lesser General Public
18 License along with this library; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #ifndef _QORE_CONFIG_MACHINE_MACROS_H
23
24 #define _QORE_CONFIG_MACHINE_MACROS_H
25
26 // only have support for 32-bit ppc for now
27 #ifndef __ppc64
28
29 #define HAVE_ATOMIC_MACROS
30
31 static inline int atomic_inc(int *v)
32 {
33 int t;
34
35 asm volatile(
36 "1: lwarx %0,0,%1\n"
37 " addic %0,%0,1\n"
38 " stwcx. %0,0,%1\n"
39 " bne- 1b"
40 : "=&r" (t)
41 : "r" (v)
42 : "cc", "memory");
43 return t;
44 }
45
46 static inline int atomic_dec(int *v)
47 {
48 int t;
49
50 asm volatile(
51 "1: lwarx %0,0,%1\n"
52 " addic %0,%0,-1\n"
53 " stwcx. %0,0,%1\n"
54 " bne- 1b"
55 : "=&r" (t)
56 : "r" (v)
57 : "cc", "memory");
58 return !t;
59 }
60
61 #define HAVE_CHECK_STACK_POS
62 #define STACK_DIRECTION_DOWN 1
63
64 static inline size_t get_stack_pos() {
65 size_t addr;
66 __asm("mr %0, r1" : "=r" (addr) );
67 return addr;
68 }
69
70 #endif
71
72 #endif