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macros-x86_64.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_MACHINE_MACROS_H
23 #define _QORE_MACHINE_MACROS_H
24
25 #define STACK_DIRECTION_DOWN 1
26
27 #ifdef __GNUC__
28
29 #define HAVE_ATOMIC_MACROS
30 #define HAVE_CHECK_STACK_POS
31
32 // returns 1 when counter reaches zero, 0 if not
33 static inline int atomic_dec(volatile int *a) {
34 unsigned char rc;
35
36 __asm(
37 "lock; decl %0; sete %1"
38 : "=m" (*a), "=qm" (rc)
39 : "m" (*a) : "memory"
40 );
41 return rc != 0;
42 }
43
44 static inline void atomic_inc(volatile int *a) {
45 __asm(
46 "lock; incl %0"
47 : "=m" (*a)
48 );
49 }
50
51 static inline size_t get_stack_pos() {
52 size_t addr;
53 __asm("movq %%rsp, %0" : "=g" (addr) );
54 return addr;
55 }
56
57 #endif // #ifdef __GNUC__
58
59 #ifdef __SUNPRO_CC
60
61 #define HAVE_ATOMIC_MACROS
62 #define HAVE_CHECK_STACK_POS
63
64 // these routines are implemented in assembler
65 extern "C" int atomic_dec(volatile int *a);
66 extern "C" void atomic_inc(volatile int *a);
67
68 extern "C" size_t get_stack_pos();
69
70 #endif // #ifdef __SUNPRO_CC
71
72 #endif // #ifndef _QORE_MACHINE_MACROS_H
73