Qore Programming Language 0.8.8

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macros-sparc.h
1 /* -*- mode: c++; indent-tabs-mode: nil -*- */
2 #ifndef _QORE_MACHINE_MACROS_H
3
4 #define _QORE_MACHINE_MACROS_H
5
6 // no atomic support or stack guard for 64-bit sparc yet
7 #if !defined(__sparcv9)
8
9 #define STACK_DIRECTION_DOWN 1
10
11 #ifdef __GNUC__
12
13 #define HAVE_ATOMIC_MACROS
14
15 // borrowed from boost
16 inline int compare_and_swap(int *dest_, int compare_, int swap_) {
17 __asm__ __volatile__( "cas %0, %2, %1"
18 : "+m" (*dest_), "+r" (swap_)
19 : "r" (compare_)
20 : "memory" );
21
22 return swap_;
23 }
24
25 inline int atomic_fetch_and_add(int * pw, int dv) {
26 for( ;; ) {
27 int r = *pw;
28
29 if (__builtin_expect((compare_and_swap(pw, r, r + dv) == r), 1)) {
30 return r;
31 }
32 }
33 }
34
35 static inline int atomic_dec(int *pw) {
36 return !atomic_fetch_and_add(pw, -1);
37 }
38
39 static inline void atomic_inc(int *pw) {
40 atomic_fetch_and_add(pw, 1);
41 }
42
43 #define HAVE_CHECK_STACK_POS
44
45 static inline size_t get_stack_pos() {
46 size_t addr;
47 __asm__("mov %%sp,%0" : "=r" (addr) );
48 return addr;
49 }
50
51 #endif
52
53 #ifdef __SUNPRO_CC
54 #define HAVE_ATOMIC_MACROS
55
56 // routines are implemented in assembler
57 extern "C" int atomic_dec(int *pw);
58 extern "C" void atomic_inc(int *pw);
59
60 #define HAVE_CHECK_STACK_POS
61
62 extern "C" size_t get_stack_pos();
63
64 #endif
65
66 #endif
67
68 #endif