globalDefinitions_xlc.hpp revision 12703:a06c552214ed 
1/*
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4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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8 * published by the Free Software Foundation.
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11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
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25
26#ifndef SHARE_VM_UTILITIES_GLOBALDEFINITIONS_XLC_HPP
27#define SHARE_VM_UTILITIES_GLOBALDEFINITIONS_XLC_HPP
28
29#include "prims/jni.h"
30
31// This file holds compiler-dependent includes,
32// globally used constants & types, class (forward)
33// declarations and a few frequently used utility functions.
34
35#include <ctype.h>
36#include <string.h>
37#include <stdarg.h>
38#include <stddef.h>
39#include <stdio.h>
40#include <stdlib.h>
41#include <wchar.h>
42
43#include <math.h>
44#include <time.h>
45#include <fcntl.h>
46#include <dlfcn.h>
47#include <pthread.h>
48
49#include <limits.h>
50#include <errno.h>
51
52#include <stdint.h>
53
54// Use XLC compiler builtins instead of inline assembler
55#define USE_XLC_BUILTINS
56#ifdef USE_XLC_BUILTINS
57#include <builtins.h>
58  #if __IBMCPP__ < 1000
59  // the funtion prototype for __dcbtst(void *) is missing in XLC V8.0
60  // I could compile a little test, where I provided the prototype.
61  // The generated code was correct there. This is the prototype:
62  // extern "builtin" void __dcbtst (void *);
63  // For now we don't make use of it when compiling with XLC V8.0
64  #else
65  // __IBMCPP__ >= 1000
66  // XLC V10 provides the prototype for __dcbtst (void *);
67  #define USE_XLC_PREFETCH_WRITE_BUILTIN
68  #endif
69#endif // USE_XLC_BUILTINS
70
71// NULL vs NULL_WORD:
72// On Linux NULL is defined as a special type '__null'. Assigning __null to
73// integer variable will cause gcc warning. Use NULL_WORD in places where a
74// pointer is stored as integer value.  On some platforms, sizeof(intptr_t) >
75// sizeof(void*), so here we want something which is integer type, but has the
76// same size as a pointer.
77#ifdef __GNUC__
78  #error XLC and __GNUC__?
79#else
80  #define NULL_WORD  NULL
81#endif
82
83// AIX also needs a 64 bit NULL to work as a null address pointer.
84// Most system includes on AIX would define it as an int 0 if not already defined with one
85// exception: /usr/include/dirent.h will unconditionally redefine NULL to int 0 again.
86// In this case you need to copy the following defines to a position after #include <dirent.h>
87// (see jmv_aix.h).
88#ifdef AIX
89  #ifdef _LP64
90    #undef NULL
91    #define NULL 0L
92  #else
93    #ifndef NULL
94      #define NULL 0
95    #endif
96  #endif
97#endif // AIX
98
99// Compiler-specific primitive types
100// All defs of int (uint16_6 etc) are defined in AIX' /usr/include/stdint.h
101
102// Additional Java basic types
103
104typedef uint8_t  jubyte;
105typedef uint16_t jushort;
106typedef uint32_t juint;
107typedef uint64_t julong;
108
109
110//----------------------------------------------------------------------------------------------------
111// Debugging
112
113#define DEBUG_EXCEPTION ::abort();
114
115extern "C" void breakpoint();
116#define BREAKPOINT ::breakpoint()
117
118// checking for nanness
119#ifdef AIX
120inline int g_isnan(float  f) { return isnan(f); }
121inline int g_isnan(double f) { return isnan(f); }
122#else
123#error "missing platform-specific definition here"
124#endif
125
126// Checking for finiteness
127
128inline int g_isfinite(jfloat  f)                 { return finite(f); }
129inline int g_isfinite(jdouble f)                 { return finite(f); }
130
131
132// Wide characters
133
134inline int wcslen(const jchar* x) { return wcslen((const wchar_t*)x); }
135
136
137// Portability macros
138#define PRAGMA_INTERFACE             #pragma interface
139#define PRAGMA_IMPLEMENTATION        #pragma implementation
140#define VALUE_OBJ_CLASS_SPEC
141
142// Formatting.
143#ifdef _LP64
144#define FORMAT64_MODIFIER "l"
145#else // !_LP64
146#define FORMAT64_MODIFIER "ll"
147#endif // _LP64
148
149// Cannot use xlc's offsetof as implementation of hotspot's
150// offset_of(), because xlc warns about applying offsetof() to non-POD
151// object and xlc cannot compile the expression offsetof(DataLayout,
152// _cells[index]) in DataLayout::cell_offset() .  Therefore we define
153// offset_of as it is defined for gcc.
154#define offset_of(klass,field) (size_t)((intx)&(((klass*)16)->field) - 16)
155
156// AIX 5.3 has buggy __thread support. (see JDK-8176442).
157#define USE_LIBRARY_BASED_TLS_ONLY 1
158
159#ifndef USE_LIBRARY_BASED_TLS_ONLY
160#define THREAD_LOCAL_DECL __thread
161#endif
162
163// Inlining support
164#define NOINLINE
165#define ALWAYSINLINE inline __attribute__((always_inline))
166
167#endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_XLC_HPP
168