1 /*
   2  * Copyright (c) 1998, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * Copyright 2012, 2013 SAP AG. All rights reserved.
   4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 only, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  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).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  *
  24  */
  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 
 104 typedef uint8_t  jubyte;
 105 typedef uint16_t jushort;
 106 typedef uint32_t juint;
 107 typedef uint64_t julong;
 108 
 109 
 110 //----------------------------------------------------------------------------------------------------
 111 // Constant for jlong (specifying an long long canstant is C++ compiler specific)
 112 
 113 // Build a 64bit integer constant
 114 #define CONST64(x)  (x ## LL)
 115 #define UCONST64(x) (x ## ULL)
 116 
 117 const jlong min_jlong = CONST64(0x8000000000000000);
 118 const jlong max_jlong = CONST64(0x7fffffffffffffff);
 119 
 120 //----------------------------------------------------------------------------------------------------
 121 // Debugging
 122 
 123 #define DEBUG_EXCEPTION ::abort();
 124 
 125 extern "C" void breakpoint();
 126 #define BREAKPOINT ::breakpoint()
 127 
 128 // checking for nanness
 129 #ifdef AIX
 130 inline int g_isnan(float  f) { return isnan(f); }
 131 inline int g_isnan(double f) { return isnan(f); }
 132 #else
 133 #error "missing platform-specific definition here"
 134 #endif
 135 
 136 // Checking for finiteness
 137 
 138 inline int g_isfinite(jfloat  f)                 { return finite(f); }
 139 inline int g_isfinite(jdouble f)                 { return finite(f); }
 140 
 141 
 142 // Wide characters
 143 
 144 inline int wcslen(const jchar* x) { return wcslen((const wchar_t*)x); }
 145 
 146 
 147 // Portability macros
 148 #define PRAGMA_INTERFACE             #pragma interface
 149 #define PRAGMA_IMPLEMENTATION        #pragma implementation
 150 #define VALUE_OBJ_CLASS_SPEC
 151 
 152 // Formatting.
 153 #ifdef _LP64
 154 #define FORMAT64_MODIFIER "l"
 155 #else // !_LP64
 156 #define FORMAT64_MODIFIER "ll"
 157 #endif // _LP64
 158 
 159 // Cannot use xlc's offsetof as implementation of hotspot's
 160 // offset_of(), because xlc warns about applying offsetof() to non-POD
 161 // object and xlc cannot compile the expression offsetof(DataLayout,
 162 // _cells[index]) in DataLayout::cell_offset() .  Therefore we define
 163 // offset_of as it is defined for gcc.
 164 #define offset_of(klass,field) (size_t)((intx)&(((klass*)16)->field) - 16)
 165 
 166 // Some constant sizes used throughout the AIX port
 167 #define SIZE_1K   ((uint64_t) UCONST64(        0x400))
 168 #define SIZE_4K   ((uint64_t) UCONST64(       0x1000))
 169 #define SIZE_64K  ((uint64_t) UCONST64(      0x10000))
 170 #define SIZE_1M   ((uint64_t) UCONST64(     0x100000))
 171 #define SIZE_4M   ((uint64_t) UCONST64(     0x400000))
 172 #define SIZE_8M   ((uint64_t) UCONST64(     0x800000))
 173 #define SIZE_16M  ((uint64_t) UCONST64(    0x1000000))
 174 #define SIZE_256M ((uint64_t) UCONST64(   0x10000000))
 175 #define SIZE_1G   ((uint64_t) UCONST64(   0x40000000))
 176 #define SIZE_2G   ((uint64_t) UCONST64(   0x80000000))
 177 #define SIZE_4G   ((uint64_t) UCONST64(  0x100000000))
 178 #define SIZE_16G  ((uint64_t) UCONST64(  0x400000000))
 179 #define SIZE_32G  ((uint64_t) UCONST64(  0x800000000))
 180 #define SIZE_64G  ((uint64_t) UCONST64( 0x1000000000))
 181 #define SIZE_1T   ((uint64_t) UCONST64(0x10000000000))
 182 
 183 
 184 #endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_XLC_HPP