1 /*
   2  * Copyright (c) 1998, 2013, 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 #ifndef FP_PZERO
  45 // Linux doesn't have positive/negative zero
  46 #define FP_PZERO FP_ZERO
  47 #endif
  48 #if (!defined fpclass)
  49 #define fpclass fpclassify
  50 #endif
  51 
  52 #include <time.h>
  53 #include <fcntl.h>
  54 #include <dlfcn.h>
  55 #include <pthread.h>
  56 
  57 #include <limits.h>
  58 #include <errno.h>
  59 
  60 #include <stdint.h>
  61 
  62 // Use XLC compiler builtins instead of inline assembler
  63 #define USE_XLC_BUILTINS
  64 #ifdef USE_XLC_BUILTINS
  65 #include <builtins.h>
  66   #if __IBMCPP__ < 1000
  67   // the funtion prototype for __dcbtst(void *) is missing in XLC V8.0
  68   // I could compile a little test, where I provided the prototype.
  69   // The generated code was correct there. This is the prototype:
  70   // extern "builtin" void __dcbtst (void *);
  71   // For now we don't make use of it when compiling with XLC V8.0
  72   #else
  73   // __IBMCPP__ >= 1000
  74   // XLC V10 provides the prototype for __dcbtst (void *);
  75   #define USE_XLC_PREFETCH_WRITE_BUILTIN
  76   #endif
  77 #endif // USE_XLC_BUILTINS
  78 
  79 // NULL vs NULL_WORD:
  80 // On Linux NULL is defined as a special type '__null'. Assigning __null to
  81 // integer variable will cause gcc warning. Use NULL_WORD in places where a
  82 // pointer is stored as integer value.  On some platforms, sizeof(intptr_t) >
  83 // sizeof(void*), so here we want something which is integer type, but has the
  84 // same size as a pointer.
  85 #ifdef __GNUC__
  86   #error XLC and __GNUC__?
  87 #else
  88   #define NULL_WORD  NULL
  89 #endif
  90 
  91 // AIX also needs a 64 bit NULL to work as a null address pointer.
  92 // Most system includes on AIX would define it as an int 0 if not already defined with one
  93 // exception: /usr/include/dirent.h will unconditionally redefine NULL to int 0 again.
  94 // In this case you need to copy the following defines to a position after #include <dirent.h>
  95 // (see jmv_aix.h).
  96 #ifdef AIX
  97   #ifdef _LP64
  98     #undef NULL
  99     #define NULL 0L
 100   #else
 101     #ifndef NULL
 102       #define NULL 0
 103     #endif
 104   #endif
 105 #endif // AIX
 106 
 107 // Compiler-specific primitive types
 108 // All defs of int (uint16_6 etc) are defined in AIX' /usr/include/stdint.h
 109 
 110 // Additional Java basic types
 111 
 112 typedef uint8_t  jubyte;
 113 typedef uint16_t jushort;
 114 typedef uint32_t juint;
 115 typedef uint64_t julong;
 116 
 117 
 118 //----------------------------------------------------------------------------------------------------
 119 // Constant for jlong (specifying an long long canstant is C++ compiler specific)
 120 
 121 // Build a 64bit integer constant
 122 #define CONST64(x)  (x ## LL)
 123 #define UCONST64(x) (x ## ULL)
 124 
 125 const jlong min_jlong = CONST64(0x8000000000000000);
 126 const jlong max_jlong = CONST64(0x7fffffffffffffff);
 127 
 128 //----------------------------------------------------------------------------------------------------
 129 // Debugging
 130 
 131 #define DEBUG_EXCEPTION ::abort();
 132 
 133 extern "C" void breakpoint();
 134 #define BREAKPOINT ::breakpoint()
 135 
 136 // checking for nanness
 137 #ifdef AIX
 138 inline int g_isnan(float  f) { return isnan(f); }
 139 inline int g_isnan(double f) { return isnan(f); }
 140 #else
 141 #error "missing platform-specific definition here"
 142 #endif
 143 
 144 // Checking for finiteness
 145 
 146 inline int g_isfinite(jfloat  f)                 { return finite(f); }
 147 inline int g_isfinite(jdouble f)                 { return finite(f); }
 148 
 149 
 150 // Wide characters
 151 
 152 inline int wcslen(const jchar* x) { return wcslen((const wchar_t*)x); }
 153 
 154 
 155 // Portability macros
 156 #define PRAGMA_INTERFACE             #pragma interface
 157 #define PRAGMA_IMPLEMENTATION        #pragma implementation
 158 #define VALUE_OBJ_CLASS_SPEC
 159 
 160 // Formatting.
 161 #ifdef _LP64
 162 #define FORMAT64_MODIFIER "l"
 163 #else // !_LP64
 164 #define FORMAT64_MODIFIER "ll"
 165 #endif // _LP64
 166 
 167 // Cannot use xlc's offsetof as implementation of hotspot's
 168 // offset_of(), because xlc warns about applying offsetof() to non-POD
 169 // object and xlc cannot compile the expression offsetof(DataLayout,
 170 // _cells[index]) in DataLayout::cell_offset() .  Therefore we define
 171 // offset_of as it is defined for gcc.
 172 #define offset_of(klass,field) (size_t)((intx)&(((klass*)16)->field) - 16)
 173 
 174 // Some constant sizes used throughout the AIX port
 175 #define SIZE_1K   ((uint64_t) UCONST64(        0x400))
 176 #define SIZE_4K   ((uint64_t) UCONST64(       0x1000))
 177 #define SIZE_64K  ((uint64_t) UCONST64(      0x10000))
 178 #define SIZE_1M   ((uint64_t) UCONST64(     0x100000))
 179 #define SIZE_4M   ((uint64_t) UCONST64(     0x400000))
 180 #define SIZE_8M   ((uint64_t) UCONST64(     0x800000))
 181 #define SIZE_16M  ((uint64_t) UCONST64(    0x1000000))
 182 #define SIZE_256M ((uint64_t) UCONST64(   0x10000000))
 183 #define SIZE_1G   ((uint64_t) UCONST64(   0x40000000))
 184 #define SIZE_2G   ((uint64_t) UCONST64(   0x80000000))
 185 #define SIZE_4G   ((uint64_t) UCONST64(  0x100000000))
 186 #define SIZE_16G  ((uint64_t) UCONST64(  0x400000000))
 187 #define SIZE_32G  ((uint64_t) UCONST64(  0x800000000))
 188 #define SIZE_64G  ((uint64_t) UCONST64( 0x1000000000))
 189 #define SIZE_1T   ((uint64_t) UCONST64(0x10000000000))
 190 
 191 
 192 #endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_XLC_HPP