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  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

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 #ifndef SHARE_VM_UTILITIES_GLOBALDEFINITIONS_XLC_HPP

 #define SHARE_VM_UTILITIES_GLOBALDEFINITIONS_XLC_HPP

 #include "prims/jni.h"

 // This file holds compiler-dependent includes,

 // globally used constants & types, class (forward)

 // declarations and a few frequently used utility functions.

 #include <ctype.h>

 #include <string.h>

 #include <stdarg.h>

 #include <stddef.h>

 #include <stdio.h>

 #include <stdlib.h>

 #include <wchar.h>

 #include <math.h>

 #ifndef FP_PZERO

 // Linux doesn't have positive/negative zero

 #define FP_PZERO FP_ZERO

 #endif

 #if (!defined fpclass)

 #define fpclass fpclassify

 #endif

 #include <time.h>

 #include <fcntl.h>

 #include <dlfcn.h>

 #include <pthread.h>

 #include <limits.h>

 #include <errno.h>

 #include <stdint.h>

 // Use XLC compiler builtins instead of inline assembler

 #define USE_XLC_BUILTINS

 #ifdef USE_XLC_BUILTINS

 #include <builtins.h>

   #if __IBMCPP__ < 1000

   // the funtion prototype for __dcbtst(void *) is missing in XLC V8.0

   // I could compile a little test, where I provided the prototype.

   // The generated code was correct there. This is the prototype:

   // extern "builtin" void __dcbtst (void *);

   // For now we don't make use of it when compiling with XLC V8.0

   #else

   // __IBMCPP__ >= 1000

   // XLC V10 provides the prototype for __dcbtst (void *);

   #define USE_XLC_PREFETCH_WRITE_BUILTIN

   #endif

 #endif // USE_XLC_BUILTINS

 // NULL vs NULL_WORD:

 // On Linux NULL is defined as a special type '__null'. Assigning __null to

 // integer variable will cause gcc warning. Use NULL_WORD in places where a

 // pointer is stored as integer value.  On some platforms, sizeof(intptr_t) >

 // sizeof(void*), so here we want something which is integer type, but has the

 // same size as a pointer.

 #ifdef __GNUC__

   #error XLC and __GNUC__?

 #else

   #define NULL_WORD  NULL

 #endif

 // AIX also needs a 64 bit NULL to work as a null address pointer.

 // Most system includes on AIX would define it as an int 0 if not already defined with one

 // exception: /usr/include/dirent.h will unconditionally redefine NULL to int 0 again.

 // In this case you need to copy the following defines to a position after #include <dirent.h>

 // (see jmv_aix.h).

 #ifdef AIX

   #ifdef _LP64

     #undef NULL

     #define NULL 0L

   #else

     #ifndef NULL

       #define NULL 0

     #endif

   #endif

 #endif // AIX

 // Compiler-specific primitive types

 // All defs of int (uint16_6 etc) are defined in AIX' /usr/include/stdint.h

 // Additional Java basic types

 typedef uint8_t  jubyte;

 typedef uint16_t jushort;

 typedef uint32_t juint;

 typedef uint64_t julong;

 //----------------------------------------------------------------------------------------------------

 // Special (possibly not-portable) casts

 // Cast floats into same-size integers and vice-versa w/o changing bit-pattern

 // %%%%%% These seem like standard C++ to me--how about factoring them out? - Ungar

 inline jint    jint_cast   (jfloat  x)           { return *(jint*   )&x; }

 inline jlong   jlong_cast  (jdouble x)           { return *(jlong*  )&x; }

 inline jfloat  jfloat_cast (jint    x)           { return *(jfloat* )&x; }

 inline jdouble jdouble_cast(jlong   x)           { return *(jdouble*)&x; }

 //----------------------------------------------------------------------------------------------------

 // Constant for jlong (specifying an long long canstant is C++ compiler specific)

 // Build a 64bit integer constant

 #define CONST64(x)  (x ## LL)

 #define UCONST64(x) (x ## ULL)

 const jlong min_jlong = CONST64(0x8000000000000000);

 const jlong max_jlong = CONST64(0x7fffffffffffffff);

 //----------------------------------------------------------------------------------------------------

 // Debugging

 #define DEBUG_EXCEPTION ::abort();

 extern "C" void breakpoint();

 #define BREAKPOINT ::breakpoint()

 // checking for nanness

 #ifdef AIX

 inline int g_isnan(float  f) { return isnan(f); }

 inline int g_isnan(double f) { return isnan(f); }

 #else

 #error "missing platform-specific definition here"

 #endif

 // Checking for finiteness

 inline int g_isfinite(jfloat  f)                 { return finite(f); }

 inline int g_isfinite(jdouble f)                 { return finite(f); }

 // Wide characters

 inline int wcslen(const jchar* x) { return wcslen((const wchar_t*)x); }

 // Portability macros

 #define PRAGMA_INTERFACE             #pragma interface

 #define PRAGMA_IMPLEMENTATION        #pragma implementation

 #define VALUE_OBJ_CLASS_SPEC

 // Formatting.

 #ifdef _LP64

 #define FORMAT64_MODIFIER "l"

 #else // !_LP64

 #define FORMAT64_MODIFIER "ll"

 #endif // _LP64

 // Cannot use xlc's offsetof as implementation of hotspot's

 // offset_of(), because xlc warns about applying offsetof() to non-POD

 // object and xlc cannot compile the expression offsetof(DataLayout,

 // _cells[index]) in DataLayout::cell_offset() .  Therefore we define

 // offset_of as it is defined for gcc.

 #define offset_of(klass,field) (size_t)((intx)&(((klass*)16)->field) - 16)

 // Some constant sizes used throughout the AIX port

 #define SIZE_1K   ((uint64_t)         0x400ULL)

 #define SIZE_4K   ((uint64_t)        0x1000ULL)

 #define SIZE_64K  ((uint64_t)       0x10000ULL)

 #define SIZE_1M   ((uint64_t)      0x100000ULL)

 #define SIZE_4M   ((uint64_t)      0x400000ULL)

 #define SIZE_8M   ((uint64_t)      0x800000ULL)

 #define SIZE_16M  ((uint64_t)     0x1000000ULL)

 #define SIZE_256M ((uint64_t)    0x10000000ULL)

 #define SIZE_1G   ((uint64_t)    0x40000000ULL)

 #define SIZE_2G   ((uint64_t)    0x80000000ULL)

 #define SIZE_4G   ((uint64_t)   0x100000000ULL)

 #define SIZE_16G  ((uint64_t)   0x400000000ULL)

 #define SIZE_32G  ((uint64_t)   0x800000000ULL)

 #define SIZE_64G  ((uint64_t)  0x1000000000ULL)

 #define SIZE_1T   ((uint64_t) 0x10000000000ULL)

 #endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_XLC_HPP