jdk8-mips64-public/hotspot: src/share/vm/utilities/globalDefinitions

src/share/vm/utilities/globalDefinitions_sparcWorks.hpp@aefa2e84b424 (annotated)

src/share/vm/utilities/globalDefinitions_sparcWorks.hpp

Thu, 19 Mar 2015 19:53:34 +0100

author: zmajo
date: Thu, 19 Mar 2015 19:53:34 +0100
changeset 7638: aefa2e84b424
parent 7624: 6a4b9e574124
child 7994: 04ff2f6cd0eb
child 9858: b985cbb00e68
permissions: -rw-r--r--

8074869: C2 code generator can replace -0.0f with +0.0f on Linux
Summary: Instead of 'fpclass', use cast float->int and double->long to check if value is +0.0f and +0.0d, respectively.
Reviewed-by: kvn, simonis, dlong

 /*
  * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * 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.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef SHARE_VM_UTILITIES_GLOBALDEFINITIONS_SPARCWORKS_HPP
 #define SHARE_VM_UTILITIES_GLOBALDEFINITIONS_SPARCWORKS_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>
 #define __USE_LEGACY_PROTOTYPES__
 # include <dirent.h>
 #undef __USE_LEGACY_PROTOTYPES__
 # include <string.h>
 # include <strings.h>     // for bsd'isms
 # include <stdarg.h>
 # include <stddef.h>      // for offsetof
 # include <stdio.h>
 # include <stdlib.h>
 # include <wchar.h>
 # include <stdarg.h>
 #ifdef SOLARIS
 # include <ieeefp.h>
 #endif
 # include <math.h>
 # include <time.h>
 # include <fcntl.h>
 # include <dlfcn.h>
 # include <pthread.h>
 #ifdef SOLARIS
 # include <thread.h>
 #endif
 # include <limits.h>
 # include <errno.h>
 #ifdef SOLARIS
 # include <sys/trap.h>
 # include <sys/regset.h>
 # include <sys/procset.h>
 # include <ucontext.h>
 # include <setjmp.h>
 #endif
 # ifdef SOLARIS_MUTATOR_LIBTHREAD
 # include <sys/procfs.h>
 # endif
 #include <inttypes.h>
 // Solaris 8 doesn't provide definitions of these
 #ifdef SOLARIS
 #ifndef PRIdPTR
 #if defined(_LP64)
 #define PRIdPTR                 "ld"
 #define PRIuPTR                 "lu"
 #define PRIxPTR                 "lx"
 #else
 #define PRIdPTR                 "d"
 #define PRIuPTR                 "u"
 #define PRIxPTR                 "x"
 #endif
 #endif
 #endif
 #ifdef LINUX
 # include <signal.h>
 # include <ucontext.h>
 # include <sys/time.h>
 #endif
 // 4810578: varargs unsafe on 32-bit integer/64-bit pointer architectures
 // When __cplusplus is defined, NULL is defined as 0 (32-bit constant) in
 // system header files.  On 32-bit architectures, there is no problem.
 // On 64-bit architectures, defining NULL as a 32-bit constant can cause
 // problems with varargs functions: C++ integral promotion rules say for
 // varargs, we pass the argument 0 as an int.  So, if NULL was passed to a
 // varargs function it will remain 32-bits.  Depending on the calling
 // convention of the machine, if the argument is passed on the stack then
 // only 32-bits of the "NULL" pointer may be initialized to zero.  The
 // other 32-bits will be garbage.  If the varargs function is expecting a
 // pointer when it extracts the argument, then we have a problem.
 //
 // Solution: For 64-bit architectures, redefine NULL as 64-bit constant 0.
 //
 // Note: this fix doesn't work well on Linux because NULL will be overwritten
 // whenever a system header file is included. Linux handles NULL correctly
 // through a special type '__null'.
 #ifdef SOLARIS
 #ifdef _LP64
 #undef NULL
 #define NULL 0L
 #else
 #ifndef NULL
 #define NULL 0
 #endif
 #endif
 #endif
 // 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 LINUX
   #ifdef _LP64
     #define NULL_WORD  0L
   #else
     // Cast 0 to intptr_t rather than int32_t since they are not the same type
     // on some platforms.
     #define NULL_WORD  ((intptr_t)0)
   #endif
 #else
   #define NULL_WORD  NULL
 #endif
 #ifndef LINUX
 // Compiler-specific primitive types
 typedef unsigned short     uint16_t;
 #ifndef _UINT32_T
 #define _UINT32_T
 typedef unsigned int       uint32_t;
 #endif
 #if !defined(_SYS_INT_TYPES_H)
 #ifndef _UINT64_T
 #define _UINT64_T
 typedef unsigned long long uint64_t;
 #endif
 // %%%% how to access definition of intptr_t portably in 5.5 onward?
 typedef int                     intptr_t;
 typedef unsigned int            uintptr_t;
 // If this gets an error, figure out a symbol XXX that implies the
 // prior definition of intptr_t, and add "&& !defined(XXX)" above.
 #endif
 #endif
 // On solaris 8, UINTPTR_MAX is defined as empty.
 // Everywhere else it's an actual value.
 #if UINTPTR_MAX - 1 == -1
 #undef UINTPTR_MAX
 #ifdef _LP64
 #define UINTPTR_MAX UINT64_MAX
 #else
 #define UINTPTR_MAX UINT32_MAX
 #endif /* ifdef _LP64 */
 #endif
 // Additional Java basic types
 typedef unsigned char      jubyte;
 typedef unsigned short     jushort;
 typedef unsigned int       juint;
 typedef unsigned long long julong;
 //----------------------------------------------------------------------------------------------------
 // Constant for jlong (specifying an long long constant 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);
 #ifdef SOLARIS
 //----------------------------------------------------------------------------------------------------
 // ANSI C++ fixes
 // NOTE:In the ANSI committee's continuing attempt to make each version
 // of C++ incompatible with the previous version, you can no longer cast
 // pointers to functions without specifying linkage unless you want to get
 // warnings.
 //
 // This also means that pointers to functions can no longer be "hidden"
 // in opaque types like void * because at the invokation point warnings
 // will be generated. While this makes perfect sense from a type safety
 // point of view it causes a lot of warnings on old code using C header
 // files. Here are some typedefs to make the job of silencing warnings
 // a bit easier.
 //
 // The final kick in the teeth is that you can only have extern "C" linkage
 // specified at file scope. So these typedefs are here rather than in the
 // .hpp for the class (os:Solaris usually) that needs them.
 extern "C" {
    typedef int (*int_fnP_thread_t_iP_uP_stack_tP_gregset_t)(thread_t, int*, unsigned *, stack_t*, gregset_t);
    typedef int (*int_fnP_thread_t_i_gregset_t)(thread_t, int, gregset_t);
    typedef int (*int_fnP_thread_t_i)(thread_t, int);
    typedef int (*int_fnP_thread_t)(thread_t);
    typedef int (*int_fnP_cond_tP_mutex_tP_timestruc_tP)(cond_t *cv, mutex_t *mx, timestruc_t *abst);
    typedef int (*int_fnP_cond_tP_mutex_tP)(cond_t *cv, mutex_t *mx);
    // typedef for missing API in libc
    typedef int (*int_fnP_mutex_tP_i_vP)(mutex_t *, int, void *);
    typedef int (*int_fnP_mutex_tP)(mutex_t *);
    typedef int (*int_fnP_cond_tP_i_vP)(cond_t *cv, int scope, void *arg);
    typedef int (*int_fnP_cond_tP)(cond_t *cv);
 };
 #endif
 //----------------------------------------------------------------------------------------------------
 // Debugging
 #define DEBUG_EXCEPTION ::abort();
 extern "C" void breakpoint();
 #define BREAKPOINT ::breakpoint()
 // checking for nanness
 #ifdef SOLARIS
 #ifdef SPARC
 inline int g_isnan(float  f) { return isnanf(f); }
 #else
 // isnanf() broken on Intel Solaris use isnand()
 inline int g_isnan(float  f) { return isnand(f); }
 #endif
 inline int g_isnan(double f) { return isnand(f); }
 #elif LINUX
 inline int g_isnan(float  f) { return isnanf(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); }
 // Misc
 // NOTE: This one leads to an infinite recursion on Linux
 #ifndef LINUX
 int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr);
 #define vsnprintf local_vsnprintf
 #endif
 // Portability macros
 #define PRAGMA_INTERFACE
 #define PRAGMA_IMPLEMENTATION
 #define PRAGMA_IMPLEMENTATION_(arg)
 #define VALUE_OBJ_CLASS_SPEC    : public _ValueObj
 // Formatting.
 #ifdef _LP64
 #define FORMAT64_MODIFIER "l"
 #else // !_LP64
 #define FORMAT64_MODIFIER "ll"
 #endif // _LP64
 #define offset_of(klass,field) offsetof(klass,field)
 #endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_SPARCWORKS_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/utilities/globalDefinitions_sparcWorks.hpp@aefa2e84b424 (annotated)

src/share/vm/utilities/globalDefinitions_sparcWorks.hpp