Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * Copyright (c) 1998, 2010, 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 CPU_X86_VM_JNITYPES_X86_HPP

 #define CPU_X86_VM_JNITYPES_X86_HPP

 #include "memory/allocation.hpp"

 #include "oops/oop.hpp"

 #include "prims/jni.h"

 // This file holds platform-dependent routines used to write primitive jni

 // types to the array of arguments passed into JavaCalls::call

 class JNITypes : AllStatic {

   // These functions write a java primitive type (in native format)

   // to a java stack slot array to be passed as an argument to JavaCalls:calls.

   // I.e., they are functionally 'push' operations if they have a 'pos'

   // formal parameter.  Note that jlong's and jdouble's are written

   // _in reverse_ of the order in which they appear in the interpreter

   // stack.  This is because call stubs (see stubGenerator_sparc.cpp)

   // reverse the argument list constructed by JavaCallArguments (see

   // javaCalls.hpp).

 private:

 #ifndef AMD64

   // 32bit Helper routines.

   static inline void    put_int2r(jint *from, intptr_t *to)           { *(jint *)(to++) = from[1];

                                                                         *(jint *)(to  ) = from[0]; }

   static inline void    put_int2r(jint *from, intptr_t *to, int& pos) { put_int2r(from, to + pos); pos += 2; }

 #endif // AMD64

 public:

   // Ints are stored in native format in one JavaCallArgument slot at *to.

   static inline void    put_int(jint  from, intptr_t *to)           { *(jint *)(to +   0  ) =  from; }

   static inline void    put_int(jint  from, intptr_t *to, int& pos) { *(jint *)(to + pos++) =  from; }

   static inline void    put_int(jint *from, intptr_t *to, int& pos) { *(jint *)(to + pos++) = *from; }

 #ifdef AMD64

   // Longs are stored in native format in one JavaCallArgument slot at

   // *(to+1).

   static inline void put_long(jlong  from, intptr_t *to) {

     *(jlong*) (to + 1) = from;

   }

   static inline void put_long(jlong  from, intptr_t *to, int& pos) {

     *(jlong*) (to + 1 + pos) = from;

     pos += 2;

   }

   static inline void put_long(jlong *from, intptr_t *to, int& pos) {

     *(jlong*) (to + 1 + pos) = *from;

     pos += 2;

   }

 #else

   // Longs are stored in big-endian word format in two JavaCallArgument slots at *to.

   // The high half is in *to and the low half in *(to+1).

   static inline void    put_long(jlong  from, intptr_t *to)           { put_int2r((jint *)&from, to); }

   static inline void    put_long(jlong  from, intptr_t *to, int& pos) { put_int2r((jint *)&from, to, pos); }

   static inline void    put_long(jlong *from, intptr_t *to, int& pos) { put_int2r((jint *) from, to, pos); }

 #endif // AMD64

   // Oops are stored in native format in one JavaCallArgument slot at *to.

   static inline void    put_obj(oop  from, intptr_t *to)           { *(oop *)(to +   0  ) =  from; }

   static inline void    put_obj(oop  from, intptr_t *to, int& pos) { *(oop *)(to + pos++) =  from; }

   static inline void    put_obj(oop *from, intptr_t *to, int& pos) { *(oop *)(to + pos++) = *from; }

   // Floats are stored in native format in one JavaCallArgument slot at *to.

   static inline void    put_float(jfloat  from, intptr_t *to)           { *(jfloat *)(to +   0  ) =  from;  }

   static inline void    put_float(jfloat  from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) =  from; }

   static inline void    put_float(jfloat *from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) = *from; }

 #undef _JNI_SLOT_OFFSET

 #ifdef AMD64

 #define _JNI_SLOT_OFFSET 1

   // Doubles are stored in native word format in one JavaCallArgument

   // slot at *(to+1).

   static inline void put_double(jdouble  from, intptr_t *to) {

     *(jdouble*) (to + 1) = from;

   }

   static inline void put_double(jdouble  from, intptr_t *to, int& pos) {

     *(jdouble*) (to + 1 + pos) = from;

     pos += 2;

   }

   static inline void put_double(jdouble *from, intptr_t *to, int& pos) {

     *(jdouble*) (to + 1 + pos) = *from;

     pos += 2;

   }

 #else

 #define _JNI_SLOT_OFFSET 0

   // Doubles are stored in big-endian word format in two JavaCallArgument slots at *to.

   // The high half is in *to and the low half in *(to+1).

   static inline void    put_double(jdouble  from, intptr_t *to)           { put_int2r((jint *)&from, to); }

   static inline void    put_double(jdouble  from, intptr_t *to, int& pos) { put_int2r((jint *)&from, to, pos); }

   static inline void    put_double(jdouble *from, intptr_t *to, int& pos) { put_int2r((jint *) from, to, pos); }

 #endif // AMD64

   // The get_xxx routines, on the other hand, actually _do_ fetch

   // java primitive types from the interpreter stack.

   // No need to worry about alignment on Intel.

   static inline jint    get_int   (intptr_t *from) { return *(jint *)   from; }

   static inline jlong   get_long  (intptr_t *from) { return *(jlong *)  (from + _JNI_SLOT_OFFSET); }

   static inline oop     get_obj   (intptr_t *from) { return *(oop *)    from; }

   static inline jfloat  get_float (intptr_t *from) { return *(jfloat *) from; }

   static inline jdouble get_double(intptr_t *from) { return *(jdouble *)(from + _JNI_SLOT_OFFSET); }

 #undef _JNI_SLOT_OFFSET

 };

 #endif // CPU_X86_VM_JNITYPES_X86_HPP