1 /*
   2  * Copyright (c) 1998, 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef CPU_SPARC_VM_JNITYPES_SPARC_HPP
  26 #define CPU_SPARC_VM_JNITYPES_SPARC_HPP
  27 
  28 #include "jni.h"
  29 #include "memory/allocation.hpp"
  30 #include "oops/oop.hpp"
  31 
  32 // This file holds platform-dependent routines used to write primitive jni
  33 // types to the array of arguments passed into JavaCalls::call
  34 
  35 class JNITypes : AllStatic {
  36   // These functions write a java primitive type (in native format)
  37   // to a java stack slot array to be passed as an argument to JavaCalls:calls.
  38   // I.e., they are functionally 'push' operations if they have a 'pos'
  39   // formal parameter.  Note that jlong's and jdouble's are written
  40   // _in reverse_ of the order in which they appear in the interpreter
  41   // stack.  This is because call stubs (see stubGenerator_sparc.cpp)
  42   // reverse the argument list constructed by JavaCallArguments (see
  43   // javaCalls.hpp).
  44 
  45 private:
  46   // Helper routines.
  47   static inline void    put_int2 (jint *from, jint *to)           { to[0] = from[0]; to[1] = from[1]; }
  48   static inline void    put_int2 (jint *from, jint *to, int& pos) { put_int2 (from, (jint *)((intptr_t *)to + pos)); pos += 2; }
  49   static inline void    put_int2r(jint *from, jint *to)           { to[0] = from[1]; to[1] = from[0]; }
  50   static inline void    put_int2r(jint *from, jint *to, int& pos) { put_int2r(from, (jint *)((intptr_t *)to + pos)); pos += 2; }
  51 
  52 public:
  53   // Ints are stored in native format in one JavaCallArgument slot at *to.
  54   static inline void    put_int(jint  from, intptr_t *to)               { *(jint *)(to +   0  ) =  from; }
  55   static inline void    put_int(jint  from, intptr_t *to, int& pos)     { *(jint *)(to + pos++) =  from; }
  56   static inline void    put_int(jint *from, intptr_t *to, int& pos)     { *(jint *)(to + pos++) = *from; }
  57 
  58   // Longs are stored in native format in one JavaCallArgument slot at *(to+1).
  59   static inline void    put_long(jlong  from, intptr_t *to)             { *(jlong *)(to + 1 +   0) =  from; }
  60   static inline void    put_long(jlong  from, intptr_t *to, int& pos)   { *(jlong *)(to + 1 + pos) =  from; pos += 2; }
  61   static inline void    put_long(jlong *from, intptr_t *to, int& pos)   { *(jlong *)(to + 1 + pos) = *from; pos += 2; }
  62 
  63   // Oops are stored in native format in one JavaCallArgument slot at *to.
  64   static inline void    put_obj(oop  from, intptr_t *to)                { *(oop *)(to +   0  ) =  from; }
  65   static inline void    put_obj(oop  from, intptr_t *to, int& pos)      { *(oop *)(to + pos++) =  from; }
  66   static inline void    put_obj(oop *from, intptr_t *to, int& pos)      { *(oop *)(to + pos++) = *from; }
  67 
  68   // Floats are stored in native format in one JavaCallArgument slot at *to.
  69   static inline void    put_float(jfloat  from, intptr_t *to)           { *(jfloat *)(to +   0  ) =  from; }
  70   static inline void    put_float(jfloat  from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) =  from; }
  71   static inline void    put_float(jfloat *from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) = *from; }
  72 
  73   // Doubles are stored in native word format in one JavaCallArgument slot at *(to+1).
  74   static inline void    put_double(jdouble  from, intptr_t *to)           { *(jdouble *)(to + 1 +   0) =  from; }
  75   static inline void    put_double(jdouble  from, intptr_t *to, int& pos) { *(jdouble *)(to + 1 + pos) =  from; pos += 2; }
  76   static inline void    put_double(jdouble *from, intptr_t *to, int& pos) { *(jdouble *)(to + 1 + pos) = *from; pos += 2; }
  77 
  78   // The get_xxx routines, on the other hand, actually _do_ fetch
  79   // java primitive types from the interpreter stack.
  80   static inline jint    get_int(intptr_t *from)         { return *(jint *)from; }
  81 
  82   static inline jlong   get_long(intptr_t *from)        { return *(jlong *)from; }
  83 
  84   static inline oop     get_obj(intptr_t *from)         { return *(oop *)from; }
  85   static inline jfloat  get_float(intptr_t *from)       { return *(jfloat *)from; }
  86 
  87   static inline jdouble get_double(intptr_t *from)      { return *(jdouble *)from; }
  88 
  89 };
  90 
  91 #endif // CPU_SPARC_VM_JNITYPES_SPARC_HPP