jniTypes_sparc.hpp revision 1472:c18cbe5936b8 
1/*
2 * Copyright (c) 1998, 2002, 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.
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23 */
24
25// This file holds platform-dependent routines used to write primitive jni
26// types to the array of arguments passed into JavaCalls::call
27
28class JNITypes : AllStatic {
29  // These functions write a java primitive type (in native format)
30  // to a java stack slot array to be passed as an argument to JavaCalls:calls.
31  // I.e., they are functionally 'push' operations if they have a 'pos'
32  // formal parameter.  Note that jlong's and jdouble's are written
33  // _in reverse_ of the order in which they appear in the interpreter
34  // stack.  This is because call stubs (see stubGenerator_sparc.cpp)
35  // reverse the argument list constructed by JavaCallArguments (see
36  // javaCalls.hpp).
37
38private:
39  // Helper routines.
40  static inline void    put_int2 (jint *from, jint *to)           { to[0] = from[0]; to[1] = from[1]; }
41  static inline void    put_int2 (jint *from, jint *to, int& pos) { put_int2 (from, (jint *)((intptr_t *)to + pos)); pos += 2; }
42  static inline void    put_int2r(jint *from, jint *to)           { to[0] = from[1]; to[1] = from[0]; }
43  static inline void    put_int2r(jint *from, jint *to, int& pos) { put_int2r(from, (jint *)((intptr_t *)to + pos)); pos += 2; }
44
45public:
46  // Ints are stored in native format in one JavaCallArgument slot at *to.
47  static inline void    put_int(jint  from, intptr_t *to)               { *(jint *)(to +   0  ) =  from; }
48  static inline void    put_int(jint  from, intptr_t *to, int& pos)     { *(jint *)(to + pos++) =  from; }
49  static inline void    put_int(jint *from, intptr_t *to, int& pos)     { *(jint *)(to + pos++) = *from; }
50
51#ifdef _LP64
52  // Longs are stored in native format in one JavaCallArgument slot at *(to+1).
53  static inline void    put_long(jlong  from, intptr_t *to)             { *(jlong *)(to + 1 +   0) =  from; }
54  static inline void    put_long(jlong  from, intptr_t *to, int& pos)   { *(jlong *)(to + 1 + pos) =  from; pos += 2; }
55  static inline void    put_long(jlong *from, intptr_t *to, int& pos)   { *(jlong *)(to + 1 + pos) = *from; pos += 2; }
56#else
57  // Longs are stored in reversed native word format in two JavaCallArgument slots at *to.
58  // The high half is in *(to+1) and the low half in *to.
59  static inline void    put_long(jlong  from, intptr_t *to)            { put_int2r((jint *)&from, (jint *)to); }
60  static inline void    put_long(jlong  from, intptr_t *to, int& pos)  { put_int2r((jint *)&from, (jint *)to, pos); }
61  static inline void    put_long(jlong *from, intptr_t *to, int& pos)  { put_int2r((jint *) from, (jint *)to, pos); }
62#endif
63
64  // Oops are stored in native format in one JavaCallArgument slot at *to.
65  static inline void    put_obj(oop  from, intptr_t *to)                { *(oop *)(to +   0  ) =  from; }
66  static inline void    put_obj(oop  from, intptr_t *to, int& pos)      { *(oop *)(to + pos++) =  from; }
67  static inline void    put_obj(oop *from, intptr_t *to, int& pos)      { *(oop *)(to + pos++) = *from; }
68
69  // Floats are stored in native format in one JavaCallArgument slot at *to.
70  static inline void    put_float(jfloat  from, intptr_t *to)           { *(jfloat *)(to +   0  ) =  from; }
71  static inline void    put_float(jfloat  from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) =  from; }
72  static inline void    put_float(jfloat *from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) = *from; }
73
74#ifdef _LP64
75  // Doubles are stored in native word format in one JavaCallArgument slot at *(to+1).
76  static inline void    put_double(jdouble  from, intptr_t *to)           { *(jdouble *)(to + 1 +   0) =  from; }
77  static inline void    put_double(jdouble  from, intptr_t *to, int& pos) { *(jdouble *)(to + 1 + pos) =  from; pos += 2; }
78  static inline void    put_double(jdouble *from, intptr_t *to, int& pos) { *(jdouble *)(to + 1 + pos) = *from; pos += 2; }
79#else
80  // Doubles are stored in reversed native word format in two JavaCallArgument slots at *to.
81  static inline void    put_double(jdouble  from, intptr_t *to)           { put_int2r((jint *)&from, (jint *)to); }
82  static inline void    put_double(jdouble  from, intptr_t *to, int& pos) { put_int2r((jint *)&from, (jint *)to, pos); }
83  static inline void    put_double(jdouble *from, intptr_t *to, int& pos) { put_int2r((jint *) from, (jint *)to, pos); }
84#endif
85
86  // The get_xxx routines, on the other hand, actually _do_ fetch
87  // java primitive types from the interpreter stack.
88  static inline jint    get_int(intptr_t *from)         { return *(jint *)from; }
89
90#ifdef _LP64
91  static inline jlong   get_long(intptr_t *from)        { return *(jlong *)from; }
92#else
93  static inline jlong   get_long(intptr_t *from)        { return ((jlong)(*(  signed int *)((jint *)from    )) << 32) |
94                                                                 ((jlong)(*(unsigned int *)((jint *)from + 1)) <<  0); }
95#endif
96
97  static inline oop     get_obj(intptr_t *from)         { return *(oop *)from; }
98  static inline jfloat  get_float(intptr_t *from)       { return *(jfloat *)from; }
99
100#ifdef _LP64
101  static inline jdouble get_double(intptr_t *from)      { return *(jdouble *)from; }
102#else
103  static inline jdouble get_double(intptr_t *from)      { jlong jl = ((jlong)(*(  signed int *)((jint *)from    )) << 32) |
104                                                                     ((jlong)(*(unsigned int *)((jint *)from + 1)) <<  0);
105                                                          return *(jdouble *)&jl; }
106#endif
107
108};
109