1/*
2 * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2012, 2013 SAP SE. All rights reserved.
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This code is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 only, as
8 * published by the Free Software Foundation.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
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24 */
25
26#ifndef CPU_PPC_VM_JNITYPES_PPC_HPP
27#define CPU_PPC_VM_JNITYPES_PPC_HPP
28
29#include "memory/allocation.hpp"
30#include "oops/oop.hpp"
31#include "prims/jni.h"
32
33// This file holds platform-dependent routines used to write primitive
34// jni types to the array of arguments passed into JavaCalls::call.
35
36class JNITypes : AllStatic {
37  // These functions write a java primitive type (in native format) to
38  // a java stack slot array to be passed as an argument to
39  // JavaCalls:calls.  I.e., they are functionally 'push' operations
40  // if they have a 'pos' formal parameter.  Note that jlong's and
41  // jdouble's are written _in reverse_ of the order in which they
42  // appear in the interpreter stack.  This is because call stubs (see
43  // stubGenerator_sparc.cpp) reverse the argument list constructed by
44  // JavaCallArguments (see javaCalls.hpp).
45
46 private:
47
48#ifndef PPC64
49#error "ppc32 support currently not implemented!!!"
50#endif // PPC64
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
59  // *(to+1).
60  static inline void put_long(jlong  from, intptr_t *to) {
61    *(jlong*) (to + 1) = from;
62  }
63
64  static inline void put_long(jlong  from, intptr_t *to, int& pos) {
65    *(jlong*) (to + 1 + pos) = from;
66    pos += 2;
67  }
68
69  static inline void put_long(jlong *from, intptr_t *to, int& pos) {
70    *(jlong*) (to + 1 + pos) = *from;
71    pos += 2;
72  }
73
74  // Oops are stored in native format in one JavaCallArgument slot at *to.
75  static inline void put_obj(oop  from, intptr_t *to)           { *(oop *)(to +   0  ) =  from; }
76  static inline void put_obj(oop  from, intptr_t *to, int& pos) { *(oop *)(to + pos++) =  from; }
77  static inline void put_obj(oop *from, intptr_t *to, int& pos) { *(oop *)(to + pos++) = *from; }
78
79  // Floats are stored in native format in one JavaCallArgument slot at *to.
80  static inline void put_float(jfloat  from, intptr_t *to)           { *(jfloat *)(to +   0  ) =  from;  }
81  static inline void put_float(jfloat  from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) =  from; }
82  static inline void put_float(jfloat *from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) = *from; }
83
84  // Doubles are stored in native word format in one JavaCallArgument
85  // slot at *(to+1).
86  static inline void put_double(jdouble  from, intptr_t *to) {
87    *(jdouble*) (to + 1) = from;
88  }
89
90  static inline void put_double(jdouble  from, intptr_t *to, int& pos) {
91    *(jdouble*) (to + 1 + pos) = from;
92    pos += 2;
93  }
94
95  static inline void put_double(jdouble *from, intptr_t *to, int& pos) {
96    *(jdouble*) (to + 1 + pos) = *from;
97    pos += 2;
98  }
99
100  // The get_xxx routines, on the other hand, actually _do_ fetch
101  // java primitive types from the interpreter stack.
102  // No need to worry about alignment on Intel.
103  static inline jint    get_int   (intptr_t *from) { return *(jint *)    from; }
104  static inline jlong   get_long  (intptr_t *from) { return *(jlong *)  (from + 1); }
105  static inline oop     get_obj   (intptr_t *from) { return *(oop *)     from; }
106  static inline jfloat  get_float (intptr_t *from) { return *(jfloat *)  from; }
107  static inline jdouble get_double(intptr_t *from) { return *(jdouble *)(from + 1); }
108};
109
110#endif // CPU_PPC_VM_JNITYPES_PPC_HPP
111