jniTypes_arm.hpp revision 12422:98fe046473c9 
1/*
2 * Copyright (c) 2008, 2013, 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
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7 * published by the Free Software Foundation.
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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.
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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23 */
24
25#ifndef CPU_ARM_VM_JNITYPES_ARM_HPP
26#define CPU_ARM_VM_JNITYPES_ARM_HPP
27
28#include "memory/allocation.hpp"
29#include "oops/oop.hpp"
30#include "prims/jni.h"
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
35class 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_arm.cpp)
42  // reverse the argument list constructed by JavaCallArguments (see
43  // javaCalls.hpp).
44
45private:
46
47#ifndef AARCH64
48  // 32bit Helper routines.
49  static inline void put_int2r(jint *from, intptr_t *to)           { *(jint *)(to++) = from[1];
50                                                                        *(jint *)(to  ) = from[0]; }
51  static inline void put_int2r(jint *from, intptr_t *to, int& pos) { put_int2r(from, to + pos); pos += 2; }
52#endif
53
54public:
55  // Ints are stored in native format in one JavaCallArgument slot at *to.
56  static inline void put_int(jint  from, intptr_t *to)           { *(jint *)(to +   0  ) =  from; }
57  static inline void put_int(jint  from, intptr_t *to, int& pos) { *(jint *)(to + pos++) =  from; }
58  static inline void put_int(jint *from, intptr_t *to, int& pos) { *(jint *)(to + pos++) = *from; }
59
60#ifdef AARCH64
61  // Longs are stored in native format in one JavaCallArgument slot at *(to+1).
62  static inline void put_long(jlong  from, intptr_t *to)           { *(jlong *)(to + 1 +   0) =  from; }
63  static inline void put_long(jlong  from, intptr_t *to, int& pos) { *(jlong *)(to + 1 + pos) =  from; pos += 2; }
64  static inline void put_long(jlong *from, intptr_t *to, int& pos) { *(jlong *)(to + 1 + pos) = *from; pos += 2; }
65#else
66  // Longs are stored in big-endian word format in two JavaCallArgument slots at *to.
67  // The high half is in *to and the low half in *(to+1).
68  static inline void put_long(jlong  from, intptr_t *to)           { put_int2r((jint *)&from, to); }
69  static inline void put_long(jlong  from, intptr_t *to, int& pos) { put_int2r((jint *)&from, to, pos); }
70  static inline void put_long(jlong *from, intptr_t *to, int& pos) { put_int2r((jint *) from, to, pos); }
71#endif
72
73  // Oops are stored in native format in one JavaCallArgument slot at *to.
74  static inline void put_obj(oop  from, intptr_t *to)           { *(oop *)(to +   0  ) =  from; }
75  static inline void put_obj(oop  from, intptr_t *to, int& pos) { *(oop *)(to + pos++) =  from; }
76  static inline void put_obj(oop *from, intptr_t *to, int& pos) { *(oop *)(to + pos++) = *from; }
77
78  // Floats are stored in native format in one JavaCallArgument slot at *to.
79  static inline void put_float(jfloat  from, intptr_t *to)           { *(jfloat *)(to +   0  ) =  from;  }
80  static inline void put_float(jfloat  from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) =  from; }
81  static inline void put_float(jfloat *from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) = *from; }
82
83#ifdef AARCH64
84  // Doubles are stored in native word format in one JavaCallArgument slot at *(to+1).
85  static inline void put_double(jdouble  from, intptr_t *to)           { *(jdouble *)(to + 1 +   0) =  from; }
86  static inline void put_double(jdouble  from, intptr_t *to, int& pos) { *(jdouble *)(to + 1 + pos) =  from; pos += 2; }
87  static inline void put_double(jdouble *from, intptr_t *to, int& pos) { *(jdouble *)(to + 1 + pos) = *from; pos += 2; }
88#else
89  // Doubles are stored in big-endian word format in two JavaCallArgument slots at *to.
90  // The high half is in *to and the low half in *(to+1).
91  static inline void put_double(jdouble  from, intptr_t *to)           { put_int2r((jint *)&from, to); }
92  static inline void put_double(jdouble  from, intptr_t *to, int& pos) { put_int2r((jint *)&from, to, pos); }
93  static inline void put_double(jdouble *from, intptr_t *to, int& pos) { put_int2r((jint *) from, to, pos); }
94#endif
95
96};
97
98#endif // CPU_ARM_VM_JNITYPES_ARM_HPP
99