1 /*
2 * Copyright (c) 2013, Red Hat Inc.
3 * Copyright (c) 1998, 2010, Oracle and/or its affiliates.
4 * All rights reserved.
5 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 *
7 * This code is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 only, as
9 * published by the Free Software Foundation.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 *
25 */
26
27 #ifndef CPU_AARCH64_VM_JNITYPES_AARCH64_HPP
28 #define CPU_AARCH64_VM_JNITYPES_AARCH64_HPP
29
30 #include "memory/allocation.hpp"
31 #include "oops/oop.hpp"
32 #include "prims/jni.h"
33
34 // This file holds platform-dependent routines used to write primitive jni
35 // types to the array of arguments passed into JavaCalls::call
36
37 class JNITypes : AllStatic {
38 // These functions write a java primitive type (in native format)
39 // to a java stack slot array to be passed as an argument to JavaCalls:calls.
40 // I.e., they are functionally 'push' operations if they have a 'pos'
41 // formal parameter. Note that jlong's and jdouble's are written
42 // _in reverse_ of the order in which they appear in the interpreter
43 // stack. This is because call stubs (see stubGenerator_sparc.cpp)
44 // reverse the argument list constructed by JavaCallArguments (see
45 // javaCalls.hpp).
46
47 public:
48 // Ints are stored in native format in one JavaCallArgument slot at *to.
49 static inline void put_int(jint from, intptr_t *to) { *(jint *)(to + 0 ) = from; }
50 static inline void put_int(jint from, intptr_t *to, int& pos) { *(jint *)(to + pos++) = from; }
51 static inline void put_int(jint *from, intptr_t *to, int& pos) { *(jint *)(to + pos++) = *from; }
52
53 // Longs are stored in native format in one JavaCallArgument slot at
54 // *(to+1).
55 static inline void put_long(jlong from, intptr_t *to) {
56 *(jlong*) (to + 1) = from;
57 }
58
59 static inline void put_long(jlong from, intptr_t *to, int& pos) {
60 *(jlong*) (to + 1 + pos) = from;
61 pos += 2;
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 // Oops are stored in native format in one JavaCallArgument slot at *to.
70 static inline void put_obj(oop from, intptr_t *to) { *(oop *)(to + 0 ) = from; }
71 static inline void put_obj(oop from, intptr_t *to, int& pos) { *(oop *)(to + pos++) = from; }
72 static inline void put_obj(oop *from, intptr_t *to, int& pos) { *(oop *)(to + pos++) = *from; }
73
74 // Floats are stored in native format in one JavaCallArgument slot at *to.
75 static inline void put_float(jfloat from, intptr_t *to) { *(jfloat *)(to + 0 ) = from; }
76 static inline void put_float(jfloat from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) = from; }
77 static inline void put_float(jfloat *from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) = *from; }
78
79 #undef _JNI_SLOT_OFFSET
80 #define _JNI_SLOT_OFFSET 1
81 // Doubles are stored in native word format in one JavaCallArgument
82 // slot at *(to+1).
83 static inline void put_double(jdouble from, intptr_t *to) {
84 *(jdouble*) (to + 1) = from;
85 }
86
87 static inline void put_double(jdouble from, intptr_t *to, int& pos) {
88 *(jdouble*) (to + 1 + pos) = from;
89 pos += 2;
90 }
91
92 static inline void put_double(jdouble *from, intptr_t *to, int& pos) {
93 *(jdouble*) (to + 1 + pos) = *from;
94 pos += 2;
95 }
96
97 // The get_xxx routines, on the other hand, actually _do_ fetch
98 // java primitive types from the interpreter stack.
99 // No need to worry about alignment on Intel.
100 static inline jint get_int (intptr_t *from) { return *(jint *) from; }
101 static inline jlong get_long (intptr_t *from) { return *(jlong *) (from + _JNI_SLOT_OFFSET); }
102 static inline oop get_obj (intptr_t *from) { return *(oop *) from; }
103 static inline jfloat get_float (intptr_t *from) { return *(jfloat *) from; }
104 static inline jdouble get_double(intptr_t *from) { return *(jdouble *)(from + _JNI_SLOT_OFFSET); }
105 #undef _JNI_SLOT_OFFSET
106 };
107
108 #endif // CPU_AARCH64_VM_JNITYPES_AARCH64_HPP