1 /*
2 * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.
3 * Copyright (c) 2014, Red Hat Inc. 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.
23 *
24 */
25
26 #ifndef CPU_AARCH64_VM_JNITYPES_AARCH64_HPP
27 #define CPU_AARCH64_VM_JNITYPES_AARCH64_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 jni
34 // types to the array of arguments passed into JavaCalls::call
35
36 class JNITypes : AllStatic {
37 // These functions write a java primitive type (in native format)
38 // to a java stack slot array to be passed as an argument to JavaCalls:calls.
39 // I.e., they are functionally 'push' operations if they have a 'pos'
40 // formal parameter. Note that jlong's and jdouble's are written
41 // _in reverse_ of the order in which they appear in the interpreter
42 // stack. This is because call stubs (see stubGenerator_sparc.cpp)
43 // reverse the argument list constructed by JavaCallArguments (see
44 // javaCalls.hpp).
45
46 public:
47 // Ints are stored in native format in one JavaCallArgument slot at *to.
48 static inline void put_int(jint from, intptr_t *to) { *(jint *)(to + 0 ) = from; }
49 static inline void put_int(jint from, intptr_t *to, int& pos) { *(jint *)(to + pos++) = from; }
50 static inline void put_int(jint *from, intptr_t *to, int& pos) { *(jint *)(to + pos++) = *from; }
51
52 // Longs are stored in native format in one JavaCallArgument slot at
53 // *(to+1).
54 static inline void put_long(jlong from, intptr_t *to) {
55 *(jlong*) (to + 1) = from;
56 }
57
58 static inline void put_long(jlong from, intptr_t *to, int& pos) {
59 *(jlong*) (to + 1 + pos) = from;
60 pos += 2;
61 }
62
63 static inline void put_long(jlong *from, intptr_t *to, int& pos) {
64 *(jlong*) (to + 1 + pos) = *from;
65 pos += 2;
66 }
67
68 // Oops are stored in native format in one JavaCallArgument slot at *to.
69 static inline void put_obj(oop from, intptr_t *to) { *(oop *)(to + 0 ) = from; }
70 static inline void put_obj(oop from, intptr_t *to, int& pos) { *(oop *)(to + pos++) = from; }
71 static inline void put_obj(oop *from, intptr_t *to, int& pos) { *(oop *)(to + pos++) = *from; }
72
73 // Floats are stored in native format in one JavaCallArgument slot at *to.
74 static inline void put_float(jfloat from, intptr_t *to) { *(jfloat *)(to + 0 ) = from; }
75 static inline void put_float(jfloat from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) = from; }
76 static inline void put_float(jfloat *from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) = *from; }
77
78 #undef _JNI_SLOT_OFFSET
79 #define _JNI_SLOT_OFFSET 1
80 // Doubles are stored in native word format in one JavaCallArgument
81 // slot at *(to+1).
82 static inline void put_double(jdouble from, intptr_t *to) {
83 *(jdouble*) (to + 1) = from;
84 }
85
86 static inline void put_double(jdouble from, intptr_t *to, int& pos) {
87 *(jdouble*) (to + 1 + pos) = from;
88 pos += 2;
89 }
90
91 static inline void put_double(jdouble *from, intptr_t *to, int& pos) {
92 *(jdouble*) (to + 1 + pos) = *from;
93 pos += 2;
94 }
95
96 // The get_xxx routines, on the other hand, actually _do_ fetch
97 // java primitive types from the interpreter stack.
98 // No need to worry about alignment on Intel.
99 static inline jint get_int (intptr_t *from) { return *(jint *) from; }
100 static inline jlong get_long (intptr_t *from) { return *(jlong *) (from + _JNI_SLOT_OFFSET); }
101 static inline oop get_obj (intptr_t *from) { return *(oop *) from; }
102 static inline jfloat get_float (intptr_t *from) { return *(jfloat *) from; }
103 static inline jdouble get_double(intptr_t *from) { return *(jdouble *)(from + _JNI_SLOT_OFFSET); }
104 #undef _JNI_SLOT_OFFSET
105 };
106
107 #endif // CPU_AARCH64_VM_JNITYPES_AARCH64_HPP