1 /*
2 * Copyright (c) 2008, 2017, 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.
22 *
23 */
24
25 #ifndef CPU_ARM_VM_JNITYPES_ARM_HPP
26 #define CPU_ARM_VM_JNITYPES_ARM_HPP
27
28 #include "jni.h"
29 #include "memory/allocation.hpp"
30 #include "oops/oop.hpp"
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
35 class 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
45 private:
46
47 // 32bit Helper routines.
48 static inline void put_int2r(jint *from, intptr_t *to) { *(jint *)(to++) = from[1];
49 *(jint *)(to ) = from[0]; }
50 static inline void put_int2r(jint *from, intptr_t *to, int& pos) { put_int2r(from, to + pos); pos += 2; }
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 big-endian word format in two JavaCallArgument slots at *to.
59 // The high half is in *to and the low half in *(to+1).
60 static inline void put_long(jlong from, intptr_t *to) { put_int2r((jint *)&from, to); }
61 static inline void put_long(jlong from, intptr_t *to, int& pos) { put_int2r((jint *)&from, to, pos); }
62 static inline void put_long(jlong *from, intptr_t *to, int& pos) { put_int2r((jint *) from, to, pos); }
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 // Doubles are stored in big-endian word format in two JavaCallArgument slots at *to.
75 // The high half is in *to and the low half in *(to+1).
76 static inline void put_double(jdouble from, intptr_t *to) { put_int2r((jint *)&from, to); }
77 static inline void put_double(jdouble from, intptr_t *to, int& pos) { put_int2r((jint *)&from, to, pos); }
78 static inline void put_double(jdouble *from, intptr_t *to, int& pos) { put_int2r((jint *) from, to, pos); }
79
80 };
81
82 #endif // CPU_ARM_VM_JNITYPES_ARM_HPP