1 /*
2 * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
3 * Copyright 2012, 2013 SAP AG. 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_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
36 class 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