1/* 2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2016 SAP SE. 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_S390_VM_JNITYPES_S390_HPP 27#define CPU_S390_VM_JNITYPES_S390_HPP 28 29// This file holds platform-dependent routines used to write primitive 30// jni types to the array of arguments passed into JavaCalls::call. 31 32#include "memory/allocation.hpp" 33#include "oops/oop.hpp" 34#include "prims/jni.h" 35 36class 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 jlongs and 41 // jdoubles are written _in reverse_ of the order in which they 42 // appear in the interpreter stack. This is because call stubs (see 43 // stubGenerator_s390.cpp) reverse the argument list constructed by 44 // JavaCallArguments (see 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) { 49 *(jint*) to = from; 50 } 51 52 static inline void put_int(jint from, intptr_t *to, int& pos) { 53 *(jint*) (to + pos++) = from; 54 } 55 56 static inline void put_int(jint *from, intptr_t *to, int& pos) { 57 *(jint*) (to + pos++) = *from; 58 } 59 60 // Longs are stored in native format in one JavaCallArgument slot at *(to+1). 61 static inline void put_long(jlong from, intptr_t *to) { 62 *(jlong*) (to + 1) = from; 63 } 64 65 static inline void put_long(jlong from, intptr_t *to, int& pos) { 66 *(jlong*) (to + 1 + pos) = from; 67 pos += 2; 68 } 69 70 static inline void put_long(jlong *from, intptr_t *to, int& pos) { 71 *(jlong*) (to + 1 + pos) = *from; 72 pos += 2; 73 } 74 75 // Oops are stored in native format in one JavaCallArgument slot at *to. 76 static inline void put_obj(oop from, intptr_t *to) { 77 *(oop*) to = from; 78 } 79 80 static inline void put_obj(oop from, intptr_t *to, int& pos) { 81 *(oop*) (to + pos++) = from; 82 } 83 84 static inline void put_obj(oop *from, intptr_t *to, int& pos) { 85 *(oop*) (to + pos++) = *from; 86 } 87 88 // Floats are stored in native format in one JavaCallArgument slot at *to. 89 static inline void put_float(jfloat from, intptr_t *to) { 90 *(jfloat*) to = from; 91 } 92 93 static inline void put_float(jfloat from, intptr_t *to, int& pos) { 94 *(jfloat*) (to + pos++) = from; 95 } 96 97 static inline void put_float(jfloat *from, intptr_t *to, int& pos) { 98 *(jfloat*) (to + pos++) = *from; 99 } 100 101 // Doubles are stored in native word format in one JavaCallArgument 102 // slot at *(to+1). 103 static inline void put_double(jdouble from, intptr_t *to) { 104 *(jdouble*) (to + 1) = from; 105 } 106 107 static inline void put_double(jdouble from, intptr_t *to, int& pos) { 108 *(jdouble*) (to + 1 + pos) = from; 109 pos += 2; 110 } 111 112 static inline void put_double(jdouble *from, intptr_t *to, int& pos) { 113 *(jdouble*) (to + 1 + pos) = *from; 114 pos += 2; 115 } 116 117 // The get_xxx routines, on the other hand, actually _do_ fetch 118 // java primitive types from the interpreter stack. 119 // No need to worry about alignment on z/Architecture. 120 static inline jint get_int(intptr_t *from) { 121 return *(jint*) from; 122 } 123 124 static inline jlong get_long(intptr_t *from) { 125 return *(jlong*) (from + 1); 126 } 127 128 static inline oop get_obj(intptr_t *from) { 129 return *(oop*) from; 130 } 131 132 static inline jfloat get_float(intptr_t *from) { 133 return *(jfloat*) from; 134 } 135 136 static inline jdouble get_double(intptr_t *from) { 137 return *(jdouble*) (from + 1); 138 } 139}; 140 141#endif // CPU_S390_VM_JNITYPES_S390_HPP 142