1 /* 2 * Copyright (c) 1998, 2010, 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_ZERO_VM_JNITYPES_ZERO_HPP 26 #define CPU_ZERO_VM_JNITYPES_ZERO_HPP 27 28 #include "memory/allocation.hpp" 29 #include "oops/oop.hpp" 30 #include "prims/jni.h" 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_zero.cpp) 42 // reverse the argument list constructed by JavaCallArguments (see 43 // javaCalls.hpp). 44 45 private: 46 // Helper routines. 47 static inline void put_int2 (jint *from, jint *to) { to[0] = from[0]; to[1] = from[1]; } 48 static inline void put_int2 (jint *from, jint *to, int& pos) { put_int2 (from, (jint *)((intptr_t *)to + pos)); pos += 2; } 49 static inline void put_int2r(jint *from, jint *to) { to[0] = from[1]; to[1] = from[0]; } 50 static inline void put_int2r(jint *from, jint *to, int& pos) { put_int2r(from, (jint *)((intptr_t *)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 #ifdef _LP64 59 // Longs are stored in native format in one JavaCallArgument slot at *(to+1). 60 static inline void put_long(jlong from, intptr_t *to) { *(jlong *)(to + 1 + 0) = from; } 61 static inline void put_long(jlong from, intptr_t *to, int& pos) { *(jlong *)(to + 1 + pos) = from; pos += 2; } 62 static inline void put_long(jlong *from, intptr_t *to, int& pos) { *(jlong *)(to + 1 + pos) = *from; pos += 2; } 63 #else 64 // Longs are stored in reversed native word format in two JavaCallArgument slots at *to. 65 // The high half is in *(to+1) and the low half in *to. 66 static inline void put_long(jlong from, intptr_t *to) { put_int2r((jint *)&from, (jint *)to); } 67 static inline void put_long(jlong from, intptr_t *to, int& pos) { put_int2r((jint *)&from, (jint *)to, pos); } 68 static inline void put_long(jlong *from, intptr_t *to, int& pos) { put_int2r((jint *) from, (jint *)to, pos); } 69 #endif 70 71 // Oops are stored in native format in one JavaCallArgument slot at *to. 72 static inline void put_obj(oop from, intptr_t *to) { *(oop *)(to + 0 ) = from; } 73 static inline void put_obj(oop from, intptr_t *to, int& pos) { *(oop *)(to + pos++) = from; } 74 static inline void put_obj(oop *from, intptr_t *to, int& pos) { *(oop *)(to + pos++) = *from; } 75 76 // Floats are stored in native format in one JavaCallArgument slot at *to. 77 static inline void put_float(jfloat from, intptr_t *to) { *(jfloat *)(to + 0 ) = from; } 78 static inline void put_float(jfloat from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) = from; } 79 static inline void put_float(jfloat *from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) = *from; } 80 81 #ifdef _LP64 82 // Doubles are stored in native word format in one JavaCallArgument slot at *(to+1). 83 static inline void put_double(jdouble from, intptr_t *to) { *(jdouble *)(to + 1 + 0) = from; } 84 static inline void put_double(jdouble from, intptr_t *to, int& pos) { *(jdouble *)(to + 1 + pos) = from; pos += 2; } 85 static inline void put_double(jdouble *from, intptr_t *to, int& pos) { *(jdouble *)(to + 1 + pos) = *from; pos += 2; } 86 #else 87 // Doubles are stored in reversed native word format in two JavaCallArgument slots at *to. 88 static inline void put_double(jdouble from, intptr_t *to) { put_int2r((jint *)&from, (jint *)to); } 89 static inline void put_double(jdouble from, intptr_t *to, int& pos) { put_int2r((jint *)&from, (jint *)to, pos); } 90 static inline void put_double(jdouble *from, intptr_t *to, int& pos) { put_int2r((jint *) from, (jint *)to, pos); } 91 #endif 92 93 // The get_xxx routines, on the other hand, actually _do_ fetch 94 // java primitive types from the interpreter stack. 95 static inline jint get_int(intptr_t *from) { return *(jint *)from; } 96 97 #ifdef _LP64 98 static inline jlong get_long(intptr_t *from) { return *(jlong *)from; } 99 #else 100 static inline jlong get_long(intptr_t *from) { return ((jlong)(*( signed int *)((jint *)from )) << 32) | 101 ((jlong)(*(unsigned int *)((jint *)from + 1)) << 0); } 102 #endif 103 104 static inline oop get_obj(intptr_t *from) { return *(oop *)from; } 105 static inline jfloat get_float(intptr_t *from) { return *(jfloat *)from; } 106 107 #ifdef _LP64 108 static inline jdouble get_double(intptr_t *from) { return *(jdouble *)from; } 109 #else 110 static inline jdouble get_double(intptr_t *from) { jlong jl = ((jlong)(*( signed int *)((jint *)from )) << 32) | 111 ((jlong)(*(unsigned int *)((jint *)from + 1)) << 0); 112 return *(jdouble *)&jl; } 113 #endif 114 115 }; 116 117 #endif // CPU_ZERO_VM_JNITYPES_ZERO_HPP