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_X86_VM_JNITYPES_X86_HPP 26#define CPU_X86_VM_JNITYPES_X86_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 35class 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_sparc.cpp) 42 // reverse the argument list constructed by JavaCallArguments (see 43 // javaCalls.hpp). 44 45private: 46 47#ifndef AMD64 48 // 32bit Helper routines. 49 static inline void put_int2r(jint *from, intptr_t *to) { *(jint *)(to++) = from[1]; 50 *(jint *)(to ) = from[0]; } 51 static inline void put_int2r(jint *from, intptr_t *to, int& pos) { put_int2r(from, to + pos); pos += 2; } 52#endif // AMD64 53 54public: 55 // Ints are stored in native format in one JavaCallArgument slot at *to. 56 static inline void put_int(jint from, intptr_t *to) { *(jint *)(to + 0 ) = from; } 57 static inline void put_int(jint from, intptr_t *to, int& pos) { *(jint *)(to + pos++) = from; } 58 static inline void put_int(jint *from, intptr_t *to, int& pos) { *(jint *)(to + pos++) = *from; } 59 60#ifdef AMD64 61 // Longs are stored in native format in one JavaCallArgument slot at 62 // *(to+1). 63 static inline void put_long(jlong from, intptr_t *to) { 64 *(jlong*) (to + 1) = from; 65 } 66 67 static inline void put_long(jlong from, intptr_t *to, int& pos) { 68 *(jlong*) (to + 1 + pos) = from; 69 pos += 2; 70 } 71 72 static inline void put_long(jlong *from, intptr_t *to, int& pos) { 73 *(jlong*) (to + 1 + pos) = *from; 74 pos += 2; 75 } 76#else 77 // Longs are stored in big-endian word format in two JavaCallArgument slots at *to. 78 // The high half is in *to and the low half in *(to+1). 79 static inline void put_long(jlong from, intptr_t *to) { put_int2r((jint *)&from, to); } 80 static inline void put_long(jlong from, intptr_t *to, int& pos) { put_int2r((jint *)&from, to, pos); } 81 static inline void put_long(jlong *from, intptr_t *to, int& pos) { put_int2r((jint *) from, to, pos); } 82#endif // AMD64 83 84 // Oops are stored in native format in one JavaCallArgument slot at *to. 85 static inline void put_obj(oop from, intptr_t *to) { *(oop *)(to + 0 ) = from; } 86 static inline void put_obj(oop from, intptr_t *to, int& pos) { *(oop *)(to + pos++) = from; } 87 static inline void put_obj(oop *from, intptr_t *to, int& pos) { *(oop *)(to + pos++) = *from; } 88 89 // Floats are stored in native format in one JavaCallArgument slot at *to. 90 static inline void put_float(jfloat from, intptr_t *to) { *(jfloat *)(to + 0 ) = from; } 91 static inline void put_float(jfloat from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) = from; } 92 static inline void put_float(jfloat *from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) = *from; } 93 94#undef _JNI_SLOT_OFFSET 95#ifdef AMD64 96#define _JNI_SLOT_OFFSET 1 97 // Doubles are stored in native word format in one JavaCallArgument 98 // slot at *(to+1). 99 static inline void put_double(jdouble from, intptr_t *to) { 100 *(jdouble*) (to + 1) = from; 101 } 102 103 static inline void put_double(jdouble from, intptr_t *to, int& pos) { 104 *(jdouble*) (to + 1 + pos) = from; 105 pos += 2; 106 } 107 108 static inline void put_double(jdouble *from, intptr_t *to, int& pos) { 109 *(jdouble*) (to + 1 + pos) = *from; 110 pos += 2; 111 } 112#else 113#define _JNI_SLOT_OFFSET 0 114 // Doubles are stored in big-endian word format in two JavaCallArgument slots at *to. 115 // The high half is in *to and the low half in *(to+1). 116 static inline void put_double(jdouble from, intptr_t *to) { put_int2r((jint *)&from, to); } 117 static inline void put_double(jdouble from, intptr_t *to, int& pos) { put_int2r((jint *)&from, to, pos); } 118 static inline void put_double(jdouble *from, intptr_t *to, int& pos) { put_int2r((jint *) from, to, pos); } 119#endif // AMD64 120 121 122 // The get_xxx routines, on the other hand, actually _do_ fetch 123 // java primitive types from the interpreter stack. 124 // No need to worry about alignment on Intel. 125 static inline jint get_int (intptr_t *from) { return *(jint *) from; } 126 static inline jlong get_long (intptr_t *from) { return *(jlong *) (from + _JNI_SLOT_OFFSET); } 127 static inline oop get_obj (intptr_t *from) { return *(oop *) from; } 128 static inline jfloat get_float (intptr_t *from) { return *(jfloat *) from; } 129 static inline jdouble get_double(intptr_t *from) { return *(jdouble *)(from + _JNI_SLOT_OFFSET); } 130#undef _JNI_SLOT_OFFSET 131}; 132 133#endif // CPU_X86_VM_JNITYPES_X86_HPP 134