jniTypes_x86.hpp revision 1472:c18cbe5936b8
1/* 2 * Copyright (c) 1998, 2003, 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// This file holds platform-dependent routines used to write primitive jni 26// types to the array of arguments passed into JavaCalls::call 27 28class JNITypes : AllStatic { 29 // These functions write a java primitive type (in native format) 30 // to a java stack slot array to be passed as an argument to JavaCalls:calls. 31 // I.e., they are functionally 'push' operations if they have a 'pos' 32 // formal parameter. Note that jlong's and jdouble's are written 33 // _in reverse_ of the order in which they appear in the interpreter 34 // stack. This is because call stubs (see stubGenerator_sparc.cpp) 35 // reverse the argument list constructed by JavaCallArguments (see 36 // javaCalls.hpp). 37 38private: 39 40#ifndef AMD64 41 // 32bit Helper routines. 42 static inline void put_int2r(jint *from, intptr_t *to) { *(jint *)(to++) = from[1]; 43 *(jint *)(to ) = from[0]; } 44 static inline void put_int2r(jint *from, intptr_t *to, int& pos) { put_int2r(from, to + pos); pos += 2; } 45#endif // AMD64 46 47public: 48 // Ints are stored in native format in one JavaCallArgument slot at *to. 49 static inline void put_int(jint from, intptr_t *to) { *(jint *)(to + 0 ) = from; } 50 static inline void put_int(jint from, intptr_t *to, int& pos) { *(jint *)(to + pos++) = from; } 51 static inline void put_int(jint *from, intptr_t *to, int& pos) { *(jint *)(to + pos++) = *from; } 52 53#ifdef AMD64 54 // Longs are stored in native format in one JavaCallArgument slot at 55 // *(to+1). 56 static inline void put_long(jlong from, intptr_t *to) { 57 *(jlong*) (to + 1) = from; 58 } 59 60 static inline void put_long(jlong from, intptr_t *to, int& pos) { 61 *(jlong*) (to + 1 + pos) = from; 62 pos += 2; 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#else 70 // Longs are stored in big-endian word format in two JavaCallArgument slots at *to. 71 // The high half is in *to and the low half in *(to+1). 72 static inline void put_long(jlong from, intptr_t *to) { put_int2r((jint *)&from, to); } 73 static inline void put_long(jlong from, intptr_t *to, int& pos) { put_int2r((jint *)&from, to, pos); } 74 static inline void put_long(jlong *from, intptr_t *to, int& pos) { put_int2r((jint *) from, to, pos); } 75#endif // AMD64 76 77 // Oops are stored in native format in one JavaCallArgument slot at *to. 78 static inline void put_obj(oop from, intptr_t *to) { *(oop *)(to + 0 ) = from; } 79 static inline void put_obj(oop from, intptr_t *to, int& pos) { *(oop *)(to + pos++) = from; } 80 static inline void put_obj(oop *from, intptr_t *to, int& pos) { *(oop *)(to + pos++) = *from; } 81 82 // Floats are stored in native format in one JavaCallArgument slot at *to. 83 static inline void put_float(jfloat from, intptr_t *to) { *(jfloat *)(to + 0 ) = from; } 84 static inline void put_float(jfloat from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) = from; } 85 static inline void put_float(jfloat *from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) = *from; } 86 87#undef _JNI_SLOT_OFFSET 88#ifdef AMD64 89#define _JNI_SLOT_OFFSET 1 90 // Doubles are stored in native word format in one JavaCallArgument 91 // slot at *(to+1). 92 static inline void put_double(jdouble from, intptr_t *to) { 93 *(jdouble*) (to + 1) = from; 94 } 95 96 static inline void put_double(jdouble from, intptr_t *to, int& pos) { 97 *(jdouble*) (to + 1 + pos) = from; 98 pos += 2; 99 } 100 101 static inline void put_double(jdouble *from, intptr_t *to, int& pos) { 102 *(jdouble*) (to + 1 + pos) = *from; 103 pos += 2; 104 } 105#else 106#define _JNI_SLOT_OFFSET 0 107 // Doubles are stored in big-endian word format in two JavaCallArgument slots at *to. 108 // The high half is in *to and the low half in *(to+1). 109 static inline void put_double(jdouble from, intptr_t *to) { put_int2r((jint *)&from, to); } 110 static inline void put_double(jdouble from, intptr_t *to, int& pos) { put_int2r((jint *)&from, to, pos); } 111 static inline void put_double(jdouble *from, intptr_t *to, int& pos) { put_int2r((jint *) from, to, pos); } 112#endif // AMD64 113 114 115 // The get_xxx routines, on the other hand, actually _do_ fetch 116 // java primitive types from the interpreter stack. 117 // No need to worry about alignment on Intel. 118 static inline jint get_int (intptr_t *from) { return *(jint *) from; } 119 static inline jlong get_long (intptr_t *from) { return *(jlong *) (from + _JNI_SLOT_OFFSET); } 120 static inline oop get_obj (intptr_t *from) { return *(oop *) from; } 121 static inline jfloat get_float (intptr_t *from) { return *(jfloat *) from; } 122 static inline jdouble get_double(intptr_t *from) { return *(jdouble *)(from + _JNI_SLOT_OFFSET); } 123#undef _JNI_SLOT_OFFSET 124}; 125