1 /* 2 * Copyright (c) 1998, 2019, 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_JNITYPES_X86_HPP 26 #define CPU_X86_JNITYPES_X86_HPP 27 28 #include "jni.h" 29 #include "memory/allocation.hpp" 30 #include "oops/oop.hpp" 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_sparc.cpp) 42 // reverse the argument list constructed by JavaCallArguments (see 43 // javaCalls.hpp). 44 45 private: 46 47 #ifndef AMD64 48 // 32bit Helper routines. put_int2r(jint * from,intptr_t * to)49 static inline void put_int2r(jint *from, intptr_t *to) { *(jint *)(to++) = from[1]; 50 *(jint *)(to ) = from[0]; } put_int2r(jint * from,intptr_t * to,int & pos)51 static inline void put_int2r(jint *from, intptr_t *to, int& pos) { put_int2r(from, to + pos); pos += 2; } 52 #endif // AMD64 53 54 public: 55 // Ints are stored in native format in one JavaCallArgument slot at *to. put_int(jint from,intptr_t * to)56 static inline void put_int(jint from, intptr_t *to) { *(jint *)(to + 0 ) = from; } put_int(jint from,intptr_t * to,int & pos)57 static inline void put_int(jint from, intptr_t *to, int& pos) { *(jint *)(to + pos++) = from; } put_int(jint * from,intptr_t * to,int & pos)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). put_long(jlong from,intptr_t * to)63 static inline void put_long(jlong from, intptr_t *to) { 64 *(jlong*) (to + 1) = from; 65 } 66 put_long(jlong from,intptr_t * to,int & pos)67 static inline void put_long(jlong from, intptr_t *to, int& pos) { 68 *(jlong*) (to + 1 + pos) = from; 69 pos += 2; 70 } 71 put_long(jlong * from,intptr_t * to,int & pos)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). put_long(jlong from,intptr_t * to)79 static inline void put_long(jlong from, intptr_t *to) { put_int2r((jint *)&from, to); } put_long(jlong from,intptr_t * to,int & pos)80 static inline void put_long(jlong from, intptr_t *to, int& pos) { put_int2r((jint *)&from, to, pos); } put_long(jlong * from,intptr_t * to,int & 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. put_obj(oop from,intptr_t * to)85 static inline void put_obj(oop from, intptr_t *to) { *(oop *)(to + 0 ) = from; } put_obj(oop from,intptr_t * to,int & pos)86 static inline void put_obj(oop from, intptr_t *to, int& pos) { *(oop *)(to + pos++) = from; } put_obj(oop * from,intptr_t * to,int & pos)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. put_float(jfloat from,intptr_t * to)90 static inline void put_float(jfloat from, intptr_t *to) { *(jfloat *)(to + 0 ) = from; } put_float(jfloat from,intptr_t * to,int & pos)91 static inline void put_float(jfloat from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) = from; } put_float(jfloat * from,intptr_t * to,int & pos)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). put_double(jdouble from,intptr_t * to)99 static inline void put_double(jdouble from, intptr_t *to) { 100 *(jdouble*) (to + 1) = from; 101 } 102 put_double(jdouble from,intptr_t * to,int & pos)103 static inline void put_double(jdouble from, intptr_t *to, int& pos) { 104 *(jdouble*) (to + 1 + pos) = from; 105 pos += 2; 106 } 107 put_double(jdouble * from,intptr_t * to,int & pos)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). put_double(jdouble from,intptr_t * to)116 static inline void put_double(jdouble from, intptr_t *to) { put_int2r((jint *)&from, to); } put_double(jdouble from,intptr_t * to,int & pos)117 static inline void put_double(jdouble from, intptr_t *to, int& pos) { put_int2r((jint *)&from, to, pos); } put_double(jdouble * from,intptr_t * to,int & 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. get_int(intptr_t * from)125 static inline jint get_int (intptr_t *from) { return *(jint *) from; } get_long(intptr_t * from)126 static inline jlong get_long (intptr_t *from) { return *(jlong *) (from + _JNI_SLOT_OFFSET); } get_obj(intptr_t * from)127 static inline oop get_obj (intptr_t *from) { return *(oop *) from; } get_float(intptr_t * from)128 static inline jfloat get_float (intptr_t *from) { return *(jfloat *) from; } get_double(intptr_t * 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_JNITYPES_X86_HPP 134