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/*
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* Copyright 1998-2003 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*
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*/
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// This file holds platform-dependent routines used to write primitive jni
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// types to the array of arguments passed into JavaCalls::call
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class JNITypes : AllStatic {
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// These functions write a java primitive type (in native format)
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// to a java stack slot array to be passed as an argument to JavaCalls:calls.
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// I.e., they are functionally 'push' operations if they have a 'pos'
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// formal parameter. Note that jlong's and jdouble's are written
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// _in reverse_ of the order in which they appear in the interpreter
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// stack. This is because call stubs (see stubGenerator_sparc.cpp)
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// reverse the argument list constructed by JavaCallArguments (see
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// javaCalls.hpp).
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private:
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#ifndef AMD64
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// 32bit Helper routines.
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static inline void put_int2r(jint *from, intptr_t *to) { *(jint *)(to++) = from[1];
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*(jint *)(to ) = from[0]; }
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static inline void put_int2r(jint *from, intptr_t *to, int& pos) { put_int2r(from, to + pos); pos += 2; }
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#endif // AMD64
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public:
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// Ints are stored in native format in one JavaCallArgument slot at *to.
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static inline void put_int(jint from, intptr_t *to) { *(jint *)(to + 0 ) = from; }
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static inline void put_int(jint from, intptr_t *to, int& pos) { *(jint *)(to + pos++) = from; }
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static inline void put_int(jint *from, intptr_t *to, int& pos) { *(jint *)(to + pos++) = *from; }
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#ifdef AMD64
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// Longs are stored in native format in one JavaCallArgument slot at
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// *(to+1).
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static inline void put_long(jlong from, intptr_t *to) {
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*(jlong*) (to + 1) = from;
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}
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static inline void put_long(jlong from, intptr_t *to, int& pos) {
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*(jlong*) (to + 1 + pos) = from;
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pos += 2;
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}
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static inline void put_long(jlong *from, intptr_t *to, int& pos) {
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*(jlong*) (to + 1 + pos) = *from;
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pos += 2;
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}
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#else
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// Longs are stored in big-endian word format in two JavaCallArgument slots at *to.
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// The high half is in *to and the low half in *(to+1).
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static inline void put_long(jlong from, intptr_t *to) { put_int2r((jint *)&from, to); }
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static inline void put_long(jlong from, intptr_t *to, int& pos) { put_int2r((jint *)&from, to, pos); }
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static inline void put_long(jlong *from, intptr_t *to, int& pos) { put_int2r((jint *) from, to, pos); }
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#endif // AMD64
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// Oops are stored in native format in one JavaCallArgument slot at *to.
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static inline void put_obj(oop from, intptr_t *to) { *(oop *)(to + 0 ) = from; }
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static inline void put_obj(oop from, intptr_t *to, int& pos) { *(oop *)(to + pos++) = from; }
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static inline void put_obj(oop *from, intptr_t *to, int& pos) { *(oop *)(to + pos++) = *from; }
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// Floats are stored in native format in one JavaCallArgument slot at *to.
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static inline void put_float(jfloat from, intptr_t *to) { *(jfloat *)(to + 0 ) = from; }
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static inline void put_float(jfloat from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) = from; }
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static inline void put_float(jfloat *from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) = *from; }
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#undef _JNI_SLOT_OFFSET
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#ifdef AMD64
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#define _JNI_SLOT_OFFSET 1
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// Doubles are stored in native word format in one JavaCallArgument
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// slot at *(to+1).
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static inline void put_double(jdouble from, intptr_t *to) {
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*(jdouble*) (to + 1) = from;
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}
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static inline void put_double(jdouble from, intptr_t *to, int& pos) {
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*(jdouble*) (to + 1 + pos) = from;
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pos += 2;
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}
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static inline void put_double(jdouble *from, intptr_t *to, int& pos) {
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*(jdouble*) (to + 1 + pos) = *from;
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pos += 2;
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}
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#else
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#define _JNI_SLOT_OFFSET 0
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// Doubles are stored in big-endian word format in two JavaCallArgument slots at *to.
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// The high half is in *to and the low half in *(to+1).
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static inline void put_double(jdouble from, intptr_t *to) { put_int2r((jint *)&from, to); }
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static inline void put_double(jdouble from, intptr_t *to, int& pos) { put_int2r((jint *)&from, to, pos); }
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static inline void put_double(jdouble *from, intptr_t *to, int& pos) { put_int2r((jint *) from, to, pos); }
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#endif // AMD64
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// The get_xxx routines, on the other hand, actually _do_ fetch
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// java primitive types from the interpreter stack.
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// No need to worry about alignment on Intel.
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static inline jint get_int (intptr_t *from) { return *(jint *) from; }
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static inline jlong get_long (intptr_t *from) { return *(jlong *) (from + _JNI_SLOT_OFFSET); }
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static inline oop get_obj (intptr_t *from) { return *(oop *) from; }
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static inline jfloat get_float (intptr_t *from) { return *(jfloat *) from; }
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static inline jdouble get_double(intptr_t *from) { return *(jdouble *)(from + _JNI_SLOT_OFFSET); }
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#undef _JNI_SLOT_OFFSET
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};
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