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src/cpu/x86/vm/jniTypes_x86.hpp@e9ff18c4ace7 (annotated)

src/cpu/x86/vm/jniTypes_x86.hpp

Wed, 02 Jun 2010 22:45:42 -0700

author

jrose

date

Wed, 02 Jun 2010 22:45:42 -0700

changeset 1934

e9ff18c4ace7

parent 1907

c18cbe5936b8

child 2314

f95d63e2154a

permissions

-rw-r--r--

Merge

duke@435	1	/*
trims@1907	2	* Copyright (c) 1998, 2003, Oracle and/or its affiliates. All rights reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	// This file holds platform-dependent routines used to write primitive jni
duke@435	26	// types to the array of arguments passed into JavaCalls::call
duke@435	27
duke@435	28	class JNITypes : AllStatic {
duke@435	29	// These functions write a java primitive type (in native format)
duke@435	30	// to a java stack slot array to be passed as an argument to JavaCalls:calls.
duke@435	31	// I.e., they are functionally 'push' operations if they have a 'pos'
duke@435	32	// formal parameter. Note that jlong's and jdouble's are written
duke@435	33	// _in reverse_ of the order in which they appear in the interpreter
duke@435	34	// stack. This is because call stubs (see stubGenerator_sparc.cpp)
duke@435	35	// reverse the argument list constructed by JavaCallArguments (see
duke@435	36	// javaCalls.hpp).
duke@435	37
duke@435	38	private:
duke@435	39
duke@435	40	#ifndef AMD64
duke@435	41	// 32bit Helper routines.
duke@435	42	static inline void put_int2r(jint *from, intptr_t *to) { *(jint *)(to++) = from[1];
duke@435	43	*(jint *)(to ) = from[0]; }
duke@435	44	static inline void put_int2r(jint *from, intptr_t *to, int& pos) { put_int2r(from, to + pos); pos += 2; }
duke@435	45	#endif // AMD64
duke@435	46
duke@435	47	public:
duke@435	48	// Ints are stored in native format in one JavaCallArgument slot at *to.
duke@435	49	static inline void put_int(jint from, intptr_t *to) { *(jint *)(to + 0 ) = from; }
duke@435	50	static inline void put_int(jint from, intptr_t *to, int& pos) { *(jint *)(to + pos++) = from; }
duke@435	51	static inline void put_int(jint *from, intptr_t *to, int& pos) { *(jint *)(to + pos++) = *from; }
duke@435	52
duke@435	53	#ifdef AMD64
duke@435	54	// Longs are stored in native format in one JavaCallArgument slot at
duke@435	55	// *(to+1).
duke@435	56	static inline void put_long(jlong from, intptr_t *to) {
duke@435	57	*(jlong*) (to + 1) = from;
duke@435	58	}
duke@435	59
duke@435	60	static inline void put_long(jlong from, intptr_t *to, int& pos) {
duke@435	61	*(jlong*) (to + 1 + pos) = from;
duke@435	62	pos += 2;
duke@435	63	}
duke@435	64
duke@435	65	static inline void put_long(jlong *from, intptr_t *to, int& pos) {
duke@435	66	*(jlong*) (to + 1 + pos) = *from;
duke@435	67	pos += 2;
duke@435	68	}
duke@435	69	#else
duke@435	70	// Longs are stored in big-endian word format in two JavaCallArgument slots at *to.
duke@435	71	// The high half is in *to and the low half in *(to+1).
duke@435	72	static inline void put_long(jlong from, intptr_t *to) { put_int2r((jint *)&from, to); }
duke@435	73	static inline void put_long(jlong from, intptr_t *to, int& pos) { put_int2r((jint *)&from, to, pos); }
duke@435	74	static inline void put_long(jlong *from, intptr_t *to, int& pos) { put_int2r((jint *) from, to, pos); }
duke@435	75	#endif // AMD64
duke@435	76
duke@435	77	// Oops are stored in native format in one JavaCallArgument slot at *to.
duke@435	78	static inline void put_obj(oop from, intptr_t *to) { *(oop *)(to + 0 ) = from; }
duke@435	79	static inline void put_obj(oop from, intptr_t *to, int& pos) { *(oop *)(to + pos++) = from; }
duke@435	80	static inline void put_obj(oop *from, intptr_t *to, int& pos) { *(oop *)(to + pos++) = *from; }
duke@435	81
duke@435	82	// Floats are stored in native format in one JavaCallArgument slot at *to.
duke@435	83	static inline void put_float(jfloat from, intptr_t *to) { *(jfloat *)(to + 0 ) = from; }
duke@435	84	static inline void put_float(jfloat from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) = from; }
duke@435	85	static inline void put_float(jfloat *from, intptr_t *to, int& pos) { *(jfloat *)(to + pos++) = *from; }
duke@435	86
duke@435	87	#undef _JNI_SLOT_OFFSET
duke@435	88	#ifdef AMD64
duke@435	89	#define _JNI_SLOT_OFFSET 1
duke@435	90	// Doubles are stored in native word format in one JavaCallArgument
duke@435	91	// slot at *(to+1).
duke@435	92	static inline void put_double(jdouble from, intptr_t *to) {
duke@435	93	*(jdouble*) (to + 1) = from;
duke@435	94	}
duke@435	95
duke@435	96	static inline void put_double(jdouble from, intptr_t *to, int& pos) {
duke@435	97	*(jdouble*) (to + 1 + pos) = from;
duke@435	98	pos += 2;
duke@435	99	}
duke@435	100
duke@435	101	static inline void put_double(jdouble *from, intptr_t *to, int& pos) {
duke@435	102	*(jdouble*) (to + 1 + pos) = *from;
duke@435	103	pos += 2;
duke@435	104	}
duke@435	105	#else
duke@435	106	#define _JNI_SLOT_OFFSET 0
duke@435	107	// Doubles are stored in big-endian word format in two JavaCallArgument slots at *to.
duke@435	108	// The high half is in *to and the low half in *(to+1).
duke@435	109	static inline void put_double(jdouble from, intptr_t *to) { put_int2r((jint *)&from, to); }
duke@435	110	static inline void put_double(jdouble from, intptr_t *to, int& pos) { put_int2r((jint *)&from, to, pos); }
duke@435	111	static inline void put_double(jdouble *from, intptr_t *to, int& pos) { put_int2r((jint *) from, to, pos); }
duke@435	112	#endif // AMD64
duke@435	113
duke@435	114
duke@435	115	// The get_xxx routines, on the other hand, actually _do_ fetch
duke@435	116	// java primitive types from the interpreter stack.
duke@435	117	// No need to worry about alignment on Intel.
duke@435	118	static inline jint get_int (intptr_t *from) { return *(jint *) from; }
duke@435	119	static inline jlong get_long (intptr_t *from) { return *(jlong *) (from + _JNI_SLOT_OFFSET); }
duke@435	120	static inline oop get_obj (intptr_t *from) { return *(oop *) from; }
duke@435	121	static inline jfloat get_float (intptr_t *from) { return *(jfloat *) from; }
duke@435	122	static inline jdouble get_double(intptr_t *from) { return *(jdouble *)(from + _JNI_SLOT_OFFSET); }
duke@435	123	#undef _JNI_SLOT_OFFSET
duke@435	124	};