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src/cpu/x86/vm/interpreter_x86.hpp@885ed790ecf0 (annotated)

src/cpu/x86/vm/interpreter_x86.hpp

Wed, 21 May 2008 10:45:07 -0700

author

kvn

date

Wed, 21 May 2008 10:45:07 -0700

changeset 598

885ed790ecf0

parent 435

a61af66fc99e

child 1861

2338d41fbd81

permissions

-rw-r--r--

6695810: null oop passed to encode_heap_oop_not_null
Summary: fix several problems in C2 related to Escape Analysis and Compressed Oops.
Reviewed-by: never, jrose

duke@435	1	/*
duke@435	2	* Copyright 1997-2007 Sun Microsystems, Inc. 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	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	public:
duke@435	26
duke@435	27	// Sentinel placed in the code for interpreter returns so
duke@435	28	// that i2c adapters and osr code can recognize an interpreter
duke@435	29	// return address and convert the return to a specialized
duke@435	30	// block of code to handle compiedl return values and cleaning
duke@435	31	// the fpu stack.
duke@435	32	static const int return_sentinel;
duke@435	33
duke@435	34
duke@435	35	static Address::ScaleFactor stackElementScale() {
duke@435	36	return TaggedStackInterpreter? Address::times_8 : Address::times_4;
duke@435	37	}
duke@435	38
duke@435	39	// Offset from rsp (which points to the last stack element)
duke@435	40	static int expr_offset_in_bytes(int i) { return stackElementSize()*i ; }
duke@435	41	static int expr_tag_offset_in_bytes(int i) {
duke@435	42	assert(TaggedStackInterpreter, "should not call this");
duke@435	43	return expr_offset_in_bytes(i) + wordSize;
duke@435	44	}
duke@435	45
duke@435	46	// Support for Tagged Stacks
duke@435	47
duke@435	48	// Stack index relative to tos (which points at value)
duke@435	49	static int expr_index_at(int i) {
duke@435	50	return stackElementWords() * i;
duke@435	51	}
duke@435	52
duke@435	53	static int expr_tag_index_at(int i) {
duke@435	54	assert(TaggedStackInterpreter, "should not call this");
duke@435	55	// tag is one word above java stack element
duke@435	56	return stackElementWords() * i + 1;
duke@435	57	}
duke@435	58
duke@435	59	// Already negated by c++ interpreter
duke@435	60	static int local_index_at(int i) {
duke@435	61	assert(i<=0, "local direction already negated");
duke@435	62	return stackElementWords() * i + (value_offset_in_bytes()/wordSize);
duke@435	63	}
duke@435	64
duke@435	65	static int local_tag_index_at(int i) {
duke@435	66	assert(i<=0, "local direction already negated");
duke@435	67	assert(TaggedStackInterpreter, "should not call this");
duke@435	68	return stackElementWords() * i + (tag_offset_in_bytes()/wordSize);
duke@435	69	}