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src/cpu/x86/vm/c1_FpuStackSim_x86.hpp@b130b98db9cf (annotated)

src/cpu/x86/vm/c1_FpuStackSim_x86.hpp

Wed, 23 Apr 2008 11:20:36 -0700

author

kvn

date

Wed, 23 Apr 2008 11:20:36 -0700

changeset 559

b130b98db9cf

parent 435

a61af66fc99e

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6689060: Escape Analysis does not work with Compressed Oops
Summary: 64-bits VM crashes with -XX:+AggresiveOpts (Escape Analysis + Compressed Oops)
Reviewed-by: never, sgoldman

duke@435	1	/*
duke@435	2	* Copyright 2005 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	// Simulates the FPU stack and maintains mapping [fpu-register -> stack offset]
duke@435	26	// FPU registers are described as numbers from 0..nof_fpu_regs-1
duke@435	27
duke@435	28	class Compilation;
duke@435	29
duke@435	30	class FpuStackSim VALUE_OBJ_CLASS_SPEC {
duke@435	31	private:
duke@435	32	Compilation* _compilation;
duke@435	33	int _stack_size;
duke@435	34	int _regs[FrameMap::nof_fpu_regs];
duke@435	35
duke@435	36	int tos_index() const { return _stack_size - 1; }
duke@435	37
duke@435	38	int regs_at(int i) const;
duke@435	39	void set_regs_at(int i, int val);
duke@435	40	void dec_stack_size();
duke@435	41	void inc_stack_size();
duke@435	42
duke@435	43	// unified bailout support
duke@435	44	Compilation* compilation() const { return _compilation; }
duke@435	45	void bailout(const char* msg) const { compilation()->bailout(msg); }
duke@435	46	bool bailed_out() const { return compilation()->bailed_out(); }
duke@435	47
duke@435	48	public:
duke@435	49	FpuStackSim(Compilation* compilation);
duke@435	50	void pop ();
duke@435	51	void pop (int rnr); // rnr must be on tos
duke@435	52	void push(int rnr);
duke@435	53	void swap(int offset); // exchange tos with tos + offset
duke@435	54	int offset_from_tos(int rnr) const; // return the offset of the topmost instance of rnr from TOS
duke@435	55	int get_slot(int tos_offset) const; // return the entry at the given offset from TOS
duke@435	56	void set_slot(int tos_offset, int rnr); // set the entry at the given offset from TOS
duke@435	57	void rename(int old_rnr, int new_rnr); // rename all instances of old_rnr to new_rnr
duke@435	58	bool contains(int rnr); // debugging support only
duke@435	59	bool is_empty();
duke@435	60	bool slot_is_empty(int tos_offset);
duke@435	61	int stack_size() const { return _stack_size; }
duke@435	62	void clear();
duke@435	63	intArray* write_state();
duke@435	64	void read_state(intArray* fpu_stack_state);
duke@435	65
duke@435	66	void print() PRODUCT_RETURN;
duke@435	67	};