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src/cpu/x86/vm/c1_FpuStackSim_x86.hpp@f90c822e73f8 (annotated)

src/cpu/x86/vm/c1_FpuStackSim_x86.hpp

Wed, 27 Apr 2016 01:25:04 +0800

author

aoqi

date

Wed, 27 Apr 2016 01:25:04 +0800

changeset 0

f90c822e73f8

child 6876

710a3c8b516e

permissions

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http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	#ifndef CPU_X86_VM_C1_FPUSTACKSIM_X86_HPP
aoqi@0	26	#define CPU_X86_VM_C1_FPUSTACKSIM_X86_HPP
aoqi@0	27
aoqi@0	28	// Simulates the FPU stack and maintains mapping [fpu-register -> stack offset]
aoqi@0	29	// FPU registers are described as numbers from 0..nof_fpu_regs-1
aoqi@0	30
aoqi@0	31	class Compilation;
aoqi@0	32
aoqi@0	33	class FpuStackSim VALUE_OBJ_CLASS_SPEC {
aoqi@0	34	private:
aoqi@0	35	Compilation* _compilation;
aoqi@0	36	int _stack_size;
aoqi@0	37	int _regs[FrameMap::nof_fpu_regs];
aoqi@0	38
aoqi@0	39	int tos_index() const { return _stack_size - 1; }
aoqi@0	40
aoqi@0	41	int regs_at(int i) const;
aoqi@0	42	void set_regs_at(int i, int val);
aoqi@0	43	void dec_stack_size();
aoqi@0	44	void inc_stack_size();
aoqi@0	45
aoqi@0	46	// unified bailout support
aoqi@0	47	Compilation* compilation() const { return _compilation; }
aoqi@0	48	void bailout(const char* msg) const { compilation()->bailout(msg); }
aoqi@0	49	bool bailed_out() const { return compilation()->bailed_out(); }
aoqi@0	50
aoqi@0	51	public:
aoqi@0	52	FpuStackSim(Compilation* compilation);
aoqi@0	53	void pop ();
aoqi@0	54	void pop (int rnr); // rnr must be on tos
aoqi@0	55	void push(int rnr);
aoqi@0	56	void swap(int offset); // exchange tos with tos + offset
aoqi@0	57	int offset_from_tos(int rnr) const; // return the offset of the topmost instance of rnr from TOS
aoqi@0	58	int get_slot(int tos_offset) const; // return the entry at the given offset from TOS
aoqi@0	59	void set_slot(int tos_offset, int rnr); // set the entry at the given offset from TOS
aoqi@0	60	void rename(int old_rnr, int new_rnr); // rename all instances of old_rnr to new_rnr
aoqi@0	61	bool contains(int rnr); // debugging support only
aoqi@0	62	bool is_empty();
aoqi@0	63	bool slot_is_empty(int tos_offset);
aoqi@0	64	int stack_size() const { return _stack_size; }
aoqi@0	65	void clear();
aoqi@0	66	intArray* write_state();
aoqi@0	67	void read_state(intArray* fpu_stack_state);
aoqi@0	68
aoqi@0	69	void print() PRODUCT_RETURN;
aoqi@0	70	};
aoqi@0	71
aoqi@0	72	#endif // CPU_X86_VM_C1_FPUSTACKSIM_X86_HPP