author | chegar |
Wed, 16 Dec 2015 12:17:03 +0000 | |
changeset 34705 | 228508cfabc4 |
parent 7397 | 5b173b4ca846 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#ifndef CPU_X86_VM_C1_FPUSTACKSIM_X86_HPP |
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#define CPU_X86_VM_C1_FPUSTACKSIM_X86_HPP |
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// Simulates the FPU stack and maintains mapping [fpu-register -> stack offset] |
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// FPU registers are described as numbers from 0..nof_fpu_regs-1 |
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class Compilation; |
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class FpuStackSim VALUE_OBJ_CLASS_SPEC { |
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private: |
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Compilation* _compilation; |
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int _stack_size; |
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int _regs[FrameMap::nof_fpu_regs]; |
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int tos_index() const { return _stack_size - 1; } |
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int regs_at(int i) const; |
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void set_regs_at(int i, int val); |
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void dec_stack_size(); |
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void inc_stack_size(); |
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// unified bailout support |
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Compilation* compilation() const { return _compilation; } |
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void bailout(const char* msg) const { compilation()->bailout(msg); } |
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bool bailed_out() const { return compilation()->bailed_out(); } |
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public: |
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FpuStackSim(Compilation* compilation); |
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void pop (); |
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void pop (int rnr); // rnr must be on tos |
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void push(int rnr); |
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void swap(int offset); // exchange tos with tos + offset |
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int offset_from_tos(int rnr) const; // return the offset of the topmost instance of rnr from TOS |
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int get_slot(int tos_offset) const; // return the entry at the given offset from TOS |
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void set_slot(int tos_offset, int rnr); // set the entry at the given offset from TOS |
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void rename(int old_rnr, int new_rnr); // rename all instances of old_rnr to new_rnr |
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bool contains(int rnr); // debugging support only |
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bool is_empty(); |
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bool slot_is_empty(int tos_offset); |
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int stack_size() const { return _stack_size; } |
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void clear(); |
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intArray* write_state(); |
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void read_state(intArray* fpu_stack_state); |
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void print() PRODUCT_RETURN; |
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}; |
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#endif // CPU_X86_VM_C1_FPUSTACKSIM_X86_HPP |