author | herrick |
Thu, 17 Oct 2019 07:55:35 -0400 | |
branch | JDK-8200758-branch |
changeset 58670 | 6fb9e12d5595 |
parent 53244 | 9807daeb47c4 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2016, 2019, Oracle and/or its affiliates. All rights reserved. |
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* Copyright (c) 2016 SAP SE. 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_S390_REGISTERSAVER_S390_HPP |
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#define CPU_S390_REGISTERSAVER_S390_HPP |
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class RegisterSaver { |
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// Used for saving volatile registers. |
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// Class declaration moved to separate file to make it available elsewhere. |
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// Implementation remains in sharedRuntime_s390.cpp |
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public: |
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// Set of registers to be saved. |
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typedef enum { |
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all_registers, |
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all_registers_except_r2, |
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all_integer_registers, |
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all_volatile_registers, // According to ABI calling convention. |
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arg_registers |
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} RegisterSet; |
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// Boolean flags to force only argument registers to be saved. |
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static int live_reg_save_size(RegisterSet reg_set); |
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static int live_reg_frame_size(RegisterSet reg_set); |
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// Specify the register that should be stored as the return pc in the current frame. |
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static OopMap* save_live_registers(MacroAssembler* masm, RegisterSet reg_set, Register return_pc = Z_R14); |
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static void restore_live_registers(MacroAssembler* masm, RegisterSet reg_set); |
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// Generate the OopMap (again, regs where saved before). |
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static OopMap* generate_oop_map(MacroAssembler* masm, RegisterSet reg_set); |
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// During deoptimization only the result register need to be restored |
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// all the other values have already been extracted. |
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static void restore_result_registers(MacroAssembler* masm); |
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// Constants and data structures: |
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typedef enum { |
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int_reg = 0, |
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float_reg = 1, |
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excluded_reg = 2, // Not saved/restored. |
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} RegisterType; |
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typedef enum { |
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reg_size = 8, |
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half_reg_size = reg_size / 2, |
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} RegisterConstants; |
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// Remember type, number, and VMReg. |
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typedef struct { |
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RegisterType reg_type; |
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int reg_num; |
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VMReg vmreg; |
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} LiveRegType; |
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}; |
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#endif // CPU_S390_REGISTERSAVER_S390_HPP |