| /* |
| * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2016 SAP SE. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef CPU_S390_VM_REGISTERSAVER_S390_HPP |
| #define CPU_S390_VM_REGISTERSAVER_S390_HPP |
| |
| class RegisterSaver { |
| // Used for saving volatile registers. |
| |
| // Class declaration moved to separate file to make it available elsewhere. |
| // Implementation remains in sharedRuntime_s390.cpp |
| |
| public: |
| |
| // Set of registers to be saved. |
| typedef enum { |
| all_registers, |
| all_registers_except_r2, |
| all_integer_registers, |
| all_volatile_registers, // According to ABI calling convention. |
| arg_registers |
| } RegisterSet; |
| |
| // Boolean flags to force only argument registers to be saved. |
| static int live_reg_save_size(RegisterSet reg_set); |
| static int live_reg_frame_size(RegisterSet reg_set); |
| // Specify the register that should be stored as the return pc in the current frame. |
| static OopMap* save_live_registers(MacroAssembler* masm, RegisterSet reg_set, Register return_pc = Z_R14); |
| static void restore_live_registers(MacroAssembler* masm, RegisterSet reg_set); |
| |
| // Generate the OopMap (again, regs where saved before). |
| static OopMap* generate_oop_map(MacroAssembler* masm, RegisterSet reg_set); |
| |
| // During deoptimization only the result register need to be restored |
| // all the other values have already been extracted. |
| static void restore_result_registers(MacroAssembler* masm); |
| |
| // Constants and data structures: |
| |
| typedef enum { |
| int_reg = 0, |
| float_reg = 1, |
| excluded_reg = 2, // Not saved/restored. |
| } RegisterType; |
| |
| typedef enum { |
| reg_size = 8, |
| half_reg_size = reg_size / 2, |
| } RegisterConstants; |
| |
| // Remember type, number, and VMReg. |
| typedef struct { |
| RegisterType reg_type; |
| int reg_num; |
| VMReg vmreg; |
| } LiveRegType; |
| |
| }; |
| |
| #endif // CPU_S390_VM_REGISTERSAVER_S390_HPP |