| /* |
| * Copyright (c) 2005, 2010, Oracle and/or its affiliates. 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_X86_VM_C1_FPUSTACKSIM_X86_HPP |
| #define CPU_X86_VM_C1_FPUSTACKSIM_X86_HPP |
| |
| // Simulates the FPU stack and maintains mapping [fpu-register -> stack offset] |
| // FPU registers are described as numbers from 0..nof_fpu_regs-1 |
| |
| class Compilation; |
| |
| class FpuStackSim VALUE_OBJ_CLASS_SPEC { |
| private: |
| Compilation* _compilation; |
| int _stack_size; |
| int _regs[FrameMap::nof_fpu_regs]; |
| |
| int tos_index() const { return _stack_size - 1; } |
| |
| int regs_at(int i) const; |
| void set_regs_at(int i, int val); |
| void dec_stack_size(); |
| void inc_stack_size(); |
| |
| // unified bailout support |
| Compilation* compilation() const { return _compilation; } |
| void bailout(const char* msg) const { compilation()->bailout(msg); } |
| bool bailed_out() const { return compilation()->bailed_out(); } |
| |
| public: |
| FpuStackSim(Compilation* compilation); |
| void pop (); |
| void pop (int rnr); // rnr must be on tos |
| void push(int rnr); |
| void swap(int offset); // exchange tos with tos + offset |
| int offset_from_tos(int rnr) const; // return the offset of the topmost instance of rnr from TOS |
| int get_slot(int tos_offset) const; // return the entry at the given offset from TOS |
| void set_slot(int tos_offset, int rnr); // set the entry at the given offset from TOS |
| void rename(int old_rnr, int new_rnr); // rename all instances of old_rnr to new_rnr |
| bool contains(int rnr); // debugging support only |
| bool is_empty(); |
| bool slot_is_empty(int tos_offset); |
| int stack_size() const { return _stack_size; } |
| void clear(); |
| intArray* write_state(); |
| void read_state(intArray* fpu_stack_state); |
| |
| void print() PRODUCT_RETURN; |
| }; |
| |
| #endif // CPU_X86_VM_C1_FPUSTACKSIM_X86_HPP |