1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/cpu/x86/vm/c1_FpuStackSim_x86.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,72 @@
1.4 +/*
1.5 + * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef CPU_X86_VM_C1_FPUSTACKSIM_X86_HPP
1.29 +#define CPU_X86_VM_C1_FPUSTACKSIM_X86_HPP
1.30 +
1.31 +// Simulates the FPU stack and maintains mapping [fpu-register -> stack offset]
1.32 +// FPU registers are described as numbers from 0..nof_fpu_regs-1
1.33 +
1.34 +class Compilation;
1.35 +
1.36 +class FpuStackSim VALUE_OBJ_CLASS_SPEC {
1.37 + private:
1.38 + Compilation* _compilation;
1.39 + int _stack_size;
1.40 + int _regs[FrameMap::nof_fpu_regs];
1.41 +
1.42 + int tos_index() const { return _stack_size - 1; }
1.43 +
1.44 + int regs_at(int i) const;
1.45 + void set_regs_at(int i, int val);
1.46 + void dec_stack_size();
1.47 + void inc_stack_size();
1.48 +
1.49 + // unified bailout support
1.50 + Compilation* compilation() const { return _compilation; }
1.51 + void bailout(const char* msg) const { compilation()->bailout(msg); }
1.52 + bool bailed_out() const { return compilation()->bailed_out(); }
1.53 +
1.54 + public:
1.55 + FpuStackSim(Compilation* compilation);
1.56 + void pop ();
1.57 + void pop (int rnr); // rnr must be on tos
1.58 + void push(int rnr);
1.59 + void swap(int offset); // exchange tos with tos + offset
1.60 + int offset_from_tos(int rnr) const; // return the offset of the topmost instance of rnr from TOS
1.61 + int get_slot(int tos_offset) const; // return the entry at the given offset from TOS
1.62 + void set_slot(int tos_offset, int rnr); // set the entry at the given offset from TOS
1.63 + void rename(int old_rnr, int new_rnr); // rename all instances of old_rnr to new_rnr
1.64 + bool contains(int rnr); // debugging support only
1.65 + bool is_empty();
1.66 + bool slot_is_empty(int tos_offset);
1.67 + int stack_size() const { return _stack_size; }
1.68 + void clear();
1.69 + intArray* write_state();
1.70 + void read_state(intArray* fpu_stack_state);
1.71 +
1.72 + void print() PRODUCT_RETURN;
1.73 +};
1.74 +
1.75 +#endif // CPU_X86_VM_C1_FPUSTACKSIM_X86_HPP
