68 lines
2.7 KiB
C++
68 lines
2.7 KiB
C++
|
/*
|
||
|
|
* Copyright 2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
|
||
|
|
* CA 95054 USA or visit www.sun.com if you need additional information or
|
||
|
|
* have any questions.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
// 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;
|
||
|
|
};
|