Mercurial > hg > graal-compiler
diff src/cpu/x86/vm/c1_FpuStackSim_x86.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/cpu/x86/vm/c1_FpuStackSim_x86.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,67 @@ +/* + * 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; +};