c1_FpuStackSim_x86.hpp revision 1472
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* 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).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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// 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:
int _stack_size;
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
public:
void pop ();
bool is_empty();
bool slot_is_empty(int tos_offset);
int stack_size() const { return _stack_size; }
void clear();
intArray* write_state();
void print() PRODUCT_RETURN;
};