branch64.hh revision 12616:4b463b4dc098 
1/*
2 * Copyright (c) 2011-2013 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder.  You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions are
16 * met: redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer;
18 * redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution;
21 * neither the name of the copyright holders nor the names of its
22 * contributors may be used to endorse or promote products derived from
23 * this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * Authors: Gabe Black
38 */
39#ifndef __ARCH_ARM_INSTS_BRANCH64_HH__
40#define __ARCH_ARM_INSTS_BRANCH64_HH__
41
42#include "arch/arm/insts/static_inst.hh"
43
44namespace ArmISA
45{
46// Branch to a target computed with an immediate
47class BranchImm64 : public ArmStaticInst
48{
49  protected:
50    int64_t imm;
51
52  public:
53    BranchImm64(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
54                int64_t _imm) :
55        ArmStaticInst(mnem, _machInst, __opClass), imm(_imm)
56    {}
57
58    ArmISA::PCState branchTarget(
59            const ArmISA::PCState &branchPC) const override;
60
61    /// Explicitly import the otherwise hidden branchTarget
62    using StaticInst::branchTarget;
63
64    std::string generateDisassembly(
65            Addr pc, const SymbolTable *symtab) const override;
66};
67
68// Conditionally Branch to a target computed with an immediate
69class BranchImmCond64 : public BranchImm64
70{
71  protected:
72    ConditionCode condCode;
73
74  public:
75    BranchImmCond64(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
76                    int64_t _imm, ConditionCode _condCode) :
77        BranchImm64(mnem, _machInst, __opClass, _imm), condCode(_condCode)
78    {}
79
80    std::string generateDisassembly(
81            Addr pc, const SymbolTable *symtab) const override;
82};
83
84// Branch to a target computed with a register
85class BranchReg64 : public ArmStaticInst
86{
87  protected:
88    IntRegIndex op1;
89
90  public:
91    BranchReg64(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
92                IntRegIndex _op1) :
93        ArmStaticInst(mnem, _machInst, __opClass), op1(_op1)
94    {}
95
96    std::string generateDisassembly(
97            Addr pc, const SymbolTable *symtab) const override;
98};
99
100// Ret instruction
101class BranchRet64 : public BranchReg64
102{
103  public:
104    BranchRet64(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
105                IntRegIndex _op1) :
106        BranchReg64(mnem, _machInst, __opClass, _op1)
107    {}
108
109    std::string generateDisassembly(
110            Addr pc, const SymbolTable *symtab) const override;
111};
112
113// Eret instruction
114class BranchEret64 : public ArmStaticInst
115{
116  public:
117    BranchEret64(const char *mnem, ExtMachInst _machInst, OpClass __opClass) :
118        ArmStaticInst(mnem, _machInst, __opClass)
119    {}
120
121    std::string generateDisassembly(
122            Addr pc, const SymbolTable *symtab) const override;
123};
124
125// Branch to a target computed with an immediate and a register
126class BranchImmReg64 : public ArmStaticInst
127{
128  protected:
129    int64_t imm;
130    IntRegIndex op1;
131
132  public:
133    BranchImmReg64(const char *mnem, ExtMachInst _machInst, OpClass __opClass,
134                   int64_t _imm, IntRegIndex _op1) :
135        ArmStaticInst(mnem, _machInst, __opClass), imm(_imm), op1(_op1)
136    {}
137
138    ArmISA::PCState branchTarget(
139            const ArmISA::PCState &branchPC) const override;
140
141    /// Explicitly import the otherwise hidden branchTarget
142    using StaticInst::branchTarget;
143
144    std::string generateDisassembly(
145            Addr pc, const SymbolTable *symtab) const override;
146};
147
148// Branch to a target computed with two immediates
149class BranchImmImmReg64 : public ArmStaticInst
150{
151  protected:
152    int64_t imm1;
153    int64_t imm2;
154    IntRegIndex op1;
155
156  public:
157    BranchImmImmReg64(const char *mnem, ExtMachInst _machInst,
158                      OpClass __opClass, int64_t _imm1, int64_t _imm2,
159                      IntRegIndex _op1) :
160        ArmStaticInst(mnem, _machInst, __opClass),
161        imm1(_imm1), imm2(_imm2), op1(_op1)
162    {}
163
164    ArmISA::PCState branchTarget(
165            const ArmISA::PCState &branchPC) const override;
166
167    /// Explicitly import the otherwise hidden branchTarget
168    using StaticInst::branchTarget;
169
170    std::string generateDisassembly(
171            Addr pc, const SymbolTable *symtab) const override;
172};
173
174}
175
176#endif //__ARCH_ARM_INSTS_BRANCH_HH__
177