1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
/* Copyright (c) 2007-2008 The Florida State University
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Stephen Hines
*/
#ifndef __ARCH_ARM_INSTS_PREDINST_HH__
#define __ARCH_ARM_INSTS_PREDINST_HH__
#include "arch/arm/insts/static_inst.hh"
#include "base/trace.hh"
namespace ArmISA
{
static inline uint32_t
rotate_imm(uint32_t immValue, int rotateValue)
{
return ((immValue >> (rotateValue & 31)) |
(immValue << (32 - (rotateValue & 31))));
}
/**
* Base class for predicated integer operations.
*/
class PredOp : public ArmStaticInst
{
protected:
ConditionCode condCode;
/// Constructor
PredOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass) :
ArmStaticInst(mnem, _machInst, __opClass),
condCode((ConditionCode)(unsigned)machInst.condCode)
{
}
};
/**
* Base class for predicated immediate operations.
*/
class PredImmOp : public PredOp
{
protected:
uint32_t imm;
uint32_t rotate;
uint32_t rotated_imm;
uint32_t rotated_carry;
/// Constructor
PredImmOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass) :
PredOp(mnem, _machInst, __opClass),
imm(machInst.imm), rotate(machInst.rotate << 1),
rotated_imm(0), rotated_carry(0)
{
rotated_imm = rotate_imm(imm, rotate);
if (rotate != 0)
rotated_carry = (rotated_imm >> 31) & 1;
}
std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
};
/**
* Base class for predicated integer operations.
*/
class PredIntOp : public PredOp
{
protected:
uint32_t shift_size;
uint32_t shift;
/// Constructor
PredIntOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass) :
PredOp(mnem, _machInst, __opClass),
shift_size(machInst.shiftSize), shift(machInst.shift)
{
}
std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
};
/**
* Base class for predicated macro-operations.
*/
class PredMacroOp : public PredOp
{
protected:
uint32_t numMicroops;
StaticInstPtr * microOps;
/// Constructor
PredMacroOp(const char *mnem, ExtMachInst _machInst, OpClass __opClass) :
PredOp(mnem, _machInst, __opClass),
numMicroops(0)
{
// We rely on the subclasses of this object to handle the
// initialization of the micro-operations, since they are
// all of variable length
flags[IsMacroop] = true;
}
~PredMacroOp()
{
if (numMicroops)
delete [] microOps;
}
StaticInstPtr
fetchMicroop(MicroPC microPC)
{
assert(microPC < numMicroops);
return microOps[microPC];
}
std::string generateDisassembly(Addr pc, const SymbolTable *symtab) const;
};
/**
* Base class for predicated micro-operations.
*/
class PredMicroop : public PredOp
{
/// Constructor
PredMicroop(const char *mnem, ExtMachInst _machInst, OpClass __opClass) :
PredOp(mnem, _machInst, __opClass)
{
flags[IsMicroop] = true;
}
};
}
#endif //__ARCH_ARM_INSTS_PREDINST_HH__
|
