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
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
/*
* Copyright (c) 2013-2014 ARM Limited
* All rights reserved.
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* 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: Andrew Bardsley
*/
/*
* These classes define an expression language over uint64_t with only
* a few operators. This can be used to form expressions for the extra
* delay required in variable execution time instructions.
*
* Expressions, in evaluation, will have access to the ThreadContext and
* a StaticInst.
*/
#ifndef __CPU_TIMING_EXPR_HH__
#define __CPU_TIMING_EXPR_HH__
#include "cpu/static_inst.hh"
#include "cpu/thread_context.hh"
#include "enums/TimingExprOp.hh"
#include "params/TimingExpr.hh"
#include "params/TimingExprBin.hh"
#include "params/TimingExprIf.hh"
#include "params/TimingExprLet.hh"
#include "params/TimingExprLiteral.hh"
#include "params/TimingExprReadIntReg.hh"
#include "params/TimingExprRef.hh"
#include "params/TimingExprSrcReg.hh"
#include "params/TimingExprUn.hh"
#include "sim/sim_object.hh"
/** These classes are just the C++ counterparts for those in Expr.py and
* are, therefore, documented there */
class TimingExprLet;
/** Object to gather the visible context for evaluation */
class TimingExprEvalContext
{
public:
/** Special visible context */
const StaticInstPtr &inst;
ThreadContext *thread;
/** Context visible as sub expressions. results will hold the results
* of (lazily) evaluating let's expressions. resultAvailable elements
* are true when a result has actually been evaluated */
TimingExprLet *let;
std::vector<uint64_t> results;
std::vector<bool > resultAvailable;
TimingExprEvalContext(const StaticInstPtr &inst_,
ThreadContext *thread_, TimingExprLet *let_);
};
class TimingExpr : public SimObject
{
public:
TimingExpr(const TimingExprParams *params) :
SimObject(params)
{ }
virtual uint64_t eval(TimingExprEvalContext &context) = 0;
};
class TimingExprLiteral : public TimingExpr
{
public:
uint64_t value;
TimingExprLiteral(const TimingExprLiteralParams *params) :
TimingExpr(params),
value(params->value)
{ }
uint64_t eval(TimingExprEvalContext &context) { return value; }
};
class TimingExprSrcReg : public TimingExpr
{
public:
unsigned int index;
TimingExprSrcReg(const TimingExprSrcRegParams *params) :
TimingExpr(params),
index(params->index)
{ }
uint64_t eval(TimingExprEvalContext &context);
};
class TimingExprReadIntReg : public TimingExpr
{
public:
TimingExpr *reg;
TimingExprReadIntReg(const TimingExprReadIntRegParams *params) :
TimingExpr(params),
reg(params->reg)
{ }
uint64_t eval(TimingExprEvalContext &context);
};
class TimingExprLet : public TimingExpr
{
public:
std::vector<TimingExpr *> defns;
TimingExpr *expr;
TimingExprLet(const TimingExprLetParams *params) :
TimingExpr(params),
defns(params->defns),
expr(params->expr)
{ }
uint64_t eval(TimingExprEvalContext &context);
};
class TimingExprRef : public TimingExpr
{
public:
unsigned int index;
TimingExprRef(const TimingExprRefParams *params) :
TimingExpr(params),
index(params->index)
{ }
uint64_t eval(TimingExprEvalContext &context);
};
class TimingExprUn : public TimingExpr
{
public:
Enums::TimingExprOp op;
TimingExpr *arg;
TimingExprUn(const TimingExprUnParams *params) :
TimingExpr(params),
op(params->op),
arg(params->arg)
{ }
uint64_t eval(TimingExprEvalContext &context);
};
class TimingExprBin : public TimingExpr
{
public:
Enums::TimingExprOp op;
TimingExpr *left;
TimingExpr *right;
TimingExprBin(const TimingExprBinParams *params) :
TimingExpr(params),
op(params->op),
left(params->left),
right(params->right)
{ }
uint64_t eval(TimingExprEvalContext &context);
};
class TimingExprIf : public TimingExpr
{
public:
TimingExpr *cond;
TimingExpr *trueExpr;
TimingExpr *falseExpr;
TimingExprIf(const TimingExprIfParams *params) :
TimingExpr(params),
cond(params->cond),
trueExpr(params->trueExpr),
falseExpr(params->falseExpr)
{ }
uint64_t eval(TimingExprEvalContext &context);
};
#endif
|
