1 # Copyright (c) 2013-2014 ARM Limited
4 # The license below extends only to copyright in the software and shall
5 # not be construed as granting a license to any other intellectual
6 # property including but not limited to intellectual property relating
7 # to a hardware implementation of the functionality of the software
8 # licensed hereunder. You may use the software subject to the license
9 # terms below provided that you ensure that this notice is replicated
10 # unmodified and in its entirety in all distributions of the software,
11 # modified or unmodified, in source code or in binary form.
13 # Redistribution and use in source and binary forms, with or without
14 # modification, are permitted provided that the following conditions are
15 # met: redistributions of source code must retain the above copyright
16 # notice, this list of conditions and the following disclaimer;
17 # redistributions in binary form must reproduce the above copyright
18 # notice, this list of conditions and the following disclaimer in the
19 # documentation and/or other materials provided with the distribution;
20 # neither the name of the copyright holders nor the names of its
21 # contributors may be used to endorse or promote products derived from
22 # this software without specific prior written permission.
24 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
25 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
26 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
27 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
28 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
29 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
30 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
31 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
32 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
34 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 # Authors: Andrew Bardsley
38 from m5
.params
import *
39 from m5
.SimObject
import SimObject
41 # These classes define an expression language over uint64_t with only
42 # a few operators. This can be used to form expressions for the extra
43 # delay required in variable execution time instructions.
45 # Expressions, in evaluation, will have access to the ThreadContext and
48 class TimingExpr(SimObject
):
50 cxx_header
= 'cpu/timing_expr.hh'
53 class TimingExprLiteral(TimingExpr
):
54 """Literal 64 bit unsigned value"""
55 type = 'TimingExprLiteral'
56 cxx_header
= 'cpu/timing_expr.hh'
58 value
= Param
.UInt64("literal value")
60 def set_params(self
, value
):
64 class TimingExpr0(TimingExprLiteral
):
68 class TimingExprSrcReg(TimingExpr
):
69 """Find the source register number from the current inst"""
70 type = 'TimingExprSrcReg'
71 cxx_header
= 'cpu/timing_expr.hh'
73 # index = Param.Unsigned("index into inst src regs")
74 index
= Param
.Unsigned("index into inst src regs")
76 def set_params(self
, index
):
80 class TimingExprReadIntReg(TimingExpr
):
81 """Read an architectural register"""
82 type = 'TimingExprReadIntReg'
83 cxx_header
= 'cpu/timing_expr.hh'
85 reg
= Param
.TimingExpr("register raw index to read")
87 def set_params(self
, reg
):
91 class TimingExprLet(TimingExpr
):
92 """Block of declarations"""
93 type = 'TimingExprLet'
94 cxx_header
= 'cpu/timing_expr.hh'
96 defns
= VectorParam
.TimingExpr("expressions for bindings")
97 expr
= Param
.TimingExpr("body expression")
99 def set_params(self
, defns
, expr
):
104 class TimingExprRef(TimingExpr
):
105 """Value of a bound sub-expression"""
106 type = 'TimingExprRef'
107 cxx_header
= 'cpu/timing_expr.hh'
109 index
= Param
.Unsigned("expression index")
111 def set_params(self
, index
):
115 class TimingExprOp(Enum
):
117 'timingExprAdd', 'timingExprSub',
118 'timingExprUMul', 'timingExprUDiv',
119 'timingExprSMul', 'timingExprSDiv',
120 'timingExprUCeilDiv', # Unsigned divide rounding up
121 'timingExprEqual', 'timingExprNotEqual',
122 'timingExprULessThan',
123 'timingExprUGreaterThan',
124 'timingExprSLessThan',
125 'timingExprSGreaterThan',
130 'timingExprSizeInBits',
131 'timingExprSignExtend32To64',
135 class TimingExprUn(TimingExpr
):
137 type = 'TimingExprUn'
138 cxx_header
= 'cpu/timing_expr.hh'
140 op
= Param
.TimingExprOp("operator")
141 arg
= Param
.TimingExpr("expression")
143 def set_params(self
, op
, arg
):
148 class TimingExprBin(TimingExpr
):
149 """Binary operator"""
150 type = 'TimingExprBin'
151 cxx_header
= 'cpu/timing_expr.hh'
153 op
= Param
.TimingExprOp("operator")
154 left
= Param
.TimingExpr("LHS expression")
155 right
= Param
.TimingExpr("RHS expression")
157 def set_params(self
, op
, left
, right
):
163 class TimingExprIf(TimingExpr
):
164 """If-then-else operator"""
165 type = 'TimingExprIf'
166 cxx_header
= 'cpu/timing_expr.hh'
168 cond
= Param
.TimingExpr("condition expression")
169 trueExpr
= Param
.TimingExpr("true expression")
170 falseExpr
= Param
.TimingExpr("false expression")
172 def set_params(self
, cond
, trueExpr
, falseExpr
):
174 self
.trueExpr
= trueExpr
175 self
.falseExpr
= falseExpr