rom.isa revision 5667:78b94954f66a 
1// Copyright (c) 2008 The Regents of The University of Michigan
2// All rights reserved.
3//
4// Redistribution and use in source and binary forms, with or without
5// modification, are permitted provided that the following conditions are
6// met: redistributions of source code must retain the above copyright
7// notice, this list of conditions and the following disclaimer;
8// redistributions in binary form must reproduce the above copyright
9// notice, this list of conditions and the following disclaimer in the
10// documentation and/or other materials provided with the distribution;
11// neither the name of the copyright holders nor the names of its
12// contributors may be used to endorse or promote products derived from
13// this software without specific prior written permission.
14//
15// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
18// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
19// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
21// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26//
27// Authors: Gabe Black
28
29def template MicroRomConstructor {{
30
31    %(define_generators)s
32    const MicroPC X86ISA::MicrocodeRom::numMicroops = %(num_microops)s;
33
34    X86ISA::MicrocodeRom::MicrocodeRom()
35    {
36        using namespace RomLabels;
37        genFuncs = new GenFunc[numMicroops];
38        %(alloc_generators)s;
39    }
40}};
41
42let {{
43    from micro_asm import Rom
44
45    class X86MicrocodeRom(Rom):
46        def __init__(self, name):
47            super(X86MicrocodeRom, self).__init__(name)
48            self.directives = {}
49
50        def add_microop(self, mnemonic, microop):
51            microop.mnemonic = mnemonic
52            microop.micropc = len(self.microops)
53            self.microops.append(microop)
54
55
56        def getDeclaration(self):
57            declareLabels = "namespace RomLabels {\n"
58            for (label, microop) in self.externs.items():
59                declareLabels += \
60                    "const static MicroPC extern_label_%s = %d;\n" \
61                        % (label, microop.micropc)
62            declareLabels += "}\n"
63            return declareLabels;
64
65        def getDefinition(self):
66            numMicroops = len(self.microops)
67            allocGenerators = ''
68            micropc = 0
69            define_generators = '''
70                namespace
71                {
72                    static const char romMnemonic[] = "Microcode_ROM";
73            '''
74            for op in self.microops:
75                define_generators += op.getGeneratorDef(micropc)
76                allocGenerators += "genFuncs[%d] = %s;\n" % \
77                        (micropc, op.getGenerator(micropc))
78                micropc += 1
79            define_generators += "}\n"
80            iop = InstObjParams(self.name, self.name, "MicrocodeRom",
81                                {"code" : "",
82                                 "define_generators" : define_generators,
83                                 "num_microops" : numMicroops,
84                                 "alloc_generators" : allocGenerators
85                                })
86            return MicroRomConstructor.subst(iop);
87}};
88