3 // Copyright (c) 2007 The Hewlett-Packard Development Company
4 // All rights reserved.
6 // Redistribution and use of this software in source and binary forms,
7 // with or without modification, are permitted provided that the
8 // following conditions are met:
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14 // teaching, education and corporate research & development.
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34 // this software without specific prior written permission. No right of
35 // sublicense is granted herewith. Derivatives of the software and
36 // output created using the software may be prepared, but only for
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39 // conditions herein which includes the Non-Commercial Use restrictions;
40 // and (ii) such Derivatives of the software include the above copyright
41 // notice to acknowledge the contribution from this software where
42 // applicable, this list of conditions and the disclaimer below.
44 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
45 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
46 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
47 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
48 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
49 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
50 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
51 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
52 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
53 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
54 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
56 // Authors: Gabe Black
58 //////////////////////////////////////////////////////////////////////////////
60 // Architecture independent
63 // Execute method for macroops.
64 def template MacroExecPanic {{
65 Fault execute(%(CPU_exec_context)s *, Trace::InstRecord *) const
67 panic("Tried to execute macroop directly!");
74 // Base class for combinationally generated macroops
75 class Macroop : public StaticInst
78 const uint32_t numMicroops;
81 Macroop(const char *mnem, ExtMachInst _machInst,
82 uint32_t _numMicroops)
83 : StaticInst(mnem, _machInst, No_OpClass),
84 numMicroops(_numMicroops)
87 microops = new StaticInstPtr[numMicroops];
88 flags[IsMacroop] = true;
96 StaticInstPtr * microops;
98 StaticInstPtr fetchMicroop(MicroPC microPC)
100 assert(microPC < numMicroops);
101 return microops[microPC];
104 std::string generateDisassembly(Addr pc,
105 const SymbolTable *symtab) const
114 //////////////////////////////////////////////////////////////////////////////
118 //////////////////////////////////////////////////////////////////////////////
120 // Basic instruction class declaration template.
121 def template MacroDeclare {{
125 * Static instruction class for "%(mnemonic)s".
127 class %(class_name)s : public %(base_class)s
131 %(class_name)s(ExtMachInst machInst, X86ISA::EmulEnv env);
136 // Basic instruction class constructor template.
137 def template MacroConstructor {{
138 inline X86Macroop::%(class_name)s::%(class_name)s(
139 ExtMachInst machInst, EmulEnv env)
140 : %(base_class)s("%(mnemonic)s", machInst, %(num_microops)s)
145 //alloc_microops is the code that sets up the microops
146 //array in the parent class.
152 from micro_asm import Combinational_Macroop, Rom_Macroop
153 class X86Macroop(Combinational_Macroop):
154 def setAdjustEnv(self, val):
155 self.adjust_env = val
156 def __init__(self, name):
157 super(X86Macroop, self).__init__(name)
159 "adjust_env" : self.setAdjustEnv
161 self.declared = False
164 def getAllocator(self, env):
165 return "new X86Macroop::%s(machInst, %s)" % (self.name, env.getAllocator())
166 def getDeclaration(self):
167 #FIXME This first parameter should be the mnemonic. I need to
168 #write some code which pulls that out
169 iop = InstObjParams(self.name, self.name, "Macroop", {"code" : ""})
170 return MacroDeclare.subst(iop);
171 def getDefinition(self):
172 #FIXME This first parameter should be the mnemonic. I need to
173 #write some code which pulls that out
174 numMicroops = len(self.microops)
177 for op in self.microops:
179 "microops[%d] = %s;\n" % \
180 (micropc, op.getAllocator(True, False,
182 micropc == numMicroops - 1))
184 iop = InstObjParams(self.name, self.name, "Macroop",
185 {"code" : "", "num_microops" : numMicroops,
186 "alloc_microops" : allocMicroops,
187 "adjust_env" : self.adjust_env,
188 "do_modrm" : self.doModRM})
189 return MacroConstructor.subst(iop);
193 class EmulEnv(object):
198 self.regmUsed = False
199 self.addressSize = "ADDRSIZE"
200 self.dataSize = "OPSIZE"
201 self.stackSize = "STACKSIZE"
204 def getAllocator(self):
205 return '''EmulEnv(%(reg)s,
209 %(stackSize)s)''' % \
211 def addReg(self, reg):
215 elif not self.regmUsed:
219 raise Exception, "EmulEnv is out of register specialization spots."
223 doModRMString = "env.doModRM(machInst);\n"
224 def genMacroop(Name, env):
225 blocks = OutputBlocks()
226 if not macroopDict.has_key(Name):
227 raise Exception, "Unrecognized instruction: %s" % Name
228 macroop = macroopDict[Name]
229 if not macroop.declared:
231 macroop.doModRM = doModRMString
232 blocks.header_output = macroop.getDeclaration()
233 blocks.decoder_output = macroop.getDefinition()
234 macroop.declared = True
235 blocks.decode_block = "return %s;\n" % macroop.getAllocator(env)