str.isa revision 7644 
1// -*- mode:c++ -*-
2
3// Copyright (c) 2010 ARM Limited
4// All rights reserved
5//
6// The license below extends only to copyright in the software and shall
7// not be construed as granting a license to any other intellectual
8// property including but not limited to intellectual property relating
9// to a hardware implementation of the functionality of the software
10// licensed hereunder.  You may use the software subject to the license
11// terms below provided that you ensure that this notice is replicated
12// unmodified and in its entirety in all distributions of the software,
13// modified or unmodified, in source code or in binary form.
14//
15// Redistribution and use in source and binary forms, with or without
16// modification, are permitted provided that the following conditions are
17// met: redistributions of source code must retain the above copyright
18// notice, this list of conditions and the following disclaimer;
19// redistributions in binary form must reproduce the above copyright
20// notice, this list of conditions and the following disclaimer in the
21// documentation and/or other materials provided with the distribution;
22// neither the name of the copyright holders nor the names of its
23// contributors may be used to endorse or promote products derived from
24// this software without specific prior written permission.
25//
26// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
27// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
28// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
29// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
30// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
31// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
32// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
33// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
34// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
35// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
36// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37//
38// Authors: Gabe Black
39
40let {{
41
42    header_output = ""
43    decoder_output = ""
44    exec_output = ""
45
46    class StoreInst(LoadStoreInst):
47        execBase = 'Store'
48
49        def __init__(self, mnem, post, add, writeback, size=4,
50                     sign=False, user=False, flavor="normal"):
51            super(StoreInst, self).__init__()
52
53            self.name = mnem
54            self.post = post
55            self.add = add
56            self.writeback = writeback
57            self.size = size
58            self.sign = sign
59            self.user = user
60            self.flavor = flavor
61
62            if self.add:
63                self.op = " +"
64            else:
65                self.op = " -"
66
67            self.memFlags = ["ArmISA::TLB::MustBeOne"]
68            self.codeBlobs = { "postacc_code" : "" }
69
70        def emitHelper(self, base = 'Memory'):
71
72            global header_output, decoder_output, exec_output
73
74            codeBlobs = self.codeBlobs
75            codeBlobs["predicate_test"] = pickPredicate(codeBlobs)
76            (newHeader,
77             newDecoder,
78             newExec) = self.fillTemplates(self.name, self.Name, codeBlobs,
79                                           self.memFlags, [], base)
80
81            header_output += newHeader
82            decoder_output += newDecoder
83            exec_output += newExec
84
85    class SrsInst(LoadStoreInst):
86        execBase = 'Store'
87        decConstBase = 'Srs'
88
89        def __init__(self, mnem, post, add, writeback):
90            super(SrsInst, self).__init__()
91            self.name = mnem
92            self.post = post
93            self.add = add
94            self.writeback = writeback
95
96            self.Name = "SRS_" + storeImmClassName(post, add, writeback, 8)
97
98        def emit(self):
99            offset = 0
100            if self.post != self.add:
101                offset += 4
102            if not self.add:
103                offset -= 8
104
105            eaCode = "EA = SpMode + %d;" % offset
106
107            wbDiff = -8
108            if self.add:
109                wbDiff = 8
110            accCode = '''
111            CPSR cpsr = Cpsr;
112            Mem.ud = (uint64_t)cSwap(LR.uw, cpsr.e) |
113                     ((uint64_t)cSwap(Spsr.uw, cpsr.e) << 32);
114            '''
115            if self.writeback:
116                accCode += "SpMode = SpMode + %s;\n" % wbDiff
117
118            global header_output, decoder_output, exec_output
119
120            codeBlobs = { "ea_code": eaCode,
121                          "memacc_code": accCode,
122                          "postacc_code": "" }
123            codeBlobs["predicate_test"] = pickPredicate(codeBlobs)
124
125            (newHeader,
126             newDecoder,
127             newExec) = self.fillTemplates(self.name, self.Name, codeBlobs,
128                 ["ArmISA::TLB::AlignWord", "ArmISA::TLB::MustBeOne"], [],
129                 base = 'SrsOp')
130
131            header_output += newHeader
132            decoder_output += newDecoder
133            exec_output += newExec
134
135    class StoreImmInst(StoreInst):
136        def __init__(self, *args, **kargs):
137            super(StoreImmInst, self).__init__(*args, **kargs)
138            self.offset = self.op + " imm"
139
140    class StoreRegInst(StoreInst):
141        def __init__(self, *args, **kargs):
142            super(StoreRegInst, self).__init__(*args, **kargs)
143            self.offset = self.op + " shift_rm_imm(Index, shiftAmt," + \
144                                    " shiftType, CondCodes<29:>)"
145
146    class StoreSingle(StoreInst):
147        def __init__(self, *args, **kargs):
148            super(StoreSingle, self).__init__(*args, **kargs)
149
150            # Build the default class name
151            self.Name = self.nameFunc(self.post, self.add, self.writeback,
152                                      self.size, self.sign, self.user)
153
154            # Add memory request flags where necessary
155            self.memFlags.append("%d" % (self.size - 1))
156            if self.user:
157                self.memFlags.append("ArmISA::TLB::UserMode")
158
159            if self.flavor == "exclusive":
160                self.memFlags.append("Request::LLSC")
161            elif self.flavor != "fp":
162                self.memFlags.append("ArmISA::TLB::AllowUnaligned")
163
164            # Disambiguate the class name for different flavors of stores
165            if self.flavor != "normal":
166                self.Name = "%s_%s" % (self.name.upper(), self.Name)
167
168        def emit(self):
169            # Address computation
170            eaCode = "EA = Base"
171            if not self.post:
172                eaCode += self.offset
173            eaCode += ";"
174
175            if self.flavor == "fp":
176                eaCode += vfpEnabledCheckCode
177
178            self.codeBlobs["ea_code"] = eaCode
179
180            # Code that actually handles the access
181            if self.flavor == "fp":
182                accCode = 'Mem%(suffix)s = cSwap(FpDest.uw, ((CPSR)Cpsr).e);'
183            else:
184                accCode = \
185                    'Mem%(suffix)s = cSwap(Dest%(suffix)s, ((CPSR)Cpsr).e);'
186            accCode = accCode % \
187                { "suffix" : buildMemSuffix(self.sign, self.size) }
188
189            if self.writeback:
190                accCode += "Base = Base %s;\n" % self.offset
191
192            self.codeBlobs["memacc_code"] = accCode
193
194            # Push it out to the output files
195            base = buildMemBase(self.basePrefix, self.post, self.writeback)
196            self.emitHelper(base)
197
198    def storeImmClassName(post, add, writeback, size=4, sign=False, user=False):
199        return memClassName("STORE_IMM", post, add, writeback, size, sign, user)
200
201    class StoreImmEx(StoreImmInst, StoreSingle):
202        execBase = 'StoreEx'
203        decConstBase = 'StoreExImm'
204        basePrefix = 'MemoryExImm'
205        nameFunc = staticmethod(storeImmClassName)
206
207        def __init__(self, *args, **kargs):
208            super(StoreImmEx, self).__init__(*args, **kargs)
209            self.codeBlobs["postacc_code"] = "Result = !writeResult;"
210
211    class StoreImm(StoreImmInst, StoreSingle):
212        decConstBase = 'LoadStoreImm'
213        basePrefix = 'MemoryImm'
214        nameFunc = staticmethod(storeImmClassName)
215
216    def storeRegClassName(post, add, writeback, size=4, sign=False, user=False):
217        return memClassName("STORE_REG", post, add, writeback, size, sign, user)
218
219    class StoreReg(StoreRegInst, StoreSingle):
220        decConstBase = 'LoadStoreReg'
221        basePrefix = 'MemoryReg'
222        nameFunc = staticmethod(storeRegClassName)
223
224    class StoreDouble(StoreInst):
225        def __init__(self, *args, **kargs):
226            super(StoreDouble, self).__init__(*args, **kargs)
227
228            # Build the default class name
229            self.Name = self.nameFunc(self.post, self.add, self.writeback)
230
231            # Add memory request flags where necessary
232            if self.flavor == "exclusive":
233                self.memFlags.append("Request::LLSC")
234                self.memFlags.append("ArmISA::TLB::AlignDoubleWord")
235            else:
236                self.memFlags.append("ArmISA::TLB::AlignWord")
237
238            # Disambiguate the class name for different flavors of stores
239            if self.flavor != "normal":
240                self.Name = "%s_%s" % (self.name.upper(), self.Name)
241
242        def emit(self):
243            # Address computation code
244            eaCode = "EA = Base"
245            if not self.post:
246                eaCode += self.offset
247            eaCode += ";"
248
249            if self.flavor == "fp":
250                eaCode += vfpEnabledCheckCode
251
252            self.codeBlobs["ea_code"] = eaCode
253
254            # Code that actually handles the access
255            if self.flavor == "fp":
256                accCode = '''
257                uint64_t swappedMem  = (uint64_t)FpDest.uw |
258                                       ((uint64_t)FpDest2.uw << 32);
259                Mem.ud = cSwap(swappedMem, ((CPSR)Cpsr).e);
260                '''
261            else:
262                accCode = '''
263                CPSR cpsr = Cpsr;
264                Mem.ud = (uint64_t)cSwap(Dest.uw, cpsr.e) |
265                         ((uint64_t)cSwap(Dest2.uw, cpsr.e) << 32);
266                '''
267
268            if self.writeback:
269                accCode += "Base = Base %s;\n" % self.offset
270
271            self.codeBlobs["memacc_code"] = accCode
272
273            # Push it out to the output files
274            base = buildMemBase(self.basePrefix, self.post, self.writeback)
275            self.emitHelper(base)
276
277    def storeDoubleImmClassName(post, add, writeback):
278        return memClassName("STORE_IMMD", post, add, writeback, 4, False, False)
279
280    class StoreDoubleImmEx(StoreImmInst, StoreDouble):
281        execBase = 'StoreEx'
282        decConstBase = 'StoreExDImm'
283        basePrefix = 'MemoryExDImm'
284        nameFunc = staticmethod(storeDoubleImmClassName)
285
286        def __init__(self, *args, **kargs):
287            super(StoreDoubleImmEx, self).__init__(*args, **kargs)
288            self.codeBlobs["postacc_code"] = "Result = !writeResult;"
289
290    class StoreDoubleImm(StoreImmInst, StoreDouble):
291        decConstBase = 'LoadStoreDImm'
292        basePrefix = 'MemoryDImm'
293        nameFunc = staticmethod(storeDoubleImmClassName)
294
295    def storeDoubleRegClassName(post, add, writeback):
296        return memClassName("STORE_REGD", post, add, writeback, 4, False, False)
297
298    class StoreDoubleReg(StoreRegInst, StoreDouble):
299        decConstBase = 'LoadStoreDReg'
300        basePrefix = 'MemoryDReg'
301        nameFunc = staticmethod(storeDoubleRegClassName)
302
303    def buildStores(mnem, size=4, sign=False, user=False):
304        StoreImm(mnem, True, True, True, size, sign, user).emit()
305        StoreReg(mnem, True, True, True, size, sign, user).emit()
306        StoreImm(mnem, True, False, True, size, sign, user).emit()
307        StoreReg(mnem, True, False, True, size, sign, user).emit()
308        StoreImm(mnem, False, True, True, size, sign, user).emit()
309        StoreReg(mnem, False, True, True, size, sign, user).emit()
310        StoreImm(mnem, False, False, True, size, sign, user).emit()
311        StoreReg(mnem, False, False, True, size, sign, user).emit()
312        StoreImm(mnem, False, True, False, size, sign, user).emit()
313        StoreReg(mnem, False, True, False, size, sign, user).emit()
314        StoreImm(mnem, False, False, False, size, sign, user).emit()
315        StoreReg(mnem, False, False, False, size, sign, user).emit()
316
317    def buildDoubleStores(mnem):
318        StoreDoubleImm(mnem, True, True, True).emit()
319        StoreDoubleReg(mnem, True, True, True).emit()
320        StoreDoubleImm(mnem, True, False, True).emit()
321        StoreDoubleReg(mnem, True, False, True).emit()
322        StoreDoubleImm(mnem, False, True, True).emit()
323        StoreDoubleReg(mnem, False, True, True).emit()
324        StoreDoubleImm(mnem, False, False, True).emit()
325        StoreDoubleReg(mnem, False, False, True).emit()
326        StoreDoubleImm(mnem, False, True, False).emit()
327        StoreDoubleReg(mnem, False, True, False).emit()
328        StoreDoubleImm(mnem, False, False, False).emit()
329        StoreDoubleReg(mnem, False, False, False).emit()
330
331    def buildSrsStores(mnem):
332        SrsInst(mnem, True, True, True).emit()
333        SrsInst(mnem, True, True, False).emit()
334        SrsInst(mnem, True, False, True).emit()
335        SrsInst(mnem, True, False, False).emit()
336        SrsInst(mnem, False, True, True).emit()
337        SrsInst(mnem, False, True, False).emit()
338        SrsInst(mnem, False, False, True).emit()
339        SrsInst(mnem, False, False, False).emit()
340
341    buildStores("str")
342    buildStores("strt", user=True)
343    buildStores("strb", size=1)
344    buildStores("strbt", size=1, user=True)
345    buildStores("strh", size=2)
346    buildStores("strht", size=2, user=True)
347
348    buildSrsStores("srs")
349
350    buildDoubleStores("strd")
351
352    StoreImmEx("strex", False, True, False, size=4, flavor="exclusive").emit()
353    StoreImmEx("strexh", False, True, False, size=2, flavor="exclusive").emit()
354    StoreImmEx("strexb", False, True, False, size=1, flavor="exclusive").emit()
355    StoreDoubleImmEx("strexd", False, True, False, flavor="exclusive").emit()
356
357    StoreImm("vstr", False, True, False, size=4, flavor="fp").emit()
358    StoreImm("vstr", False, False, False, size=4, flavor="fp").emit()
359    StoreDoubleImm("vstr", False, True, False, flavor="fp").emit()
360    StoreDoubleImm("vstr", False, False, False, flavor="fp").emit()
361}};
362