ldr64.isa revision 10037
1// -*- mode:c++ -*- 2 3// Copyright (c) 2011-2013 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 LoadInst64(LoadStoreInst): 47 execBase = 'Load64' 48 micro = False 49 50 def __init__(self, mnem, Name, size=4, sign=False, user=False, 51 literal=False, flavor="normal", top=False): 52 super(LoadInst64, self).__init__() 53 54 self.name = mnem 55 self.Name = Name 56 self.size = size 57 self.sign = sign 58 self.user = user 59 self.literal = literal 60 self.flavor = flavor 61 self.top = top 62 63 self.memFlags = ["ArmISA::TLB::MustBeOne"] 64 self.instFlags = [] 65 self.codeBlobs = {"postacc_code" : ""} 66 67 # Add memory request flags where necessary 68 if self.user: 69 self.memFlags.append("ArmISA::TLB::UserMode") 70 71 if self.flavor == "dprefetch": 72 self.memFlags.append("Request::PREFETCH") 73 self.instFlags = ['IsDataPrefetch'] 74 elif self.flavor == "iprefetch": 75 self.memFlags.append("Request::PREFETCH") 76 self.instFlags = ['IsInstPrefetch'] 77 if self.micro: 78 self.instFlags.append("IsMicroop") 79 80 if self.flavor in ("acexp", "exp"): 81 # For exclusive pair ops alignment check is based on total size 82 self.memFlags.append("%d" % int(math.log(self.size, 2) + 1)) 83 elif not (self.size == 16 and self.top): 84 # Only the first microop should perform alignment checking. 85 self.memFlags.append("%d" % int(math.log(self.size, 2))) 86 87 if self.flavor not in ("acquire", "acex", "exclusive", 88 "acexp", "exp"): 89 self.memFlags.append("ArmISA::TLB::AllowUnaligned") 90 91 if self.flavor in ("acquire", "acex", "acexp"): 92 self.instFlags.extend(["IsMemBarrier", 93 "IsWriteBarrier", 94 "IsReadBarrier"]) 95 if self.flavor in ("acex", "exclusive", "exp", "acexp"): 96 self.memFlags.append("Request::LLSC") 97 98 def buildEACode(self): 99 # Address computation code 100 eaCode = "" 101 if self.flavor == "fp": 102 eaCode += vfp64EnabledCheckCode 103 104 if self.literal: 105 eaCode += "EA = RawPC" 106 else: 107 eaCode += SPAlignmentCheckCode + "EA = XBase" 108 109 if self.size == 16: 110 if self.top: 111 eaCode += " + (isBigEndian64(xc->tcBase()) ? 0 : 8)" 112 else: 113 eaCode += " + (isBigEndian64(xc->tcBase()) ? 8 : 0)" 114 if not self.post: 115 eaCode += self.offset 116 eaCode += ";" 117 118 self.codeBlobs["ea_code"] = eaCode 119 120 def emitHelper(self, base='Memory64', wbDecl=None): 121 global header_output, decoder_output, exec_output 122 123 # If this is a microop itself, don't allow anything that would 124 # require further microcoding. 125 if self.micro: 126 assert not wbDecl 127 128 fa_code = None 129 if not self.micro and self.flavor in ("normal", "widen", "acquire"): 130 fa_code = ''' 131 fault->annotate(ArmFault::SAS, %s); 132 fault->annotate(ArmFault::SSE, %s); 133 fault->annotate(ArmFault::SRT, dest); 134 fault->annotate(ArmFault::SF, %s); 135 fault->annotate(ArmFault::AR, %s); 136 ''' % ("0" if self.size == 1 else 137 "1" if self.size == 2 else 138 "2" if self.size == 4 else "3", 139 "true" if self.sign else "false", 140 "true" if (self.size == 8 or 141 self.flavor == "widen") else "false", 142 "true" if self.flavor == "acquire" else "false") 143 144 (newHeader, newDecoder, newExec) = \ 145 self.fillTemplates(self.name, self.Name, self.codeBlobs, 146 self.memFlags, self.instFlags, 147 base, wbDecl, faCode=fa_code) 148 149 header_output += newHeader 150 decoder_output += newDecoder 151 exec_output += newExec 152 153 class LoadImmInst64(LoadInst64): 154 def __init__(self, *args, **kargs): 155 super(LoadImmInst64, self).__init__(*args, **kargs) 156 self.offset = " + imm" 157 158 self.wbDecl = "MicroAddXiUop(machInst, base, base, imm);" 159 160 class LoadRegInst64(LoadInst64): 161 def __init__(self, *args, **kargs): 162 super(LoadRegInst64, self).__init__(*args, **kargs) 163 self.offset = " + extendReg64(XOffset, type, shiftAmt, 64)" 164 165 self.wbDecl = \ 166 "MicroAddXERegUop(machInst, base, base, " + \ 167 " offset, type, shiftAmt);" 168 169 class LoadRawRegInst64(LoadInst64): 170 def __init__(self, *args, **kargs): 171 super(LoadRawRegInst64, self).__init__(*args, **kargs) 172 self.offset = "" 173 174 class LoadSingle64(LoadInst64): 175 def emit(self): 176 self.buildEACode() 177 178 # Code that actually handles the access 179 if self.flavor in ("dprefetch", "iprefetch"): 180 accCode = 'uint64_t temp M5_VAR_USED = Mem%s;' 181 elif self.flavor == "fp": 182 if self.size in (1, 2, 4): 183 accCode = ''' 184 AA64FpDestP0_uw = cSwap(Mem%s, 185 isBigEndian64(xc->tcBase())); 186 AA64FpDestP1_uw = 0; 187 AA64FpDestP2_uw = 0; 188 AA64FpDestP3_uw = 0; 189 ''' 190 elif self.size == 8 or (self.size == 16 and not self.top): 191 accCode = ''' 192 uint64_t data = cSwap(Mem%s, 193 isBigEndian64(xc->tcBase())); 194 AA64FpDestP0_uw = (uint32_t)data; 195 AA64FpDestP1_uw = (data >> 32); 196 ''' 197 # Only zero out the other half if this isn't part of a 198 # pair of 8 byte loads implementing a 16 byte load. 199 if self.size == 8: 200 accCode += ''' 201 AA64FpDestP2_uw = 0; 202 AA64FpDestP3_uw = 0; 203 ''' 204 elif self.size == 16 and self.top: 205 accCode = ''' 206 uint64_t data = cSwap(Mem%s, 207 isBigEndian64(xc->tcBase())); 208 AA64FpDestP2_uw = (uint32_t)data; 209 AA64FpDestP3_uw = (data >> 32); 210 ''' 211 elif self.flavor == "widen" or self.size == 8: 212 accCode = "XDest = cSwap(Mem%s, isBigEndian64(xc->tcBase()));" 213 else: 214 accCode = "WDest = cSwap(Mem%s, isBigEndian64(xc->tcBase()));" 215 if self.size == 16: 216 accCode = accCode % buildMemSuffix(self.sign, 8) 217 else: 218 accCode = accCode % buildMemSuffix(self.sign, self.size) 219 220 self.codeBlobs["memacc_code"] = accCode 221 222 # Push it out to the output files 223 wbDecl = None 224 if self.writeback and not self.micro: 225 wbDecl = self.wbDecl 226 self.emitHelper(self.base, wbDecl) 227 228 class LoadDouble64(LoadInst64): 229 def emit(self): 230 self.buildEACode() 231 232 # Code that actually handles the access 233 if self.flavor == "fp": 234 accCode = ''' 235 uint64_t data = cSwap(Mem_ud, isBigEndian64(xc->tcBase())); 236 AA64FpDestP0_uw = (uint32_t)data; 237 AA64FpDestP1_uw = 0; 238 AA64FpDestP2_uw = 0; 239 AA64FpDestP3_uw = 0; 240 AA64FpDest2P0_uw = (data >> 32); 241 AA64FpDest2P1_uw = 0; 242 AA64FpDest2P2_uw = 0; 243 AA64FpDest2P3_uw = 0; 244 ''' 245 else: 246 if self.sign: 247 if self.size == 4: 248 accCode = ''' 249 uint64_t data = cSwap(Mem_ud, 250 isBigEndian64(xc->tcBase())); 251 XDest = sext<32>((uint32_t)data); 252 XDest2 = sext<32>(data >> 32); 253 ''' 254 elif self.size == 8: 255 accCode = ''' 256 XDest = sext<64>(Mem_tud.a); 257 XDest2 = sext<64>(Mem_tud.b); 258 ''' 259 else: 260 if self.size == 4: 261 accCode = ''' 262 uint64_t data = cSwap(Mem_ud, 263 isBigEndian64(xc->tcBase())); 264 XDest = (uint32_t)data; 265 XDest2 = data >> 32; 266 ''' 267 elif self.size == 8: 268 accCode = ''' 269 XDest = Mem_tud.a; 270 XDest2 = Mem_tud.b; 271 ''' 272 self.codeBlobs["memacc_code"] = accCode 273 274 # Push it out to the output files 275 wbDecl = None 276 if self.writeback and not self.micro: 277 wbDecl = self.wbDecl 278 self.emitHelper(self.base, wbDecl) 279 280 class LoadImm64(LoadImmInst64, LoadSingle64): 281 decConstBase = 'LoadStoreImm64' 282 base = 'ArmISA::MemoryImm64' 283 writeback = False 284 post = False 285 286 class LoadPre64(LoadImmInst64, LoadSingle64): 287 decConstBase = 'LoadStoreImm64' 288 base = 'ArmISA::MemoryPreIndex64' 289 writeback = True 290 post = False 291 292 class LoadPost64(LoadImmInst64, LoadSingle64): 293 decConstBase = 'LoadStoreImm64' 294 base = 'ArmISA::MemoryPostIndex64' 295 writeback = True 296 post = True 297 298 class LoadReg64(LoadRegInst64, LoadSingle64): 299 decConstBase = 'LoadStoreReg64' 300 base = 'ArmISA::MemoryReg64' 301 writeback = False 302 post = False 303 304 class LoadRaw64(LoadRawRegInst64, LoadSingle64): 305 decConstBase = 'LoadStoreRaw64' 306 base = 'ArmISA::MemoryRaw64' 307 writeback = False 308 post = False 309 310 class LoadEx64(LoadRawRegInst64, LoadSingle64): 311 decConstBase = 'LoadStoreEx64' 312 base = 'ArmISA::MemoryEx64' 313 writeback = False 314 post = False 315 316 class LoadLit64(LoadImmInst64, LoadSingle64): 317 decConstBase = 'LoadStoreLit64' 318 base = 'ArmISA::MemoryLiteral64' 319 writeback = False 320 post = False 321 322 def buildLoads64(mnem, NameBase, size, sign, flavor="normal"): 323 LoadImm64(mnem, NameBase + "_IMM", size, sign, flavor=flavor).emit() 324 LoadPre64(mnem, NameBase + "_PRE", size, sign, flavor=flavor).emit() 325 LoadPost64(mnem, NameBase + "_POST", size, sign, flavor=flavor).emit() 326 LoadReg64(mnem, NameBase + "_REG", size, sign, flavor=flavor).emit() 327 328 buildLoads64("ldrb", "LDRB64", 1, False) 329 buildLoads64("ldrsb", "LDRSBW64", 1, True) 330 buildLoads64("ldrsb", "LDRSBX64", 1, True, flavor="widen") 331 buildLoads64("ldrh", "LDRH64", 2, False) 332 buildLoads64("ldrsh", "LDRSHW64", 2, True) 333 buildLoads64("ldrsh", "LDRSHX64", 2, True, flavor="widen") 334 buildLoads64("ldrsw", "LDRSW64", 4, True, flavor="widen") 335 buildLoads64("ldr", "LDRW64", 4, False) 336 buildLoads64("ldr", "LDRX64", 8, False) 337 buildLoads64("ldr", "LDRBFP64", 1, False, flavor="fp") 338 buildLoads64("ldr", "LDRHFP64", 2, False, flavor="fp") 339 buildLoads64("ldr", "LDRSFP64", 4, False, flavor="fp") 340 buildLoads64("ldr", "LDRDFP64", 8, False, flavor="fp") 341 342 LoadImm64("prfm", "PRFM64_IMM", 8, flavor="dprefetch").emit() 343 LoadReg64("prfm", "PRFM64_REG", 8, flavor="dprefetch").emit() 344 LoadLit64("prfm", "PRFM64_LIT", 8, literal=True, flavor="dprefetch").emit() 345 LoadImm64("prfum", "PRFUM64_IMM", 8, flavor="dprefetch").emit() 346 347 LoadImm64("ldurb", "LDURB64_IMM", 1, False).emit() 348 LoadImm64("ldursb", "LDURSBW64_IMM", 1, True).emit() 349 LoadImm64("ldursb", "LDURSBX64_IMM", 1, True, flavor="widen").emit() 350 LoadImm64("ldurh", "LDURH64_IMM", 2, False).emit() 351 LoadImm64("ldursh", "LDURSHW64_IMM", 2, True).emit() 352 LoadImm64("ldursh", "LDURSHX64_IMM", 2, True, flavor="widen").emit() 353 LoadImm64("ldursw", "LDURSW64_IMM", 4, True, flavor="widen").emit() 354 LoadImm64("ldur", "LDURW64_IMM", 4, False).emit() 355 LoadImm64("ldur", "LDURX64_IMM", 8, False).emit() 356 LoadImm64("ldur", "LDURBFP64_IMM", 1, flavor="fp").emit() 357 LoadImm64("ldur", "LDURHFP64_IMM", 2, flavor="fp").emit() 358 LoadImm64("ldur", "LDURSFP64_IMM", 4, flavor="fp").emit() 359 LoadImm64("ldur", "LDURDFP64_IMM", 8, flavor="fp").emit() 360 361 LoadImm64("ldtrb", "LDTRB64_IMM", 1, False, True).emit() 362 LoadImm64("ldtrsb", "LDTRSBW64_IMM", 1, True, True).emit() 363 LoadImm64("ldtrsb", "LDTRSBX64_IMM", 1, True, True, flavor="widen").emit() 364 LoadImm64("ldtrh", "LDTRH64_IMM", 2, False, True).emit() 365 LoadImm64("ldtrsh", "LDTRSHW64_IMM", 2, True, True).emit() 366 LoadImm64("ldtrsh", "LDTRSHX64_IMM", 2, True, True, flavor="widen").emit() 367 LoadImm64("ldtrsw", "LDTRSW64_IMM", 4, True, flavor="widen").emit() 368 LoadImm64("ldtr", "LDTRW64_IMM", 4, False, True).emit() 369 LoadImm64("ldtr", "LDTRX64_IMM", 8, False, True).emit() 370 371 LoadLit64("ldrsw", "LDRSWL64_LIT", 4, True, \ 372 literal=True, flavor="widen").emit() 373 LoadLit64("ldr", "LDRWL64_LIT", 4, False, literal=True).emit() 374 LoadLit64("ldr", "LDRXL64_LIT", 8, False, literal=True).emit() 375 LoadLit64("ldr", "LDRSFP64_LIT", 4, literal=True, flavor="fp").emit() 376 LoadLit64("ldr", "LDRDFP64_LIT", 8, literal=True, flavor="fp").emit() 377 378 LoadRaw64("ldar", "LDARX64", 8, flavor="acquire").emit() 379 LoadRaw64("ldar", "LDARW64", 4, flavor="acquire").emit() 380 LoadRaw64("ldarh", "LDARH64", 2, flavor="acquire").emit() 381 LoadRaw64("ldarb", "LDARB64", 1, flavor="acquire").emit() 382 383 LoadEx64("ldaxr", "LDAXRX64", 8, flavor="acex").emit() 384 LoadEx64("ldaxr", "LDAXRW64", 4, flavor="acex").emit() 385 LoadEx64("ldaxrh", "LDAXRH64", 2, flavor="acex").emit() 386 LoadEx64("ldaxrb", "LDAXRB64", 1, flavor="acex").emit() 387 388 LoadEx64("ldxr", "LDXRX64", 8, flavor="exclusive").emit() 389 LoadEx64("ldxr", "LDXRW64", 4, flavor="exclusive").emit() 390 LoadEx64("ldxrh", "LDXRH64", 2, flavor="exclusive").emit() 391 LoadEx64("ldxrb", "LDXRB64", 1, flavor="exclusive").emit() 392 393 class LoadImmU64(LoadImm64): 394 decConstBase = 'LoadStoreImmU64' 395 micro = True 396 397 class LoadImmDU64(LoadImmInst64, LoadDouble64): 398 decConstBase = 'LoadStoreImmDU64' 399 base = 'ArmISA::MemoryDImm64' 400 micro = True 401 post = False 402 writeback = False 403 404 class LoadImmDouble64(LoadImmInst64, LoadDouble64): 405 decConstBase = 'LoadStoreImmDU64' 406 base = 'ArmISA::MemoryDImm64' 407 micro = False 408 post = False 409 writeback = False 410 411 class LoadRegU64(LoadReg64): 412 decConstBase = 'LoadStoreRegU64' 413 micro = True 414 415 class LoadLitU64(LoadLit64): 416 decConstBase = 'LoadStoreLitU64' 417 micro = True 418 419 LoadImmDouble64("ldaxp", "LDAXPW64", 4, flavor="acexp").emit() 420 LoadImmDouble64("ldaxp", "LDAXPX64", 8, flavor="acexp").emit() 421 LoadImmDouble64("ldxp", "LDXPW64", 4, flavor="exp").emit() 422 LoadImmDouble64("ldxp", "LDXPX64", 8, flavor="exp").emit() 423 424 LoadImmU64("ldrxi_uop", "MicroLdrXImmUop", 8).emit() 425 LoadRegU64("ldrxr_uop", "MicroLdrXRegUop", 8).emit() 426 LoadLitU64("ldrxl_uop", "MicroLdrXLitUop", 8, literal=True).emit() 427 LoadImmU64("ldrfpxi_uop", "MicroLdrFpXImmUop", 8, flavor="fp").emit() 428 LoadRegU64("ldrfpxr_uop", "MicroLdrFpXRegUop", 8, flavor="fp").emit() 429 LoadLitU64("ldrfpxl_uop", "MicroLdrFpXLitUop", 8, literal=True, 430 flavor="fp").emit() 431 LoadImmU64("ldrqbfpxi_uop", "MicroLdrQBFpXImmUop", 432 16, flavor="fp", top = False).emit() 433 LoadRegU64("ldrqbfpxr_uop", "MicroLdrQBFpXRegUop", 434 16, flavor="fp", top = False).emit() 435 LoadLitU64("ldrqbfpxl_uop", "MicroLdrQBFpXLitUop", 436 16, literal=True, flavor="fp", top = False).emit() 437 LoadImmU64("ldrqtfpxi_uop", "MicroLdrQTFpXImmUop", 438 16, flavor="fp", top = True).emit() 439 LoadRegU64("ldrqtfpxr_uop", "MicroLdrQTFpXRegUop", 440 16, flavor="fp", top = True).emit() 441 LoadLitU64("ldrqtfpxl_uop", "MicroLdrQTFpXLitUop", 442 16, literal=True, flavor="fp", top = True).emit() 443 LoadImmDU64("ldrduxi_uop", "MicroLdrDUXImmUop", 4, sign=False).emit() 444 LoadImmDU64("ldrdsxi_uop", "MicroLdrDSXImmUop", 4, sign=True).emit() 445 LoadImmDU64("ldrdfpxi_uop", "MicroLdrDFpXImmUop", 4, flavor="fp").emit() 446}}; 447