src/edu/berkeley/fleet/two/FleetTwoFleet.java

   1 package edu.berkeley.fleet.two;
   2 import java.io.*;
   3 import edu.berkeley.fleet.api.*;
   4 import edu.berkeley.fleet.util.*;
   5 import edu.berkeley.fleet.api.Instruction.Set;
   6 import static edu.berkeley.fleet.api.Instruction.Set.*;
   7 import static edu.berkeley.fleet.api.Instruction.*;
   8 import static edu.berkeley.fleet.api.Predicate.*;
   9
  10 /** common subclass for the "FleetTwo" generation of processors, all 37-bit wide, with AM33 encoding */
  11 public abstract class FleetTwoFleet extends Fleet {
  12
  13     private final boolean hack = "true".equals(System.getProperty("inverted-dc-bit-hack", "false"));
  14
  15     public final Mask PACKET_TOKEN;
  16     public final Mask PACKET_IS_TOKEN;
  17     public final Mask PACKET_DATA;
  18     public final Mask PACKET_SIGNAL;
  19     public final Mask PACKET_DEST;
  20
  21     public final Mask CBD_SIZE;
  22     public final Mask CBD_OFFSET;
  23
  24     public final Mask WHOLE_WORD;
  25     public final Mask DISPATCH_PATH;
  26     public final Mask DISPATCH_INSTR;
  27     public final Mask NOT_INTERRUPTIBLE;
  28     public final Mask P;
  29     public final Mask P_NOT_A;
  30     public final Mask P_A;
  31     public final Mask P_NOT_B;
  32     public final Mask P_B;
  33     public final Mask P_UNUSED;
  34     public final Mask P_OLC_ZERO;
  35     public final Mask P_OLC_NONZERO;
  36     public final Mask P_ALWAYS;
  37
  38     public final Mask SHIFT;
  39
  40     public final Mask TAIL;
  41     public final Mask HEAD;
  42     public final Mask ABORT;
  43
  44     public final Mask MOVE;
  45     public final Mask TI;
  46     public final Mask DI;
  47     public final Mask FLUSH;
  48     public final Mask DC;
  49     public final Mask DO;
  50     public final Mask TO;
  51     public final Mask PATH_IMMEDIATE;
  52     public final Mask PATH_DATA;
  53     public final Mask PATH_NOCHANGE;
  54
  55     public final Mask SET_OLC_FROM_IMMEDIATE;
  56     public final Mask SET_OLC_FROM_DATA_LATCH;
  57     public final Mask SET_OLC_FROM_OLC_MINUS_ONE;
  58
  59     public final Mask SET_ILC_FROM_IMMEDIATE;
  60     public final Mask SET_ILC_FROM_INFINITY;
  61     public final Mask SET_ILC_FROM_DATA_LATCH;
  62
  63     public final Mask SET_IMMEDIATE;
  64     public final Mask SET_IMMEDIATE_EXTEND;
  65
  66     public final Mask SET_FLAGS;
  67     public final Mask SET_FLAGS_A;
  68     public final Mask SET_FLAGS_B;
  69     public final Mask SET_FLAGS_VALUE_A;
  70     public final Mask SET_FLAGS_VALUE_NOT_A;
  71     public final Mask SET_FLAGS_VALUE_B;
  72     public final Mask SET_FLAGS_VALUE_NOT_B;
  73     public final Mask SET_FLAGS_VALUE_C;
  74     public final Mask SET_FLAGS_VALUE_NOT_C;
  75
  76     public final int  WIDTH_WORD;
  77     public final int  WIDTH_PACKET;
  78
  79     public final long DataLatch_WIDTH;
  80     private final long mask;
  81
  82     public FleetTwoFleet() { this(false); }
  83
  84     public FleetTwoFleet(boolean useInternalEncoding) {
  85         PACKET_TOKEN               = new Mask("v.................................................");
  86         PACKET_IS_TOKEN            = new Mask("1.................................................");
  87         PACKET_DATA                = new Mask(".vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv............");
  88         PACKET_SIGNAL              = new Mask("......................................v...........");
  89         PACKET_DEST                = new Mask(".......................................vvvvvvvvvvv");
  90
  91         CBD_SIZE                   = new Mask("...............................vvvvvv");
  92         CBD_OFFSET                 = new Mask("vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv......");
  93
  94         WHOLE_WORD                 = new Mask("vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv");
  95
  96         if (useInternalEncoding) {
  97
  98             DISPATCH_PATH              = new Mask("v....................................");
  99             DISPATCH_INSTR             = new Mask(".vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv");
 100             P                          = new Mask(".vvvvvv..............................");
 101             P_NOT_A                    = new Mask(".011110..............................");
 102             P_A                        = new Mask(".011101..............................");
 103             P_NOT_B                    = new Mask(".011011..............................");
 104             P_B                        = new Mask(".010111..............................");
 105             P_UNUSED                   = new Mask(".000000..............................");
 106             P_OLC_ZERO                 = new Mask(".101111..............................");
 107             P_OLC_NONZERO              = new Mask(".011111..............................");
 108             P_ALWAYS                   = new Mask(".111111..............................");
 109
 110
 111             // use these when Marina gets updated to 07-Jan-2009 version of internal encoding
 112             HEAD                       = new Mask(".......1.............................");
 113             ABORT                      = new Mask("........1............................");
 114             TAIL                       = new Mask(".........1...........................");
 115
 116             // actually "is interruptible"
 117             NOT_INTERRUPTIBLE          = new Mask("...........1....1....................");
 118
 119             SHIFT                      = new Mask("..........1......1vvvvvvvvvvvvvvvvvvv");
 120             SET_IMMEDIATE              = new Mask("..........1......0.....vvvvvvvvvvvvvv");
 121             SET_IMMEDIATE_EXTEND       = new Mask("..........1......0....v..............");
 122             MOVE                       = new Mask("............1........................");
 123             TI                         = new Mask("............1.....1..................");
 124             DI                         = new Mask("............1......1.................");
 125             FLUSH                      = new Mask("..........1......0.....011...........");
 126             DC                         = new Mask("............1.......1................");
 127             DO                         = new Mask("............1........1...............");
 128             TO                         = new Mask("............1.........1..............");
 129             PATH_IMMEDIATE             = new Mask("............1..........1vvvvvvvvvvvvv");
 130             PATH_DATA                  = new Mask("............1..........00............");
 131             PATH_NOCHANGE              = new Mask("............1..........01............");
 132
 133             SET_OLC_FROM_IMMEDIATE     = new Mask("..............1.10.............vvvvvv");
 134             SET_OLC_FROM_DATA_LATCH    = new Mask("...............1.11..................");
 135             SET_OLC_FROM_OLC_MINUS_ONE = new Mask("...............1.10..................");
 136
 137             SET_ILC_FROM_IMMEDIATE     = new Mask("...............1.00..........0.vvvvvv");
 138             SET_ILC_FROM_INFINITY      = new Mask("...............1.0...........1.......");
 139             SET_ILC_FROM_DATA_LATCH    = new Mask("...............1.01..................");
 140
 141             SET_FLAGS                  = new Mask("...............1.....................");
 142             SET_FLAGS_A                = new Mask("...............1...............vvvvvv");
 143             SET_FLAGS_B                = new Mask("...............1.........vvvvvv......");
 144
 145             SET_FLAGS_VALUE_A          = new Mask(".....1");
 146             SET_FLAGS_VALUE_NOT_A      = new Mask("....1.");
 147             SET_FLAGS_VALUE_B          = new Mask("...1..");
 148             SET_FLAGS_VALUE_NOT_B      = new Mask("..1...");
 149             SET_FLAGS_VALUE_C          = new Mask(".1....");
 150             SET_FLAGS_VALUE_NOT_C      = new Mask("1.....");
 151
 152         } else {
 153             DISPATCH_PATH              = new Mask("vvvvvvvvvvv..........................");
 154             DISPATCH_INSTR             = new Mask("...........vvvvvvvvvvvvvvvvvvvvvvvvvv");
 155             NOT_INTERRUPTIBLE          = new Mask("...........1.........................");
 156             P                          = new Mask(".............vvv.....................");
 157             P_NOT_A                    = new Mask(".............000.....................");
 158             P_A                        = new Mask(".............001.....................");
 159             P_NOT_B                    = new Mask(".............010.....................");
 160             P_B                        = new Mask(".............011.....................");
 161             P_UNUSED                   = new Mask(".............100.....................");
 162             P_OLC_ZERO                 = new Mask(".............101.....................");
 163             P_OLC_NONZERO              = new Mask(".............110.....................");
 164             P_ALWAYS                   = new Mask(".............111.....................");
 165
 166             SHIFT                      = new Mask("................00vvvvvvvvvvvvvvvvvvv");
 167
 168             ABORT                      = new Mask("................1100.................");  // note: has a predicate!
 169
 170             HEAD                       = new Mask("................1110.................");
 171             TAIL                       = new Mask("................1111.................");
 172
 173             MOVE                       = new Mask("................01...................");
 174             TI                         = new Mask("................011..................");
 175             DI                         = new Mask("................01.1.................");
 176             FLUSH                      = new Mask("................01.01................");
 177             DC                         = new Mask("................01.11................");
 178             DO                         = new Mask("................01...1...............");
 179             TO                         = new Mask("................01....1..............");
 180             PATH_IMMEDIATE             = new Mask("................01.....1vvvvvvvvvvvvv");
 181             PATH_DATA                  = new Mask("................01.....01............");
 182             PATH_NOCHANGE              = new Mask("................01.....00............");
 183
 184             SET_OLC_FROM_IMMEDIATE     = new Mask("................101000100......vvvvvv");
 185             SET_OLC_FROM_DATA_LATCH    = new Mask("................101000010............");
 186             SET_OLC_FROM_OLC_MINUS_ONE = new Mask("................101000001............");
 187
 188             SET_ILC_FROM_IMMEDIATE     = new Mask("................10010010......0vvvvvv");
 189             SET_ILC_FROM_INFINITY      = new Mask("................10010010......1......");
 190             SET_ILC_FROM_DATA_LATCH    = new Mask("................10010001.............");
 191
 192             SET_IMMEDIATE              = new Mask("................100010.vvvvvvvvvvvvvv");
 193             SET_IMMEDIATE_EXTEND       = new Mask("................100010v..............");
 194
 195             SET_FLAGS                  = new Mask("................100001...............");
 196             SET_FLAGS_A                = new Mask("................100001...vvvvvv......");
 197             SET_FLAGS_B                = new Mask("................100001.........vvvvvv");
 198
 199             SET_FLAGS_VALUE_A          = new Mask("1.....");
 200             SET_FLAGS_VALUE_NOT_A      = new Mask(".1....");
 201             SET_FLAGS_VALUE_B          = new Mask("..1...");
 202             SET_FLAGS_VALUE_NOT_B      = new Mask("...1..");
 203             SET_FLAGS_VALUE_C          = new Mask("....1.");
 204             SET_FLAGS_VALUE_NOT_C      = new Mask(".....1");
 205         }
 206
 207         WIDTH_WORD                 = PACKET_DATA.valmaskwidth;
 208         WIDTH_PACKET               = PACKET_TOKEN.width;
 209         DataLatch_WIDTH = SET_IMMEDIATE.valmaskmax-SET_IMMEDIATE.valmaskmin+1;  // FIXME: this is an abstraction breakage
 210         mask  = ~(-1L << DataLatch_WIDTH);
 211     }
 212
 213     // Misc //////////////////////////////////////////////////////////////////////////////
 214
 215     public boolean isSmallEnoughToFit(long immediate) {
 216         if ((immediate & ~mask) == 0)   return true;
 217         if ((immediate |  mask) == -1L) return true;
 218         return false;
 219     }
 220
 221     public int getWordWidth() { return 37; }
 222
 223     //////////////////////////////////////////////////////////////////////////////
 224
 225     /** get the bits describing this box's location on the DESTINATION HORN */
 226     protected abstract BitVector getDestAddr(Path box);
 227
 228     private static final BitVector SIGNAL_ZERO = new BitVector(1);
 229     private static final BitVector SIGNAL_ONE  = new BitVector(1).set(0,true);
 230
 231     /** decode a path, given the starting point and the bits that comprise it */
 232     public Path getPathByAddr(Dock source, BitVector dest) {
 233         for(Ship ship : this)
 234             for(Dock bb : ship) {
 235                 for(Destination d : new Destination[] { bb.getInstructionDestination(), bb.getDataDestination() }) {
 236                     for(BitVector signal : new BitVector[] { SIGNAL_ZERO, SIGNAL_ONE }) {
 237                         Path p = (Path)source.getPath(d, signal);
 238                         if (getDestAddr(p).equalsZeroExtended(dest)) return p;
 239                     }
 240                 }
 241             }
 242         return null;
 243     }
 244
 245     public Instruction decodeInstruction(BitVector instruction, Dock dispatchFrom) {
 246         return readInstruction(instruction.toLong(), dispatchFrom);
 247     }
 248
 249     public BitVector   encodeInstruction(Instruction instr, Dock dispatchFrom) {
 250         return new BitVector(getWordWidth()).set(writeInstruction(instr, dispatchFrom));
 251     }
 252
 253     public int getShiftWidth() { return SHIFT.valmaskwidth; }
 254     public int getSetWidth() { return SET_IMMEDIATE.valmaskwidth+1; }
 255
 256     // FIXME: should use BitVector here
 257     public Instruction readInstruction(long inst, Dock dispatchFrom) {
 258         Dock dock = getPathByAddr(dispatchFrom, DISPATCH_PATH.getvalAsBitVector(inst)).getDestination().getDock();
 259
 260         if (TAIL.get(inst))   return new Tail(dock);
 261         if (HEAD.get(inst))   return new Head(dock);
 262
 263         Predicate predicate = Default;
 264         if (P_ALWAYS.get(inst)) predicate = IgnoreFlagD;
 265         if (P_OLC_NONZERO.get(inst))    predicate = Default;
 266         if (P_OLC_ZERO.get(inst))    predicate = FlagD;
 267         if (P_A.get(inst))      predicate = FlagA;
 268         if (P_B.get(inst))      predicate = FlagB;
 269         if (P_NOT_A.get(inst))  predicate = NotFlagA;
 270         if (P_NOT_B.get(inst))  predicate = NotFlagB;
 271
 272         if (FLUSH.get(inst))
 273             return new Flush(dock, false, predicate);
 274         if (ABORT.get(inst))
 275             return new Abort(dock, predicate);
 276         if (SHIFT.get(inst))                return new Shift(dock, false, predicate, new BitVector(dock.getShip().getFleet().getShiftWidth()).set(SHIFT.getval(inst)));
 277         if (SET_IMMEDIATE.get(inst)) {
 278             boolean extend = SET_IMMEDIATE_EXTEND.getval(inst) != 0;
 279             long immediate = SET_IMMEDIATE.getval(inst);
 280             if (extend) immediate |= (-1L << DataLatch_WIDTH);
 281             return new Set(dock, false, predicate, SetDest.DataLatch, (immediate));
 282         }
 283
 284         if (SET_OLC_FROM_OLC_MINUS_ONE.get(inst))
 285             return new Set(dock, false, predicate, SetDest.OuterLoopCounter, SetSource.Decrement);
 286         if (SET_OLC_FROM_IMMEDIATE.get(inst))
 287             return new Set(dock, false, predicate, SetDest.OuterLoopCounter, (SET_OLC_FROM_IMMEDIATE.getval(inst)));
 288         if (SET_ILC_FROM_IMMEDIATE.get(inst))
 289             return new Set(dock, false, predicate, SetDest.InnerLoopCounter, (SET_ILC_FROM_IMMEDIATE.getval(inst)));
 290         if (SET_OLC_FROM_DATA_LATCH.get(inst))
 291             return new Set(dock, false, predicate, SetDest.OuterLoopCounter, SetSource.DataLatch);
 292         if (SET_ILC_FROM_DATA_LATCH.get(inst))
 293             return new Set(dock, false, predicate, SetDest.InnerLoopCounter, SetSource.DataLatch);
 294         if (SET_ILC_FROM_INFINITY.get(inst))
 295             return new Set(dock, false, predicate, SetDest.InnerLoopCounter, SetSource.Infinity);
 296         if (SET_FLAGS.get(inst)) {
 297             long flag_a = SET_FLAGS_A.getval(inst);
 298             long flag_b = SET_FLAGS_B.getval(inst);
 299             FlagFunction ap = FlagFunction.ZERO;
 300             FlagFunction bp = FlagFunction.ZERO;
 301             if (SET_FLAGS_VALUE_A    .get(flag_a)) ap = ap.add(FlagA    );
 302             if (SET_FLAGS_VALUE_NOT_A.get(flag_a)) ap = ap.add(NotFlagA );
 303             if (SET_FLAGS_VALUE_B    .get(flag_a)) ap = ap.add(FlagB    );
 304             if (SET_FLAGS_VALUE_NOT_B.get(flag_a)) ap = ap.add(NotFlagB );
 305             if (SET_FLAGS_VALUE_C    .get(flag_a)) ap = ap.add(FlagC    );
 306             if (SET_FLAGS_VALUE_NOT_C.get(flag_a)) ap = ap.add(NotFlagC );
 307             if (SET_FLAGS_VALUE_A    .get(flag_b)) bp = bp.add(FlagA    );
 308             if (SET_FLAGS_VALUE_NOT_A.get(flag_b)) bp = bp.add(NotFlagA );
 309             if (SET_FLAGS_VALUE_B    .get(flag_b)) bp = bp.add(FlagB    );
 310             if (SET_FLAGS_VALUE_NOT_B.get(flag_b)) bp = bp.add(NotFlagB );
 311             if (SET_FLAGS_VALUE_C    .get(flag_b)) bp = bp.add(FlagC    );
 312             if (SET_FLAGS_VALUE_NOT_C.get(flag_b)) bp = bp.add(NotFlagC );
 313             return new Set(dock, false, predicate, ap, bp);
 314         }
 315         if (MOVE.get(inst))
 316             return new Move(dock,
 317                             false,
 318                             predicate,
 319                             !NOT_INTERRUPTIBLE.get(inst),
 320                             PATH_DATA.get(inst)?null:getPathByAddr(dock, PATH_IMMEDIATE.getvalAsBitVector(inst)),
 321                             TI.get(inst),
 322                             DI.get(inst),
 323                             hack?(!DC.get(inst)):DC.get(inst),
 324                             PATH_DATA.get(inst),
 325                             DO.get(inst),
 326                             TO.get(inst)
 327                             );
 328         throw new RuntimeException("unknown instruction: 0x" + Long.toString(inst, 16));
 329     }
 330
 331     // FIXME: should use BitVector here
 332     public long writeInstruction(Instruction d, Dock dispatchFrom) {
 333         long instr = 0;
 334
 335         if (d.dock != null) {
 336             BitVector bv = getDestAddr(dispatchFrom.getPath(d.dock.getInstructionDestination(),null));
 337             BitVector bv2 = new BitVector(DISPATCH_PATH.valmaskwidth);
 338             for(int i=0; i<Math.min(bv.length(),bv2.length()); i++)
 339                 bv2.set(i, bv.get(i));
 340             instr = DISPATCH_PATH.setval(instr, bv2);
 341         }
 342
 343         boolean dl = false;
 344         Instruction pi = d;
 345         switch(pi.predicate) {
 346             case IgnoreFlagD:         instr = P_ALWAYS.set(instr); break;
 347             case FlagD:         instr = P_OLC_ZERO.set(instr); break;
 348             case Default: instr = P_OLC_NONZERO.set(instr); break;
 349             case FlagA:      instr = P_A.set(instr);      break;
 350             case FlagB:      instr = P_B.set(instr);      break;
 351             case NotFlagA:  instr = P_NOT_A.set(instr);      break;
 352             case NotFlagB:  instr = P_NOT_B.set(instr);      break;
 353             default: throw new RuntimeException("error!");
 354         }
 355
 356         if (d instanceof Tail) {
 357             instr = TAIL.set(instr);
 358
 359         } else if (d instanceof Head) {
 360             instr = HEAD.set(instr);
 361
 362         } else if (d instanceof Shift) {
 363             Shift shift = (Shift)d;
 364             instr = SHIFT.set(instr);
 365             instr = SHIFT.setval(instr, shift.immediate);
 366
 367         } else if (d instanceof Flush) {
 368             instr = FLUSH.set(instr);
 369
 370         } else if (d instanceof Abort) {
 371             instr = ABORT.set(instr);
 372
 373         } else if (d instanceof Set) {
 374             Set s = (Set)d;
 375             switch(s.dest) {
 376                 case InnerLoopCounter:
 377                     switch(s.source) {
 378                         case DataLatch:
 379                             instr = SET_ILC_FROM_DATA_LATCH.set(instr);
 380                             break;
 381                         case Immediate:
 382                             instr = SET_ILC_FROM_IMMEDIATE.setval(SET_ILC_FROM_IMMEDIATE.set(instr), s.immediate);
 383                             break;
 384                         case Infinity:
 385                             instr = SET_ILC_FROM_INFINITY.set(instr);
 386                             break;
 387                     }
 388                     break;
 389                 case OuterLoopCounter:
 390                     switch(s.source) {
 391                         case Decrement:
 392                             instr = SET_OLC_FROM_OLC_MINUS_ONE.set(instr);
 393                             break;
 394                         case DataLatch:
 395                             instr = SET_OLC_FROM_DATA_LATCH.set(instr);
 396                             break;
 397                         case Immediate:
 398                             instr = SET_OLC_FROM_IMMEDIATE.setval(SET_OLC_FROM_IMMEDIATE.set(instr), s.immediate);
 399                             break;
 400                     }
 401                     break;
 402                 case Flags: {
 403                     instr = SET_FLAGS.set(instr);
 404                     instr = SET_FLAGS_A.setval(instr, flagFunctionToLong(s.newFlagA));
 405                     instr = SET_FLAGS_B.setval(instr, flagFunctionToLong(s.newFlagB));
 406                     break;
 407                 }
 408                 case DataLatch: {
 409                     instr = SET_IMMEDIATE.set(instr);
 410                     instr = SET_IMMEDIATE_EXTEND.setval(instr, s.immediate < 0 ? 1 : 0);
 411                     instr = SET_IMMEDIATE.setval(instr, s.immediate & ~(-1L << DataLatch_WIDTH));
 412                     break;
 413                 }
 414             }
 415
 416         } else if (d instanceof Move) {
 417             Move inst = (Move)d;
 418             instr  = MOVE.set(instr);
 419             if (inst.tokenIn)                    instr = TI.set(instr);
 420             if (inst.dataIn)                     instr = DI.set(instr);
 421             if (hack) {
 422                 if (!inst.latchData)                 instr = DC.set(instr);
 423                 System.err.println("WARNING: employing inverted-Dc-bit hack -- DO NOT FORGET TO DISABLE THIS WHEN THE NETLIST GETS UPDATED!");
 424             } else {
 425                 if (inst.latchData)                  instr = DC.set(instr);
 426             }
 427             if (inst.dataOut)                    instr = DO.set(instr);
 428             if (inst.tokenOut)                   instr = TO.set(instr);
 429             if (!inst.interruptible)             instr = NOT_INTERRUPTIBLE.set(instr);
 430
 431             if (inst.latchPath)                  instr = PATH_DATA.set(instr);
 432             else if (inst.path!=null) {
 433                 instr  = PATH_IMMEDIATE.set(instr);
 434                 BitVector bv  = getDestAddr(inst.path);
 435                 BitVector bv2 = new BitVector(PATH_IMMEDIATE.valmaskwidth);
 436                 for(int i=0; i<Math.min(bv.length(),bv2.length()); i++)
 437                     bv2.set(i, bv.get(i));
 438                 instr  = PATH_IMMEDIATE.setval(instr, bv2);
 439             } else {
 440                 instr  = PATH_NOCHANGE.set(instr);
 441             }
 442
 443         } else {
 444             throw new RuntimeException("unrecognized instruction " + d.getClass().getName());
 445
 446         }
 447         return instr;
 448     }
 449
 450     private long flagFunctionToLong(FlagFunction ff) {
 451         long ret = 0;
 452         for(Predicate p : ff)
 453             switch(p) {
 454                 case FlagA    : ret = SET_FLAGS_VALUE_A    .set(ret); break;
 455                 case NotFlagA : ret = SET_FLAGS_VALUE_NOT_A.set(ret); break;
 456                 case FlagB    : ret = SET_FLAGS_VALUE_B    .set(ret); break;
 457                 case NotFlagB : ret = SET_FLAGS_VALUE_NOT_B.set(ret); break;
 458                 case FlagC    : ret = SET_FLAGS_VALUE_C    .set(ret); break;
 459                 case NotFlagC : ret = SET_FLAGS_VALUE_NOT_C.set(ret); break;
 460                 default: throw new RuntimeException();
 461             }
 462         return ret;
 463     }
 464
 465 }