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 OS;
  29     public final Mask P;
  30     public final Mask P_NOT_A;
  31     public final Mask P_A;
  32     public final Mask P_NOT_B;
  33     public final Mask P_B;
  34     public final Mask P_UNUSED;
  35     public final Mask P_OLC_ZERO;
  36     public final Mask P_OLC_NONZERO;
  37     public final Mask P_ALWAYS;
  38
  39     public final Mask SHIFT;
  40
  41     public final Mask TAIL;
  42     public final Mask HEAD;
  43     public final Mask ABORT;
  44
  45     public final Mask MOVE;
  46     public final Mask TI;
  47     public final Mask DI;
  48     public final Mask FLUSH;
  49     public final Mask DC;
  50     public final Mask DO;
  51     public final Mask TO;
  52     public final Mask PATH_IMMEDIATE;
  53     public final Mask PATH_DATA;
  54     public final Mask PATH_NOCHANGE;
  55
  56     public final Mask SET_OLC_FROM_IMMEDIATE;
  57     public final Mask SET_OLC_FROM_DATA_LATCH;
  58     public final Mask SET_OLC_FROM_OLC_MINUS_ONE;
  59
  60     public final Mask SET_ILC_FROM_IMMEDIATE;
  61     public final Mask SET_ILC_FROM_INFINITY;
  62     public final Mask SET_ILC_FROM_DATA_LATCH;
  63
  64     public final Mask SET_IMMEDIATE;
  65     public final Mask SET_IMMEDIATE_EXTEND;
  66
  67     public final Mask SET_FLAGS;
  68     public final Mask SET_FLAGS_A;
  69     public final Mask SET_FLAGS_B;
  70     public final Mask SET_FLAGS_VALUE_A;
  71     public final Mask SET_FLAGS_VALUE_NOT_A;
  72     public final Mask SET_FLAGS_VALUE_B;
  73     public final Mask SET_FLAGS_VALUE_NOT_B;
  74     public final Mask SET_FLAGS_VALUE_C;
  75     public final Mask SET_FLAGS_VALUE_NOT_C;
  76
  77     public final int  WIDTH_WORD;
  78     public final int  WIDTH_PACKET;
  79
  80     public final long DataLatch_WIDTH;
  81     private final long mask;
  82
  83     public FleetTwoFleet() { this(false); }
  84
  85     public FleetTwoFleet(boolean useInternalEncoding) {
  86         PACKET_TOKEN               = new Mask("v.................................................");
  87         PACKET_IS_TOKEN            = new Mask("1.................................................");
  88         PACKET_DATA                = new Mask(".vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv............");
  89         PACKET_SIGNAL              = new Mask("......................................v...........");
  90         PACKET_DEST                = new Mask(".......................................vvvvvvvvvvv");
  91
  92         CBD_SIZE                   = new Mask("...............................vvvvvv");
  93         CBD_OFFSET                 = new Mask("vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv......");
  94
  95         WHOLE_WORD                 = new Mask("vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv");
  96
  97         if (useInternalEncoding) {
  98
  99             DISPATCH_PATH              = new Mask("v....................................");
 100             DISPATCH_INSTR             = new Mask(".vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv");
 101             NOT_INTERRUPTIBLE          = new Mask(".................1...................");
 102             OS                         = new Mask(".......1.............................");
 103             P                          = new Mask(".vvvvvv..............................");
 104             P_NOT_A                    = new Mask(".011110..............................");
 105             P_A                        = new Mask(".011101..............................");
 106             P_NOT_B                    = new Mask(".011011..............................");
 107             P_B                        = new Mask(".010111..............................");
 108             P_UNUSED                   = new Mask(".000000..............................");
 109             P_OLC_ZERO                 = new Mask(".101111..............................");
 110             P_OLC_NONZERO              = new Mask(".011111..............................");
 111             P_ALWAYS                   = new Mask(".111111..............................");
 112
 113             SHIFT                      = new Mask("..........101111.1vvvvvvvvvvvvvvvvvvv");
 114
 115             TAIL                       = new Mask("................1...................0");
 116             HEAD                       = null;
 117             ABORT                      = null;
 118
 119             MOVE                       = new Mask("..........110111.....................");
 120             TI                         = new Mask("..........110111..1..................");
 121             DI                         = new Mask("..........110111...1.................");
 122             FLUSH                      = new Mask(".........1110111.....................");
 123             DC                         = new Mask("..........110111....1................");
 124             DO                         = new Mask("..........110111.....1...............");
 125             TO                         = new Mask("..........110111......1..............");
 126             PATH_IMMEDIATE             = new Mask("..........110111.......1vvvvvvvvvvvvv");
 127             PATH_DATA                  = new Mask("..........110111.......00............");
 128             PATH_NOCHANGE              = new Mask("..........110111.......01............");
 129
 130             SET_OLC_FROM_IMMEDIATE     = new Mask("..........111101.0.............vvvvvv");
 131             SET_OLC_FROM_DATA_LATCH    = new Mask("..........111101.1...................");
 132             SET_OLC_FROM_OLC_MINUS_ONE = new Mask("..........111011.....................");
 133
 134             SET_ILC_FROM_IMMEDIATE     = new Mask("..........011111.0...........0.vvvvvv");
 135             SET_ILC_FROM_INFINITY      = new Mask("..........011111.............1.......");
 136             SET_ILC_FROM_DATA_LATCH    = new Mask("..........011111.1...................");
 137
 138             SET_IMMEDIATE              = new Mask("..........101111.0.....vvvvvvvvvvvvvv");
 139             SET_IMMEDIATE_EXTEND       = new Mask("..........101111.0....v..............");
 140
 141             SET_FLAGS                  = new Mask("..........111110.....................");
 142             SET_FLAGS_A                = new Mask("..........111110...............vvvvvv");
 143             SET_FLAGS_B                = new Mask("..........111110.........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             OS                         = new Mask("............1........................");
 157             P                          = new Mask(".............vvv.....................");
 158             P_NOT_A                    = new Mask(".............000.....................");
 159             P_A                        = new Mask(".............001.....................");
 160             P_NOT_B                    = new Mask(".............010.....................");
 161             P_B                        = new Mask(".............011.....................");
 162             P_UNUSED                   = new Mask(".............100.....................");
 163             P_OLC_ZERO                 = new Mask(".............101.....................");
 164             P_OLC_NONZERO              = new Mask(".............110.....................");
 165             P_ALWAYS                   = new Mask(".............111.....................");
 166
 167             SHIFT                      = new Mask("................00vvvvvvvvvvvvvvvvvvv");
 168
 169             ABORT                      = new Mask("................1100.................");  // note: has a predicate!
 170
 171             HEAD                       = new Mask("................1110.................");
 172             TAIL                       = new Mask("................1111.................");
 173
 174             MOVE                       = new Mask("................01...................");
 175             TI                         = new Mask("................011..................");
 176             DI                         = new Mask("................01.1.................");
 177             FLUSH                      = new Mask("................01.01................");
 178             DC                         = new Mask("................01.11................");
 179             DO                         = new Mask("................01...1...............");
 180             TO                         = new Mask("................01....1..............");
 181             PATH_IMMEDIATE             = new Mask("................01.....1vvvvvvvvvvvvv");
 182             PATH_DATA                  = new Mask("................01.....01............");
 183             PATH_NOCHANGE              = new Mask("................01.....00............");
 184
 185             SET_OLC_FROM_IMMEDIATE     = new Mask("................101000100......vvvvvv");
 186             SET_OLC_FROM_DATA_LATCH    = new Mask("................101000010............");
 187             SET_OLC_FROM_OLC_MINUS_ONE = new Mask("................101000001............");
 188
 189             SET_ILC_FROM_IMMEDIATE     = new Mask("................10010010......0vvvvvv");
 190             SET_ILC_FROM_INFINITY      = new Mask("................10010010......1......");
 191             SET_ILC_FROM_DATA_LATCH    = new Mask("................10010001.............");
 192
 193             SET_IMMEDIATE              = new Mask("................100010.vvvvvvvvvvvvvv");
 194             SET_IMMEDIATE_EXTEND       = new Mask("................100010v..............");
 195
 196             SET_FLAGS                  = new Mask("................100001...............");
 197             SET_FLAGS_A                = new Mask("................100001...vvvvvv......");
 198             SET_FLAGS_B                = new Mask("................100001.........vvvvvv");
 199
 200             SET_FLAGS_VALUE_A          = new Mask("1.....");
 201             SET_FLAGS_VALUE_NOT_A      = new Mask(".1....");
 202             SET_FLAGS_VALUE_B          = new Mask("..1...");
 203             SET_FLAGS_VALUE_NOT_B      = new Mask("...1..");
 204             SET_FLAGS_VALUE_C          = new Mask("....1.");
 205             SET_FLAGS_VALUE_NOT_C      = new Mask(".....1");
 206         }
 207
 208         WIDTH_WORD                 = PACKET_DATA.valmaskwidth;
 209         WIDTH_PACKET               = PACKET_TOKEN.width;
 210         DataLatch_WIDTH = SET_IMMEDIATE.valmaskmax-SET_IMMEDIATE.valmaskmin+1;  // FIXME: this is an abstraction breakage
 211         mask  = ~(-1L << DataLatch_WIDTH);
 212     }
 213
 214     // Misc //////////////////////////////////////////////////////////////////////////////
 215
 216     public boolean isSmallEnoughToFit(long immediate) {
 217         if ((immediate & ~mask) == 0)   return true;
 218         if ((immediate |  mask) == -1L) return true;
 219         return false;
 220     }
 221
 222     public int getWordWidth() { return 37; }
 223
 224     //////////////////////////////////////////////////////////////////////////////
 225
 226     /** get the bits describing this box's location on the DESTINATION HORN */
 227     protected abstract BitVector getDestAddr(Path box);
 228
 229     private static final BitVector SIGNAL_ZERO = new BitVector(1);
 230     private static final BitVector SIGNAL_ONE  = new BitVector(1).set(0,true);
 231
 232     /** decode a path, given the starting point and the bits that comprise it */
 233     public Path getPathByAddr(Dock source, BitVector dest) {
 234         for(Ship ship : this)
 235             for(Dock bb : ship) {
 236                 for(Destination d : new Destination[] { bb.getInstructionDestination(), bb.getDataDestination() }) {
 237                     for(BitVector signal : new BitVector[] { SIGNAL_ZERO, SIGNAL_ONE }) {
 238                         Path p = (Path)source.getPath(d, signal);
 239                         if (getDestAddr(p).equalsZeroExtended(dest)) return p;
 240                     }
 241                 }
 242             }
 243         return null;
 244     }
 245
 246     public Instruction decodeInstruction(BitVector instruction, Dock dispatchFrom) {
 247         return readInstruction(instruction.toLong(), dispatchFrom);
 248     }
 249
 250     public BitVector   encodeInstruction(Instruction instr, Dock dispatchFrom) {
 251         return new BitVector(getWordWidth()).set(writeInstruction(instr, dispatchFrom));
 252     }
 253
 254     public int getShiftWidth() { return SHIFT.valmaskwidth; }
 255     public int getSetWidth() { return SET_IMMEDIATE.valmaskwidth+1; }
 256
 257     // FIXME: should use BitVector here
 258     public Instruction readInstruction(long inst, Dock dispatchFrom) {
 259         Dock dock = getPathByAddr(dispatchFrom, DISPATCH_PATH.getvalAsBitVector(inst)).getDestination().getDock();
 260
 261         if (TAIL.get(inst))   return new Tail(dock);
 262         if (HEAD.get(inst))   return new Head(dock);
 263
 264         Predicate predicate = Default;
 265         if (P_ALWAYS.get(inst)) predicate = IgnoreFlagD;
 266         if (P_OLC_NONZERO.get(inst))    predicate = Default;
 267         if (P_OLC_ZERO.get(inst))    predicate = FlagD;
 268         if (P_A.get(inst))      predicate = FlagA;
 269         if (P_B.get(inst))      predicate = FlagB;
 270         if (P_NOT_A.get(inst))  predicate = NotFlagA;
 271         if (P_NOT_B.get(inst))  predicate = NotFlagB;
 272
 273         boolean looping = !OS.get(inst);
 274         if (FLUSH.get(inst))
 275             return new Flush(dock, looping, predicate);
 276         if (ABORT.get(inst))
 277             return new Abort(dock, predicate);
 278         if (SHIFT.get(inst))                return new Shift(dock, looping, predicate, new BitVector(dock.getShip().getFleet().getShiftWidth()).set(SHIFT.getval(inst)));
 279         if (SET_IMMEDIATE.get(inst)) {
 280             boolean extend = SET_IMMEDIATE_EXTEND.getval(inst) != 0;
 281             long immediate = SET_IMMEDIATE.getval(inst);
 282             if (extend) immediate |= (-1L << DataLatch_WIDTH);
 283             return new Set(dock, looping, predicate, SetDest.DataLatch, (immediate));
 284         }
 285
 286         if (SET_OLC_FROM_OLC_MINUS_ONE.get(inst))
 287             return new Set(dock, looping, predicate, SetDest.OuterLoopCounter, SetSource.Decrement);
 288         if (SET_OLC_FROM_IMMEDIATE.get(inst))
 289             return new Set(dock, looping, predicate, SetDest.OuterLoopCounter, (SET_OLC_FROM_IMMEDIATE.getval(inst)));
 290         if (SET_ILC_FROM_IMMEDIATE.get(inst))
 291             return new Set(dock, looping, predicate, SetDest.InnerLoopCounter, (SET_ILC_FROM_IMMEDIATE.getval(inst)));
 292         if (SET_OLC_FROM_DATA_LATCH.get(inst))
 293             return new Set(dock, looping, predicate, SetDest.OuterLoopCounter, SetSource.DataLatch);
 294         if (SET_ILC_FROM_DATA_LATCH.get(inst))
 295             return new Set(dock, looping, predicate, SetDest.InnerLoopCounter, SetSource.DataLatch);
 296         if (SET_ILC_FROM_INFINITY.get(inst))
 297             return new Set(dock, looping, predicate, SetDest.InnerLoopCounter, SetSource.Infinity);
 298         if (SET_FLAGS.get(inst)) {
 299             long flag_a = SET_FLAGS_A.getval(inst);
 300             long flag_b = SET_FLAGS_B.getval(inst);
 301             FlagFunction ap = FlagFunction.ZERO;
 302             FlagFunction bp = FlagFunction.ZERO;
 303             if (SET_FLAGS_VALUE_A    .get(flag_a)) ap = ap.add(FlagA    );
 304             if (SET_FLAGS_VALUE_NOT_A.get(flag_a)) ap = ap.add(NotFlagA );
 305             if (SET_FLAGS_VALUE_B    .get(flag_a)) ap = ap.add(FlagB    );
 306             if (SET_FLAGS_VALUE_NOT_B.get(flag_a)) ap = ap.add(NotFlagB );
 307             if (SET_FLAGS_VALUE_C    .get(flag_a)) ap = ap.add(FlagC    );
 308             if (SET_FLAGS_VALUE_NOT_C.get(flag_a)) ap = ap.add(NotFlagC );
 309             if (SET_FLAGS_VALUE_A    .get(flag_b)) bp = bp.add(FlagA    );
 310             if (SET_FLAGS_VALUE_NOT_A.get(flag_b)) bp = bp.add(NotFlagA );
 311             if (SET_FLAGS_VALUE_B    .get(flag_b)) bp = bp.add(FlagB    );
 312             if (SET_FLAGS_VALUE_NOT_B.get(flag_b)) bp = bp.add(NotFlagB );
 313             if (SET_FLAGS_VALUE_C    .get(flag_b)) bp = bp.add(FlagC    );
 314             if (SET_FLAGS_VALUE_NOT_C.get(flag_b)) bp = bp.add(NotFlagC );
 315             return new Set(dock, looping, predicate, ap, bp);
 316         }
 317         if (MOVE.get(inst))
 318             return new Move(dock,
 319                             looping,
 320                             predicate,
 321                             !NOT_INTERRUPTIBLE.get(inst),
 322                             getPathByAddr(dock, PATH_IMMEDIATE.getvalAsBitVector(inst)),
 323                             TI.get(inst),
 324                             DI.get(inst),
 325                             hack?(!DC.get(inst)):DC.get(inst),
 326                             PATH_DATA.get(inst),
 327                             DO.get(inst),
 328                             TO.get(inst)
 329                             );
 330         throw new RuntimeException("unknown instruction: 0x" + Long.toString(inst, 16));
 331     }
 332
 333     // FIXME: should use BitVector here
 334     public long writeInstruction(Instruction d, Dock dispatchFrom) {
 335         long instr = 0;
 336
 337         if (d.dock != null) {
 338             BitVector bv = getDestAddr(dispatchFrom.getPath(d.dock.getInstructionDestination(),null));
 339             BitVector bv2 = new BitVector(DISPATCH_PATH.valmaskwidth);
 340             for(int i=0; i<Math.min(bv.length(),bv2.length()); i++)
 341                 bv2.set(i, bv.get(i));
 342             instr = DISPATCH_PATH.setval(instr, bv2);
 343         }
 344
 345         boolean dl = false;
 346         Instruction pi = d;
 347         if (!pi.looping) instr = OS.set(instr);
 348         switch(pi.predicate) {
 349             case IgnoreFlagD:         instr = P_ALWAYS.set(instr); break;
 350             case FlagD:         instr = P_OLC_ZERO.set(instr); break;
 351             case Default: instr = P_OLC_NONZERO.set(instr); break;
 352             case FlagA:      instr = P_A.set(instr);      break;
 353             case FlagB:      instr = P_B.set(instr);      break;
 354             case NotFlagA:  instr = P_NOT_A.set(instr);      break;
 355             case NotFlagB:  instr = P_NOT_B.set(instr);      break;
 356             default: throw new RuntimeException("error!");
 357         }
 358
 359         if (d instanceof Tail) {
 360             instr = TAIL.set(instr);
 361
 362         } else if (d instanceof Head) {
 363             instr = HEAD.set(instr);
 364
 365         } else if (d instanceof Shift) {
 366             Shift shift = (Shift)d;
 367             instr = SHIFT.set(instr);
 368             instr = SHIFT.setval(instr, shift.immediate);
 369
 370         } else if (d instanceof Flush) {
 371             instr = FLUSH.set(instr);
 372
 373         } else if (d instanceof Abort) {
 374             instr = ABORT.set(instr);
 375
 376         } else if (d instanceof Set) {
 377             Set s = (Set)d;
 378             switch(s.dest) {
 379                 case InnerLoopCounter:
 380                     switch(s.source) {
 381                         case DataLatch:
 382                             instr = SET_ILC_FROM_DATA_LATCH.set(instr);
 383                             break;
 384                         case Immediate:
 385                             instr = SET_ILC_FROM_IMMEDIATE.setval(SET_ILC_FROM_IMMEDIATE.set(instr), s.immediate);
 386                             break;
 387                         case Infinity:
 388                             instr = SET_ILC_FROM_INFINITY.set(instr);
 389                             break;
 390                     }
 391                     break;
 392                 case OuterLoopCounter:
 393                     switch(s.source) {
 394                         case Decrement:
 395                             instr = SET_OLC_FROM_OLC_MINUS_ONE.set(instr);
 396                             break;
 397                         case DataLatch:
 398                             instr = SET_OLC_FROM_DATA_LATCH.set(instr);
 399                             break;
 400                         case Immediate:
 401                             instr = SET_OLC_FROM_IMMEDIATE.setval(SET_OLC_FROM_IMMEDIATE.set(instr), s.immediate);
 402                             break;
 403                     }
 404                     break;
 405                 case Flags: {
 406                     instr = SET_FLAGS.set(instr);
 407                     instr = SET_FLAGS_A.setval(instr, flagFunctionToLong(s.newFlagA));
 408                     instr = SET_FLAGS_B.setval(instr, flagFunctionToLong(s.newFlagB));
 409                     break;
 410                 }
 411                 case DataLatch: {
 412                     instr = SET_IMMEDIATE.set(instr);
 413                     instr = SET_IMMEDIATE_EXTEND.setval(instr, s.immediate < 0 ? 1 : 0);
 414                     instr = SET_IMMEDIATE.setval(instr, s.immediate & ~(-1L << DataLatch_WIDTH));
 415                     break;
 416                 }
 417             }
 418
 419         } else if (d instanceof Move) {
 420             Move inst = (Move)d;
 421             instr  = MOVE.set(instr);
 422             if (inst.tokenIn)                    instr = TI.set(instr);
 423             if (inst.dataIn)                     instr = DI.set(instr);
 424             if (hack) {
 425                 if (!inst.latchData)                 instr = DC.set(instr);
 426                 System.err.println("WARNING: employing inverted-Dc-bit hack -- DO NOT FORGET TO DISABLE THIS WHEN THE NETLIST GETS UPDATED!");
 427             } else {
 428                 if (inst.latchData)                  instr = DC.set(instr);
 429             }
 430             if (inst.dataOut)                    instr = DO.set(instr);
 431             if (inst.tokenOut)                   instr = TO.set(instr);
 432             if (!inst.interruptible)             instr = NOT_INTERRUPTIBLE.set(instr);
 433
 434             if (inst.latchPath)                  instr = PATH_DATA.set(instr);
 435             else if (inst.path!=null) {
 436                 instr  = PATH_IMMEDIATE.set(instr);
 437                 BitVector bv  = getDestAddr(inst.path);
 438                 BitVector bv2 = new BitVector(PATH_IMMEDIATE.valmaskwidth);
 439                 for(int i=0; i<Math.min(bv.length(),bv2.length()); i++)
 440                     bv2.set(i, bv.get(i));
 441                 instr  = PATH_IMMEDIATE.setval(instr, bv2);
 442             } else {
 443                 instr  = PATH_NOCHANGE.set(instr);
 444             }
 445
 446         } else {
 447             throw new RuntimeException("unrecognized instruction " + d.getClass().getName());
 448
 449         }
 450         return instr;
 451     }
 452
 453     private long flagFunctionToLong(FlagFunction ff) {
 454         long ret = 0;
 455         for(Predicate p : ff)
 456             switch(p) {
 457                 case FlagA    : ret = SET_FLAGS_VALUE_A    .set(ret); break;
 458                 case NotFlagA : ret = SET_FLAGS_VALUE_NOT_A.set(ret); break;
 459                 case FlagB    : ret = SET_FLAGS_VALUE_B    .set(ret); break;
 460                 case NotFlagB : ret = SET_FLAGS_VALUE_NOT_B.set(ret); break;
 461                 case FlagC    : ret = SET_FLAGS_VALUE_C    .set(ret); break;
 462                 case NotFlagC : ret = SET_FLAGS_VALUE_NOT_C.set(ret); break;
 463                 default: throw new RuntimeException();
 464             }
 465         return ret;
 466     }
 467
 468 }