src/dps8/dps8

/* */
This source file includes following definitions.
dump_flags
dps8_strupr
get_iwb_info
disassemble
get_mod_string
Add36b
Sub36b
Add18b
Sub18b
Add72b
Sub72b
compl36
compl18
copyBytes
copyChars
putByte
putChar
convert_to_word72
convert_to_word36
cmp36
cmp18
cmp36wl
cmp72
strlower
strmask
rtrim
ltrim
trim
stripquotes
cfg_parse
cfg_parse_done
strdupesc
extrASCII36
extr36
putASCII36
put36
extractASCII36FromBuffer
extractWord36FromBuffer
insertASCII36toBuffer
insertWord36toBuffer
print_uint128o_r
print_int128o
print_uint128_r
print_int128
timespec_diff
   1 /*
   2  * vim: filetype=c:tabstop=4:ai:expandtab
   3  * SPDX-License-Identifier: ICU
   4  * scspell-id: 1414c8ee-f62f-11ec-885a-80ee73e9b8e7
   5  *
   6  * ---------------------------------------------------------------------------
   7  *
   8  * Copyright (c) 2007-2013 Michael Mondy
   9  * Copyright (c) 2012-2016 Harry Reed
  10  * Copyright (c) 2013-2016 Charles Anthony
  11  * Copyright (c) 2021-2023 The DPS8M Development Team
  12  *
  13  * All rights reserved.
  14  *
  15  * This software is made available under the terms of the ICU
  16  * License, version 1.8.1 or later.  For more details, see the
  17  * LICENSE.md file at the top-level directory of this distribution.
  18  *
  19  * ---------------------------------------------------------------------------
  20  */
  21 
  22 #include <stdio.h>
  23 #include <string.h>
  24 #include <signal.h>
  25 #include <ctype.h>
  26 
  27 #include "dps8.h"
  28 #include "dps8_sys.h"
  29 #include "dps8_faults.h"
  30 #include "dps8_scu.h"
  31 #include "dps8_iom.h"
  32 #include "dps8_cable.h"
  33 #include "dps8_cpu.h"
  34 #include "dps8_ins.h"
  35 #include "dps8_opcodetable.h"
  36 #include "dps8_utils.h"
  37 
  38 #define DBG_CTR 1
  39 
  40 #ifdef TESTING
  41 # undef FREE
  42 # define FREE(p) free(p)
  43 #endif /* ifdef TESTING */
  44 
  45 /*
  46  * misc utility routines used by simulator
  47  */
  48 
  49 char * dump_flags(char * buffer, word18 flags)
     /*  */
  50 {
  51     sprintf(buffer, "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
  52             flags & I_HEX   ? "Hex "   : "",  // L68 will never have I_HEX set, so no need to DPS8M-only
  53             flags & I_ABS   ? "Abs "   : "",
  54             flags & I_MIF   ? "MIF "   : "",
  55             flags & I_TRUNC ? "Trunc " : "",
  56             flags & I_NBAR  ? "~BAR "  : "",
  57             flags & I_PMASK ? "PMask " : "",
  58             flags & I_PERR  ? "PErr"   : "",
  59             flags & I_TALLY ? "Tally " : "",
  60             flags & I_OMASK ? "OMASK " : "",
  61             flags & I_EUFL  ? "EUFL "  : "",
  62             flags & I_EOFL  ? "EOFL "  : "",
  63             flags & I_OFLOW ? "Ovr "   : "",
  64             flags & I_CARRY ? "Carry " : "",
  65             flags & I_NEG   ? "Neg "   : "",
  66             flags & I_ZERO  ? "Zero "  : ""
  67             );
  68     return buffer;
  69 
  70 }
  71 
  72 static char * dps8_strupr(char *str)
     /*  */
  73 {
  74     char *s;
  75 
  76     for(s = str; *s; s++)
  77         *s = (char) toupper((unsigned char)*s);
  78     return str;
  79 }
  80 
  81 //! get instruction info for IWB ...
  82 
  83 static struct opcode_s unimplented = {"(unimplemented)", 0, 0, 0, 0};
  84 
  85 struct opcode_s * get_iwb_info  (DCDstruct * i)
     /*  */
  86   {
  87     struct opcode_s * p = &opcodes10[i->opcode10];
  88     return p->mne ? p : &unimplented;
  89   }
  90 
  91 char *disassemble(char * result, word36 instruction)
     /*  */
  92 {
  93     uint32 opcode   = GET_OP(instruction);   ///< get opcode
  94     uint32 opcodeX  = GET_OPX(instruction);  ///< opcode extension
  95     uint32 opcode10 = opcode | (opcodeX ? 01000 : 0);
  96     word18 address  = GET_ADDR(instruction);
  97     word1  a        = GET_A(instruction);
  98     //int32 i       = GET_I(instruction);
  99     word6  tag      = GET_TAG(instruction);
 100 
 101     //static char result[132] = "???";
 102     strcpy(result, "???");
 103 
 104     // get mnemonic ...
 105     if (opcodes10[opcode10].mne)
 106         strcpy(result, opcodes10[opcode10].mne);
 107 
 108     // XXX need to reconstruct multi-word EIS instruction.
 109 
 110     char buff[64];
 111 
 112     if (a)
 113     {
 114         int n = (address >> 15) & 07;
 115         int offset = address & 077777;
 116 
 117         sprintf(buff, " pr%d|%o", n, offset);
 118         strcat (result, buff);
 119         // return dps8_strupr(result);
 120     } else {
 121         sprintf(buff, " %06o", address);
 122         strcat (result, buff);
 123     }
 124     // get mod
 125     strcpy(buff, "");
 126     for(uint n = 0 ; n < 0100 ; n++)
 127         if (extMods[n].mod)
 128             if(n == tag)
 129             {
 130                 strcpy(buff, extMods[n].mod);
 131                 break;
 132             }
 133 
 134     if (strlen(buff))
 135     {
 136         strcat(result, ",");
 137         strcat(result, buff);
 138     }
 139 
 140     return dps8_strupr(result);
 141 }
 142 
 143 /*
 144  * get_mod__string ()
 145  *
 146  * Convert instruction address modifier tag to printable string
 147  * WARNING: returns pointer to statically allocated string
 148  */
 149 
 150 char *get_mod_string(char * msg, word6 tag)
     /*  */
 151 {
 152     strcpy(msg, "none");
 153 
 154     if (tag >= 0100) //-V536
 155     {
 156         sprintf(msg, "getModReg(tag out-of-range %o)", tag);
 157     } else {
 158         for(uint n = 0 ; n < 0100 ; n++) //-V536
 159             if (extMods[n].mod)
 160                 if(n == tag)
 161                 {
 162                     strcpy(msg, extMods[n].mod);
 163                     break;
 164                 }
 165 
 166     }
 167     return msg;
 168 }
 169 
 170 /*
 171  * 36-bit arithmetic stuff ...
 172  */
 173 /* Single word integer routines */
 174 
 175 word36 Add36b (word36 op1, word36 op2, word1 carryin, word18 flagsToSet, word18 * flags, bool * ovf)
     /*  */
 176   {
 177     CPT (cpt2L, 17); // Add36b
 178     sim_debug (DBG_TRACEEXT, & cpu_dev, "Add36b op1 %012"PRIo64" op2 %012"PRIo64" carryin %o flagsToSet %06o flags %06o\n", op1, op2, carryin, flagsToSet, * flags);
 179 
 180 // See: https://en.wikipedia.org/wiki/Two%27s_complement#Addition
 181 
 182     // 37 bit arithmetic for the above N+1 algorithm
 183     word38 op1e = op1 & MASK36;
 184     word38 op2e = op2 & MASK36;
 185     word38 ci   = carryin ? 1 : 0;
 186 
 187     // extend sign bits
 188     if (op1e & SIGN36)
 189       op1e |= BIT37;
 190     if (op2e & SIGN36)
 191       op2e |= BIT37;
 192 
 193     // Do the math
 194     word38 res = op1e + op2e + ci;
 195 
 196     // Extract the overflow bits
 197     bool r37 = res & BIT37 ? true : false;
 198     bool r36 = res & SIGN36 ? true : false;
 199 
 200     // Extract the carry bit
 201     bool r38 = res & BIT38 ? true : false;
 202 
 203     // Check for overflow
 204     * ovf = r37 ^ r36;
 205 
 206     // Check for carry
 207     bool cry = r38;
 208 
 209     // Truncate the result
 210     res &= MASK36;
 211 
 212 #ifdef PANEL68
 213     if (cry) CPT (cpt2L, 28); // carry
 214     if (ovf) CPT (cpt2L, 29); // ovf
 215     if (!res) CPT (cpt2L, 30); // zero
 216     if (res & SIGN36) CPT (cpt2L, 31); // neg
 217 #endif
 218 
 219     if (flagsToSet & I_CARRY)
 220       {
 221         if (cry)
 222           SETF (* flags, I_CARRY);
 223         else
 224           CLRF (* flags, I_CARRY);
 225       }
 226 
 227     if (chkOVF () && (flagsToSet & I_OFLOW))
 228       {
 229         if (* ovf)
 230           SETF (* flags, I_OFLOW);      // overflow
 231       }
 232 
 233     if (flagsToSet & I_ZERO)
 234       {
 235         if (res)
 236           CLRF (* flags, I_ZERO);
 237         else
 238           SETF (* flags, I_ZERO);       // zero result
 239       }
 240 
 241     if (flagsToSet & I_NEG)
 242       {
 243         if (res & SIGN36)
 244           SETF (* flags, I_NEG);
 245         else
 246           CLRF (* flags, I_NEG);
 247       }
 248 
 249     sim_debug (DBG_TRACEEXT, & cpu_dev, "Add36b res %012"PRIo64" flags %06o ovf %o\n", res, * flags, * ovf);
 250     return res;
 251   }
 252 
 253 word36 Sub36b (word36 op1, word36 op2, word1 carryin, word18 flagsToSet, word18 * flags, bool * ovf)
     /*  */
 254   {
 255     CPT (cpt2L, 18); // Sub36b
 256 
 257 // See: https://en.wikipedia.org/wiki/Two%27s_complement
 258 
 259 // AL39:
 260 //
 261 //  If carry indicator ON, then C(A) - C(Y) -> C(A)
 262 //  If carry indicator OFF, then C(A) - C(Y) - 1 -> C(A)
 263 
 264     // 38 bit arithmetic for the above N+1 algorithm
 265     word38 op1e = op1 & MASK36;
 266     word38 op2e = op2 & MASK36;
 267     // Note that carryin has an inverted sense for borrow
 268     word38 ci   = carryin ? 0 : 1;
 269 
 270     // extend sign bits
 271     if (op1e & SIGN36)
 272       op1e |= BIT37;
 273     if (op2e & SIGN36)
 274       op2e |= BIT37;
 275 
 276     // Do the math
 277     // word38 res = op1e - op2e - ci;
 278     // ubsan
 279     word38 res = (word38) (((word38s) op1e) - ((word38s) op2e) - ((word38) ci));
 280 
 281     // Extract the overflow bits
 282     bool r37 = (res & BIT37) ? true : false;
 283     bool r36 = (res & SIGN36) ? true : false;
 284 
 285     // Extract the carry bit
 286     bool r38 = res & BIT38 ? true : false;
 287 
 288     // Truncate the result
 289     res &= MASK36;
 290 
 291     // Check for overflow
 292     * ovf = r37 ^ r36;
 293 
 294     // Check for carry
 295     bool cry = r38;
 296 
 297 #ifdef PANEL68
 298     if (cry) CPT (cpt2L, 28); // carry
 299     if (ovf) CPT (cpt2L, 29); // ovf
 300     if (!res) CPT (cpt2L, 30); // zero
 301     if (res & SIGN36) CPT (cpt2L, 31); // neg
 302 #endif
 303 
 304     if (flagsToSet & I_CARRY)
 305       {
 306         if (cry) // Note inverted logic for subtraction
 307           CLRF (* flags, I_CARRY);
 308         else
 309           SETF (* flags, I_CARRY);
 310       }
 311 
 312     if (chkOVF () && (flagsToSet & I_OFLOW))
 313       {
 314         if (* ovf)
 315           SETF (* flags, I_OFLOW);      // overflow
 316       }
 317 
 318     if (flagsToSet & I_ZERO)
 319       {
 320         if (res)
 321           CLRF (* flags, I_ZERO);
 322         else
 323           SETF (* flags, I_ZERO);       // zero result
 324       }
 325 
 326     if (flagsToSet & I_NEG)
 327       {
 328         if (res & SIGN36)
 329           SETF (* flags, I_NEG);
 330         else
 331           CLRF (* flags, I_NEG);
 332       }
 333 
 334     return res;
 335   }
 336 
 337 word18 Add18b (word18 op1, word18 op2, word1 carryin, word18 flagsToSet, word18 * flags, bool * ovf)
     /*  */
 338   {
 339     CPT (cpt2L, 19); // Add18b
 340 
 341 // See: https://en.wikipedia.org/wiki/Two%27s_complement#Addition
 342 
 343     // 19 bit arithmetic for the above N+1 algorithm
 344     word20 op1e = op1 & MASK18;
 345     word20 op2e = op2 & MASK18;
 346     word20 ci   = carryin ? 1 : 0;
 347 
 348     // extend sign bits
 349     if (op1e & SIGN18)
 350       op1e |= BIT19;
 351     if (op2e & SIGN18)
 352       op2e |= BIT19;
 353 
 354     // Do the math
 355     word20 res = op1e + op2e + ci;
 356 
 357     // Extract the overflow bits
 358     bool r19 = (res & BIT19)  ? true : false;
 359     bool r18 = (res & SIGN18) ? true : false;
 360 
 361     // Extract the carry bit
 362     bool r20 = res & BIT20 ? true : false;
 363 
 364     // Truncate the result
 365     res &= MASK18;
 366 
 367     // Check for overflow
 368     * ovf = r19 ^ r18;
 369 
 370     // Check for carry
 371     bool cry = r20;
 372 
 373 #ifdef PANEL68
 374     if (cry) CPT (cpt2L, 28); // carry
 375     if (ovf) CPT (cpt2L, 29); // ovf
 376     if (!res) CPT (cpt2L, 30); // zero
 377     if (res & SIGN36) CPT (cpt2L, 31); // neg
 378 #endif
 379 
 380     if (flagsToSet & I_CARRY)
 381       {
 382         if (cry)
 383           SETF (* flags, I_CARRY);
 384         else
 385           CLRF (* flags, I_CARRY);
 386       }
 387 
 388     if (chkOVF () && (flagsToSet & I_OFLOW))
 389       {
 390         if (* ovf)
 391           SETF (* flags, I_OFLOW);      // overflow
 392       }
 393 
 394     if (flagsToSet & I_ZERO)
 395       {
 396         if (res)
 397           CLRF (* flags, I_ZERO);
 398         else
 399           SETF (* flags, I_ZERO);       // zero result
 400       }
 401 
 402     if (flagsToSet & I_NEG)
 403       {
 404         if (res & SIGN18)
 405           SETF (* flags, I_NEG);
 406         else
 407           CLRF (* flags, I_NEG);
 408       }
 409 
 410     return (word18) res;
 411   }
 412 
 413 word18 Sub18b (word18 op1, word18 op2, word1 carryin, word18 flagsToSet, word18 * flags, bool * ovf)
     /*  */
 414   {
 415     CPT (cpt2L, 20); // Sub18b
 416 
 417 // See: https://en.wikipedia.org/wiki/Two%27s_complement
 418 
 419 // AL39:
 420 //
 421 //  If carry indicator ON, then C(A) - C(Y) -> C(A)
 422 //  If carry indicator OFF, then C(A) - C(Y) - 1 -> C(A)
 423 
 424     // 19 bit arithmetic for the above N+1 algorithm
 425     word20 op1e = op1 & MASK18;
 426     word20 op2e = op2 & MASK18;
 427     // Note that carryin has an inverted sense for borrow
 428     word20 ci   = carryin ? 0 : 1;
 429 
 430     // extend sign bits
 431     if (op1e & SIGN18)
 432       op1e |= BIT19;
 433     if (op2e & SIGN18)
 434       op2e |= BIT19;
 435 
 436     // Do the math
 437     // word20 res = op1e - op2e - ci;
 438     // ubsan
 439     word20 res = (word20) (((word20s) op1e) - ((word20s) op2e) - ((word20s) ci));
 440 
 441     // Extract the overflow bits
 442     bool r19 = res & BIT19  ? true : false;
 443     bool r18 = res & SIGN18 ? true : false;
 444 
 445     // Extract the carry bit
 446     bool r20 = res & BIT20 ? true : false;
 447 
 448     // Truncate the result
 449     res &= MASK18;
 450 
 451     // Check for overflow
 452     * ovf = r19 ^ r18;
 453 
 454     // Check for carry
 455     bool cry = r20;
 456 
 457 #ifdef PANEL68
 458     if (cry) CPT (cpt2L, 28); // carry
 459     if (ovf) CPT (cpt2L, 29); // ovf
 460     if (!res) CPT (cpt2L, 30); // zero
 461     if (res & SIGN36) CPT (cpt2L, 31); // neg
 462 #endif
 463 
 464     if (flagsToSet & I_CARRY)
 465       {
 466         if (cry) // Note inverted logic for subtraction
 467           CLRF (* flags, I_CARRY);
 468         else
 469           SETF (* flags, I_CARRY);
 470       }
 471 
 472     if (chkOVF () && (flagsToSet & I_OFLOW))
 473       {
 474         if (* ovf)
 475           SETF (* flags, I_OFLOW);      // overflow
 476       }
 477 
 478     if (flagsToSet & I_ZERO)
 479       {
 480         if (res)
 481           CLRF (* flags, I_ZERO);
 482         else
 483           SETF (* flags, I_ZERO);       // zero result
 484       }
 485 
 486     if (flagsToSet & I_NEG)
 487       {
 488         if (res & SIGN18)
 489           SETF (* flags, I_NEG);
 490         else
 491           CLRF (* flags, I_NEG);
 492       }
 493 
 494     return res;
 495   }
 496 
 497 word72 Add72b (word72 op1, word72 op2, word1 carryin, word18 flagsToSet, word18 * flags, bool * ovf)
     /*  */
 498   {
 499     CPT (cpt2L, 21); // Add72b
 500 
 501 // See: https://en.wikipedia.org/wiki/Two%27s_complement#Addition
 502 
 503     // 73 bit arithmetic for the above N+1 algorithm
 504 #ifdef NEED_128
 505     word74 op1e = and_128 (op1, MASK72);
 506     word74 op2e = and_128 (op2, MASK72);
 507     word74 ci   = construct_128 (0, carryin ? 1 : 0);
 508 #else
 509     word74 op1e = op1 & MASK72;
 510     word74 op2e = op2 & MASK72;
 511     word74 ci   = carryin ? 1 : 0;
 512 #endif
 513 
 514     // extend sign bits
 515 #ifdef NEED_128
 516     if (isnonzero_128 (and_128 (op1e, SIGN72)))
 517       op1e = or_128 (op1e, BIT73);
 518     if (isnonzero_128 (and_128 (op2e, SIGN72)))
 519       op2e = or_128 (op2e, BIT73);
 520 #else
 521     if (op1e & SIGN72)
 522       op1e |= BIT73;
 523     if (op2e & SIGN72)
 524       op2e |= BIT73;
 525 #endif
 526 
 527     // Do the math
 528 #ifdef NEED_128
 529     word74 res = add_128 (op1e, add_128 (op2e, ci));
 530 #else
 531     word74 res = op1e + op2e + ci;
 532 #endif
 533 
 534     // Extract the overflow bits
 535 #ifdef NEED_128
 536     bool r73 = isnonzero_128 (and_128 (res, BIT73));
 537     bool r72 = isnonzero_128 (and_128 (res, SIGN72));
 538 #else
 539     bool r73 = res & BIT73  ? true : false;
 540     bool r72 = res & SIGN72 ? true : false;
 541 #endif
 542 
 543     // Extract the carry bit
 544 #ifdef NEED_128
 545     bool r74 = isnonzero_128 (and_128 (res, BIT74));
 546 #else
 547     bool r74 = res & BIT74 ? true : false;
 548 #endif
 549 
 550     // Truncate the result
 551 #ifdef NEED_128
 552     res = and_128 (res, MASK72);
 553 #else
 554     res &= MASK72;
 555 #endif
 556 
 557     // Check for overflow
 558     * ovf = r73 ^ r72;
 559 
 560     // Check for carry
 561     bool cry = r74;
 562 
 563 #ifdef PANEL68
 564     if (cry) CPT (cpt2L, 28); // carry
 565     if (ovf) CPT (cpt2L, 29); // ovf
 566     if (!res) CPT (cpt2L, 30); // zero
 567     if (res & SIGN36) CPT (cpt2L, 31); // neg
 568 #endif
 569 
 570     if (flagsToSet & I_CARRY)
 571       {
 572         if (cry)
 573           SETF (* flags, I_CARRY);
 574         else
 575           CLRF (* flags, I_CARRY);
 576       }
 577 
 578     if (chkOVF () && (flagsToSet & I_OFLOW))
 579       {
 580         if (* ovf)
 581           SETF (* flags, I_OFLOW);      // overflow
 582       }
 583 
 584     if (flagsToSet & I_ZERO)
 585       {
 586 #ifdef NEED_128
 587         if (isnonzero_128 (res))
 588 #else
 589         if (res)
 590 #endif
 591           CLRF (* flags, I_ZERO);
 592         else
 593           SETF (* flags, I_ZERO);       // zero result
 594       }
 595 
 596     if (flagsToSet & I_NEG)
 597       {
 598 #ifdef NEED_128
 599         if (isnonzero_128 (and_128 (res, SIGN72)))
 600 #else
 601         if (res & SIGN72)
 602 #endif
 603           SETF (* flags, I_NEG);
 604         else
 605           CLRF (* flags, I_NEG);
 606       }
 607 
 608     return res;
 609   }
 610 
 611 word72 Sub72b (word72 op1, word72 op2, word1 carryin, word18 flagsToSet, word18 * flags, bool * ovf)
     /*  */
 612   {
 613     CPT (cpt2L, 22); // Sub72b
 614 #ifdef NEED_128
 615     sim_debug (DBG_TRACEEXT, & cpu_dev, "Sub72b op1 %012"PRIo64"%012"PRIo64" op2 %012"PRIo64"%012"PRIo64" carryin %o flagsToSet %06o flags %06o\n",
 616  (word36) ((rshift_128 (op1, 36).l) & MASK36), (word36) (op1.l & MASK36), (word36) (rshift_128 (op2, 36).l & MASK36), (word36) (op2.l & MASK36), carryin, flagsToSet, * flags);
 617 #else
 618     sim_debug (DBG_TRACEEXT, & cpu_dev, "Sub72b op1 %012"PRIo64"%012"PRIo64" op2 %012"PRIo64"%012"PRIo64" carryin %o flagsToSet %06o flags %06o\n",
 619  (word36) ((op1 >> 36) & MASK36), (word36) (op1 & MASK36), (word36) ((op2 >> 36) & MASK36), (word36) (op2 & MASK36), carryin, flagsToSet, * flags);
 620 #endif
 621 
 622 // See: https://en.wikipedia.org/wiki/Two%27s_complement
 623 
 624 // AL39:
 625 //
 626 //  If carry indicator ON, then C(A) - C(Y) -> C(A)
 627 //  If carry indicator OFF, then C(A) - C(Y) - 1 -> C(A)
 628 
 629     // 73 bit arithmetic for the above N+1 algorithm
 630 #ifdef NEED_128
 631     word74 op1e = and_128 (op1, MASK72);
 632     word74 op2e = and_128 (op2, MASK72);
 633 #else
 634     word74 op1e = op1 & MASK72;
 635     word74 op2e = op2 & MASK72;
 636 #endif
 637     // Note that carryin has an inverted sense for borrow
 638 #ifdef NEED_128
 639     word74 ci = construct_128 (0, carryin ? 0 : 1);
 640 #else
 641     word74 ci = carryin ? 0 : 1;
 642 #endif
 643 
 644     // extend sign bits
 645 #ifdef NEED_128
 646     if (isnonzero_128 (and_128 (op1e, SIGN72)))
 647       op1e = or_128 (op1e, BIT73);
 648     if (isnonzero_128 (and_128 (op2e, SIGN72)))
 649       op2e = or_128 (op2e, BIT73);
 650 #else
 651     if (op1e & SIGN72)
 652       op1e |= BIT73;
 653     if (op2e & SIGN72)
 654       op2e |= BIT73;
 655 #endif
 656 
 657     // Do the math
 658 #ifdef NEED_128
 659     sim_debug (DBG_TRACEEXT, & cpu_dev, "Sub72b op1e %012"PRIo64"%012"PRIo64" op2e %012"PRIo64"%012"PRIo64" carryin %o flagsToSet %06o flags %06o\n",
 660  (word36) ((rshift_128 (op1e, 36).l) & MASK36), (word36) (op1e.l & MASK36), (word36) (rshift_128 (op2e, 36).l & MASK36), (word36) (op2e.l & MASK36), carryin, flagsToSet, * flags);
 661 #else
 662     sim_debug (DBG_TRACEEXT, & cpu_dev, "Sub72b op1e %012"PRIo64"%012"PRIo64" op2e %012"PRIo64"%012"PRIo64" carryin %o flagsToSet %06o flags %06o\n",
 663  (word36) ((op1e >> 36) & MASK36), (word36) (op1e & MASK36), (word36) ((op2e >> 36) & MASK36), (word36) (op2e & MASK36), carryin, flagsToSet, * flags);
 664 #endif
 665 #ifdef NEED_128
 666     word74 res = subtract_128 (subtract_128 (op1e, op2e), ci);
 667 #else
 668     // word74 res = op1e - op2e - ci;
 669     // ubsan
 670     word74 res = (word72) (((word72s) op1e) - ((word72s) op2e) - ((word72s) ci));
 671 #endif
 672 #ifdef NEED_128
 673     sim_debug (DBG_TRACEEXT, & cpu_dev, "Sub72b res %012"PRIo64"%012"PRIo64" flags %06o ovf %o\n", (word36) (rshift_128 (res, 36).l & MASK36), (word36) (res.l & MASK36), * flags, * ovf);
 674 #else
 675     sim_debug (DBG_TRACEEXT, & cpu_dev, "Sub72b res %012"PRIo64"%012"PRIo64" flags %06o ovf %o\n", (word36) ((res >> 36) & MASK36), (word36) (res & MASK36), * flags, * ovf);
 676 #endif
 677 
 678     // Extract the overflow bits
 679 #ifdef NEED_128
 680     bool r73 = isnonzero_128 (and_128 (res, BIT73));
 681     bool r72 = isnonzero_128 (and_128 (res, SIGN72));
 682 #else
 683     bool r73 = res & BIT73  ? true : false;
 684     bool r72 = res & SIGN72 ? true : false;
 685 #endif
 686 
 687     // Extract the carry bit
 688 #ifdef NEED_128
 689     bool r74 = isnonzero_128 (and_128 (res, BIT74));
 690 #else
 691     bool r74 = res & BIT74 ? true : false;
 692 #endif
 693 
 694     // Truncate the result
 695 #ifdef NEED_128
 696     res = and_128 (res, MASK72);
 697 #else
 698     res &= MASK72;
 699 #endif
 700 
 701     // Check for overflow
 702     * ovf = r73 ^ r72;
 703 
 704     // Check for carry
 705     bool cry = r74;
 706 
 707 #ifdef PANEL68
 708     if (cry) CPT (cpt2L, 28); // carry
 709     if (ovf) CPT (cpt2L, 29); // ovf
 710     if (!res) CPT (cpt2L, 30); // zero
 711     if (res & SIGN36) CPT (cpt2L, 31); // neg
 712 #endif
 713 
 714     if (flagsToSet & I_CARRY)
 715       {
 716         if (cry) // Note inverted logic for subtraction
 717           CLRF (* flags, I_CARRY);
 718         else
 719           SETF (* flags, I_CARRY);
 720       }
 721 
 722     if (chkOVF () && (flagsToSet & I_OFLOW))
 723       {
 724         if (* ovf)
 725           SETF (* flags, I_OFLOW);      // overflow
 726       }
 727 
 728     if (flagsToSet & I_ZERO)
 729       {
 730 #ifdef NEED_128
 731         if (isnonzero_128 (res))
 732 #else
 733         if (res)
 734 #endif
 735           CLRF (* flags, I_ZERO);
 736         else
 737           SETF (* flags, I_ZERO);       // zero result
 738       }
 739 
 740     if (flagsToSet & I_NEG)
 741       {
 742 #ifdef NEED_128
 743         if (isnonzero_128 (and_128 (res, SIGN72)))
 744 #else
 745         if (res & SIGN72)
 746 #endif
 747           SETF (* flags, I_NEG);
 748         else
 749           CLRF (* flags, I_NEG);
 750       }
 751 
 752 #ifdef NEED_128
 753     sim_debug (DBG_TRACEEXT, & cpu_dev, "Sub72b res %012"PRIo64"%012"PRIo64" flags %06o ovf %o\n", (word36) (rshift_128 (res, 36).l & MASK36), (word36) (res.l & MASK36), * flags, * ovf);
 754 #else
 755     sim_debug (DBG_TRACEEXT, & cpu_dev, "Sub72b res %012"PRIo64"%012"PRIo64" flags %06o ovf %o\n", (word36) ((res >> 36) & MASK36), (word36) (res & MASK36), * flags, * ovf);
 756 #endif
 757     return res;
 758   }
 759 
 760 // CANFAULT
 761 word36 compl36(word36 op1, word18 *flags, bool * ovf)
     /*  */
 762 {
 763     CPT (cpt2L, 23); // compl36
 764     //printf("op1 = %"PRIo64" %"PRIo64"\n", op1, (-op1) & DMASK);
 765 
 766     op1 &= DMASK;
 767 
 768     // word36 res = -op1 & DMASK;
 769     // ubsan
 770     word36 res = ((word36) (- ((word36s) op1))) & DMASK;
 771 
 772     * ovf = op1 == MAXNEG;
 773 
 774 #ifdef PANEL68
 775     if (* ovf) CPT (cpt2L, 29); // ovf
 776     if (!res) CPT (cpt2L, 30); // zero
 777     if (res & SIGN36) CPT (cpt2L, 31); // neg
 778 #endif
 779 
 780     if (chkOVF () && * ovf)
 781         SETF(*flags, I_OFLOW);
 782 
 783     if (res & SIGN36)
 784         SETF(*flags, I_NEG);
 785     else
 786         CLRF(*flags, I_NEG);
 787 
 788     if (res == 0)
 789         SETF(*flags, I_ZERO);
 790     else
 791         CLRF(*flags, I_ZERO);
 792 
 793     return res;
 794 }
 795 
 796 // CANFAULT
 797 word18 compl18(word18 op1, word18 *flags, bool * ovf)
     /*  */
 798 {
 799     CPT (cpt2L, 24); // compl18
 800     //printf("op1 = %"PRIo64" %"PRIo64"\n", op1, (-op1) & DMASK);
 801 
 802     op1 &= MASK18;
 803 
 804     // word18 res = -op1 & MASK18;
 805     // ubsan
 806     word18 res = ((word18) (- (word18s) op1)) & MASK18;
 807 
 808     * ovf = op1 == MAX18NEG;
 809 #ifdef PANEL68
 810     if (* ovf) CPT (cpt2L, 29); // ovf
 811     if (!res) CPT (cpt2L, 30); // zero
 812     if (res & SIGN18) CPT (cpt2L, 31); // neg
 813 #endif
 814 
 815     if (chkOVF () && * ovf)
 816         SETF(*flags, I_OFLOW);
 817     if (res & SIGN18)
 818         SETF(*flags, I_NEG);
 819     else
 820         CLRF(*flags, I_NEG);
 821 
 822     if (res == 0)
 823         SETF(*flags, I_ZERO);
 824     else
 825         CLRF(*flags, I_ZERO);
 826 
 827     return res;
 828 }
 829 
 830 void copyBytes(int posn, word36 src, word36 *dst)
     /*  */
 831 {
 832     word36 mask = 0;
 833 
 834     if (posn & 8) // bit 30 - byte 0 - (bits 0-8)
 835         mask |= 0777000000000LL;
 836 
 837     if (posn & 4) // bit 31 - byte 1 - (bits 9-17)
 838         mask |= 0000777000000LL;
 839 
 840     if (posn & 2) // bit 32 - byte 2 - (bits 18-26)
 841         mask |= 0000000777000LL;
 842 
 843     if (posn & 1) // bit 33 - byte 3 - (bits 27-35)
 844         mask |= 0000000000777LL;
 845 
 846     word36 byteVals = src & mask;   // get byte bits
 847 
 848     // clear the bits in dst
 849     *dst &= ~mask;
 850 
 851     // and set the bits in dst
 852     *dst |= byteVals;
 853 }
 854 
 855 void copyChars(int posn, word36 src, word36 *dst)
     /*  */
 856 {
 857     word36 mask = 0;
 858 
 859     if (posn & 32) // bit 30 - char 0 - (bits 0-5)
 860         mask |= 0770000000000LL;
 861 
 862     if (posn & 16) // bit 31 - char 1 - (bits 6-11)
 863         mask |= 0007700000000LL;
 864 
 865     if (posn & 8) // bit 32 - char 2 - (bits 12-17)
 866         mask |= 0000077000000LL;
 867 
 868     if (posn & 4) // bit 33 - char 3 - (bits 18-23)
 869         mask |= 0000000770000LL;
 870 
 871     if (posn & 2) // bit 34 - char 4 - (bits 24-29)
 872         mask |= 0000000007700LL;
 873 
 874     if (posn & 1) // bit 35 - char 5 - (bits 30-35)
 875         mask |= 0000000000077LL;
 876 
 877     word36 byteVals = src & mask;   // get byte bits
 878 
 879     // clear the bits in dst
 880     *dst &= ~mask;
 881 
 882     // and set the bits in dst
 883     *dst |= byteVals;
 884 }
 885 
 886 /*!
 887  * write 9-bit byte into 36-bit word....
 888  */
 889 void putByte(word36 *dst, word9 data, int posn)
     /*  */
 890 {
 891     // XXX which is faster switch() or calculation?
 892 
 893 //    int offset = 27 - (9 * posn);//    0;
 894 //    switch (posn)
 895 //    {
 896 //        case 0:
 897 //            offset = 27;
 898 //            break;
 899 //        case 1:
 900 //            offset = 18;
 901 //            break;
 902 //        case 2:
 903 //            offset = 9;
 904 //            break;
 905 //        case 3:
 906 //            offset = 0;
 907 //            break;
 908 //    }
 909     putbits36_9 (dst, (uint) posn * 9, data);
 910 }
 911 
 912 void putChar(word36 *dst, word6 data, int posn)
     /*  */
 913 {
 914     // XXX which is faster switch() or calculation?
 915 
 916 //    int offset = 30 - (6 * posn);   //0;
 917 //    switch (posn)
 918 //    {
 919 //        case 0:
 920 //            offset = 30;
 921 //            break;
 922 //        case 1:
 923 //            offset = 24;
 924 //            break;
 925 //        case 2:
 926 //            offset = 18;
 927 //            break;
 928 //        case 3:
 929 //            offset = 12;
 930 //            break;
 931 //        case 4:
 932 //            offset = 6;
 933 //            break;
 934 //        case 5:
 935 //            offset = 0;
 936 //            break;
 937 //    }
 938     putbits36_6 (dst, (uint) posn * 6, data);
 939 }
 940 
 941 word72 convert_to_word72(word36 even, word36 odd)
     /*  */
 942 {
 943 #ifdef NEED_128
 944     return or_128 (lshift_128 (construct_128 (0, even), 36), construct_128 (0, odd));
 945 #else
 946     return ((word72)even << 36) | (word72)odd;
 947 #endif
 948 }
 949 
 950 void convert_to_word36 (word72 src, word36 *even, word36 *odd)
     /*  */
 951 {
 952 #ifdef NEED_128
 953     *even = rshift_128 (src, 36).l & DMASK;
 954     *odd  = src.l & DMASK;
 955 #else
 956     *even = (word36)(src >> 36) & DMASK;
 957     *odd  = (word36)src & DMASK;
 958 #endif
 959 }
 960 
 961 void cmp36(word36 oP1, word36 oP2, word18 *flags)
     /*  */
 962   {
 963     CPT (cpt2L, 25); // cmp36
 964     L68_ (cpu.ou.cycle |= ou_GOS;)
 965     t_int64 op1 = SIGNEXT36_64(oP1 & DMASK);
 966     t_int64 op2 = SIGNEXT36_64(oP2 & DMASK);
 967 
 968     word36 sign1 = (word36) op1 & SIGN36;
 969     word36 sign2 = (word36) op2 & SIGN36;
 970 
 971     if ((! sign1) && sign2)  // op1 > 0, op2 < 0 :: op1 > op2
 972       CLRF (* flags, I_ZERO | I_NEG | I_CARRY);
 973 
 974     else if (sign1 == sign2) // both operands have the same sign
 975       {
 976          if (op1 > op2)
 977            {
 978              CPT (cpt2L, 28); // carry
 979              SETF (* flags, I_CARRY);
 980              CLRF (* flags, I_ZERO | I_NEG);
 981            }
 982          else if (op1 == op2)
 983            {
 984              CPT (cpt2L, 28); // carry
 985              CPT (cpt2L, 30); // zero
 986              SETF (* flags, I_ZERO | I_CARRY);
 987              CLRF (* flags, I_NEG);
 988            }
 989          else //  op1 < op2
 990           {
 991             CPT (cpt2L, 31); // neg
 992             SETF (* flags, I_NEG);
 993             CLRF (* flags, I_ZERO | I_CARRY);
 994           }
 995       }
 996     else // op1 < 0, op2 > 0 :: op1 < op2
 997       {
 998         CPT  (cpt2L, 28); // carry
 999         CPT  (cpt2L, 31); // neg
1000         SETF (* flags, I_CARRY | I_NEG);
1001         CLRF (* flags, I_ZERO);
1002       }
1003   }
1004 
1005 void cmp18(word18 oP1, word18 oP2, word18 *flags)
     /*  */
1006   {
1007     CPT (cpt2L, 26); // cmp18
1008     L68_ (cpu.ou.cycle |= ou_GOS;)
1009     int32 op1 = SIGNEXT18_32 (oP1 & MASK18);
1010     int32 op2 = SIGNEXT18_32 (oP2 & MASK18);
1011 
1012     word18 sign1 = (word18) op1 & SIGN18;
1013     word18 sign2 = (word18) op2 & SIGN18;
1014 
1015     if ((! sign1) && sign2)  // op1 > 0, op2 < 0 :: op1 > op2
1016       CLRF (* flags, I_ZERO | I_NEG | I_CARRY);
1017 
1018     else if (sign1 == sign2) // both operands have the same sign
1019       {
1020         if (op1 > op2)
1021           {
1022             CPT (cpt2L, 28); // carry
1023             SETF (* flags, I_CARRY);
1024             CLRF (* flags, I_ZERO | I_NEG);
1025           }
1026         else if (op1 == op2)
1027           {
1028             CPT (cpt2L, 28); // carry
1029             CPT (cpt2L, 30); // zero
1030             SETF (* flags, I_ZERO | I_CARRY);
1031             CLRF (* flags, I_NEG);
1032           }
1033         else //  op1 < op2
1034           {
1035             CPT (cpt2L, 31); // neg
1036             SETF (* flags, I_NEG);
1037             CLRF (* flags, I_ZERO | I_CARRY);
1038           }
1039       }
1040     else // op1 < 0, op2 > 0 :: op1 < op2
1041       {
1042         CPT (cpt2L, 28); // carry
1043         CPT (cpt2L, 31); // neg
1044         SETF (* flags, I_CARRY | I_NEG);
1045         CLRF (* flags, I_ZERO);
1046       }
1047   }
1048 
1049 void cmp36wl(word36 A, word36 Y, word36 Q, word18 *flags)
     /*  */
1050 {
1051     CPT (cpt2L, 26); // cmp36wl
1052     // This is wrong; signed math is needed.
1053 
1054     //bool Z = (A <= Y && Y <= Q) || (A >= Y && Y >= Q);
1055 
1056     L68_ (cpu.ou.cycle |= ou_GOS;)
1057     t_int64 As = (word36s) SIGNEXT36_64(A & DMASK);
1058     t_int64 Ys = (word36s) SIGNEXT36_64(Y & DMASK);
1059     t_int64 Qs = (word36s) SIGNEXT36_64(Q & DMASK);
1060     bool Z = (As <= Ys && Ys <= Qs) || (As >= Ys && Ys >= Qs);
1061 
1062     SCF(Z, *flags, I_ZERO);
1063 
1064     if (!(Q & SIGN36) && (Y & SIGN36) && (Qs > Ys))
1065         CLRF(*flags, I_NEG | I_CARRY);
1066     else if (((Q & SIGN36) == (Y & SIGN36)) && (Qs >= Ys))
1067     {
1068         CPT (cpt2L, 28); // carry
1069         SETF(*flags, I_CARRY);
1070         CLRF(*flags, I_NEG);
1071     } else if (((Q & SIGN36) == (Y & SIGN36)) && (Qs < Ys))
1072     {
1073         CPT (cpt2L, 31); // neg
1074         CLRF(*flags, I_CARRY);
1075         SETF(*flags, I_NEG);
1076     } else if ((Q & SIGN36) && !(Y & SIGN36) && (Qs < Ys))
1077     {
1078         CPT (cpt2L, 28); // carry
1079         CPT (cpt2L, 31); // neg
1080         SETF(*flags, I_NEG | I_CARRY);
1081     }
1082 }
1083 
1084 void cmp72(word72 op1, word72 op2, word18 *flags)
     /*  */
1085 {
1086     CPT (cpt2L, 27); // cmp72
1087    // The case of op1 == 400000000000000000000000 and op2 == 0 falls through
1088    // this code.
1089     L68_ (cpu.ou.cycle |= ou_GOS;)
1090 #ifdef NEED_128
1091 sim_debug (DBG_TRACEEXT, & cpu_dev, "op1 %016"PRIx64"%016"PRIx64"\n", op1.h, op1.l);
1092 sim_debug (DBG_TRACEEXT, & cpu_dev, "op2 %016"PRIx64"%016"PRIx64"\n", op2.h, op2.l);
1093     int128 op1s =  SIGNEXT72_128 (and_128 (op1, MASK72));
1094     int128 op2s =  SIGNEXT72_128 (and_128 (op2, MASK72));
1095 sim_debug (DBG_TRACEEXT, & cpu_dev, "op1s %016"PRIx64"%016"PRIx64"\n", op1s.h, op1s.l);
1096 sim_debug (DBG_TRACEEXT, & cpu_dev, "op2s %016"PRIx64"%016"PRIx64"\n", op2s.h, op2s.l);
1097 #else
1098 sim_debug (DBG_TRACEEXT, & cpu_dev, "op1 %016"PRIx64"%016"PRIx64"\n", (uint64_t) (op1>>64), (uint64_t) op1);
1099 sim_debug (DBG_TRACEEXT, & cpu_dev, "op2 %016"PRIx64"%016"PRIx64"\n", (uint64_t) (op2>>64), (uint64_t) op2);
1100     int128 op1s =  SIGNEXT72_128 (op1 & MASK72);
1101     int128 op2s =  SIGNEXT72_128 (op2 & MASK72);
1102 sim_debug (DBG_TRACEEXT, & cpu_dev, "op1s %016"PRIx64"%016"PRIx64"\n", (uint64_t) (op1s>>64), (uint64_t) op1s);
1103 sim_debug (DBG_TRACEEXT, & cpu_dev, "op2s %016"PRIx64"%016"PRIx64"\n", (uint64_t) (op2s>>64), (uint64_t) op2s);
1104 #endif
1105 #ifdef NEED_128
1106     if (isgt_s128 (op1s, op2s))
1107 #else
1108     if (op1s > op2s)
1109 #endif
1110       {
1111 #ifdef NEED_128
1112         if (isnonzero_128 (and_128 (op2, SIGN72)))
1113 #else
1114         if (op2 & SIGN72)
1115 #endif
1116           CLRF (* flags, I_CARRY);
1117         else
1118           {
1119             CPT (cpt2L, 28); // carry
1120             SETF (* flags, I_CARRY);
1121           }
1122         CLRF (* flags, I_ZERO | I_NEG);
1123       }
1124 #ifdef NEED_128
1125     else if (iseq_128 (cast_128 (op1s), cast_128 (op2s)))
1126 #else
1127     else if (op1s == op2s)
1128 #endif
1129       {
1130         CPT (cpt2L, 28); // carry
1131         CPT (cpt2L, 30); // zero
1132         SETF (* flags, I_CARRY | I_ZERO);
1133         CLRF (* flags, I_NEG);
1134       }
1135     else /* op1s < op2s */
1136       {
1137         CPT (cpt2L, 31); // neg
1138 #ifdef NEED_128
1139         if (isnonzero_128 (and_128 (op1, SIGN72)))
1140 #else
1141         if (op1 & SIGN72)
1142 #endif
1143           {
1144             CPT (cpt2L, 28); // carry
1145             SETF (* flags, I_CARRY);
1146           }
1147         else
1148           CLRF (* flags, I_CARRY);
1149         CLRF (* flags, I_ZERO);
1150         SETF (* flags, I_NEG);
1151       }
1152 }
1153 
1154 /*
1155  * String utilities ...
1156  */
1157 
1158 char * strlower(char *q)
     /*  */
1159 {
1160         char *s = q;
1161 
1162         while (*s) {
1163                 if (isupper((unsigned char)*s))
1164                         *s = (char) tolower(*s);
1165                 s++;
1166         }
1167         return q;
1168 }
1169 
1170 /*  state definitions  */
1171 #define STAR    0
1172 #define NOTSTAR 1
1173 #define RESET   2
1174 
1175 int strmask (char * str, char * mask)
     /*  */
1176 /*!
1177  Tests string 'str' against mask string 'mask'
1178  Returns TRUE if the string matches the mask.
1179 
1180  The mask can contain '?' and '*' wild card characters.
1181  '?' matches any        single character.
1182  '*' matches any number of any characters.
1183 
1184  For example:
1185  strmask("Hello", "Hello");     ---> TRUE
1186  strmask("Hello", "Jello");     ---> FALSE
1187  strmask("Hello", "H*o");       ---> TRUE
1188  strmask("Hello", "H*g");       ---> FALSE
1189  strmask("Hello", "?ello");     ---> TRUE
1190  strmask("Hello", "H????");     ---> TRUE
1191  strmask("H", "H????");         ---> FALSE
1192  */
1193   {
1194     char * sp, * mp, * reset_string, * reset_mask, * sn;
1195     int state;
1196 
1197     sp = str;
1198     mp = mask;
1199 
1200     while (1)
1201       {
1202         switch (* mp)
1203           {
1204             case '\0':
1205               return * sp ? false : true;
1206 
1207             case '?':
1208               sp ++;
1209               mp ++;
1210               break;
1211 
1212             default:
1213               if (* mp == * sp)
1214                 {
1215                   sp ++;
1216                   mp ++;
1217                   break;
1218                 }
1219               else
1220                 {
1221                   return false;
1222                 }
1223 
1224             case '*':
1225               if (* (mp + 1) == '\0')
1226                 {
1227                   return true;
1228                 }
1229               if ((sn = strchr (sp, * (mp + 1))) == NULL)
1230                 {
1231                   return false;
1232                 }
1233 
1234               /* save place -- match rest of string */
1235               /* if fail, reset to here */
1236               reset_mask = mp;
1237               reset_string = sn + 1;
1238 
1239               mp = mp + 2;
1240               sp = sn + 1;
1241               state = NOTSTAR;
1242               while (state == NOTSTAR)
1243                 {
1244                   switch (* mp)
1245                     {
1246                       case '\0':
1247                         if (* sp == '\0')
1248                           return false;
1249                         else
1250                           state = RESET;
1251                         break;
1252                       case '?':
1253                         sp ++;
1254                         mp ++;
1255                         break;
1256                       default:
1257                         if (* mp == * sp)
1258                           {
1259                             sp ++;
1260                             mp ++;
1261                           }
1262                         else
1263                           state = RESET;
1264                         break;
1265                       case '*':
1266                         state = STAR;
1267                         break;
1268                     }
1269                 } // while STATE == NOTSTAR
1270               /* we've reach a new star or should reset to last star */
1271               if (state == RESET)
1272                 {
1273                   sp = reset_string;
1274                   mp = reset_mask;
1275                 }
1276               break;
1277           } // switch (* mp)
1278       } // while (1)
1279     /*NOTREACHED*/ /* unreachable */
1280     return false;
1281   }
1282 
1283 
1284 
1285 
1286 
1287 
1288 
1289 
1290 
1291 
1292 
1293 
1294 
1295 
1296 
1297 
1298 
1299 
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1331 
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1336 
1337 
1338 
1339 
1340 
1341 
1342 
1343 
1344 
1345 
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1347 
1348 
1349 
1350 
1351 
1352 
1353 
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1355 
1356 
1357 
1358 
1359 
1360 
1361 
1362 
1363 
1364 
1365 
1366 
1367 
1368 
1369 
1370 
1371 
1372 
1373 
1374 
1375 
1376 
1377 
1378 
1379 
1380 /*
1381  * Removes the trailing spaces from a string.
1382  */
1383 char *rtrim(char *s)
     /*  */
1384 {
1385     if (! s)
1386       return s;
1387     int index;
1388 
1389     //for (index = (int)strlen(s) - 1; index >= 0 && (s[index] == ' ' || s[index] == '\t'); index--)
1390     for (index = (int)strlen(s) - 1; index >= 0 && isspace((unsigned char)s[index]); index--)
1391     {
1392         s[index] = '\0';
1393     }
1394     return(s);
1395 }
1396 
1397 char *ltrim(char *s)
     /*  */
1398 /*
1399  * Removes the leading spaces from a string.
1400  */
1401 {
1402     char *p;
1403     if (s == NULL)
1404         return NULL;
1405 
1406     //for (p = s; (*p == ' ' || *p == '\t') && *p != '\0'; p++)
1407     for (p = s; isspace((unsigned char)*p) && *p != '\0'; p++)
1408         ;
1409 
1410     //strcpy(s, p);
1411     memmove(s, p, strlen(p) + 1);
1412     return(s);
1413 }
1414 
1415 char *trim(char *s)
     /*  */
1416 {
1417     return ltrim(rtrim(s));
1418 }
1419 
1420 char *
1421 stripquotes(char *s)
     /*  */
1422 {
1423     if (! s || ! *s)
1424         return s;
1425     /*
1426      char *p;
1427 
1428      while ((p = strchr(s, '"')))
1429      *p = ' ';
1430      strchop(s);
1431 
1432      return s;
1433      */
1434     int nLast = (int)strlen(s) - 1;
1435     // trim away leading/trailing "'s
1436     if (s[0] == '"')
1437         s[0] = ' ';
1438     if (s[nLast] == '"')
1439         s[nLast] = ' ';
1440     return trim(s);
1441 }
1442 
1443 #include <ctype.h>
1444 
1445 // XXX what about config=addr7=123, where clist has a "addr%"?
1446 
1447 // return -2: error; -1: done; >= 0 option found
1448 int cfg_parse (const char * tag, const char * cptr, config_list_t * clist, config_state_t * state, int64_t * result)
     /*  */
1449   {
1450     if (! cptr)
1451       return -2;
1452     char * start = NULL;
1453     if (! state -> copy)
1454       {
1455         state -> copy            = strdup (cptr);
1456         if (! state->copy)
1457           {
1458             fprintf (stderr, "\rFATAL: Out of memory! Aborting at %s[%s:%d]\r\n",
1459                      __func__, __FILE__, __LINE__);
1460 #if defined(USE_BACKTRACE)
1461 # ifdef SIGUSR2
1462             (void)raise(SIGUSR2);
1463             /*NOTREACHED*/ /* unreachable */
1464 # endif /* ifdef SIGUSR2 */
1465 #endif /* if defined(USE_BACKTRACE) */
1466             abort();
1467           }
1468         start                    = state -> copy;
1469         state ->  statement_save = NULL;
1470       }
1471 
1472     int ret = -2; // error
1473 
1474     // grab every thing up to the next semicolon
1475     char * statement;
1476     statement = strtok_r (start, ";", & state -> statement_save);
1477     start = NULL;
1478     if (! statement)
1479       {
1480         ret = -1; // done
1481         goto done;
1482       }
1483 
1484     // extract name
1485     char * name_start = statement;
1486     char * name_save  = NULL;
1487     char * name;
1488     name = strtok_r (name_start, "=", & name_save);
1489     if (! name)
1490       {
1491         sim_printf ("error: %s: can't parse name\n", tag);
1492         goto done;
1493       }
1494 
1495     // lookup name
1496     config_list_t * p = clist;
1497     while (p -> name)
1498       {
1499         if (strcasecmp (name, p -> name) == 0)
1500           break;
1501         p ++;
1502       }
1503     if (! p -> name)
1504       {
1505         sim_printf ("error: %s: don't know name <%s>\n", tag, name);
1506         goto done;
1507       }
1508 
1509     // extract value
1510     char * value;
1511     value = strtok_r (NULL, "", & name_save);
1512     if (! value)
1513       {
1514         // Special case; min>max and no value list
1515         // means that a missing value is ok
1516         if (p -> min > p -> max && ! p -> value_list)
1517           {
1518             return (int) (p - clist);
1519           }
1520         sim_printf ("error: %s: can't parse value\n", tag);
1521         goto done;
1522       }
1523 
1524     // first look to value in the value list
1525     config_value_list_t * v = p -> value_list;
1526     if (v)
1527       {
1528         while (v -> value_name)
1529           {
1530             if (strcasecmp (value, v -> value_name) == 0)
1531               break;
1532             v ++;
1533           }
1534 
1535         // Hit?
1536         if (v -> value_name)
1537           {
1538             * result = v -> value;
1539             return (int) (p - clist);
1540           }
1541       }
1542 
1543     // Must be a number
1544     if (p -> min > p -> max)
1545       {
1546         sim_printf ("error: %s: can't parse value\n", tag);
1547         goto done;
1548       }
1549 
1550     if (strlen (value) == 0)
1551       {
1552          sim_printf ("error: %s: missing value\n", tag);
1553          goto done;
1554       }
1555     char * endptr;
1556     int64_t n = strtoll (value, & endptr, 0);
1557     if (* endptr)
1558       {
1559         sim_printf ("error: %s: can't parse value\n", tag);
1560         goto done;
1561       }
1562 
1563 // XXX small bug; doesn't check for junk after number...
1564     if (n < p -> min || n > p -> max)
1565       {
1566         sim_printf ("error: %s: value out of range\n", tag);
1567         goto done;
1568       }
1569 
1570     * result = n;
1571     return (int) (p - clist);
1572 
1573 done:
1574     FREE (state -> copy);
1575     state -> copy = NULL;
1576     return ret;
1577   }
1578 
1579 void cfg_parse_done (config_state_t * state)
     /*  */
1580   {
1581     if (state -> copy)
1582       FREE (state -> copy);
1583     state -> copy = NULL;
1584   }
1585 
1586 // strdup with limited C-style escape processing
1587 //
1588 //  strdupesc ("foo\nbar") --> 'f' 'o' 'o' 012 'b' 'a' 'r'
1589 //
1590 //  Handles:
1591 //   \\  backslash
1592 //   \n  newline
1593 //   \t  tab
1594 //   \f  formfeed
1595 //   \r  carriage return
1596 //   \0  null              // doesn't work, commented out.
1597 //
1598 // \\ doesn't seem to work...
1599 //  Also, a scp specific:
1600 //
1601 //   \e  (end simulation)
1602 //
1603 //  the scp parser doesn't handle these very well...
1604 //
1605 //   \_  space
1606 //   \c  comma
1607 //   \s  semicolon
1608 //   \d  dollar
1609 //   \q  double quote
1610 //   \w  <backslash>
1611 //   \z  ^D eof (DECism)
1612 //   \^  caret
1613 //   \x  expect; used by the autoinput parser
1614 //
1615 // And a special case:
1616 //
1617 //   \TZ replaced with the timezone string. Three characters are used
1618 //       to allow for space in the buffer.
1619 //
1620 //  all others silently ignored and left unprocessed
1621 //
1622 
1623 char * strdupesc (const char * str)
     /*  */
1624   {
1625     char * buf = strdup (str);
1626     if (!buf)
1627       {
1628         fprintf(stderr, "\rFATAL: Out of memory! Aborting at %s[%s:%d]\r\n",
1629                 __func__, __FILE__, __LINE__);
1630 #if defined(USE_BACKTRACE)
1631 # ifdef SIGUSR2
1632         (void)raise(SIGUSR2);
1633         /*NOTREACHED*/ /* unreachable */
1634 # endif /* ifdef SIGUSR2 */
1635 #endif /* if defined(USE_BACKTRACE) */
1636         abort();
1637       }
1638     char * p = buf;
1639     while (* p)
1640       {
1641         if (* p != '\\')
1642           {
1643             p ++;
1644             continue;
1645           }
1646         if (p [1] == '\\')           //   \\    backslash
1647           * p = '\\'; //-V1048
1648         else if (p [1] == 'a')       //   \a    ^A
1649           * p = '\001';
1650         else if (p [1] == 'w')       //   \w    backslash
1651           * p = '\\'; //-V1048
1652         else if (p [1] == 'n')       //   \n    newline
1653           * p = '\n';
1654         else if (p [1] == 't')       //  \t    tab
1655           * p = '\t';
1656         else if (p [1] == 'f')       //  \f    formfeed
1657           * p = '\f';
1658         else if (p [1] == 'r')       //  \r    carriage return
1659           * p = '\r';
1660         else if (p [1] == 'e')       //  \e    ^E; Multics escape char.
1661           * p = '\005';
1662         else if (p [1] == '_')       //  \_    space; needed for leading or
1663                                      //        trailing spaces (scp parser
1664                                      //        issue)
1665           * p = ' ';
1666         else if (p [1] == 'c')       //  \c    comma (scp parser issue)
1667           * p = ',';
1668         else if (p [1] == 's')       //  \s    semicolon (scp parser issue)
1669           * p = ';';
1670         else if (p [1] == 'd')       //  \d    dollar sign (scp parser issue)
1671           * p = '$';
1672         else if (p [1] == 'q')       //  \q    double quote (scp parser issue)
1673           * p = '"';
1674         else if (p [1] == 'z')       //  \z    ^D eof (VAXism)
1675           * p = '\004';
1676         else if (p [1] == 'k')       //  \k    caret
1677           * p = '^';
1678         else if (p [1] == 'x')       //  \x    expect
1679           * p = '\030';
1680         else if (p [1] == 'y')       //  \y    expect
1681           * p = '\031';
1682         //else if (p [1] == '0')       //  \0    null; used as end of expect string
1683           //* p = 0;
1684 
1685 
1686 
1687 
1688 
1689 
1690 
1691 
1692 
1693 
1694 
1695 
1696 
1697 
1698 
1699 
1700 
1701         else
1702           {
1703             p ++;
1704             continue;
1705           }
1706         p ++;
1707         memmove (p, p + 1, strlen (p + 1) + 1);
1708       }
1709     return buf;
1710   }
1711 
1712 // Layout of data as read from tape file format
1713 //
1714 //   bits: buffer of bits from tape. The data is
1715 //   packed as 2 36 bit words in 9 eight bit bytes
1716 //     (2 * 36 == 7 * 9)
1717 //   The of the bytes in bits is
1718 //      byte     value
1719 //       0       most significant byte in word 0
1720 //       1       2nd msb in word 0
1721 //       2       3rd msb in word 0
1722 //       3       4th msb in word 0
1723 //       4       upper half is 4 least significant bits in word 0
1724 //               lower half is 4 most significant bit in word 1
1725 //       5       5th to 13th most significant bits in word 1
1726 //       6       ...
1727 //       7       ...
1728 //       8       least significant byte in word 1
1729 //
1730 
1731 // Multics humor: this is idiotic
1732 
1733 // Data conversion routines
1734 //
1735 //  'bits' is the packed bit stream read from the tape
1736 //    it is assumed to start at an even word36 address
1737 //
1738 //   extr36
1739 //     extract the word36 at woffset
1740 //
1741 
1742 static word36 extrASCII36 (uint8 * bits, uint woffset)
     /*  */
1743   {
1744     uint8 * p = bits + woffset * 4;
1745 
1746     uint64 w;
1747     w  = ((uint64) p [0]) << 27;
1748     w |= ((uint64) p [1]) << 18;
1749     w |= ((uint64) p [2]) << 9;
1750     w |= ((uint64) p [3]);
1751     // mask shouldn't be necessary but is robust
1752     return (word36) (w & MASK36);
1753   }
1754 
1755 // Data conversion routines
1756 //
1757 //  'bits' is the packed bit stream read from the tape
1758 //    it is assumed to start at an even word36 address
1759 //
1760 //   extr36
1761 //     extract the word36 at woffset
1762 //
1763 
1764 word36 extr36 (uint8 * bits, uint woffset)
     /*  */
1765   {
1766     uint isOdd = woffset % 2;
1767     uint dwoffset = woffset / 2;
1768     uint8 * p = bits + dwoffset * 9;
1769 
1770     uint64 w;
1771     if (isOdd)
1772       {
1773         w  = (((uint64) p [4]) & 0xf) << 32;
1774         w |=  ((uint64) p [5]) << 24;
1775         w |=  ((uint64) p [6]) << 16;
1776         w |=  ((uint64) p [7]) << 8;
1777         w |=  ((uint64) p [8]);
1778       }
1779     else
1780       {
1781         w  =  ((uint64) p [0]) << 28;
1782         w |=  ((uint64) p [1]) << 20;
1783         w |=  ((uint64) p [2]) << 12;
1784         w |=  ((uint64) p [3]) << 4;
1785         w |= (((uint64) p [4]) >> 4) & 0xf;
1786       }
1787     // mask shouldn't be necessary but is robust
1788     return (word36) (w & MASK36);
1789   }
1790 
1791 static void putASCII36 (word36 val, uint8 * bits, uint woffset)
     /*  */
1792   {
1793     uint8 * p = bits + woffset * 4;
1794     p [0]  = (val >> 27) & 0xff;
1795     p [1]  = (val >> 18) & 0xff;
1796     p [2]  = (val >>  9) & 0xff;
1797     p [3]  = (val      ) & 0xff;
1798   }
1799 
1800 void put36 (word36 val, uint8 * bits, uint woffset)
     /*  */
1801   {
1802     uint isOdd = woffset % 2;
1803     uint dwoffset = woffset / 2;
1804     uint8 * p = bits + dwoffset * 9;
1805 
1806     if (isOdd)
1807       {
1808         p [4] &=               0xf0;
1809         p [4] |= (val >> 32) & 0x0f;
1810         p [5]  = (val >> 24) & 0xff;
1811         p [6]  = (val >> 16) & 0xff;
1812         p [7]  = (val >>  8) & 0xff;
1813         p [8]  = (val >>  0) & 0xff;
1814         //w  = ((uint64) (p [4] & 0xf)) << 32;
1815         //w |=  (uint64) (p [5]) << 24;
1816         //w |=  (uint64) (p [6]) << 16;
1817         //w |=  (uint64) (p [7]) << 8;
1818         //w |=  (uint64) (p [8]);
1819       }
1820     else
1821       {
1822         p [0]  = (val >> 28) & 0xff;
1823         p [1]  = (val >> 20) & 0xff;
1824         p [2]  = (val >> 12) & 0xff;
1825         p [3]  = (val >>  4) & 0xff;
1826         p [4] &=               0x0f;
1827         p [4] |= (val <<  4) & 0xf0;
1828         //w  =  (uint64) (p [0]) << 28;
1829         //w |=  (uint64) (p [1]) << 20;
1830         //w |=  (uint64) (p [2]) << 12;
1831         //w |=  (uint64) (p [3]) << 4;
1832         //w |= ((uint64) (p [4]) >> 4) & 0xf;
1833       }
1834     // mask shouldn't be necessary but is robust
1835   }
1836 
1837 int extractASCII36FromBuffer (uint8 * bufp, t_mtrlnt tbc, uint * words_processed, word36 *wordp)
     /*  */
1838   {
1839     uint wp = * words_processed; // How many words have been processed
1840 
1841     // 1 dps8m word == 4 bytes
1842 
1843     uint bytes_processed = wp * 4;
1844     if (bytes_processed >= tbc)
1845       return 1;
1846     //sim_printf ("store 0%08lo@0%012"PRIo64"\n", wordp - M, extr36 (bufp, wp));
1847 
1848     * wordp = extrASCII36 (bufp, wp);
1849     //if (* wordp & ~MASK36) sim_printf (">>>>>>> extr %012"PRIo64"\n", * wordp);
1850     //sim_printf ("* %06lo = %012"PRIo64"\n", wordp - M, * wordp);
1851     (* words_processed) ++;
1852 
1853     return 0;
1854   }
1855 
1856 int extractWord36FromBuffer (uint8 * bufp, t_mtrlnt tbc, uint * words_processed, word36 *wordp)
     /*  */
1857   {
1858     uint wp = * words_processed; // How many words have been processed
1859 
1860     // 2 dps8m words == 9 bytes
1861 
1862     uint bytes_processed = (wp * 9 + 1) / 2;
1863     if (bytes_processed >= tbc)
1864       return 1;
1865     //sim_printf ("store 0%08lo@0%012"PRIo64"\n", wordp - M, extr36 (bufp, wp));
1866 
1867     * wordp = extr36 (bufp, wp);
1868     //if (* wordp & ~MASK36) sim_printf (">>>>>>> extr %012"PRIo64"\n", * wordp);
1869     //sim_printf ("* %06lo = %012"PRIo64"\n", wordp - M, * wordp);
1870     (* words_processed) ++;
1871 
1872     return 0;
1873   }
1874 
1875 int insertASCII36toBuffer (uint8 * bufp, t_mtrlnt tbc, uint * words_processed, word36 word)
     /*  */
1876   {
1877     uint wp = * words_processed; // How many words have been processed
1878 
1879     // 1 dps8m word == 4 bytes
1880 
1881     uint bytes_processed = wp * 4;
1882     if (bytes_processed >= tbc)
1883       return 1;
1884     //sim_printf ("store 0%08lo@0%012"PRIo64"\n", wordp - M, extr36 (bufp, wp));
1885 
1886     putASCII36 (word, bufp, wp);
1887     //sim_printf ("* %06lo = %012"PRIo64"\n", wordp - M, * wordp);
1888     (* words_processed) ++;
1889 
1890     return 0;
1891   }
1892 
1893 int insertWord36toBuffer (uint8 * bufp, t_mtrlnt tbc, uint * words_processed, word36 word)
     /*  */
1894   {
1895     uint wp = * words_processed; // How many words have been processed
1896 
1897     // 2 dps8m words == 9 bytes
1898 
1899     uint bytes_processed = (wp * 9 + 1) / 2;
1900     if (bytes_processed >= tbc)
1901       return 1;
1902     //sim_printf ("store 0%08lo@0%012"PRIo64"\n", wordp - M, extr36 (bufp, wp));
1903 
1904     put36 (word, bufp, wp);
1905     //sim_printf ("* %06lo = %012"PRIo64"\n", wordp - M, * wordp);
1906     (* words_processed) ++;
1907 
1908     return 0;
1909   }
1910 
1911 #ifndef NEED_128
1912 static void print_uint128o_r (uint128 n, char * p)
     /*  */
1913   {
1914     if (n == 0)
1915       return;
1916 
1917     print_uint128o_r(n / 8, p);
1918     if (p)
1919       {
1920         char s [2];
1921         s [0] = n % 8 + '0';
1922         s [1] = '\0';
1923         strcat (p, s);
1924       }
1925     else
1926       sim_printf("%c", (int) (n%8+0x30));
1927   }
1928 
1929 char * print_int128o (int128 n, char * p)
     /*  */
1930   {
1931     if (n == 0)
1932       {
1933         if (p)
1934           strcat (p, "0");
1935         else
1936           sim_printf ("0");
1937         return p;
1938       }
1939     print_uint128o_r ((uint128) n, p);
1940     return p;
1941   }
1942 
1943 static void print_uint128_r (uint128 n, char * p)
     /*  */
1944   {
1945     if (n == 0)
1946       return;
1947 
1948     print_uint128_r(n / 10, p);
1949     if (p)
1950       {
1951         char s [2];
1952         s [0] = n % 10 + '0';
1953         s [1] = '\0';
1954         strcat (p, s);
1955       }
1956     else
1957       sim_printf("%c", (int) (n%10+0x30));
1958   }
1959 
1960 void print_int128 (int128 n, char * p)
     /*  */
1961   {
1962     if (n == 0)
1963       {
1964         if (p)
1965           strcat (p, "0");
1966         else
1967           sim_printf ("0");
1968         return;
1969       }
1970     if (n < 0)
1971       {
1972         if (p)
1973           strcat (p, "-");
1974         else
1975           sim_printf ("-");
1976         n = -n;
1977       }
1978     print_uint128_r ((uint128) n, p);
1979   }
1980 #endif
1981 
1982 void timespec_diff(struct timespec * start, struct timespec * stop,
     /*  */
1983                    struct timespec * result)
1984 {
1985     if ((stop->tv_nsec - start->tv_nsec) < 0) {
1986         result->tv_sec = stop->tv_sec - start->tv_sec - 1;
1987         result->tv_nsec = stop->tv_nsec - start->tv_nsec + 1000000000L;
1988     } else {
1989         result->tv_sec = stop->tv_sec - start->tv_sec;
1990         result->tv_nsec = stop->tv_nsec - start->tv_nsec;
1991     }
1992 
1993     return;
1994 }
1995 
1996 
1997 
1998 
1999 
2000 
2001 
2002 
2003 
2004 
2005 
2006 
2007 
2008 
2009 
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2028
/* */
root/src/dps8/dps8_utils.c

DEFINITIONS
