libguile/vm-i-scheme.c

   1 /* Copyright (C) 2001, 2009, 2010 Free Software Foundation, Inc.
   2  *
   3  * This library is free software; you can redistribute it and/or
   4  * modify it under the terms of the GNU Lesser General Public License
   5  * as published by the Free Software Foundation; either version 3 of
   6  * the License, or (at your option) any later version.
   7  *
   8  * This library is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * Lesser General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU Lesser General Public
  14  * License along with this library; if not, write to the Free Software
  15  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  16  * 02110-1301 USA
  17  */
  18
  19 /* This file is included in vm_engine.c */
  20
  21 \f
  22 /*
  23  * Predicates
  24  */
  25
  26 #define ARGS1(a1)       SCM a1 = sp[0];
  27 #define ARGS2(a1,a2)    SCM a1 = sp[-1], a2 = sp[0]; sp--; NULLSTACK (1);
  28 #define ARGS3(a1,a2,a3) SCM a1 = sp[-2], a2 = sp[-1], a3 = sp[0]; sp -= 2; NULLSTACK (2);
  29
  30 #define RETURN(x)       do { *sp = x; NEXT; } while (0)
  31
  32 VM_DEFINE_FUNCTION (128, not, "not", 1)
  33 {
  34   ARGS1 (x);
  35   RETURN (scm_from_bool (scm_is_false (x)));
  36 }
  37
  38 VM_DEFINE_FUNCTION (129, not_not, "not-not", 1)
  39 {
  40   ARGS1 (x);
  41   RETURN (scm_from_bool (!scm_is_false (x)));
  42 }
  43
  44 VM_DEFINE_FUNCTION (130, eq, "eq?", 2)
  45 {
  46   ARGS2 (x, y);
  47   RETURN (scm_from_bool (scm_is_eq (x, y)));
  48 }
  49
  50 VM_DEFINE_FUNCTION (131, not_eq, "not-eq?", 2)
  51 {
  52   ARGS2 (x, y);
  53   RETURN (scm_from_bool (!scm_is_eq (x, y)));
  54 }
  55
  56 VM_DEFINE_FUNCTION (132, nullp, "null?", 1)
  57 {
  58   ARGS1 (x);
  59   RETURN (scm_from_bool (scm_is_null (x)));
  60 }
  61
  62 VM_DEFINE_FUNCTION (133, not_nullp, "not-null?", 1)
  63 {
  64   ARGS1 (x);
  65   RETURN (scm_from_bool (!scm_is_null (x)));
  66 }
  67
  68 VM_DEFINE_FUNCTION (134, eqv, "eqv?", 2)
  69 {
  70   ARGS2 (x, y);
  71   if (scm_is_eq (x, y))
  72     RETURN (SCM_BOOL_T);
  73   if (SCM_IMP (x) || SCM_IMP (y))
  74     RETURN (SCM_BOOL_F);
  75   SYNC_REGISTER ();
  76   RETURN (scm_eqv_p (x, y));
  77 }
  78
  79 VM_DEFINE_FUNCTION (135, equal, "equal?", 2)
  80 {
  81   ARGS2 (x, y);
  82   if (scm_is_eq (x, y))
  83     RETURN (SCM_BOOL_T);
  84   if (SCM_IMP (x) || SCM_IMP (y))
  85     RETURN (SCM_BOOL_F);
  86   SYNC_REGISTER ();
  87   RETURN (scm_equal_p (x, y));
  88 }
  89
  90 VM_DEFINE_FUNCTION (136, pairp, "pair?", 1)
  91 {
  92   ARGS1 (x);
  93   RETURN (scm_from_bool (scm_is_pair (x)));
  94 }
  95
  96 VM_DEFINE_FUNCTION (137, listp, "list?", 1)
  97 {
  98   ARGS1 (x);
  99   RETURN (scm_from_bool (scm_ilength (x) >= 0));
 100 }
 101
 102 VM_DEFINE_FUNCTION (138, symbolp, "symbol?", 1)
 103 {
 104   ARGS1 (x);
 105   RETURN (scm_from_bool (scm_is_symbol (x)));
 106 }
 107
 108 VM_DEFINE_FUNCTION (139, vectorp, "vector?", 1)
 109 {
 110   ARGS1 (x);
 111   RETURN (scm_from_bool (SCM_I_IS_VECTOR (x)));
 112 }
 113
 114 \f
 115 /*
 116  * Basic data
 117  */
 118
 119 VM_DEFINE_FUNCTION (140, cons, "cons", 2)
 120 {
 121   ARGS2 (x, y);
 122   CONS (x, x, y);
 123   RETURN (x);
 124 }
 125
 126 #define VM_VALIDATE_CONS(x, proc)               \
 127   if (SCM_UNLIKELY (!scm_is_pair (x)))          \
 128     { func_name = proc;                         \
 129       finish_args = x;                          \
 130       goto vm_error_not_a_pair;                 \
 131     }
 132
 133 VM_DEFINE_FUNCTION (141, car, "car", 1)
 134 {
 135   ARGS1 (x);
 136   VM_VALIDATE_CONS (x, "car");
 137   RETURN (SCM_CAR (x));
 138 }
 139
 140 VM_DEFINE_FUNCTION (142, cdr, "cdr", 1)
 141 {
 142   ARGS1 (x);
 143   VM_VALIDATE_CONS (x, "cdr");
 144   RETURN (SCM_CDR (x));
 145 }
 146
 147 VM_DEFINE_INSTRUCTION (143, set_car, "set-car!", 0, 2, 0)
 148 {
 149   SCM x, y;
 150   POP (y);
 151   POP (x);
 152   VM_VALIDATE_CONS (x, "set-car!");
 153   SCM_SETCAR (x, y);
 154   NEXT;
 155 }
 156
 157 VM_DEFINE_INSTRUCTION (144, set_cdr, "set-cdr!", 0, 2, 0)
 158 {
 159   SCM x, y;
 160   POP (y);
 161   POP (x);
 162   VM_VALIDATE_CONS (x, "set-cdr!");
 163   SCM_SETCDR (x, y);
 164   NEXT;
 165 }
 166
 167 \f
 168 /*
 169  * Numeric relational tests
 170  */
 171
 172 #undef REL
 173 #define REL(crel,srel)                                          \
 174 {                                                               \
 175   ARGS2 (x, y);                                                 \
 176   if (SCM_I_INUMP (x) && SCM_I_INUMP (y))                       \
 177     RETURN (scm_from_bool ((scm_t_signed_bits) (x)              \
 178                            crel (scm_t_signed_bits) (y)));      \
 179   SYNC_REGISTER ();                                             \
 180   RETURN (srel (x, y));                                         \
 181 }
 182
 183 VM_DEFINE_FUNCTION (145, ee, "ee?", 2)
 184 {
 185   REL (==, scm_num_eq_p);
 186 }
 187
 188 VM_DEFINE_FUNCTION (146, lt, "lt?", 2)
 189 {
 190   REL (<, scm_less_p);
 191 }
 192
 193 VM_DEFINE_FUNCTION (147, le, "le?", 2)
 194 {
 195   REL (<=, scm_leq_p);
 196 }
 197
 198 VM_DEFINE_FUNCTION (148, gt, "gt?", 2)
 199 {
 200   REL (>, scm_gr_p);
 201 }
 202
 203 VM_DEFINE_FUNCTION (149, ge, "ge?", 2)
 204 {
 205   REL (>=, scm_geq_p);
 206 }
 207
 208 \f
 209 /*
 210  * Numeric functions
 211  */
 212
 213 /* The maximum/minimum tagged integers.  */
 214 #undef INUM_MAX
 215 #undef INUM_MIN
 216 #define INUM_MAX (INTPTR_MAX - 1)
 217 #define INUM_MIN (INTPTR_MIN + scm_tc2_int)
 218
 219 #undef FUNC2
 220 #define FUNC2(CFUNC,SFUNC)                              \
 221 {                                                       \
 222   ARGS2 (x, y);                                         \
 223   if (SCM_I_INUMP (x) && SCM_I_INUMP (y))               \
 224     {                                                   \
 225       scm_t_int64 n = SCM_I_INUM (x) CFUNC SCM_I_INUM (y);\
 226       if (SCM_FIXABLE (n))                              \
 227         RETURN (SCM_I_MAKINUM (n));                     \
 228     }                                                   \
 229   SYNC_REGISTER ();                                     \
 230   RETURN (SFUNC (x, y));                                \
 231 }
 232
 233 /* Assembly tagged integer arithmetic routines.  This code uses the
 234    `asm goto' feature introduced in GCC 4.5.  */
 235
 236 #if defined __x86_64__ && SCM_GNUC_PREREQ (4, 5)
 237
 238 /* The macros below check the CPU's overflow flag to improve fixnum
 239    arithmetic.  The %rcx register is explicitly clobbered because `asm
 240    goto' can't have outputs, in which case the `r' constraint could be
 241    used to let the register allocator choose a register.
 242
 243    TODO: Use `cold' label attribute in GCC 4.6.
 244    http://gcc.gnu.org/ml/gcc-patches/2010-10/msg01777.html  */
 245
 246 # define ASM_ADD(x, y)                                                  \
 247     {                                                                   \
 248       asm volatile goto ("mov %1, %%rcx; "                              \
 249                          "test %[tag], %%cl; je %l[slow_add]; "         \
 250                          "test %[tag], %0;   je %l[slow_add]; "         \
 251                          "add %0, %%rcx;     jo %l[slow_add]; "         \
 252                          "sub %[tag], %%rcx; "                          \
 253                          "mov %%rcx, (%[vsp])\n"                        \
 254                          : /* no outputs */                             \
 255                          : "r" (x), "r" (y),                            \
 256                            [vsp] "r" (sp), [tag] "i" (scm_tc2_int)      \
 257                          : "rcx", "memory"                              \
 258                          : slow_add);                                   \
 259       NEXT;                                                             \
 260     }                                                                   \
 261   slow_add:                                                             \
 262     do { } while (0)
 263
 264 # define ASM_SUB(x, y)                                                  \
 265     {                                                                   \
 266       asm volatile goto ("mov %0, %%rcx; "                              \
 267                          "test %[tag], %%cl; je %l[slow_sub]; "         \
 268                          "test %[tag], %1;   je %l[slow_sub]; "         \
 269                          "sub %1, %%rcx;     jo %l[slow_sub]; "         \
 270                          "add %[tag], %%rcx; "                          \
 271                          "mov %%rcx, (%[vsp])\n"                        \
 272                          : /* no outputs */                             \
 273                          : "r" (x), "r" (y),                            \
 274                            [vsp] "r" (sp), [tag] "i" (scm_tc2_int)      \
 275                          : "rcx", "memory"                              \
 276                          : slow_sub);                                   \
 277       NEXT;                                                             \
 278     }                                                                   \
 279   slow_sub:                                                             \
 280     do { } while (0)
 281
 282 #endif
 283
 284
 285 VM_DEFINE_FUNCTION (150, add, "add", 2)
 286 {
 287 #ifndef ASM_ADD
 288   FUNC2 (+, scm_sum);
 289 #else
 290   ARGS2 (x, y);
 291   ASM_ADD (x, y);
 292   SYNC_REGISTER ();
 293   RETURN (scm_sum (x, y));
 294 #endif
 295 }
 296
 297 VM_DEFINE_FUNCTION (151, add1, "add1", 1)
 298 {
 299   ARGS1 (x);
 300
 301   /* Check for overflow.  */
 302   if (SCM_LIKELY ((scm_t_intptr) x < INUM_MAX))
 303     {
 304       SCM result;
 305
 306       /* Add the integers without untagging.  */
 307       result = SCM_PACK ((scm_t_intptr) x
 308                          + (scm_t_intptr) SCM_I_MAKINUM (1)
 309                          - scm_tc2_int);
 310
 311       if (SCM_LIKELY (SCM_I_INUMP (result)))
 312         RETURN (result);
 313     }
 314
 315   SYNC_REGISTER ();
 316   RETURN (scm_sum (x, SCM_I_MAKINUM (1)));
 317 }
 318
 319 VM_DEFINE_FUNCTION (152, sub, "sub", 2)
 320 {
 321 #ifndef ASM_SUB
 322   FUNC2 (-, scm_difference);
 323 #else
 324   ARGS2 (x, y);
 325   ASM_SUB (x, y);
 326   SYNC_REGISTER ();
 327   RETURN (scm_difference (x, y));
 328 #endif
 329 }
 330
 331 VM_DEFINE_FUNCTION (153, sub1, "sub1", 1)
 332 {
 333   ARGS1 (x);
 334
 335   /* Check for underflow.  */
 336   if (SCM_LIKELY ((scm_t_intptr) x > INUM_MIN))
 337     {
 338       SCM result;
 339
 340       /* Substract the integers without untagging.  */
 341       result = SCM_PACK ((scm_t_intptr) x
 342                          - (scm_t_intptr) SCM_I_MAKINUM (1)
 343                          + scm_tc2_int);
 344
 345       if (SCM_LIKELY (SCM_I_INUMP (result)))
 346         RETURN (result);
 347     }
 348
 349   SYNC_REGISTER ();
 350   RETURN (scm_difference (x, SCM_I_MAKINUM (1)));
 351 }
 352
 353 # undef ASM_ADD
 354 # undef ASM_SUB
 355
 356 VM_DEFINE_FUNCTION (154, mul, "mul", 2)
 357 {
 358   ARGS2 (x, y);
 359   SYNC_REGISTER ();
 360   RETURN (scm_product (x, y));
 361 }
 362
 363 VM_DEFINE_FUNCTION (155, div, "div", 2)
 364 {
 365   ARGS2 (x, y);
 366   SYNC_REGISTER ();
 367   RETURN (scm_divide (x, y));
 368 }
 369
 370 VM_DEFINE_FUNCTION (156, quo, "quo", 2)
 371 {
 372   ARGS2 (x, y);
 373   SYNC_REGISTER ();
 374   RETURN (scm_quotient (x, y));
 375 }
 376
 377 VM_DEFINE_FUNCTION (157, rem, "rem", 2)
 378 {
 379   ARGS2 (x, y);
 380   SYNC_REGISTER ();
 381   RETURN (scm_remainder (x, y));
 382 }
 383
 384 VM_DEFINE_FUNCTION (158, mod, "mod", 2)
 385 {
 386   ARGS2 (x, y);
 387   SYNC_REGISTER ();
 388   RETURN (scm_modulo (x, y));
 389 }
 390
 391 VM_DEFINE_FUNCTION (159, ash, "ash", 2)
 392 {
 393   ARGS2 (x, y);
 394   if (SCM_I_INUMP (x) && SCM_I_INUMP (y))
 395     {
 396       if (SCM_I_INUM (y) < 0)
 397         /* Right shift, will be a fixnum. */
 398         RETURN (SCM_I_MAKINUM (SCM_I_INUM (x) >> -SCM_I_INUM (y)));
 399       else
 400         /* Left shift. See comments in scm_ash. */
 401         {
 402           scm_t_signed_bits nn, bits_to_shift;
 403
 404           nn = SCM_I_INUM (x);
 405           bits_to_shift = SCM_I_INUM (y);
 406
 407           if (bits_to_shift < SCM_I_FIXNUM_BIT-1
 408               && ((scm_t_bits)
 409                   (SCM_SRS (nn, (SCM_I_FIXNUM_BIT-1 - bits_to_shift)) + 1)
 410                   <= 1))
 411             RETURN (SCM_I_MAKINUM (nn << bits_to_shift));
 412           /* fall through */
 413         }
 414       /* fall through */
 415     }
 416   SYNC_REGISTER ();
 417   RETURN (scm_ash (x, y));
 418 }
 419
 420 VM_DEFINE_FUNCTION (160, logand, "logand", 2)
 421 {
 422   ARGS2 (x, y);
 423   if (SCM_I_INUMP (x) && SCM_I_INUMP (y))
 424     RETURN (SCM_I_MAKINUM (SCM_I_INUM (x) & SCM_I_INUM (y)));
 425   SYNC_REGISTER ();
 426   RETURN (scm_logand (x, y));
 427 }
 428
 429 VM_DEFINE_FUNCTION (161, logior, "logior", 2)
 430 {
 431   ARGS2 (x, y);
 432   if (SCM_I_INUMP (x) && SCM_I_INUMP (y))
 433     RETURN (SCM_I_MAKINUM (SCM_I_INUM (x) | SCM_I_INUM (y)));
 434   SYNC_REGISTER ();
 435   RETURN (scm_logior (x, y));
 436 }
 437
 438 VM_DEFINE_FUNCTION (162, logxor, "logxor", 2)
 439 {
 440   ARGS2 (x, y);
 441   if (SCM_I_INUMP (x) && SCM_I_INUMP (y))
 442     RETURN (SCM_I_MAKINUM (SCM_I_INUM (x) ^ SCM_I_INUM (y)));
 443   SYNC_REGISTER ();
 444   RETURN (scm_logxor (x, y));
 445 }
 446
 447 \f
 448 /*
 449  * Vectors and arrays
 450  */
 451
 452 VM_DEFINE_FUNCTION (163, vector_ref, "vector-ref", 2)
 453 {
 454   scm_t_signed_bits i = 0;
 455   ARGS2 (vect, idx);
 456   if (SCM_LIKELY (SCM_I_IS_NONWEAK_VECTOR (vect)
 457                   && SCM_I_INUMP (idx)
 458                   && ((i = SCM_I_INUM (idx)) >= 0)
 459                   && i < SCM_I_VECTOR_LENGTH (vect)))
 460     RETURN (SCM_I_VECTOR_ELTS (vect)[i]);
 461   else
 462     {
 463       SYNC_REGISTER ();
 464       RETURN (scm_vector_ref (vect, idx));
 465     }
 466 }
 467
 468 VM_DEFINE_INSTRUCTION (164, vector_set, "vector-set", 0, 3, 0)
 469 {
 470   scm_t_signed_bits i = 0;
 471   SCM vect, idx, val;
 472   POP (val); POP (idx); POP (vect);
 473   if (SCM_LIKELY (SCM_I_IS_NONWEAK_VECTOR (vect)
 474                   && SCM_I_INUMP (idx)
 475                   && ((i = SCM_I_INUM (idx)) >= 0)
 476                   && i < SCM_I_VECTOR_LENGTH (vect)))
 477     SCM_I_VECTOR_WELTS (vect)[i] = val;
 478   else
 479     {
 480       SYNC_REGISTER ();
 481       scm_vector_set_x (vect, idx, val);
 482     }
 483   NEXT;
 484 }
 485
 486 VM_DEFINE_INSTRUCTION (165, make_array, "make-array", 3, -1, 1)
 487 {
 488   scm_t_uint32 len;
 489   SCM shape, ret;
 490
 491   len = FETCH ();
 492   len = (len << 8) + FETCH ();
 493   len = (len << 8) + FETCH ();
 494   POP (shape);
 495   SYNC_REGISTER ();
 496   PRE_CHECK_UNDERFLOW (len);
 497   ret = scm_from_contiguous_array (shape, sp - len + 1, len);
 498   DROPN (len);
 499   PUSH (ret);
 500   NEXT;
 501 }
 502
 503 \f
 504 /*
 505  * Structs
 506  */
 507 #define VM_VALIDATE_STRUCT(obj, proc)           \
 508   if (SCM_UNLIKELY (!SCM_STRUCTP (obj)))        \
 509     {                                           \
 510       func_name = proc;                         \
 511       finish_args = (obj);                      \
 512       goto vm_error_not_a_struct;               \
 513     }
 514
 515 VM_DEFINE_FUNCTION (166, struct_p, "struct?", 1)
 516 {
 517   ARGS1 (obj);
 518   RETURN (scm_from_bool (SCM_STRUCTP (obj)));
 519 }
 520
 521 VM_DEFINE_FUNCTION (167, struct_vtable, "struct-vtable", 1)
 522 {
 523   ARGS1 (obj);
 524   VM_VALIDATE_STRUCT (obj, "struct_vtable");
 525   RETURN (SCM_STRUCT_VTABLE (obj));
 526 }
 527
 528 VM_DEFINE_INSTRUCTION (168, make_struct, "make-struct", 2, -1, 1)
 529 {
 530   unsigned h = FETCH ();
 531   unsigned l = FETCH ();
 532   scm_t_bits n = ((h << 8U) + l);
 533   SCM vtable = sp[-(n - 1)];
 534   const SCM *inits = sp - n + 2;
 535   SCM ret;
 536
 537   SYNC_REGISTER ();
 538
 539   if (SCM_LIKELY (SCM_STRUCTP (vtable)
 540                   && SCM_VTABLE_FLAG_IS_SET (vtable, SCM_VTABLE_FLAG_SIMPLE)
 541                   && (SCM_STRUCT_DATA_REF (vtable, scm_vtable_index_size) + 1
 542                       == n)
 543                   && !SCM_VTABLE_INSTANCE_FINALIZER (vtable)))
 544     {
 545       /* Verily, we are making a simple struct with the right number of
 546          initializers, and no finalizer. */
 547       ret = scm_words ((scm_t_bits)SCM_STRUCT_DATA (vtable) | scm_tc3_struct,
 548                        n + 1);
 549       SCM_SET_CELL_WORD_1 (ret, (scm_t_bits)SCM_CELL_OBJECT_LOC (ret, 2));
 550       memcpy (SCM_STRUCT_DATA (ret), inits, (n - 1) * sizeof (SCM));
 551     }
 552   else
 553     ret = scm_c_make_structv (vtable, 0, n - 1, (scm_t_bits *) inits);
 554
 555   DROPN (n);
 556   PUSH (ret);
 557
 558   NEXT;
 559 }
 560
 561 VM_DEFINE_FUNCTION (169, struct_ref, "struct-ref", 2)
 562 {
 563   ARGS2 (obj, pos);
 564
 565   if (SCM_LIKELY (SCM_STRUCTP (obj)
 566                   && SCM_STRUCT_VTABLE_FLAG_IS_SET (obj,
 567                                                     SCM_VTABLE_FLAG_SIMPLE)
 568                   && SCM_I_INUMP (pos)))
 569     {
 570       SCM vtable;
 571       scm_t_bits index, len;
 572
 573       /* True, an inum is a signed value, but cast to unsigned it will
 574          certainly be more than the length, so we will fall through if
 575          index is negative. */
 576       index = SCM_I_INUM (pos);
 577       vtable = SCM_STRUCT_VTABLE (obj);
 578       len = SCM_STRUCT_DATA_REF (vtable, scm_vtable_index_size);
 579
 580       if (SCM_LIKELY (index < len))
 581         {
 582           scm_t_bits *data = SCM_STRUCT_DATA (obj);
 583           RETURN (SCM_PACK (data[index]));
 584         }
 585     }
 586
 587   SYNC_REGISTER ();
 588   RETURN (scm_struct_ref (obj, pos));
 589 }
 590
 591 VM_DEFINE_FUNCTION (170, struct_set, "struct-set", 3)
 592 {
 593   ARGS3 (obj, pos, val);
 594
 595   if (SCM_LIKELY (SCM_STRUCTP (obj)
 596                   && SCM_STRUCT_VTABLE_FLAG_IS_SET (obj,
 597                                                     SCM_VTABLE_FLAG_SIMPLE)
 598                   && SCM_STRUCT_VTABLE_FLAG_IS_SET (obj,
 599                                                     SCM_VTABLE_FLAG_SIMPLE_RW)
 600                   && SCM_I_INUMP (pos)))
 601     {
 602       SCM vtable;
 603       scm_t_bits index, len;
 604
 605       /* See above regarding index being >= 0. */
 606       index = SCM_I_INUM (pos);
 607       vtable = SCM_STRUCT_VTABLE (obj);
 608       len = SCM_STRUCT_DATA_REF (vtable, scm_vtable_index_size);
 609       if (SCM_LIKELY (index < len))
 610         {
 611           scm_t_bits *data = SCM_STRUCT_DATA (obj);
 612           data[index] = SCM_UNPACK (val);
 613           RETURN (val);
 614         }
 615     }
 616
 617   SYNC_REGISTER ();
 618   RETURN (scm_struct_set_x (obj, pos, val));
 619 }
 620
 621 \f
 622 /*
 623  * GOOPS support
 624  */
 625 VM_DEFINE_FUNCTION (171, class_of, "class-of", 1)
 626 {
 627   ARGS1 (obj);
 628   if (SCM_INSTANCEP (obj))
 629     RETURN (SCM_CLASS_OF (obj));
 630   SYNC_REGISTER ();
 631   RETURN (scm_class_of (obj));
 632 }
 633
 634 /* FIXME: No checking whatsoever. */
 635 VM_DEFINE_FUNCTION (172, slot_ref, "slot-ref", 2)
 636 {
 637   size_t slot;
 638   ARGS2 (instance, idx);
 639   slot = SCM_I_INUM (idx);
 640   RETURN (SCM_PACK (SCM_STRUCT_DATA (instance) [slot]));
 641 }
 642
 643 /* FIXME: No checking whatsoever. */
 644 VM_DEFINE_INSTRUCTION (173, slot_set, "slot-set", 0, 3, 0)
 645 {
 646   SCM instance, idx, val;
 647   size_t slot;
 648   POP (val);
 649   POP (idx);
 650   POP (instance);
 651   slot = SCM_I_INUM (idx);
 652   SCM_STRUCT_DATA (instance) [slot] = SCM_UNPACK (val);
 653   NEXT;
 654 }
 655
 656 \f
 657 /*
 658  * Bytevectors
 659  */
 660 #define VM_VALIDATE_BYTEVECTOR(x, proc)         \
 661   do                                            \
 662     {                                           \
 663       if (SCM_UNLIKELY (!SCM_BYTEVECTOR_P (x))) \
 664         {                                       \
 665           func_name = proc;                     \
 666           finish_args = x;                      \
 667           goto vm_error_not_a_bytevector;       \
 668         }                                       \
 669     }                                           \
 670   while (0)
 671
 672 #define BV_REF_WITH_ENDIANNESS(stem, fn_stem)                           \
 673 {                                                                       \
 674   SCM endianness;                                                       \
 675   POP (endianness);                                                     \
 676   if (scm_is_eq (endianness, scm_i_native_endianness))                  \
 677     goto VM_LABEL (bv_##stem##_native_ref);                             \
 678   {                                                                     \
 679     ARGS2 (bv, idx);                                                    \
 680     SYNC_REGISTER ();                                                   \
 681     RETURN (scm_bytevector_##fn_stem##_ref (bv, idx, endianness));      \
 682   }                                                                     \
 683 }
 684
 685 /* Return true (non-zero) if PTR has suitable alignment for TYPE.  */
 686 #define ALIGNED_P(ptr, type)                    \
 687   ((scm_t_uintptr) (ptr) % alignof (type) == 0)
 688
 689 VM_DEFINE_FUNCTION (174, bv_u16_ref, "bv-u16-ref", 3)
 690 BV_REF_WITH_ENDIANNESS (u16, u16)
 691 VM_DEFINE_FUNCTION (175, bv_s16_ref, "bv-s16-ref", 3)
 692 BV_REF_WITH_ENDIANNESS (s16, s16)
 693 VM_DEFINE_FUNCTION (176, bv_u32_ref, "bv-u32-ref", 3)
 694 BV_REF_WITH_ENDIANNESS (u32, u32)
 695 VM_DEFINE_FUNCTION (177, bv_s32_ref, "bv-s32-ref", 3)
 696 BV_REF_WITH_ENDIANNESS (s32, s32)
 697 VM_DEFINE_FUNCTION (178, bv_u64_ref, "bv-u64-ref", 3)
 698 BV_REF_WITH_ENDIANNESS (u64, u64)
 699 VM_DEFINE_FUNCTION (179, bv_s64_ref, "bv-s64-ref", 3)
 700 BV_REF_WITH_ENDIANNESS (s64, s64)
 701 VM_DEFINE_FUNCTION (180, bv_f32_ref, "bv-f32-ref", 3)
 702 BV_REF_WITH_ENDIANNESS (f32, ieee_single)
 703 VM_DEFINE_FUNCTION (181, bv_f64_ref, "bv-f64-ref", 3)
 704 BV_REF_WITH_ENDIANNESS (f64, ieee_double)
 705
 706 #undef BV_REF_WITH_ENDIANNESS
 707
 708 #define BV_FIXABLE_INT_REF(stem, fn_stem, type, size)                   \
 709 {                                                                       \
 710   scm_t_signed_bits i;                                                  \
 711   const scm_t_ ## type *int_ptr;                                        \
 712   ARGS2 (bv, idx);                                                      \
 713                                                                         \
 714   VM_VALIDATE_BYTEVECTOR (bv, "bv-" #stem "-ref");                      \
 715   i = SCM_I_INUM (idx);                                                 \
 716   int_ptr = (scm_t_ ## type *) (SCM_BYTEVECTOR_CONTENTS (bv) + i);      \
 717                                                                         \
 718   if (SCM_LIKELY (SCM_I_INUMP (idx)                                     \
 719                   && (i >= 0)                                           \
 720                   && (i + size <= SCM_BYTEVECTOR_LENGTH (bv))           \
 721                   && (ALIGNED_P (int_ptr, scm_t_ ## type))))            \
 722     RETURN (SCM_I_MAKINUM (*int_ptr));                                  \
 723   else                                                                  \
 724     {                                                                   \
 725       SYNC_REGISTER ();                                                 \
 726       RETURN (scm_bytevector_ ## fn_stem ## _ref (bv, idx));            \
 727     }                                                                   \
 728 }
 729
 730 #define BV_INT_REF(stem, type, size)                                    \
 731 {                                                                       \
 732   scm_t_signed_bits i;                                                  \
 733   const scm_t_ ## type *int_ptr;                                        \
 734   ARGS2 (bv, idx);                                                      \
 735                                                                         \
 736   VM_VALIDATE_BYTEVECTOR (bv, "bv-" #stem "-ref");                      \
 737   i = SCM_I_INUM (idx);                                                 \
 738   int_ptr = (scm_t_ ## type *) (SCM_BYTEVECTOR_CONTENTS (bv) + i);      \
 739                                                                         \
 740   if (SCM_LIKELY (SCM_I_INUMP (idx)                                     \
 741                   && (i >= 0)                                           \
 742                   && (i + size <= SCM_BYTEVECTOR_LENGTH (bv))           \
 743                   && (ALIGNED_P (int_ptr, scm_t_ ## type))))            \
 744     {                                                                   \
 745       scm_t_ ## type x = *int_ptr;                                      \
 746       if (SCM_FIXABLE (x))                                              \
 747         RETURN (SCM_I_MAKINUM (x));                                     \
 748       else                                                              \
 749         {                                                               \
 750           SYNC_REGISTER ();                                             \
 751           RETURN (scm_from_ ## type (x));                               \
 752         }                                                               \
 753     }                                                                   \
 754   else                                                                  \
 755     {                                                                   \
 756       SYNC_REGISTER ();                                                 \
 757       RETURN (scm_bytevector_ ## stem ## _native_ref (bv, idx));        \
 758     }                                                                   \
 759 }
 760
 761 #define BV_FLOAT_REF(stem, fn_stem, type, size)                         \
 762 {                                                                       \
 763   scm_t_signed_bits i;                                                  \
 764   const type *float_ptr;                                                \
 765   ARGS2 (bv, idx);                                                      \
 766                                                                         \
 767   VM_VALIDATE_BYTEVECTOR (bv, "bv-" #stem "-ref");                      \
 768   i = SCM_I_INUM (idx);                                                 \
 769   float_ptr = (type *) (SCM_BYTEVECTOR_CONTENTS (bv) + i);              \
 770                                                                         \
 771   SYNC_REGISTER ();                                                     \
 772   if (SCM_LIKELY (SCM_I_INUMP (idx)                                     \
 773                   && (i >= 0)                                           \
 774                   && (i + size <= SCM_BYTEVECTOR_LENGTH (bv))           \
 775                   && (ALIGNED_P (float_ptr, type))))                    \
 776     RETURN (scm_from_double (*float_ptr));                              \
 777   else                                                                  \
 778     RETURN (scm_bytevector_ ## fn_stem ## _native_ref (bv, idx));       \
 779 }
 780
 781 VM_DEFINE_FUNCTION (182, bv_u8_ref, "bv-u8-ref", 2)
 782 BV_FIXABLE_INT_REF (u8, u8, uint8, 1)
 783 VM_DEFINE_FUNCTION (183, bv_s8_ref, "bv-s8-ref", 2)
 784 BV_FIXABLE_INT_REF (s8, s8, int8, 1)
 785 VM_DEFINE_FUNCTION (184, bv_u16_native_ref, "bv-u16-native-ref", 2)
 786 BV_FIXABLE_INT_REF (u16, u16_native, uint16, 2)
 787 VM_DEFINE_FUNCTION (185, bv_s16_native_ref, "bv-s16-native-ref", 2)
 788 BV_FIXABLE_INT_REF (s16, s16_native, int16, 2)
 789 VM_DEFINE_FUNCTION (186, bv_u32_native_ref, "bv-u32-native-ref", 2)
 790 #if SIZEOF_VOID_P > 4
 791 BV_FIXABLE_INT_REF (u32, u32_native, uint32, 4)
 792 #else
 793 BV_INT_REF (u32, uint32, 4)
 794 #endif
 795 VM_DEFINE_FUNCTION (187, bv_s32_native_ref, "bv-s32-native-ref", 2)
 796 #if SIZEOF_VOID_P > 4
 797 BV_FIXABLE_INT_REF (s32, s32_native, int32, 4)
 798 #else
 799 BV_INT_REF (s32, int32, 4)
 800 #endif
 801 VM_DEFINE_FUNCTION (188, bv_u64_native_ref, "bv-u64-native-ref", 2)
 802 BV_INT_REF (u64, uint64, 8)
 803 VM_DEFINE_FUNCTION (189, bv_s64_native_ref, "bv-s64-native-ref", 2)
 804 BV_INT_REF (s64, int64, 8)
 805 VM_DEFINE_FUNCTION (190, bv_f32_native_ref, "bv-f32-native-ref", 2)
 806 BV_FLOAT_REF (f32, ieee_single, float, 4)
 807 VM_DEFINE_FUNCTION (191, bv_f64_native_ref, "bv-f64-native-ref", 2)
 808 BV_FLOAT_REF (f64, ieee_double, double, 8)
 809
 810 #undef BV_FIXABLE_INT_REF
 811 #undef BV_INT_REF
 812 #undef BV_FLOAT_REF
 813
 814
 815
 816 #define BV_SET_WITH_ENDIANNESS(stem, fn_stem)                           \
 817 {                                                                       \
 818   SCM endianness;                                                       \
 819   POP (endianness);                                                     \
 820   if (scm_is_eq (endianness, scm_i_native_endianness))                  \
 821     goto VM_LABEL (bv_##stem##_native_set);                             \
 822   {                                                                     \
 823     SCM bv, idx, val; POP (val); POP (idx); POP (bv);                   \
 824     SYNC_REGISTER ();                                                   \
 825     scm_bytevector_##fn_stem##_set_x (bv, idx, val, endianness);        \
 826     NEXT;                                                               \
 827   }                                                                     \
 828 }
 829
 830 VM_DEFINE_INSTRUCTION (192, bv_u16_set, "bv-u16-set", 0, 4, 0)
 831 BV_SET_WITH_ENDIANNESS (u16, u16)
 832 VM_DEFINE_INSTRUCTION (193, bv_s16_set, "bv-s16-set", 0, 4, 0)
 833 BV_SET_WITH_ENDIANNESS (s16, s16)
 834 VM_DEFINE_INSTRUCTION (194, bv_u32_set, "bv-u32-set", 0, 4, 0)
 835 BV_SET_WITH_ENDIANNESS (u32, u32)
 836 VM_DEFINE_INSTRUCTION (195, bv_s32_set, "bv-s32-set", 0, 4, 0)
 837 BV_SET_WITH_ENDIANNESS (s32, s32)
 838 VM_DEFINE_INSTRUCTION (196, bv_u64_set, "bv-u64-set", 0, 4, 0)
 839 BV_SET_WITH_ENDIANNESS (u64, u64)
 840 VM_DEFINE_INSTRUCTION (197, bv_s64_set, "bv-s64-set", 0, 4, 0)
 841 BV_SET_WITH_ENDIANNESS (s64, s64)
 842 VM_DEFINE_INSTRUCTION (198, bv_f32_set, "bv-f32-set", 0, 4, 0)
 843 BV_SET_WITH_ENDIANNESS (f32, ieee_single)
 844 VM_DEFINE_INSTRUCTION (199, bv_f64_set, "bv-f64-set", 0, 4, 0)
 845 BV_SET_WITH_ENDIANNESS (f64, ieee_double)
 846
 847 #undef BV_SET_WITH_ENDIANNESS
 848
 849 #define BV_FIXABLE_INT_SET(stem, fn_stem, type, min, max, size)         \
 850 {                                                                       \
 851   scm_t_signed_bits i, j = 0;                                           \
 852   SCM bv, idx, val;                                                     \
 853   scm_t_ ## type *int_ptr;                                              \
 854                                                                         \
 855   POP (val); POP (idx); POP (bv);                                       \
 856   VM_VALIDATE_BYTEVECTOR (bv, "bv-" #stem "-set");                      \
 857   i = SCM_I_INUM (idx);                                                 \
 858   int_ptr = (scm_t_ ## type *) (SCM_BYTEVECTOR_CONTENTS (bv) + i);      \
 859                                                                         \
 860   if (SCM_LIKELY (SCM_I_INUMP (idx)                                     \
 861                   && (i >= 0)                                           \
 862                   && (i + size <= SCM_BYTEVECTOR_LENGTH (bv))           \
 863                   && (ALIGNED_P (int_ptr, scm_t_ ## type))              \
 864                   && (SCM_I_INUMP (val))                                \
 865                   && ((j = SCM_I_INUM (val)) >= min)                    \
 866                   && (j <= max)))                                       \
 867     *int_ptr = (scm_t_ ## type) j;                                      \
 868   else                                                                  \
 869     {                                                                   \
 870       SYNC_REGISTER ();                                                 \
 871       scm_bytevector_ ## fn_stem ## _set_x (bv, idx, val);              \
 872     }                                                                   \
 873   NEXT;                                                                 \
 874 }
 875
 876 #define BV_INT_SET(stem, type, size)                                    \
 877 {                                                                       \
 878   scm_t_signed_bits i = 0;                                              \
 879   SCM bv, idx, val;                                                     \
 880   scm_t_ ## type *int_ptr;                                              \
 881                                                                         \
 882   POP (val); POP (idx); POP (bv);                                       \
 883   VM_VALIDATE_BYTEVECTOR (bv, "bv-" #stem "-set");                      \
 884   i = SCM_I_INUM (idx);                                                 \
 885   int_ptr = (scm_t_ ## type *) (SCM_BYTEVECTOR_CONTENTS (bv) + i);      \
 886                                                                         \
 887   if (SCM_LIKELY (SCM_I_INUMP (idx)                                     \
 888                   && (i >= 0)                                           \
 889                   && (i + size <= SCM_BYTEVECTOR_LENGTH (bv))           \
 890                   && (ALIGNED_P (int_ptr, scm_t_ ## type))))            \
 891     *int_ptr = scm_to_ ## type (val);                                   \
 892   else                                                                  \
 893     {                                                                   \
 894       SYNC_REGISTER ();                                                 \
 895       scm_bytevector_ ## stem ## _native_set_x (bv, idx, val);          \
 896     }                                                                   \
 897   NEXT;                                                                 \
 898 }
 899
 900 #define BV_FLOAT_SET(stem, fn_stem, type, size)                         \
 901 {                                                                       \
 902   scm_t_signed_bits i = 0;                                              \
 903   SCM bv, idx, val;                                                     \
 904   type *float_ptr;                                                      \
 905                                                                         \
 906   POP (val); POP (idx); POP (bv);                                       \
 907   VM_VALIDATE_BYTEVECTOR (bv, "bv-" #stem "-set");                      \
 908   i = SCM_I_INUM (idx);                                                 \
 909   float_ptr = (type *) (SCM_BYTEVECTOR_CONTENTS (bv) + i);              \
 910                                                                         \
 911   if (SCM_LIKELY (SCM_I_INUMP (idx)                                     \
 912                   && (i >= 0)                                           \
 913                   && (i + size <= SCM_BYTEVECTOR_LENGTH (bv))           \
 914                   && (ALIGNED_P (float_ptr, type))))                    \
 915     *float_ptr = scm_to_double (val);                                   \
 916   else                                                                  \
 917     {                                                                   \
 918       SYNC_REGISTER ();                                                 \
 919       scm_bytevector_ ## fn_stem ## _native_set_x (bv, idx, val);       \
 920     }                                                                   \
 921   NEXT;                                                                 \
 922 }
 923
 924 VM_DEFINE_INSTRUCTION (200, bv_u8_set, "bv-u8-set", 0, 3, 0)
 925 BV_FIXABLE_INT_SET (u8, u8, uint8, 0, SCM_T_UINT8_MAX, 1)
 926 VM_DEFINE_INSTRUCTION (201, bv_s8_set, "bv-s8-set", 0, 3, 0)
 927 BV_FIXABLE_INT_SET (s8, s8, int8, SCM_T_INT8_MIN, SCM_T_INT8_MAX, 1)
 928 VM_DEFINE_INSTRUCTION (202, bv_u16_native_set, "bv-u16-native-set", 0, 3, 0)
 929 BV_FIXABLE_INT_SET (u16, u16_native, uint16, 0, SCM_T_UINT16_MAX, 2)
 930 VM_DEFINE_INSTRUCTION (203, bv_s16_native_set, "bv-s16-native-set", 0, 3, 0)
 931 BV_FIXABLE_INT_SET (s16, s16_native, int16, SCM_T_INT16_MIN, SCM_T_INT16_MAX, 2)
 932 VM_DEFINE_INSTRUCTION (204, bv_u32_native_set, "bv-u32-native-set", 0, 3, 0)
 933 #if SIZEOF_VOID_P > 4
 934 BV_FIXABLE_INT_SET (u32, u32_native, uint32, 0, SCM_T_UINT32_MAX, 4)
 935 #else
 936 BV_INT_SET (u32, uint32, 4)
 937 #endif
 938 VM_DEFINE_INSTRUCTION (205, bv_s32_native_set, "bv-s32-native-set", 0, 3, 0)
 939 #if SIZEOF_VOID_P > 4
 940 BV_FIXABLE_INT_SET (s32, s32_native, int32, SCM_T_INT32_MIN, SCM_T_INT32_MAX, 4)
 941 #else
 942 BV_INT_SET (s32, int32, 4)
 943 #endif
 944 VM_DEFINE_INSTRUCTION (206, bv_u64_native_set, "bv-u64-native-set", 0, 3, 0)
 945 BV_INT_SET (u64, uint64, 8)
 946 VM_DEFINE_INSTRUCTION (207, bv_s64_native_set, "bv-s64-native-set", 0, 3, 0)
 947 BV_INT_SET (s64, int64, 8)
 948 VM_DEFINE_INSTRUCTION (208, bv_f32_native_set, "bv-f32-native-set", 0, 3, 0)
 949 BV_FLOAT_SET (f32, ieee_single, float, 4)
 950 VM_DEFINE_INSTRUCTION (209, bv_f64_native_set, "bv-f64-native-set", 0, 3, 0)
 951 BV_FLOAT_SET (f64, ieee_double, double, 8)
 952
 953 #undef BV_FIXABLE_INT_SET
 954 #undef BV_INT_SET
 955 #undef BV_FLOAT_SET
 956
 957 /*
 958 (defun renumber-ops ()
 959   "start from top of buffer and renumber 'VM_DEFINE_FOO (\n' sequences"
 960   (interactive "")
 961   (save-excursion
 962     (let ((counter 127)) (goto-char (point-min))
 963       (while (re-search-forward "^VM_DEFINE_[^ ]+ (\\([^,]+\\)," (point-max) t)
 964         (replace-match
 965          (number-to-string (setq counter (1+ counter)))
 966           t t nil 1)))))
 967 */
 968
 969 /*
 970   Local Variables:
 971   c-file-style: "gnu"
 972   End:
 973 */