libguile/vm-i-scheme.c

   1 /* Copyright (C) 2001, 2009, 2010, 2011, 2012, 2013 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   VM_ASSERT (scm_is_pair (x), vm_error_not_a_pair (proc, x))
 128
 129 VM_DEFINE_FUNCTION (141, car, "car", 1)
 130 {
 131   ARGS1 (x);
 132   VM_VALIDATE_CONS (x, "car");
 133   RETURN (SCM_CAR (x));
 134 }
 135
 136 VM_DEFINE_FUNCTION (142, cdr, "cdr", 1)
 137 {
 138   ARGS1 (x);
 139   VM_VALIDATE_CONS (x, "cdr");
 140   RETURN (SCM_CDR (x));
 141 }
 142
 143 VM_DEFINE_INSTRUCTION (143, set_car, "set-car!", 0, 2, 0)
 144 {
 145   SCM x, y;
 146   POP2 (y, x);
 147   VM_VALIDATE_CONS (x, "set-car!");
 148   SCM_SETCAR (x, y);
 149   NEXT;
 150 }
 151
 152 VM_DEFINE_INSTRUCTION (144, set_cdr, "set-cdr!", 0, 2, 0)
 153 {
 154   SCM x, y;
 155   POP2 (y, x);
 156   VM_VALIDATE_CONS (x, "set-cdr!");
 157   SCM_SETCDR (x, y);
 158   NEXT;
 159 }
 160
 161 \f
 162 /*
 163  * Numeric relational tests
 164  */
 165
 166 #undef REL
 167 #define REL(crel,srel)                                                  \
 168   {                                                                     \
 169     ARGS2 (x, y);                                                       \
 170     if (SCM_I_INUMP (x) && SCM_I_INUMP (y))                             \
 171       RETURN (scm_from_bool (((scm_t_signed_bits) SCM_UNPACK (x))       \
 172                              crel ((scm_t_signed_bits) SCM_UNPACK (y)))); \
 173     SYNC_REGISTER ();                                                   \
 174     RETURN (srel (x, y));                                               \
 175   }
 176
 177 VM_DEFINE_FUNCTION (145, ee, "ee?", 2)
 178 {
 179   REL (==, scm_num_eq_p);
 180 }
 181
 182 VM_DEFINE_FUNCTION (146, lt, "lt?", 2)
 183 {
 184   REL (<, scm_less_p);
 185 }
 186
 187 VM_DEFINE_FUNCTION (147, le, "le?", 2)
 188 {
 189   REL (<=, scm_leq_p);
 190 }
 191
 192 VM_DEFINE_FUNCTION (148, gt, "gt?", 2)
 193 {
 194   REL (>, scm_gr_p);
 195 }
 196
 197 VM_DEFINE_FUNCTION (149, ge, "ge?", 2)
 198 {
 199   REL (>=, scm_geq_p);
 200 }
 201
 202 \f
 203 /*
 204  * Numeric functions
 205  */
 206
 207 /* The maximum/minimum tagged integers.  */
 208 #undef INUM_MAX
 209 #undef INUM_MIN
 210 #undef INUM_STEP
 211 #define INUM_MAX  \
 212   ((scm_t_signed_bits) SCM_UNPACK (SCM_I_MAKINUM (SCM_MOST_POSITIVE_FIXNUM)))
 213 #define INUM_MIN  \
 214   ((scm_t_signed_bits) SCM_UNPACK (SCM_I_MAKINUM (SCM_MOST_NEGATIVE_FIXNUM)))
 215 #define INUM_STEP                                \
 216   ((scm_t_signed_bits) SCM_UNPACK (SCM_INUM1)    \
 217    - (scm_t_signed_bits) SCM_UNPACK (SCM_INUM0))
 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                          "sub %[tag], %%rcx; "                          \
 252                          "add %0, %%rcx;     jo %l[slow_add]; "         \
 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", "cc"                        \
 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", "cc"                        \
 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.  We must avoid overflow in the signed
 302      addition below, even if X is not an inum.  */
 303   if (SCM_LIKELY ((scm_t_signed_bits) SCM_UNPACK (x) <= INUM_MAX - INUM_STEP))
 304     {
 305       SCM result;
 306
 307       /* Add 1 to the integer without untagging.  */
 308       result = SCM_PACK ((scm_t_signed_bits) SCM_UNPACK (x) + INUM_STEP);
 309
 310       if (SCM_LIKELY (SCM_I_INUMP (result)))
 311         RETURN (result);
 312     }
 313
 314   SYNC_REGISTER ();
 315   RETURN (scm_sum (x, SCM_I_MAKINUM (1)));
 316 }
 317
 318 VM_DEFINE_FUNCTION (152, sub, "sub", 2)
 319 {
 320 #ifndef ASM_SUB
 321   FUNC2 (-, scm_difference);
 322 #else
 323   ARGS2 (x, y);
 324   ASM_SUB (x, y);
 325   SYNC_REGISTER ();
 326   RETURN (scm_difference (x, y));
 327 #endif
 328 }
 329
 330 VM_DEFINE_FUNCTION (153, sub1, "sub1", 1)
 331 {
 332   ARGS1 (x);
 333
 334   /* Check for overflow.  We must avoid overflow in the signed
 335      subtraction below, even if X is not an inum.  */
 336   if (SCM_LIKELY ((scm_t_signed_bits) SCM_UNPACK (x) >= INUM_MIN + INUM_STEP))
 337     {
 338       SCM result;
 339
 340       /* Substract 1 from the integer without untagging.  */
 341       result = SCM_PACK ((scm_t_signed_bits) SCM_UNPACK (x) - INUM_STEP);
 342
 343       if (SCM_LIKELY (SCM_I_INUMP (result)))
 344         RETURN (result);
 345     }
 346
 347   SYNC_REGISTER ();
 348   RETURN (scm_difference (x, SCM_I_MAKINUM (1)));
 349 }
 350
 351 # undef ASM_ADD
 352 # undef ASM_SUB
 353
 354 VM_DEFINE_FUNCTION (154, mul, "mul", 2)
 355 {
 356   ARGS2 (x, y);
 357   SYNC_REGISTER ();
 358   RETURN (scm_product (x, y));
 359 }
 360
 361 VM_DEFINE_FUNCTION (155, div, "div", 2)
 362 {
 363   ARGS2 (x, y);
 364   SYNC_REGISTER ();
 365   RETURN (scm_divide (x, y));
 366 }
 367
 368 VM_DEFINE_FUNCTION (156, quo, "quo", 2)
 369 {
 370   ARGS2 (x, y);
 371   SYNC_REGISTER ();
 372   RETURN (scm_quotient (x, y));
 373 }
 374
 375 VM_DEFINE_FUNCTION (157, rem, "rem", 2)
 376 {
 377   ARGS2 (x, y);
 378   SYNC_REGISTER ();
 379   RETURN (scm_remainder (x, y));
 380 }
 381
 382 VM_DEFINE_FUNCTION (158, mod, "mod", 2)
 383 {
 384   ARGS2 (x, y);
 385   SYNC_REGISTER ();
 386   RETURN (scm_modulo (x, y));
 387 }
 388
 389 VM_DEFINE_FUNCTION (159, ash, "ash", 2)
 390 {
 391   ARGS2 (x, y);
 392   if (SCM_I_INUMP (x) && SCM_I_INUMP (y))
 393     {
 394       if (SCM_I_INUM (y) < 0)
 395         {
 396           /* Right shift, will be a fixnum. */
 397           if (SCM_I_INUM (y) > -SCM_I_FIXNUM_BIT)
 398             RETURN (SCM_I_MAKINUM (SCM_I_INUM (x) >> -SCM_I_INUM (y)));
 399           /* fall through */
 400         }
 401       else
 402         /* Left shift. See comments in scm_ash. */
 403         {
 404           scm_t_signed_bits nn, bits_to_shift;
 405
 406           nn = SCM_I_INUM (x);
 407           bits_to_shift = SCM_I_INUM (y);
 408
 409           if (bits_to_shift < SCM_I_FIXNUM_BIT-1
 410               && ((scm_t_bits)
 411                   (SCM_SRS (nn, (SCM_I_FIXNUM_BIT-1 - bits_to_shift)) + 1)
 412                   <= 1))
 413             RETURN (SCM_I_MAKINUM (nn << bits_to_shift));
 414           /* fall through */
 415         }
 416       /* fall through */
 417     }
 418   SYNC_REGISTER ();
 419   RETURN (scm_ash (x, y));
 420 }
 421
 422 VM_DEFINE_FUNCTION (160, logand, "logand", 2)
 423 {
 424   ARGS2 (x, y);
 425   if (SCM_I_INUMP (x) && SCM_I_INUMP (y))
 426     RETURN (SCM_I_MAKINUM (SCM_I_INUM (x) & SCM_I_INUM (y)));
 427   SYNC_REGISTER ();
 428   RETURN (scm_logand (x, y));
 429 }
 430
 431 VM_DEFINE_FUNCTION (161, logior, "logior", 2)
 432 {
 433   ARGS2 (x, y);
 434   if (SCM_I_INUMP (x) && SCM_I_INUMP (y))
 435     RETURN (SCM_I_MAKINUM (SCM_I_INUM (x) | SCM_I_INUM (y)));
 436   SYNC_REGISTER ();
 437   RETURN (scm_logior (x, y));
 438 }
 439
 440 VM_DEFINE_FUNCTION (162, logxor, "logxor", 2)
 441 {
 442   ARGS2 (x, y);
 443   if (SCM_I_INUMP (x) && SCM_I_INUMP (y))
 444     RETURN (SCM_I_MAKINUM (SCM_I_INUM (x) ^ SCM_I_INUM (y)));
 445   SYNC_REGISTER ();
 446   RETURN (scm_logxor (x, y));
 447 }
 448
 449 \f
 450 /*
 451  * Vectors and arrays
 452  */
 453
 454 VM_DEFINE_FUNCTION (163, vector_ref, "vector-ref", 2)
 455 {
 456   scm_t_signed_bits i = 0;
 457   ARGS2 (vect, idx);
 458   if (SCM_LIKELY (SCM_I_IS_NONWEAK_VECTOR (vect)
 459                   && SCM_I_INUMP (idx)
 460                   && ((i = SCM_I_INUM (idx)) >= 0)
 461                   && i < SCM_I_VECTOR_LENGTH (vect)))
 462     RETURN (SCM_I_VECTOR_ELTS (vect)[i]);
 463   else
 464     {
 465       SYNC_REGISTER ();
 466       RETURN (scm_vector_ref (vect, idx));
 467     }
 468 }
 469
 470 VM_DEFINE_INSTRUCTION (164, vector_set, "vector-set", 0, 3, 0)
 471 {
 472   scm_t_signed_bits i = 0;
 473   SCM vect, idx, val;
 474   POP3 (val, idx, vect);
 475   if (SCM_LIKELY (SCM_I_IS_NONWEAK_VECTOR (vect)
 476                   && SCM_I_INUMP (idx)
 477                   && ((i = SCM_I_INUM (idx)) >= 0)
 478                   && i < SCM_I_VECTOR_LENGTH (vect)))
 479     SCM_I_VECTOR_WELTS (vect)[i] = val;
 480   else
 481     {
 482       SYNC_REGISTER ();
 483       scm_vector_set_x (vect, idx, val);
 484     }
 485   NEXT;
 486 }
 487
 488 VM_DEFINE_INSTRUCTION (165, make_array, "make-array", 3, -1, 1)
 489 {
 490   scm_t_uint32 len;
 491   SCM shape, ret;
 492
 493   len = FETCH ();
 494   len = (len << 8) + FETCH ();
 495   len = (len << 8) + FETCH ();
 496   POP (shape);
 497   SYNC_REGISTER ();
 498   PRE_CHECK_UNDERFLOW (len);
 499   ret = scm_from_contiguous_array (shape, sp - len + 1, len);
 500   DROPN (len);
 501   PUSH (ret);
 502   NEXT;
 503 }
 504
 505 \f
 506 /*
 507  * Structs
 508  */
 509 #define VM_VALIDATE_STRUCT(obj, proc)           \
 510   VM_ASSERT (SCM_STRUCTP (obj), vm_error_not_a_struct (proc, obj))
 511
 512 VM_DEFINE_FUNCTION (166, struct_p, "struct?", 1)
 513 {
 514   ARGS1 (obj);
 515   RETURN (scm_from_bool (SCM_STRUCTP (obj)));
 516 }
 517
 518 VM_DEFINE_FUNCTION (167, struct_vtable, "struct-vtable", 1)
 519 {
 520   ARGS1 (obj);
 521   VM_VALIDATE_STRUCT (obj, "struct_vtable");
 522   RETURN (SCM_STRUCT_VTABLE (obj));
 523 }
 524
 525 VM_DEFINE_INSTRUCTION (168, make_struct, "make-struct", 2, -1, 1)
 526 {
 527   unsigned h = FETCH ();
 528   unsigned l = FETCH ();
 529   scm_t_bits n = ((h << 8U) + l);
 530   SCM vtable = sp[-(n - 1)];
 531   const SCM *inits = sp - n + 2;
 532   SCM ret;
 533
 534   SYNC_REGISTER ();
 535
 536   if (SCM_LIKELY (SCM_STRUCTP (vtable)
 537                   && SCM_VTABLE_FLAG_IS_SET (vtable, SCM_VTABLE_FLAG_SIMPLE)
 538                   && (SCM_STRUCT_DATA_REF (vtable, scm_vtable_index_size) + 1
 539                       == n)
 540                   && !SCM_VTABLE_INSTANCE_FINALIZER (vtable)))
 541     {
 542       /* Verily, we are making a simple struct with the right number of
 543          initializers, and no finalizer. */
 544       ret = scm_words ((scm_t_bits)SCM_STRUCT_DATA (vtable) | scm_tc3_struct,
 545                        n + 1);
 546       SCM_SET_CELL_WORD_1 (ret, (scm_t_bits)SCM_CELL_OBJECT_LOC (ret, 2));
 547       memcpy (SCM_STRUCT_DATA (ret), inits, (n - 1) * sizeof (SCM));
 548     }
 549   else
 550     ret = scm_c_make_structv (vtable, 0, n - 1, (scm_t_bits *) inits);
 551
 552   DROPN (n);
 553   PUSH (ret);
 554
 555   NEXT;
 556 }
 557
 558 VM_DEFINE_FUNCTION (169, struct_ref, "struct-ref", 2)
 559 {
 560   ARGS2 (obj, pos);
 561
 562   if (SCM_LIKELY (SCM_STRUCTP (obj)
 563                   && SCM_STRUCT_VTABLE_FLAG_IS_SET (obj,
 564                                                     SCM_VTABLE_FLAG_SIMPLE)
 565                   && SCM_I_INUMP (pos)))
 566     {
 567       SCM vtable;
 568       scm_t_bits index, len;
 569
 570       /* True, an inum is a signed value, but cast to unsigned it will
 571          certainly be more than the length, so we will fall through if
 572          index is negative. */
 573       index = SCM_I_INUM (pos);
 574       vtable = SCM_STRUCT_VTABLE (obj);
 575       len = SCM_STRUCT_DATA_REF (vtable, scm_vtable_index_size);
 576
 577       if (SCM_LIKELY (index < len))
 578         {
 579           scm_t_bits *data = SCM_STRUCT_DATA (obj);
 580           RETURN (SCM_PACK (data[index]));
 581         }
 582     }
 583
 584   SYNC_REGISTER ();
 585   RETURN (scm_struct_ref (obj, pos));
 586 }
 587
 588 VM_DEFINE_FUNCTION (170, struct_set, "struct-set", 3)
 589 {
 590   ARGS3 (obj, pos, val);
 591
 592   if (SCM_LIKELY (SCM_STRUCTP (obj)
 593                   && SCM_STRUCT_VTABLE_FLAG_IS_SET (obj,
 594                                                     SCM_VTABLE_FLAG_SIMPLE)
 595                   && SCM_STRUCT_VTABLE_FLAG_IS_SET (obj,
 596                                                     SCM_VTABLE_FLAG_SIMPLE_RW)
 597                   && SCM_I_INUMP (pos)))
 598     {
 599       SCM vtable;
 600       scm_t_bits index, len;
 601
 602       /* See above regarding index being >= 0. */
 603       index = SCM_I_INUM (pos);
 604       vtable = SCM_STRUCT_VTABLE (obj);
 605       len = SCM_STRUCT_DATA_REF (vtable, scm_vtable_index_size);
 606       if (SCM_LIKELY (index < len))
 607         {
 608           scm_t_bits *data = SCM_STRUCT_DATA (obj);
 609           data[index] = SCM_UNPACK (val);
 610           RETURN (val);
 611         }
 612     }
 613
 614   SYNC_REGISTER ();
 615   RETURN (scm_struct_set_x (obj, pos, val));
 616 }
 617
 618 \f
 619 /*
 620  * GOOPS support
 621  */
 622 VM_DEFINE_FUNCTION (171, class_of, "class-of", 1)
 623 {
 624   ARGS1 (obj);
 625   if (SCM_INSTANCEP (obj))
 626     RETURN (SCM_CLASS_OF (obj));
 627   SYNC_REGISTER ();
 628   RETURN (scm_class_of (obj));
 629 }
 630
 631 /* FIXME: No checking whatsoever. */
 632 VM_DEFINE_FUNCTION (172, slot_ref, "slot-ref", 2)
 633 {
 634   size_t slot;
 635   ARGS2 (instance, idx);
 636   slot = SCM_I_INUM (idx);
 637   RETURN (SCM_PACK (SCM_STRUCT_DATA (instance) [slot]));
 638 }
 639
 640 /* FIXME: No checking whatsoever. */
 641 VM_DEFINE_INSTRUCTION (173, slot_set, "slot-set", 0, 3, 0)
 642 {
 643   SCM instance, idx, val;
 644   size_t slot;
 645   POP3 (val, idx, instance);
 646   slot = SCM_I_INUM (idx);
 647   SCM_STRUCT_DATA (instance) [slot] = SCM_UNPACK (val);
 648   NEXT;
 649 }
 650
 651 \f
 652 /*
 653  * Bytevectors
 654  */
 655 #define VM_VALIDATE_BYTEVECTOR(x, proc)         \
 656   VM_ASSERT (SCM_BYTEVECTOR_P (x), vm_error_not_a_bytevector (proc, x))
 657
 658 #define BV_REF_WITH_ENDIANNESS(stem, fn_stem)                           \
 659 {                                                                       \
 660   SCM endianness;                                                       \
 661   POP (endianness);                                                     \
 662   if (scm_is_eq (endianness, scm_i_native_endianness))                  \
 663     goto VM_LABEL (bv_##stem##_native_ref);                             \
 664   {                                                                     \
 665     ARGS2 (bv, idx);                                                    \
 666     SYNC_REGISTER ();                                                   \
 667     RETURN (scm_bytevector_##fn_stem##_ref (bv, idx, endianness));      \
 668   }                                                                     \
 669 }
 670
 671 /* Return true (non-zero) if PTR has suitable alignment for TYPE.  */
 672 #define ALIGNED_P(ptr, type)                    \
 673   ((scm_t_uintptr) (ptr) % alignof_type (type) == 0)
 674
 675 VM_DEFINE_FUNCTION (174, bv_u16_ref, "bv-u16-ref", 3)
 676 BV_REF_WITH_ENDIANNESS (u16, u16)
 677 VM_DEFINE_FUNCTION (175, bv_s16_ref, "bv-s16-ref", 3)
 678 BV_REF_WITH_ENDIANNESS (s16, s16)
 679 VM_DEFINE_FUNCTION (176, bv_u32_ref, "bv-u32-ref", 3)
 680 BV_REF_WITH_ENDIANNESS (u32, u32)
 681 VM_DEFINE_FUNCTION (177, bv_s32_ref, "bv-s32-ref", 3)
 682 BV_REF_WITH_ENDIANNESS (s32, s32)
 683 VM_DEFINE_FUNCTION (178, bv_u64_ref, "bv-u64-ref", 3)
 684 BV_REF_WITH_ENDIANNESS (u64, u64)
 685 VM_DEFINE_FUNCTION (179, bv_s64_ref, "bv-s64-ref", 3)
 686 BV_REF_WITH_ENDIANNESS (s64, s64)
 687 VM_DEFINE_FUNCTION (180, bv_f32_ref, "bv-f32-ref", 3)
 688 BV_REF_WITH_ENDIANNESS (f32, ieee_single)
 689 VM_DEFINE_FUNCTION (181, bv_f64_ref, "bv-f64-ref", 3)
 690 BV_REF_WITH_ENDIANNESS (f64, ieee_double)
 691
 692 #undef BV_REF_WITH_ENDIANNESS
 693
 694 #define BV_FIXABLE_INT_REF(stem, fn_stem, type, size)                   \
 695 {                                                                       \
 696   scm_t_signed_bits i;                                                  \
 697   const scm_t_ ## type *int_ptr;                                        \
 698   ARGS2 (bv, idx);                                                      \
 699                                                                         \
 700   VM_VALIDATE_BYTEVECTOR (bv, "bv-" #stem "-ref");                      \
 701   i = SCM_I_INUM (idx);                                                 \
 702   int_ptr = (scm_t_ ## type *) (SCM_BYTEVECTOR_CONTENTS (bv) + i);      \
 703                                                                         \
 704   if (SCM_LIKELY (SCM_I_INUMP (idx)                                     \
 705                   && (i >= 0)                                           \
 706                   && (i + size <= SCM_BYTEVECTOR_LENGTH (bv))           \
 707                   && (ALIGNED_P (int_ptr, scm_t_ ## type))))            \
 708     RETURN (SCM_I_MAKINUM (*int_ptr));                                  \
 709   else                                                                  \
 710     {                                                                   \
 711       SYNC_REGISTER ();                                                 \
 712       RETURN (scm_bytevector_ ## fn_stem ## _ref (bv, idx));            \
 713     }                                                                   \
 714 }
 715
 716 #define BV_INT_REF(stem, type, size)                                    \
 717 {                                                                       \
 718   scm_t_signed_bits i;                                                  \
 719   const scm_t_ ## type *int_ptr;                                        \
 720   ARGS2 (bv, idx);                                                      \
 721                                                                         \
 722   VM_VALIDATE_BYTEVECTOR (bv, "bv-" #stem "-ref");                      \
 723   i = SCM_I_INUM (idx);                                                 \
 724   int_ptr = (scm_t_ ## type *) (SCM_BYTEVECTOR_CONTENTS (bv) + i);      \
 725                                                                         \
 726   if (SCM_LIKELY (SCM_I_INUMP (idx)                                     \
 727                   && (i >= 0)                                           \
 728                   && (i + size <= SCM_BYTEVECTOR_LENGTH (bv))           \
 729                   && (ALIGNED_P (int_ptr, scm_t_ ## type))))            \
 730     {                                                                   \
 731       scm_t_ ## type x = *int_ptr;                                      \
 732       if (SCM_FIXABLE (x))                                              \
 733         RETURN (SCM_I_MAKINUM (x));                                     \
 734       else                                                              \
 735         {                                                               \
 736           SYNC_REGISTER ();                                             \
 737           RETURN (scm_from_ ## type (x));                               \
 738         }                                                               \
 739     }                                                                   \
 740   else                                                                  \
 741     {                                                                   \
 742       SYNC_REGISTER ();                                                 \
 743       RETURN (scm_bytevector_ ## stem ## _native_ref (bv, idx));        \
 744     }                                                                   \
 745 }
 746
 747 #define BV_FLOAT_REF(stem, fn_stem, type, size)                         \
 748 {                                                                       \
 749   scm_t_signed_bits i;                                                  \
 750   const type *float_ptr;                                                \
 751   ARGS2 (bv, idx);                                                      \
 752                                                                         \
 753   VM_VALIDATE_BYTEVECTOR (bv, "bv-" #stem "-ref");                      \
 754   i = SCM_I_INUM (idx);                                                 \
 755   float_ptr = (type *) (SCM_BYTEVECTOR_CONTENTS (bv) + i);              \
 756                                                                         \
 757   SYNC_REGISTER ();                                                     \
 758   if (SCM_LIKELY (SCM_I_INUMP (idx)                                     \
 759                   && (i >= 0)                                           \
 760                   && (i + size <= SCM_BYTEVECTOR_LENGTH (bv))           \
 761                   && (ALIGNED_P (float_ptr, type))))                    \
 762     RETURN (scm_from_double (*float_ptr));                              \
 763   else                                                                  \
 764     RETURN (scm_bytevector_ ## fn_stem ## _native_ref (bv, idx));       \
 765 }
 766
 767 VM_DEFINE_FUNCTION (182, bv_u8_ref, "bv-u8-ref", 2)
 768 BV_FIXABLE_INT_REF (u8, u8, uint8, 1)
 769 VM_DEFINE_FUNCTION (183, bv_s8_ref, "bv-s8-ref", 2)
 770 BV_FIXABLE_INT_REF (s8, s8, int8, 1)
 771 VM_DEFINE_FUNCTION (184, bv_u16_native_ref, "bv-u16-native-ref", 2)
 772 BV_FIXABLE_INT_REF (u16, u16_native, uint16, 2)
 773 VM_DEFINE_FUNCTION (185, bv_s16_native_ref, "bv-s16-native-ref", 2)
 774 BV_FIXABLE_INT_REF (s16, s16_native, int16, 2)
 775 VM_DEFINE_FUNCTION (186, bv_u32_native_ref, "bv-u32-native-ref", 2)
 776 #if SIZEOF_VOID_P > 4
 777 BV_FIXABLE_INT_REF (u32, u32_native, uint32, 4)
 778 #else
 779 BV_INT_REF (u32, uint32, 4)
 780 #endif
 781 VM_DEFINE_FUNCTION (187, bv_s32_native_ref, "bv-s32-native-ref", 2)
 782 #if SIZEOF_VOID_P > 4
 783 BV_FIXABLE_INT_REF (s32, s32_native, int32, 4)
 784 #else
 785 BV_INT_REF (s32, int32, 4)
 786 #endif
 787 VM_DEFINE_FUNCTION (188, bv_u64_native_ref, "bv-u64-native-ref", 2)
 788 BV_INT_REF (u64, uint64, 8)
 789 VM_DEFINE_FUNCTION (189, bv_s64_native_ref, "bv-s64-native-ref", 2)
 790 BV_INT_REF (s64, int64, 8)
 791 VM_DEFINE_FUNCTION (190, bv_f32_native_ref, "bv-f32-native-ref", 2)
 792 BV_FLOAT_REF (f32, ieee_single, float, 4)
 793 VM_DEFINE_FUNCTION (191, bv_f64_native_ref, "bv-f64-native-ref", 2)
 794 BV_FLOAT_REF (f64, ieee_double, double, 8)
 795
 796 #undef BV_FIXABLE_INT_REF
 797 #undef BV_INT_REF
 798 #undef BV_FLOAT_REF
 799
 800
 801
 802 #define BV_SET_WITH_ENDIANNESS(stem, fn_stem)                           \
 803 {                                                                       \
 804   SCM endianness;                                                       \
 805   POP (endianness);                                                     \
 806   if (scm_is_eq (endianness, scm_i_native_endianness))                  \
 807     goto VM_LABEL (bv_##stem##_native_set);                             \
 808   {                                                                     \
 809     SCM bv, idx, val; POP3 (val, idx, bv);                              \
 810     SYNC_REGISTER ();                                                   \
 811     scm_bytevector_##fn_stem##_set_x (bv, idx, val, endianness);        \
 812     NEXT;                                                               \
 813   }                                                                     \
 814 }
 815
 816 VM_DEFINE_INSTRUCTION (192, bv_u16_set, "bv-u16-set", 0, 4, 0)
 817 BV_SET_WITH_ENDIANNESS (u16, u16)
 818 VM_DEFINE_INSTRUCTION (193, bv_s16_set, "bv-s16-set", 0, 4, 0)
 819 BV_SET_WITH_ENDIANNESS (s16, s16)
 820 VM_DEFINE_INSTRUCTION (194, bv_u32_set, "bv-u32-set", 0, 4, 0)
 821 BV_SET_WITH_ENDIANNESS (u32, u32)
 822 VM_DEFINE_INSTRUCTION (195, bv_s32_set, "bv-s32-set", 0, 4, 0)
 823 BV_SET_WITH_ENDIANNESS (s32, s32)
 824 VM_DEFINE_INSTRUCTION (196, bv_u64_set, "bv-u64-set", 0, 4, 0)
 825 BV_SET_WITH_ENDIANNESS (u64, u64)
 826 VM_DEFINE_INSTRUCTION (197, bv_s64_set, "bv-s64-set", 0, 4, 0)
 827 BV_SET_WITH_ENDIANNESS (s64, s64)
 828 VM_DEFINE_INSTRUCTION (198, bv_f32_set, "bv-f32-set", 0, 4, 0)
 829 BV_SET_WITH_ENDIANNESS (f32, ieee_single)
 830 VM_DEFINE_INSTRUCTION (199, bv_f64_set, "bv-f64-set", 0, 4, 0)
 831 BV_SET_WITH_ENDIANNESS (f64, ieee_double)
 832
 833 #undef BV_SET_WITH_ENDIANNESS
 834
 835 #define BV_FIXABLE_INT_SET(stem, fn_stem, type, min, max, size)         \
 836 {                                                                       \
 837   scm_t_signed_bits i, j = 0;                                           \
 838   SCM bv, idx, val;                                                     \
 839   scm_t_ ## type *int_ptr;                                              \
 840                                                                         \
 841   POP3 (val, idx, bv);                                                  \
 842   VM_VALIDATE_BYTEVECTOR (bv, "bv-" #stem "-set");                      \
 843   i = SCM_I_INUM (idx);                                                 \
 844   int_ptr = (scm_t_ ## type *) (SCM_BYTEVECTOR_CONTENTS (bv) + i);      \
 845                                                                         \
 846   if (SCM_LIKELY (SCM_I_INUMP (idx)                                     \
 847                   && (i >= 0)                                           \
 848                   && (i + size <= SCM_BYTEVECTOR_LENGTH (bv))           \
 849                   && (ALIGNED_P (int_ptr, scm_t_ ## type))              \
 850                   && (SCM_I_INUMP (val))                                \
 851                   && ((j = SCM_I_INUM (val)) >= min)                    \
 852                   && (j <= max)))                                       \
 853     *int_ptr = (scm_t_ ## type) j;                                      \
 854   else                                                                  \
 855     {                                                                   \
 856       SYNC_REGISTER ();                                                 \
 857       scm_bytevector_ ## fn_stem ## _set_x (bv, idx, val);              \
 858     }                                                                   \
 859   NEXT;                                                                 \
 860 }
 861
 862 #define BV_INT_SET(stem, type, size)                                    \
 863 {                                                                       \
 864   scm_t_signed_bits i = 0;                                              \
 865   SCM bv, idx, val;                                                     \
 866   scm_t_ ## type *int_ptr;                                              \
 867                                                                         \
 868   POP3 (val, idx, bv);                                                  \
 869   VM_VALIDATE_BYTEVECTOR (bv, "bv-" #stem "-set");                      \
 870   i = SCM_I_INUM (idx);                                                 \
 871   int_ptr = (scm_t_ ## type *) (SCM_BYTEVECTOR_CONTENTS (bv) + i);      \
 872                                                                         \
 873   if (SCM_LIKELY (SCM_I_INUMP (idx)                                     \
 874                   && (i >= 0)                                           \
 875                   && (i + size <= SCM_BYTEVECTOR_LENGTH (bv))           \
 876                   && (ALIGNED_P (int_ptr, scm_t_ ## type))))            \
 877     *int_ptr = scm_to_ ## type (val);                                   \
 878   else                                                                  \
 879     {                                                                   \
 880       SYNC_REGISTER ();                                                 \
 881       scm_bytevector_ ## stem ## _native_set_x (bv, idx, val);          \
 882     }                                                                   \
 883   NEXT;                                                                 \
 884 }
 885
 886 #define BV_FLOAT_SET(stem, fn_stem, type, size)                         \
 887 {                                                                       \
 888   scm_t_signed_bits i = 0;                                              \
 889   SCM bv, idx, val;                                                     \
 890   type *float_ptr;                                                      \
 891                                                                         \
 892   POP3 (val, idx, bv);                                                  \
 893   VM_VALIDATE_BYTEVECTOR (bv, "bv-" #stem "-set");                      \
 894   i = SCM_I_INUM (idx);                                                 \
 895   float_ptr = (type *) (SCM_BYTEVECTOR_CONTENTS (bv) + i);              \
 896                                                                         \
 897   if (SCM_LIKELY (SCM_I_INUMP (idx)                                     \
 898                   && (i >= 0)                                           \
 899                   && (i + size <= SCM_BYTEVECTOR_LENGTH (bv))           \
 900                   && (ALIGNED_P (float_ptr, type))))                    \
 901     *float_ptr = scm_to_double (val);                                   \
 902   else                                                                  \
 903     {                                                                   \
 904       SYNC_REGISTER ();                                                 \
 905       scm_bytevector_ ## fn_stem ## _native_set_x (bv, idx, val);       \
 906     }                                                                   \
 907   NEXT;                                                                 \
 908 }
 909
 910 VM_DEFINE_INSTRUCTION (200, bv_u8_set, "bv-u8-set", 0, 3, 0)
 911 BV_FIXABLE_INT_SET (u8, u8, uint8, 0, SCM_T_UINT8_MAX, 1)
 912 VM_DEFINE_INSTRUCTION (201, bv_s8_set, "bv-s8-set", 0, 3, 0)
 913 BV_FIXABLE_INT_SET (s8, s8, int8, SCM_T_INT8_MIN, SCM_T_INT8_MAX, 1)
 914 VM_DEFINE_INSTRUCTION (202, bv_u16_native_set, "bv-u16-native-set", 0, 3, 0)
 915 BV_FIXABLE_INT_SET (u16, u16_native, uint16, 0, SCM_T_UINT16_MAX, 2)
 916 VM_DEFINE_INSTRUCTION (203, bv_s16_native_set, "bv-s16-native-set", 0, 3, 0)
 917 BV_FIXABLE_INT_SET (s16, s16_native, int16, SCM_T_INT16_MIN, SCM_T_INT16_MAX, 2)
 918 VM_DEFINE_INSTRUCTION (204, bv_u32_native_set, "bv-u32-native-set", 0, 3, 0)
 919 #if SIZEOF_VOID_P > 4
 920 BV_FIXABLE_INT_SET (u32, u32_native, uint32, 0, SCM_T_UINT32_MAX, 4)
 921 #else
 922 BV_INT_SET (u32, uint32, 4)
 923 #endif
 924 VM_DEFINE_INSTRUCTION (205, bv_s32_native_set, "bv-s32-native-set", 0, 3, 0)
 925 #if SIZEOF_VOID_P > 4
 926 BV_FIXABLE_INT_SET (s32, s32_native, int32, SCM_T_INT32_MIN, SCM_T_INT32_MAX, 4)
 927 #else
 928 BV_INT_SET (s32, int32, 4)
 929 #endif
 930 VM_DEFINE_INSTRUCTION (206, bv_u64_native_set, "bv-u64-native-set", 0, 3, 0)
 931 BV_INT_SET (u64, uint64, 8)
 932 VM_DEFINE_INSTRUCTION (207, bv_s64_native_set, "bv-s64-native-set", 0, 3, 0)
 933 BV_INT_SET (s64, int64, 8)
 934 VM_DEFINE_INSTRUCTION (208, bv_f32_native_set, "bv-f32-native-set", 0, 3, 0)
 935 BV_FLOAT_SET (f32, ieee_single, float, 4)
 936 VM_DEFINE_INSTRUCTION (209, bv_f64_native_set, "bv-f64-native-set", 0, 3, 0)
 937 BV_FLOAT_SET (f64, ieee_double, double, 8)
 938
 939 #undef BV_FIXABLE_INT_SET
 940 #undef BV_INT_SET
 941 #undef BV_FLOAT_SET
 942
 943 /*
 944 (defun renumber-ops ()
 945   "start from top of buffer and renumber 'VM_DEFINE_FOO (\n' sequences"
 946   (interactive "")
 947   (save-excursion
 948     (let ((counter 127)) (goto-char (point-min))
 949       (while (re-search-forward "^VM_DEFINE_[^ ]+ (\\([^,]+\\)," (point-max) t)
 950         (replace-match
 951          (number-to-string (setq counter (1+ counter)))
 952           t t nil 1)))))
 953 */
 954
 955 /*
 956   Local Variables:
 957   c-file-style: "gnu"
 958   End:
 959 */