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 #define INUM_MAX  \
 211   ((scm_t_signed_bits) SCM_UNPACK (SCM_I_MAKINUM (SCM_MOST_POSITIVE_FIXNUM)))
 212 #define INUM_MIN  \
 213   ((scm_t_signed_bits) SCM_UNPACK (SCM_I_MAKINUM (SCM_MOST_NEGATIVE_FIXNUM)))
 214
 215 #undef FUNC2
 216 #define FUNC2(CFUNC,SFUNC)                              \
 217 {                                                       \
 218   ARGS2 (x, y);                                         \
 219   if (SCM_I_INUMP (x) && SCM_I_INUMP (y))               \
 220     {                                                   \
 221       scm_t_int64 n = SCM_I_INUM (x) CFUNC SCM_I_INUM (y);\
 222       if (SCM_FIXABLE (n))                              \
 223         RETURN (SCM_I_MAKINUM (n));                     \
 224     }                                                   \
 225   SYNC_REGISTER ();                                     \
 226   RETURN (SFUNC (x, y));                                \
 227 }
 228
 229 /* Assembly tagged integer arithmetic routines.  This code uses the
 230    `asm goto' feature introduced in GCC 4.5.  */
 231
 232 #if defined __x86_64__ && SCM_GNUC_PREREQ (4, 5)
 233
 234 /* The macros below check the CPU's overflow flag to improve fixnum
 235    arithmetic.  The %rcx register is explicitly clobbered because `asm
 236    goto' can't have outputs, in which case the `r' constraint could be
 237    used to let the register allocator choose a register.
 238
 239    TODO: Use `cold' label attribute in GCC 4.6.
 240    http://gcc.gnu.org/ml/gcc-patches/2010-10/msg01777.html  */
 241
 242 # define ASM_ADD(x, y)                                                  \
 243     {                                                                   \
 244       asm volatile goto ("mov %1, %%rcx; "                              \
 245                          "test %[tag], %%cl; je %l[slow_add]; "         \
 246                          "test %[tag], %0;   je %l[slow_add]; "         \
 247                          "add %0, %%rcx;     jo %l[slow_add]; "         \
 248                          "sub %[tag], %%rcx; "                          \
 249                          "mov %%rcx, (%[vsp])\n"                        \
 250                          : /* no outputs */                             \
 251                          : "r" (x), "r" (y),                            \
 252                            [vsp] "r" (sp), [tag] "i" (scm_tc2_int)      \
 253                          : "rcx", "memory"                              \
 254                          : slow_add);                                   \
 255       NEXT;                                                             \
 256     }                                                                   \
 257   slow_add:                                                             \
 258     do { } while (0)
 259
 260 # define ASM_SUB(x, y)                                                  \
 261     {                                                                   \
 262       asm volatile goto ("mov %0, %%rcx; "                              \
 263                          "test %[tag], %%cl; je %l[slow_sub]; "         \
 264                          "test %[tag], %1;   je %l[slow_sub]; "         \
 265                          "sub %1, %%rcx;     jo %l[slow_sub]; "         \
 266                          "add %[tag], %%rcx; "                          \
 267                          "mov %%rcx, (%[vsp])\n"                        \
 268                          : /* no outputs */                             \
 269                          : "r" (x), "r" (y),                            \
 270                            [vsp] "r" (sp), [tag] "i" (scm_tc2_int)      \
 271                          : "rcx", "memory"                              \
 272                          : slow_sub);                                   \
 273       NEXT;                                                             \
 274     }                                                                   \
 275   slow_sub:                                                             \
 276     do { } while (0)
 277
 278 #endif
 279
 280
 281 VM_DEFINE_FUNCTION (150, add, "add", 2)
 282 {
 283 #ifndef ASM_ADD
 284   FUNC2 (+, scm_sum);
 285 #else
 286   ARGS2 (x, y);
 287   ASM_ADD (x, y);
 288   SYNC_REGISTER ();
 289   RETURN (scm_sum (x, y));
 290 #endif
 291 }
 292
 293 VM_DEFINE_FUNCTION (151, add1, "add1", 1)
 294 {
 295   ARGS1 (x);
 296
 297   /* Check for overflow.  */
 298   if (SCM_LIKELY ((scm_t_intptr) SCM_UNPACK (x) < INUM_MAX))
 299     {
 300       SCM result;
 301
 302       /* Add the integers without untagging.  */
 303       result = SCM_PACK ((scm_t_intptr) SCM_UNPACK (x)
 304                          + (scm_t_intptr) SCM_UNPACK (SCM_I_MAKINUM (1))
 305                          - scm_tc2_int);
 306
 307       if (SCM_LIKELY (SCM_I_INUMP (result)))
 308         RETURN (result);
 309     }
 310
 311   SYNC_REGISTER ();
 312   RETURN (scm_sum (x, SCM_I_MAKINUM (1)));
 313 }
 314
 315 VM_DEFINE_FUNCTION (152, sub, "sub", 2)
 316 {
 317 #ifndef ASM_SUB
 318   FUNC2 (-, scm_difference);
 319 #else
 320   ARGS2 (x, y);
 321   ASM_SUB (x, y);
 322   SYNC_REGISTER ();
 323   RETURN (scm_difference (x, y));
 324 #endif
 325 }
 326
 327 VM_DEFINE_FUNCTION (153, sub1, "sub1", 1)
 328 {
 329   ARGS1 (x);
 330
 331   /* Check for underflow.  */
 332   if (SCM_LIKELY ((scm_t_intptr) SCM_UNPACK (x) > INUM_MIN))
 333     {
 334       SCM result;
 335
 336       /* Substract the integers without untagging.  */
 337       result = SCM_PACK ((scm_t_intptr) SCM_UNPACK (x)
 338                          - (scm_t_intptr) SCM_UNPACK (SCM_I_MAKINUM (1))
 339                          + scm_tc2_int);
 340
 341       if (SCM_LIKELY (SCM_I_INUMP (result)))
 342         RETURN (result);
 343     }
 344
 345   SYNC_REGISTER ();
 346   RETURN (scm_difference (x, SCM_I_MAKINUM (1)));
 347 }
 348
 349 # undef ASM_ADD
 350 # undef ASM_SUB
 351
 352 VM_DEFINE_FUNCTION (154, mul, "mul", 2)
 353 {
 354   ARGS2 (x, y);
 355   SYNC_REGISTER ();
 356   RETURN (scm_product (x, y));
 357 }
 358
 359 VM_DEFINE_FUNCTION (155, div, "div", 2)
 360 {
 361   ARGS2 (x, y);
 362   SYNC_REGISTER ();
 363   RETURN (scm_divide (x, y));
 364 }
 365
 366 VM_DEFINE_FUNCTION (156, quo, "quo", 2)
 367 {
 368   ARGS2 (x, y);
 369   SYNC_REGISTER ();
 370   RETURN (scm_quotient (x, y));
 371 }
 372
 373 VM_DEFINE_FUNCTION (157, rem, "rem", 2)
 374 {
 375   ARGS2 (x, y);
 376   SYNC_REGISTER ();
 377   RETURN (scm_remainder (x, y));
 378 }
 379
 380 VM_DEFINE_FUNCTION (158, mod, "mod", 2)
 381 {
 382   ARGS2 (x, y);
 383   SYNC_REGISTER ();
 384   RETURN (scm_modulo (x, y));
 385 }
 386
 387 VM_DEFINE_FUNCTION (159, ash, "ash", 2)
 388 {
 389   ARGS2 (x, y);
 390   if (SCM_I_INUMP (x) && SCM_I_INUMP (y))
 391     {
 392       if (SCM_I_INUM (y) < 0)
 393         {
 394           /* Right shift, will be a fixnum. */
 395           if (SCM_I_INUM (y) > -SCM_I_FIXNUM_BIT)
 396             RETURN (SCM_I_MAKINUM (SCM_I_INUM (x) >> -SCM_I_INUM (y)));
 397           /* fall through */
 398         }
 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   POP3 (val, idx, 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   VM_ASSERT (SCM_STRUCTP (obj), vm_error_not_a_struct (proc, obj))
 509
 510 VM_DEFINE_FUNCTION (166, struct_p, "struct?", 1)
 511 {
 512   ARGS1 (obj);
 513   RETURN (scm_from_bool (SCM_STRUCTP (obj)));
 514 }
 515
 516 VM_DEFINE_FUNCTION (167, struct_vtable, "struct-vtable", 1)
 517 {
 518   ARGS1 (obj);
 519   VM_VALIDATE_STRUCT (obj, "struct_vtable");
 520   RETURN (SCM_STRUCT_VTABLE (obj));
 521 }
 522
 523 VM_DEFINE_INSTRUCTION (168, make_struct, "make-struct", 2, -1, 1)
 524 {
 525   unsigned h = FETCH ();
 526   unsigned l = FETCH ();
 527   scm_t_bits n = ((h << 8U) + l);
 528   SCM vtable = sp[-(n - 1)];
 529   const SCM *inits = sp - n + 2;
 530   SCM ret;
 531
 532   SYNC_REGISTER ();
 533
 534   if (SCM_LIKELY (SCM_STRUCTP (vtable)
 535                   && SCM_VTABLE_FLAG_IS_SET (vtable, SCM_VTABLE_FLAG_SIMPLE)
 536                   && (SCM_STRUCT_DATA_REF (vtable, scm_vtable_index_size) + 1
 537                       == n)
 538                   && !SCM_VTABLE_INSTANCE_FINALIZER (vtable)))
 539     {
 540       /* Verily, we are making a simple struct with the right number of
 541          initializers, and no finalizer. */
 542       ret = scm_words ((scm_t_bits)SCM_STRUCT_DATA (vtable) | scm_tc3_struct,
 543                        n + 1);
 544       SCM_SET_CELL_WORD_1 (ret, (scm_t_bits)SCM_CELL_OBJECT_LOC (ret, 2));
 545       memcpy (SCM_STRUCT_DATA (ret), inits, (n - 1) * sizeof (SCM));
 546     }
 547   else
 548     ret = scm_c_make_structv (vtable, 0, n - 1, (scm_t_bits *) inits);
 549
 550   DROPN (n);
 551   PUSH (ret);
 552
 553   NEXT;
 554 }
 555
 556 VM_DEFINE_FUNCTION (169, struct_ref, "struct-ref", 2)
 557 {
 558   ARGS2 (obj, pos);
 559
 560   if (SCM_LIKELY (SCM_STRUCTP (obj)
 561                   && SCM_STRUCT_VTABLE_FLAG_IS_SET (obj,
 562                                                     SCM_VTABLE_FLAG_SIMPLE)
 563                   && SCM_I_INUMP (pos)))
 564     {
 565       SCM vtable;
 566       scm_t_bits index, len;
 567
 568       /* True, an inum is a signed value, but cast to unsigned it will
 569          certainly be more than the length, so we will fall through if
 570          index is negative. */
 571       index = SCM_I_INUM (pos);
 572       vtable = SCM_STRUCT_VTABLE (obj);
 573       len = SCM_STRUCT_DATA_REF (vtable, scm_vtable_index_size);
 574
 575       if (SCM_LIKELY (index < len))
 576         {
 577           scm_t_bits *data = SCM_STRUCT_DATA (obj);
 578           RETURN (SCM_PACK (data[index]));
 579         }
 580     }
 581
 582   SYNC_REGISTER ();
 583   RETURN (scm_struct_ref (obj, pos));
 584 }
 585
 586 VM_DEFINE_FUNCTION (170, struct_set, "struct-set", 3)
 587 {
 588   ARGS3 (obj, pos, val);
 589
 590   if (SCM_LIKELY (SCM_STRUCTP (obj)
 591                   && SCM_STRUCT_VTABLE_FLAG_IS_SET (obj,
 592                                                     SCM_VTABLE_FLAG_SIMPLE)
 593                   && SCM_STRUCT_VTABLE_FLAG_IS_SET (obj,
 594                                                     SCM_VTABLE_FLAG_SIMPLE_RW)
 595                   && SCM_I_INUMP (pos)))
 596     {
 597       SCM vtable;
 598       scm_t_bits index, len;
 599
 600       /* See above regarding index being >= 0. */
 601       index = SCM_I_INUM (pos);
 602       vtable = SCM_STRUCT_VTABLE (obj);
 603       len = SCM_STRUCT_DATA_REF (vtable, scm_vtable_index_size);
 604       if (SCM_LIKELY (index < len))
 605         {
 606           scm_t_bits *data = SCM_STRUCT_DATA (obj);
 607           data[index] = SCM_UNPACK (val);
 608           RETURN (val);
 609         }
 610     }
 611
 612   SYNC_REGISTER ();
 613   RETURN (scm_struct_set_x (obj, pos, val));
 614 }
 615
 616 \f
 617 /*
 618  * GOOPS support
 619  */
 620 VM_DEFINE_FUNCTION (171, class_of, "class-of", 1)
 621 {
 622   ARGS1 (obj);
 623   if (SCM_INSTANCEP (obj))
 624     RETURN (SCM_CLASS_OF (obj));
 625   SYNC_REGISTER ();
 626   RETURN (scm_class_of (obj));
 627 }
 628
 629 /* FIXME: No checking whatsoever. */
 630 VM_DEFINE_FUNCTION (172, slot_ref, "slot-ref", 2)
 631 {
 632   size_t slot;
 633   ARGS2 (instance, idx);
 634   slot = SCM_I_INUM (idx);
 635   RETURN (SCM_PACK (SCM_STRUCT_DATA (instance) [slot]));
 636 }
 637
 638 /* FIXME: No checking whatsoever. */
 639 VM_DEFINE_INSTRUCTION (173, slot_set, "slot-set", 0, 3, 0)
 640 {
 641   SCM instance, idx, val;
 642   size_t slot;
 643   POP3 (val, idx, instance);
 644   slot = SCM_I_INUM (idx);
 645   SCM_STRUCT_DATA (instance) [slot] = SCM_UNPACK (val);
 646   NEXT;
 647 }
 648
 649 \f
 650 /*
 651  * Bytevectors
 652  */
 653 #define VM_VALIDATE_BYTEVECTOR(x, proc)         \
 654   VM_ASSERT (SCM_BYTEVECTOR_P (x), vm_error_not_a_bytevector (proc, x))
 655
 656 #define BV_REF_WITH_ENDIANNESS(stem, fn_stem)                           \
 657 {                                                                       \
 658   SCM endianness;                                                       \
 659   POP (endianness);                                                     \
 660   if (scm_is_eq (endianness, scm_i_native_endianness))                  \
 661     goto VM_LABEL (bv_##stem##_native_ref);                             \
 662   {                                                                     \
 663     ARGS2 (bv, idx);                                                    \
 664     SYNC_REGISTER ();                                                   \
 665     RETURN (scm_bytevector_##fn_stem##_ref (bv, idx, endianness));      \
 666   }                                                                     \
 667 }
 668
 669 /* Return true (non-zero) if PTR has suitable alignment for TYPE.  */
 670 #define ALIGNED_P(ptr, type)                    \
 671   ((scm_t_uintptr) (ptr) % alignof_type (type) == 0)
 672
 673 VM_DEFINE_FUNCTION (174, bv_u16_ref, "bv-u16-ref", 3)
 674 BV_REF_WITH_ENDIANNESS (u16, u16)
 675 VM_DEFINE_FUNCTION (175, bv_s16_ref, "bv-s16-ref", 3)
 676 BV_REF_WITH_ENDIANNESS (s16, s16)
 677 VM_DEFINE_FUNCTION (176, bv_u32_ref, "bv-u32-ref", 3)
 678 BV_REF_WITH_ENDIANNESS (u32, u32)
 679 VM_DEFINE_FUNCTION (177, bv_s32_ref, "bv-s32-ref", 3)
 680 BV_REF_WITH_ENDIANNESS (s32, s32)
 681 VM_DEFINE_FUNCTION (178, bv_u64_ref, "bv-u64-ref", 3)
 682 BV_REF_WITH_ENDIANNESS (u64, u64)
 683 VM_DEFINE_FUNCTION (179, bv_s64_ref, "bv-s64-ref", 3)
 684 BV_REF_WITH_ENDIANNESS (s64, s64)
 685 VM_DEFINE_FUNCTION (180, bv_f32_ref, "bv-f32-ref", 3)
 686 BV_REF_WITH_ENDIANNESS (f32, ieee_single)
 687 VM_DEFINE_FUNCTION (181, bv_f64_ref, "bv-f64-ref", 3)
 688 BV_REF_WITH_ENDIANNESS (f64, ieee_double)
 689
 690 #undef BV_REF_WITH_ENDIANNESS
 691
 692 #define BV_FIXABLE_INT_REF(stem, fn_stem, type, size)                   \
 693 {                                                                       \
 694   scm_t_signed_bits i;                                                  \
 695   const scm_t_ ## type *int_ptr;                                        \
 696   ARGS2 (bv, idx);                                                      \
 697                                                                         \
 698   VM_VALIDATE_BYTEVECTOR (bv, "bv-" #stem "-ref");                      \
 699   i = SCM_I_INUM (idx);                                                 \
 700   int_ptr = (scm_t_ ## type *) (SCM_BYTEVECTOR_CONTENTS (bv) + i);      \
 701                                                                         \
 702   if (SCM_LIKELY (SCM_I_INUMP (idx)                                     \
 703                   && (i >= 0)                                           \
 704                   && (i + size <= SCM_BYTEVECTOR_LENGTH (bv))           \
 705                   && (ALIGNED_P (int_ptr, scm_t_ ## type))))            \
 706     RETURN (SCM_I_MAKINUM (*int_ptr));                                  \
 707   else                                                                  \
 708     {                                                                   \
 709       SYNC_REGISTER ();                                                 \
 710       RETURN (scm_bytevector_ ## fn_stem ## _ref (bv, idx));            \
 711     }                                                                   \
 712 }
 713
 714 #define BV_INT_REF(stem, type, size)                                    \
 715 {                                                                       \
 716   scm_t_signed_bits i;                                                  \
 717   const scm_t_ ## type *int_ptr;                                        \
 718   ARGS2 (bv, idx);                                                      \
 719                                                                         \
 720   VM_VALIDATE_BYTEVECTOR (bv, "bv-" #stem "-ref");                      \
 721   i = SCM_I_INUM (idx);                                                 \
 722   int_ptr = (scm_t_ ## type *) (SCM_BYTEVECTOR_CONTENTS (bv) + i);      \
 723                                                                         \
 724   if (SCM_LIKELY (SCM_I_INUMP (idx)                                     \
 725                   && (i >= 0)                                           \
 726                   && (i + size <= SCM_BYTEVECTOR_LENGTH (bv))           \
 727                   && (ALIGNED_P (int_ptr, scm_t_ ## type))))            \
 728     {                                                                   \
 729       scm_t_ ## type x = *int_ptr;                                      \
 730       if (SCM_FIXABLE (x))                                              \
 731         RETURN (SCM_I_MAKINUM (x));                                     \
 732       else                                                              \
 733         {                                                               \
 734           SYNC_REGISTER ();                                             \
 735           RETURN (scm_from_ ## type (x));                               \
 736         }                                                               \
 737     }                                                                   \
 738   else                                                                  \
 739     {                                                                   \
 740       SYNC_REGISTER ();                                                 \
 741       RETURN (scm_bytevector_ ## stem ## _native_ref (bv, idx));        \
 742     }                                                                   \
 743 }
 744
 745 #define BV_FLOAT_REF(stem, fn_stem, type, size)                         \
 746 {                                                                       \
 747   scm_t_signed_bits i;                                                  \
 748   const type *float_ptr;                                                \
 749   ARGS2 (bv, idx);                                                      \
 750                                                                         \
 751   VM_VALIDATE_BYTEVECTOR (bv, "bv-" #stem "-ref");                      \
 752   i = SCM_I_INUM (idx);                                                 \
 753   float_ptr = (type *) (SCM_BYTEVECTOR_CONTENTS (bv) + i);              \
 754                                                                         \
 755   SYNC_REGISTER ();                                                     \
 756   if (SCM_LIKELY (SCM_I_INUMP (idx)                                     \
 757                   && (i >= 0)                                           \
 758                   && (i + size <= SCM_BYTEVECTOR_LENGTH (bv))           \
 759                   && (ALIGNED_P (float_ptr, type))))                    \
 760     RETURN (scm_from_double (*float_ptr));                              \
 761   else                                                                  \
 762     RETURN (scm_bytevector_ ## fn_stem ## _native_ref (bv, idx));       \
 763 }
 764
 765 VM_DEFINE_FUNCTION (182, bv_u8_ref, "bv-u8-ref", 2)
 766 BV_FIXABLE_INT_REF (u8, u8, uint8, 1)
 767 VM_DEFINE_FUNCTION (183, bv_s8_ref, "bv-s8-ref", 2)
 768 BV_FIXABLE_INT_REF (s8, s8, int8, 1)
 769 VM_DEFINE_FUNCTION (184, bv_u16_native_ref, "bv-u16-native-ref", 2)
 770 BV_FIXABLE_INT_REF (u16, u16_native, uint16, 2)
 771 VM_DEFINE_FUNCTION (185, bv_s16_native_ref, "bv-s16-native-ref", 2)
 772 BV_FIXABLE_INT_REF (s16, s16_native, int16, 2)
 773 VM_DEFINE_FUNCTION (186, bv_u32_native_ref, "bv-u32-native-ref", 2)
 774 #if SIZEOF_VOID_P > 4
 775 BV_FIXABLE_INT_REF (u32, u32_native, uint32, 4)
 776 #else
 777 BV_INT_REF (u32, uint32, 4)
 778 #endif
 779 VM_DEFINE_FUNCTION (187, bv_s32_native_ref, "bv-s32-native-ref", 2)
 780 #if SIZEOF_VOID_P > 4
 781 BV_FIXABLE_INT_REF (s32, s32_native, int32, 4)
 782 #else
 783 BV_INT_REF (s32, int32, 4)
 784 #endif
 785 VM_DEFINE_FUNCTION (188, bv_u64_native_ref, "bv-u64-native-ref", 2)
 786 BV_INT_REF (u64, uint64, 8)
 787 VM_DEFINE_FUNCTION (189, bv_s64_native_ref, "bv-s64-native-ref", 2)
 788 BV_INT_REF (s64, int64, 8)
 789 VM_DEFINE_FUNCTION (190, bv_f32_native_ref, "bv-f32-native-ref", 2)
 790 BV_FLOAT_REF (f32, ieee_single, float, 4)
 791 VM_DEFINE_FUNCTION (191, bv_f64_native_ref, "bv-f64-native-ref", 2)
 792 BV_FLOAT_REF (f64, ieee_double, double, 8)
 793
 794 #undef BV_FIXABLE_INT_REF
 795 #undef BV_INT_REF
 796 #undef BV_FLOAT_REF
 797
 798
 799
 800 #define BV_SET_WITH_ENDIANNESS(stem, fn_stem)                           \
 801 {                                                                       \
 802   SCM endianness;                                                       \
 803   POP (endianness);                                                     \
 804   if (scm_is_eq (endianness, scm_i_native_endianness))                  \
 805     goto VM_LABEL (bv_##stem##_native_set);                             \
 806   {                                                                     \
 807     SCM bv, idx, val; POP3 (val, idx, bv);                              \
 808     SYNC_REGISTER ();                                                   \
 809     scm_bytevector_##fn_stem##_set_x (bv, idx, val, endianness);        \
 810     NEXT;                                                               \
 811   }                                                                     \
 812 }
 813
 814 VM_DEFINE_INSTRUCTION (192, bv_u16_set, "bv-u16-set", 0, 4, 0)
 815 BV_SET_WITH_ENDIANNESS (u16, u16)
 816 VM_DEFINE_INSTRUCTION (193, bv_s16_set, "bv-s16-set", 0, 4, 0)
 817 BV_SET_WITH_ENDIANNESS (s16, s16)
 818 VM_DEFINE_INSTRUCTION (194, bv_u32_set, "bv-u32-set", 0, 4, 0)
 819 BV_SET_WITH_ENDIANNESS (u32, u32)
 820 VM_DEFINE_INSTRUCTION (195, bv_s32_set, "bv-s32-set", 0, 4, 0)
 821 BV_SET_WITH_ENDIANNESS (s32, s32)
 822 VM_DEFINE_INSTRUCTION (196, bv_u64_set, "bv-u64-set", 0, 4, 0)
 823 BV_SET_WITH_ENDIANNESS (u64, u64)
 824 VM_DEFINE_INSTRUCTION (197, bv_s64_set, "bv-s64-set", 0, 4, 0)
 825 BV_SET_WITH_ENDIANNESS (s64, s64)
 826 VM_DEFINE_INSTRUCTION (198, bv_f32_set, "bv-f32-set", 0, 4, 0)
 827 BV_SET_WITH_ENDIANNESS (f32, ieee_single)
 828 VM_DEFINE_INSTRUCTION (199, bv_f64_set, "bv-f64-set", 0, 4, 0)
 829 BV_SET_WITH_ENDIANNESS (f64, ieee_double)
 830
 831 #undef BV_SET_WITH_ENDIANNESS
 832
 833 #define BV_FIXABLE_INT_SET(stem, fn_stem, type, min, max, size)         \
 834 {                                                                       \
 835   scm_t_signed_bits i, j = 0;                                           \
 836   SCM bv, idx, val;                                                     \
 837   scm_t_ ## type *int_ptr;                                              \
 838                                                                         \
 839   POP3 (val, idx, bv);                                                  \
 840   VM_VALIDATE_BYTEVECTOR (bv, "bv-" #stem "-set");                      \
 841   i = SCM_I_INUM (idx);                                                 \
 842   int_ptr = (scm_t_ ## type *) (SCM_BYTEVECTOR_CONTENTS (bv) + i);      \
 843                                                                         \
 844   if (SCM_LIKELY (SCM_I_INUMP (idx)                                     \
 845                   && (i >= 0)                                           \
 846                   && (i + size <= SCM_BYTEVECTOR_LENGTH (bv))           \
 847                   && (ALIGNED_P (int_ptr, scm_t_ ## type))              \
 848                   && (SCM_I_INUMP (val))                                \
 849                   && ((j = SCM_I_INUM (val)) >= min)                    \
 850                   && (j <= max)))                                       \
 851     *int_ptr = (scm_t_ ## type) j;                                      \
 852   else                                                                  \
 853     {                                                                   \
 854       SYNC_REGISTER ();                                                 \
 855       scm_bytevector_ ## fn_stem ## _set_x (bv, idx, val);              \
 856     }                                                                   \
 857   NEXT;                                                                 \
 858 }
 859
 860 #define BV_INT_SET(stem, type, size)                                    \
 861 {                                                                       \
 862   scm_t_signed_bits i = 0;                                              \
 863   SCM bv, idx, val;                                                     \
 864   scm_t_ ## type *int_ptr;                                              \
 865                                                                         \
 866   POP3 (val, idx, bv);                                                  \
 867   VM_VALIDATE_BYTEVECTOR (bv, "bv-" #stem "-set");                      \
 868   i = SCM_I_INUM (idx);                                                 \
 869   int_ptr = (scm_t_ ## type *) (SCM_BYTEVECTOR_CONTENTS (bv) + i);      \
 870                                                                         \
 871   if (SCM_LIKELY (SCM_I_INUMP (idx)                                     \
 872                   && (i >= 0)                                           \
 873                   && (i + size <= SCM_BYTEVECTOR_LENGTH (bv))           \
 874                   && (ALIGNED_P (int_ptr, scm_t_ ## type))))            \
 875     *int_ptr = scm_to_ ## type (val);                                   \
 876   else                                                                  \
 877     {                                                                   \
 878       SYNC_REGISTER ();                                                 \
 879       scm_bytevector_ ## stem ## _native_set_x (bv, idx, val);          \
 880     }                                                                   \
 881   NEXT;                                                                 \
 882 }
 883
 884 #define BV_FLOAT_SET(stem, fn_stem, type, size)                         \
 885 {                                                                       \
 886   scm_t_signed_bits i = 0;                                              \
 887   SCM bv, idx, val;                                                     \
 888   type *float_ptr;                                                      \
 889                                                                         \
 890   POP3 (val, idx, bv);                                                  \
 891   VM_VALIDATE_BYTEVECTOR (bv, "bv-" #stem "-set");                      \
 892   i = SCM_I_INUM (idx);                                                 \
 893   float_ptr = (type *) (SCM_BYTEVECTOR_CONTENTS (bv) + i);              \
 894                                                                         \
 895   if (SCM_LIKELY (SCM_I_INUMP (idx)                                     \
 896                   && (i >= 0)                                           \
 897                   && (i + size <= SCM_BYTEVECTOR_LENGTH (bv))           \
 898                   && (ALIGNED_P (float_ptr, type))))                    \
 899     *float_ptr = scm_to_double (val);                                   \
 900   else                                                                  \
 901     {                                                                   \
 902       SYNC_REGISTER ();                                                 \
 903       scm_bytevector_ ## fn_stem ## _native_set_x (bv, idx, val);       \
 904     }                                                                   \
 905   NEXT;                                                                 \
 906 }
 907
 908 VM_DEFINE_INSTRUCTION (200, bv_u8_set, "bv-u8-set", 0, 3, 0)
 909 BV_FIXABLE_INT_SET (u8, u8, uint8, 0, SCM_T_UINT8_MAX, 1)
 910 VM_DEFINE_INSTRUCTION (201, bv_s8_set, "bv-s8-set", 0, 3, 0)
 911 BV_FIXABLE_INT_SET (s8, s8, int8, SCM_T_INT8_MIN, SCM_T_INT8_MAX, 1)
 912 VM_DEFINE_INSTRUCTION (202, bv_u16_native_set, "bv-u16-native-set", 0, 3, 0)
 913 BV_FIXABLE_INT_SET (u16, u16_native, uint16, 0, SCM_T_UINT16_MAX, 2)
 914 VM_DEFINE_INSTRUCTION (203, bv_s16_native_set, "bv-s16-native-set", 0, 3, 0)
 915 BV_FIXABLE_INT_SET (s16, s16_native, int16, SCM_T_INT16_MIN, SCM_T_INT16_MAX, 2)
 916 VM_DEFINE_INSTRUCTION (204, bv_u32_native_set, "bv-u32-native-set", 0, 3, 0)
 917 #if SIZEOF_VOID_P > 4
 918 BV_FIXABLE_INT_SET (u32, u32_native, uint32, 0, SCM_T_UINT32_MAX, 4)
 919 #else
 920 BV_INT_SET (u32, uint32, 4)
 921 #endif
 922 VM_DEFINE_INSTRUCTION (205, bv_s32_native_set, "bv-s32-native-set", 0, 3, 0)
 923 #if SIZEOF_VOID_P > 4
 924 BV_FIXABLE_INT_SET (s32, s32_native, int32, SCM_T_INT32_MIN, SCM_T_INT32_MAX, 4)
 925 #else
 926 BV_INT_SET (s32, int32, 4)
 927 #endif
 928 VM_DEFINE_INSTRUCTION (206, bv_u64_native_set, "bv-u64-native-set", 0, 3, 0)
 929 BV_INT_SET (u64, uint64, 8)
 930 VM_DEFINE_INSTRUCTION (207, bv_s64_native_set, "bv-s64-native-set", 0, 3, 0)
 931 BV_INT_SET (s64, int64, 8)
 932 VM_DEFINE_INSTRUCTION (208, bv_f32_native_set, "bv-f32-native-set", 0, 3, 0)
 933 BV_FLOAT_SET (f32, ieee_single, float, 4)
 934 VM_DEFINE_INSTRUCTION (209, bv_f64_native_set, "bv-f64-native-set", 0, 3, 0)
 935 BV_FLOAT_SET (f64, ieee_double, double, 8)
 936
 937 #undef BV_FIXABLE_INT_SET
 938 #undef BV_INT_SET
 939 #undef BV_FLOAT_SET
 940
 941 /*
 942 (defun renumber-ops ()
 943   "start from top of buffer and renumber 'VM_DEFINE_FOO (\n' sequences"
 944   (interactive "")
 945   (save-excursion
 946     (let ((counter 127)) (goto-char (point-min))
 947       (while (re-search-forward "^VM_DEFINE_[^ ]+ (\\([^,]+\\)," (point-max) t)
 948         (replace-match
 949          (number-to-string (setq counter (1+ counter)))
 950           t t nil 1)))))
 951 */
 952
 953 /*
 954   Local Variables:
 955   c-file-style: "gnu"
 956   End:
 957 */