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   1
   2 /******************************************************************************
   3  *
   4  * Module Name: exmisc - ACPI AML (p-code) execution - specific opcodes
   5  *
   6  *****************************************************************************/
   7
   8 /*
   9  * Copyright (C) 2000 - 2005, R. Byron Moore
  10  * All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions, and the following disclaimer,
  17  *    without modification.
  18  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  19  *    substantially similar to the "NO WARRANTY" disclaimer below
  20  *    ("Disclaimer") and any redistribution must be conditioned upon
  21  *    including a substantially similar Disclaimer requirement for further
  22  *    binary redistribution.
  23  * 3. Neither the names of the above-listed copyright holders nor the names
  24  *    of any contributors may be used to endorse or promote products derived
  25  *    from this software without specific prior written permission.
  26  *
  27  * Alternatively, this software may be distributed under the terms of the
  28  * GNU General Public License ("GPL") version 2 as published by the Free
  29  * Software Foundation.
  30  *
  31  * NO WARRANTY
  32  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  33  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  34  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  35  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  36  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  37  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  38  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  39  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  40  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  41  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  42  * POSSIBILITY OF SUCH DAMAGES.
  43  */
  44
  45 #include <acpi/acpi.h>
  46 #include <acpi/acinterp.h>
  47 #include <acpi/amlcode.h>
  48 #include <acpi/amlresrc.h>
  49
  50 #define _COMPONENT          ACPI_EXECUTER
  51 ACPI_MODULE_NAME("exmisc")
  52
  53 /*******************************************************************************
  54  *
  55  * FUNCTION:    acpi_ex_get_object_reference
  56  *
  57  * PARAMETERS:  obj_desc            - Create a reference to this object
  58  *              return_desc         - Where to store the reference
  59  *              walk_state          - Current state
  60  *
  61  * RETURN:      Status
  62  *
  63  * DESCRIPTION: Obtain and return a "reference" to the target object
  64  *              Common code for the ref_of_op and the cond_ref_of_op.
  65  *
  66  ******************************************************************************/
  67 acpi_status
  68 acpi_ex_get_object_reference(union acpi_operand_object *obj_desc,
  69                              union acpi_operand_object **return_desc,
  70                              struct acpi_walk_state *walk_state)
  71 {
  72         union acpi_operand_object *reference_obj;
  73         union acpi_operand_object *referenced_obj;
  74
  75         ACPI_FUNCTION_TRACE_PTR("ex_get_object_reference", obj_desc);
  76
  77         *return_desc = NULL;
  78
  79         switch (ACPI_GET_DESCRIPTOR_TYPE(obj_desc)) {
  80         case ACPI_DESC_TYPE_OPERAND:
  81
  82                 if (ACPI_GET_OBJECT_TYPE(obj_desc) != ACPI_TYPE_LOCAL_REFERENCE) {
  83                         return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
  84                 }
  85
  86                 /*
  87                  * Must be a reference to a Local or Arg
  88                  */
  89                 switch (obj_desc->reference.opcode) {
  90                 case AML_LOCAL_OP:
  91                 case AML_ARG_OP:
  92                 case AML_DEBUG_OP:
  93
  94                         /* The referenced object is the pseudo-node for the local/arg */
  95
  96                         referenced_obj = obj_desc->reference.object;
  97                         break;
  98
  99                 default:
 100
 101                         ACPI_REPORT_ERROR(("Unknown Reference opcode in get_reference %X\n", obj_desc->reference.opcode));
 102                         return_ACPI_STATUS(AE_AML_INTERNAL);
 103                 }
 104                 break;
 105
 106         case ACPI_DESC_TYPE_NAMED:
 107
 108                 /*
 109                  * A named reference that has already been resolved to a Node
 110                  */
 111                 referenced_obj = obj_desc;
 112                 break;
 113
 114         default:
 115
 116                 ACPI_REPORT_ERROR(("Invalid descriptor type in get_reference: %X\n", ACPI_GET_DESCRIPTOR_TYPE(obj_desc)));
 117                 return_ACPI_STATUS(AE_TYPE);
 118         }
 119
 120         /* Create a new reference object */
 121
 122         reference_obj =
 123             acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_REFERENCE);
 124         if (!reference_obj) {
 125                 return_ACPI_STATUS(AE_NO_MEMORY);
 126         }
 127
 128         reference_obj->reference.opcode = AML_REF_OF_OP;
 129         reference_obj->reference.object = referenced_obj;
 130         *return_desc = reference_obj;
 131
 132         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 133                           "Object %p Type [%s], returning Reference %p\n",
 134                           obj_desc, acpi_ut_get_object_type_name(obj_desc),
 135                           *return_desc));
 136
 137         return_ACPI_STATUS(AE_OK);
 138 }
 139
 140 /*******************************************************************************
 141  *
 142  * FUNCTION:    acpi_ex_concat_template
 143  *
 144  * PARAMETERS:  Operand0            - First source object
 145  *              Operand1            - Second source object
 146  *              actual_return_desc  - Where to place the return object
 147  *              walk_state          - Current walk state
 148  *
 149  * RETURN:      Status
 150  *
 151  * DESCRIPTION: Concatenate two resource templates
 152  *
 153  ******************************************************************************/
 154
 155 acpi_status
 156 acpi_ex_concat_template(union acpi_operand_object *operand0,
 157                         union acpi_operand_object *operand1,
 158                         union acpi_operand_object **actual_return_desc,
 159                         struct acpi_walk_state *walk_state)
 160 {
 161         acpi_status status;
 162         union acpi_operand_object *return_desc;
 163         u8 *new_buf;
 164         u8 *end_tag;
 165         acpi_size length0;
 166         acpi_size length1;
 167
 168         ACPI_FUNCTION_TRACE("ex_concat_template");
 169
 170         /*
 171          * Find the end_tag descriptor in each resource template.
 172          * Note: returned pointers point TO the end_tag, not past it.
 173          *
 174          * Compute the length of each resource template
 175          */
 176         status = acpi_ut_get_resource_end_tag(operand0, &end_tag);
 177         if (ACPI_FAILURE(status)) {
 178                 return_ACPI_STATUS(status);
 179         }
 180
 181         length0 = ACPI_PTR_DIFF(end_tag, operand0->buffer.pointer);
 182
 183         status = acpi_ut_get_resource_end_tag(operand1, &end_tag);
 184         if (ACPI_FAILURE(status)) {
 185                 return_ACPI_STATUS(status);
 186         }
 187
 188         /* Include the end_tag in the second template length */
 189
 190         length1 = ACPI_PTR_DIFF(end_tag, operand1->buffer.pointer) +
 191             sizeof(struct aml_resource_end_tag);
 192
 193         /* Create a new buffer object for the result */
 194
 195         return_desc = acpi_ut_create_buffer_object(length0 + length1);
 196         if (!return_desc) {
 197                 return_ACPI_STATUS(AE_NO_MEMORY);
 198         }
 199
 200         /*
 201          * Copy the templates to the new buffer, 0 first, then 1 follows. One
 202          * end_tag descriptor is copied from Operand1.
 203          */
 204         new_buf = return_desc->buffer.pointer;
 205         ACPI_MEMCPY(new_buf, operand0->buffer.pointer, length0);
 206         ACPI_MEMCPY(new_buf + length0, operand1->buffer.pointer, length1);
 207
 208         /* Set the end_tag checksum to zero, means "ignore checksum" */
 209
 210         new_buf[return_desc->buffer.length - 1] = 0;
 211
 212         /* Return the completed resource template */
 213
 214         *actual_return_desc = return_desc;
 215         return_ACPI_STATUS(AE_OK);
 216 }
 217
 218 /*******************************************************************************
 219  *
 220  * FUNCTION:    acpi_ex_do_concatenate
 221  *
 222  * PARAMETERS:  Operand0            - First source object
 223  *              Operand1            - Second source object
 224  *              actual_return_desc  - Where to place the return object
 225  *              walk_state          - Current walk state
 226  *
 227  * RETURN:      Status
 228  *
 229  * DESCRIPTION: Concatenate two objects OF THE SAME TYPE.
 230  *
 231  ******************************************************************************/
 232
 233 acpi_status
 234 acpi_ex_do_concatenate(union acpi_operand_object *operand0,
 235                        union acpi_operand_object *operand1,
 236                        union acpi_operand_object **actual_return_desc,
 237                        struct acpi_walk_state *walk_state)
 238 {
 239         union acpi_operand_object *local_operand1 = operand1;
 240         union acpi_operand_object *return_desc;
 241         char *new_buf;
 242         acpi_status status;
 243
 244         ACPI_FUNCTION_TRACE("ex_do_concatenate");
 245
 246         /*
 247          * Convert the second operand if necessary.  The first operand
 248          * determines the type of the second operand, (See the Data Types
 249          * section of the ACPI specification.)  Both object types are
 250          * guaranteed to be either Integer/String/Buffer by the operand
 251          * resolution mechanism.
 252          */
 253         switch (ACPI_GET_OBJECT_TYPE(operand0)) {
 254         case ACPI_TYPE_INTEGER:
 255                 status =
 256                     acpi_ex_convert_to_integer(operand1, &local_operand1, 16);
 257                 break;
 258
 259         case ACPI_TYPE_STRING:
 260                 status = acpi_ex_convert_to_string(operand1, &local_operand1,
 261                                                    ACPI_IMPLICIT_CONVERT_HEX);
 262                 break;
 263
 264         case ACPI_TYPE_BUFFER:
 265                 status = acpi_ex_convert_to_buffer(operand1, &local_operand1);
 266                 break;
 267
 268         default:
 269                 ACPI_REPORT_ERROR(("Concatanate - invalid object type: %X\n",
 270                                    ACPI_GET_OBJECT_TYPE(operand0)));
 271                 status = AE_AML_INTERNAL;
 272         }
 273
 274         if (ACPI_FAILURE(status)) {
 275                 goto cleanup;
 276         }
 277
 278         /*
 279          * Both operands are now known to be the same object type
 280          * (Both are Integer, String, or Buffer), and we can now perform the
 281          * concatenation.
 282          */
 283
 284         /*
 285          * There are three cases to handle:
 286          *
 287          * 1) Two Integers concatenated to produce a new Buffer
 288          * 2) Two Strings concatenated to produce a new String
 289          * 3) Two Buffers concatenated to produce a new Buffer
 290          */
 291         switch (ACPI_GET_OBJECT_TYPE(operand0)) {
 292         case ACPI_TYPE_INTEGER:
 293
 294                 /* Result of two Integers is a Buffer */
 295                 /* Need enough buffer space for two integers */
 296
 297                 return_desc = acpi_ut_create_buffer_object((acpi_size)
 298                                                            ACPI_MUL_2
 299                                                            (acpi_gbl_integer_byte_width));
 300                 if (!return_desc) {
 301                         status = AE_NO_MEMORY;
 302                         goto cleanup;
 303                 }
 304
 305                 new_buf = (char *)return_desc->buffer.pointer;
 306
 307                 /* Copy the first integer, LSB first */
 308
 309                 ACPI_MEMCPY(new_buf, &operand0->integer.value,
 310                             acpi_gbl_integer_byte_width);
 311
 312                 /* Copy the second integer (LSB first) after the first */
 313
 314                 ACPI_MEMCPY(new_buf + acpi_gbl_integer_byte_width,
 315                             &local_operand1->integer.value,
 316                             acpi_gbl_integer_byte_width);
 317                 break;
 318
 319         case ACPI_TYPE_STRING:
 320
 321                 /* Result of two Strings is a String */
 322
 323                 return_desc = acpi_ut_create_string_object((acpi_size)
 324                                                            (operand0->string.
 325                                                             length +
 326                                                             local_operand1->
 327                                                             string.length));
 328                 if (!return_desc) {
 329                         status = AE_NO_MEMORY;
 330                         goto cleanup;
 331                 }
 332
 333                 new_buf = return_desc->string.pointer;
 334
 335                 /* Concatenate the strings */
 336
 337                 ACPI_STRCPY(new_buf, operand0->string.pointer);
 338                 ACPI_STRCPY(new_buf + operand0->string.length,
 339                             local_operand1->string.pointer);
 340                 break;
 341
 342         case ACPI_TYPE_BUFFER:
 343
 344                 /* Result of two Buffers is a Buffer */
 345
 346                 return_desc = acpi_ut_create_buffer_object((acpi_size)
 347                                                            (operand0->buffer.
 348                                                             length +
 349                                                             local_operand1->
 350                                                             buffer.length));
 351                 if (!return_desc) {
 352                         status = AE_NO_MEMORY;
 353                         goto cleanup;
 354                 }
 355
 356                 new_buf = (char *)return_desc->buffer.pointer;
 357
 358                 /* Concatenate the buffers */
 359
 360                 ACPI_MEMCPY(new_buf, operand0->buffer.pointer,
 361                             operand0->buffer.length);
 362                 ACPI_MEMCPY(new_buf + operand0->buffer.length,
 363                             local_operand1->buffer.pointer,
 364                             local_operand1->buffer.length);
 365                 break;
 366
 367         default:
 368
 369                 /* Invalid object type, should not happen here */
 370
 371                 ACPI_REPORT_ERROR(("Concatenate - Invalid object type: %X\n",
 372                                    ACPI_GET_OBJECT_TYPE(operand0)));
 373                 status = AE_AML_INTERNAL;
 374                 goto cleanup;
 375         }
 376
 377         *actual_return_desc = return_desc;
 378
 379       cleanup:
 380         if (local_operand1 != operand1) {
 381                 acpi_ut_remove_reference(local_operand1);
 382         }
 383         return_ACPI_STATUS(status);
 384 }
 385
 386 /*******************************************************************************
 387  *
 388  * FUNCTION:    acpi_ex_do_math_op
 389  *
 390  * PARAMETERS:  Opcode              - AML opcode
 391  *              Integer0            - Integer operand #0
 392  *              Integer1            - Integer operand #1
 393  *
 394  * RETURN:      Integer result of the operation
 395  *
 396  * DESCRIPTION: Execute a math AML opcode. The purpose of having all of the
 397  *              math functions here is to prevent a lot of pointer dereferencing
 398  *              to obtain the operands.
 399  *
 400  ******************************************************************************/
 401
 402 acpi_integer
 403 acpi_ex_do_math_op(u16 opcode, acpi_integer integer0, acpi_integer integer1)
 404 {
 405
 406         ACPI_FUNCTION_ENTRY();
 407
 408         switch (opcode) {
 409         case AML_ADD_OP:        /* Add (Integer0, Integer1, Result) */
 410
 411                 return (integer0 + integer1);
 412
 413         case AML_BIT_AND_OP:    /* And (Integer0, Integer1, Result) */
 414
 415                 return (integer0 & integer1);
 416
 417         case AML_BIT_NAND_OP:   /* NAnd (Integer0, Integer1, Result) */
 418
 419                 return (~(integer0 & integer1));
 420
 421         case AML_BIT_OR_OP:     /* Or (Integer0, Integer1, Result) */
 422
 423                 return (integer0 | integer1);
 424
 425         case AML_BIT_NOR_OP:    /* NOr (Integer0, Integer1, Result) */
 426
 427                 return (~(integer0 | integer1));
 428
 429         case AML_BIT_XOR_OP:    /* XOr (Integer0, Integer1, Result) */
 430
 431                 return (integer0 ^ integer1);
 432
 433         case AML_MULTIPLY_OP:   /* Multiply (Integer0, Integer1, Result) */
 434
 435                 return (integer0 * integer1);
 436
 437         case AML_SHIFT_LEFT_OP: /* shift_left (Operand, shift_count, Result) */
 438
 439                 return (integer0 << integer1);
 440
 441         case AML_SHIFT_RIGHT_OP:        /* shift_right (Operand, shift_count, Result) */
 442
 443                 return (integer0 >> integer1);
 444
 445         case AML_SUBTRACT_OP:   /* Subtract (Integer0, Integer1, Result) */
 446
 447                 return (integer0 - integer1);
 448
 449         default:
 450
 451                 return (0);
 452         }
 453 }
 454
 455 /*******************************************************************************
 456  *
 457  * FUNCTION:    acpi_ex_do_logical_numeric_op
 458  *
 459  * PARAMETERS:  Opcode              - AML opcode
 460  *              Integer0            - Integer operand #0
 461  *              Integer1            - Integer operand #1
 462  *              logical_result      - TRUE/FALSE result of the operation
 463  *
 464  * RETURN:      Status
 465  *
 466  * DESCRIPTION: Execute a logical "Numeric" AML opcode. For these Numeric
 467  *              operators (LAnd and LOr), both operands must be integers.
 468  *
 469  *              Note: cleanest machine code seems to be produced by the code
 470  *              below, rather than using statements of the form:
 471  *                  Result = (Integer0 && Integer1);
 472  *
 473  ******************************************************************************/
 474
 475 acpi_status
 476 acpi_ex_do_logical_numeric_op(u16 opcode,
 477                               acpi_integer integer0,
 478                               acpi_integer integer1, u8 * logical_result)
 479 {
 480         acpi_status status = AE_OK;
 481         u8 local_result = FALSE;
 482
 483         ACPI_FUNCTION_TRACE("ex_do_logical_numeric_op");
 484
 485         switch (opcode) {
 486         case AML_LAND_OP:       /* LAnd (Integer0, Integer1) */
 487
 488                 if (integer0 && integer1) {
 489                         local_result = TRUE;
 490                 }
 491                 break;
 492
 493         case AML_LOR_OP:        /* LOr (Integer0, Integer1) */
 494
 495                 if (integer0 || integer1) {
 496                         local_result = TRUE;
 497                 }
 498                 break;
 499
 500         default:
 501                 status = AE_AML_INTERNAL;
 502                 break;
 503         }
 504
 505         /* Return the logical result and status */
 506
 507         *logical_result = local_result;
 508         return_ACPI_STATUS(status);
 509 }
 510
 511 /*******************************************************************************
 512  *
 513  * FUNCTION:    acpi_ex_do_logical_op
 514  *
 515  * PARAMETERS:  Opcode              - AML opcode
 516  *              Operand0            - operand #0
 517  *              Operand1            - operand #1
 518  *              logical_result      - TRUE/FALSE result of the operation
 519  *
 520  * RETURN:      Status
 521  *
 522  * DESCRIPTION: Execute a logical AML opcode. The purpose of having all of the
 523  *              functions here is to prevent a lot of pointer dereferencing
 524  *              to obtain the operands and to simplify the generation of the
 525  *              logical value. For the Numeric operators (LAnd and LOr), both
 526  *              operands must be integers. For the other logical operators,
 527  *              operands can be any combination of Integer/String/Buffer. The
 528  *              first operand determines the type to which the second operand
 529  *              will be converted.
 530  *
 531  *              Note: cleanest machine code seems to be produced by the code
 532  *              below, rather than using statements of the form:
 533  *                  Result = (Operand0 == Operand1);
 534  *
 535  ******************************************************************************/
 536
 537 acpi_status
 538 acpi_ex_do_logical_op(u16 opcode,
 539                       union acpi_operand_object *operand0,
 540                       union acpi_operand_object *operand1, u8 * logical_result)
 541 {
 542         union acpi_operand_object *local_operand1 = operand1;
 543         acpi_integer integer0;
 544         acpi_integer integer1;
 545         u32 length0;
 546         u32 length1;
 547         acpi_status status = AE_OK;
 548         u8 local_result = FALSE;
 549         int compare;
 550
 551         ACPI_FUNCTION_TRACE("ex_do_logical_op");
 552
 553         /*
 554          * Convert the second operand if necessary.  The first operand
 555          * determines the type of the second operand, (See the Data Types
 556          * section of the ACPI 3.0+ specification.)  Both object types are
 557          * guaranteed to be either Integer/String/Buffer by the operand
 558          * resolution mechanism.
 559          */
 560         switch (ACPI_GET_OBJECT_TYPE(operand0)) {
 561         case ACPI_TYPE_INTEGER:
 562                 status =
 563                     acpi_ex_convert_to_integer(operand1, &local_operand1, 16);
 564                 break;
 565
 566         case ACPI_TYPE_STRING:
 567                 status = acpi_ex_convert_to_string(operand1, &local_operand1,
 568                                                    ACPI_IMPLICIT_CONVERT_HEX);
 569                 break;
 570
 571         case ACPI_TYPE_BUFFER:
 572                 status = acpi_ex_convert_to_buffer(operand1, &local_operand1);
 573                 break;
 574
 575         default:
 576                 status = AE_AML_INTERNAL;
 577                 break;
 578         }
 579
 580         if (ACPI_FAILURE(status)) {
 581                 goto cleanup;
 582         }
 583
 584         /*
 585          * Two cases: 1) Both Integers, 2) Both Strings or Buffers
 586          */
 587         if (ACPI_GET_OBJECT_TYPE(operand0) == ACPI_TYPE_INTEGER) {
 588                 /*
 589                  * 1) Both operands are of type integer
 590                  *    Note: local_operand1 may have changed above
 591                  */
 592                 integer0 = operand0->integer.value;
 593                 integer1 = local_operand1->integer.value;
 594
 595                 switch (opcode) {
 596                 case AML_LEQUAL_OP:     /* LEqual (Operand0, Operand1) */
 597
 598                         if (integer0 == integer1) {
 599                                 local_result = TRUE;
 600                         }
 601                         break;
 602
 603                 case AML_LGREATER_OP:   /* LGreater (Operand0, Operand1) */
 604
 605                         if (integer0 > integer1) {
 606                                 local_result = TRUE;
 607                         }
 608                         break;
 609
 610                 case AML_LLESS_OP:      /* LLess (Operand0, Operand1) */
 611
 612                         if (integer0 < integer1) {
 613                                 local_result = TRUE;
 614                         }
 615                         break;
 616
 617                 default:
 618                         status = AE_AML_INTERNAL;
 619                         break;
 620                 }
 621         } else {
 622                 /*
 623                  * 2) Both operands are Strings or both are Buffers
 624                  *    Note: Code below takes advantage of common Buffer/String
 625                  *          object fields. local_operand1 may have changed above. Use
 626                  *          memcmp to handle nulls in buffers.
 627                  */
 628                 length0 = operand0->buffer.length;
 629                 length1 = local_operand1->buffer.length;
 630
 631                 /* Lexicographic compare: compare the data bytes */
 632
 633                 compare = ACPI_MEMCMP(operand0->buffer.pointer,
 634                                       local_operand1->buffer.pointer,
 635                                       (length0 > length1) ? length1 : length0);
 636
 637                 switch (opcode) {
 638                 case AML_LEQUAL_OP:     /* LEqual (Operand0, Operand1) */
 639
 640                         /* Length and all bytes must be equal */
 641
 642                         if ((length0 == length1) && (compare == 0)) {
 643                                 /* Length and all bytes match ==> TRUE */
 644
 645                                 local_result = TRUE;
 646                         }
 647                         break;
 648
 649                 case AML_LGREATER_OP:   /* LGreater (Operand0, Operand1) */
 650
 651                         if (compare > 0) {
 652                                 local_result = TRUE;
 653                                 goto cleanup;   /* TRUE */
 654                         }
 655                         if (compare < 0) {
 656                                 goto cleanup;   /* FALSE */
 657                         }
 658
 659                         /* Bytes match (to shortest length), compare lengths */
 660
 661                         if (length0 > length1) {
 662                                 local_result = TRUE;
 663                         }
 664                         break;
 665
 666                 case AML_LLESS_OP:      /* LLess (Operand0, Operand1) */
 667
 668                         if (compare > 0) {
 669                                 goto cleanup;   /* FALSE */
 670                         }
 671                         if (compare < 0) {
 672                                 local_result = TRUE;
 673                                 goto cleanup;   /* TRUE */
 674                         }
 675
 676                         /* Bytes match (to shortest length), compare lengths */
 677
 678                         if (length0 < length1) {
 679                                 local_result = TRUE;
 680                         }
 681                         break;
 682
 683                 default:
 684                         status = AE_AML_INTERNAL;
 685                         break;
 686                 }
 687         }
 688
 689       cleanup:
 690
 691         /* New object was created if implicit conversion performed - delete */
 692
 693         if (local_operand1 != operand1) {
 694                 acpi_ut_remove_reference(local_operand1);
 695         }
 696
 697         /* Return the logical result and status */
 698
 699         *logical_result = local_result;
 700         return_ACPI_STATUS(status);
 701 }