V4L/DVB (9744): em28xx: cleanup XCLK register usage
[linux-2.6] / drivers / acpi / executer / exmisc.c
1
2 /******************************************************************************
3  *
4  * Module Name: exmisc - ACPI AML (p-code) execution - specific opcodes
5  *
6  *****************************************************************************/
7
8 /*
9  * Copyright (C) 2000 - 2008, Intel Corp.
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.class) {
90                 case ACPI_REFCLASS_LOCAL:
91                 case ACPI_REFCLASS_ARG:
92                 case ACPI_REFCLASS_DEBUG:
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_ERROR((AE_INFO, "Unknown Reference Class %2.2X",
102                                     obj_desc->reference.class));
103                         return_ACPI_STATUS(AE_AML_INTERNAL);
104                 }
105                 break;
106
107         case ACPI_DESC_TYPE_NAMED:
108
109                 /*
110                  * A named reference that has already been resolved to a Node
111                  */
112                 referenced_obj = obj_desc;
113                 break;
114
115         default:
116
117                 ACPI_ERROR((AE_INFO, "Invalid descriptor type %X",
118                             ACPI_GET_DESCRIPTOR_TYPE(obj_desc)));
119                 return_ACPI_STATUS(AE_TYPE);
120         }
121
122         /* Create a new reference object */
123
124         reference_obj =
125             acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_REFERENCE);
126         if (!reference_obj) {
127                 return_ACPI_STATUS(AE_NO_MEMORY);
128         }
129
130         reference_obj->reference.class = ACPI_REFCLASS_REFOF;
131         reference_obj->reference.object = referenced_obj;
132         *return_desc = reference_obj;
133
134         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
135                           "Object %p Type [%s], returning Reference %p\n",
136                           obj_desc, acpi_ut_get_object_type_name(obj_desc),
137                           *return_desc));
138
139         return_ACPI_STATUS(AE_OK);
140 }
141
142 /*******************************************************************************
143  *
144  * FUNCTION:    acpi_ex_concat_template
145  *
146  * PARAMETERS:  Operand0            - First source object
147  *              Operand1            - Second source object
148  *              actual_return_desc  - Where to place the return object
149  *              walk_state          - Current walk state
150  *
151  * RETURN:      Status
152  *
153  * DESCRIPTION: Concatenate two resource templates
154  *
155  ******************************************************************************/
156
157 acpi_status
158 acpi_ex_concat_template(union acpi_operand_object *operand0,
159                         union acpi_operand_object *operand1,
160                         union acpi_operand_object **actual_return_desc,
161                         struct acpi_walk_state *walk_state)
162 {
163         acpi_status status;
164         union acpi_operand_object *return_desc;
165         u8 *new_buf;
166         u8 *end_tag;
167         acpi_size length0;
168         acpi_size length1;
169         acpi_size new_length;
170
171         ACPI_FUNCTION_TRACE(ex_concat_template);
172
173         /*
174          * Find the end_tag descriptor in each resource template.
175          * Note1: returned pointers point TO the end_tag, not past it.
176          * Note2: zero-length buffers are allowed; treated like one end_tag
177          */
178
179         /* Get the length of the first resource template */
180
181         status = acpi_ut_get_resource_end_tag(operand0, &end_tag);
182         if (ACPI_FAILURE(status)) {
183                 return_ACPI_STATUS(status);
184         }
185
186         length0 = ACPI_PTR_DIFF(end_tag, operand0->buffer.pointer);
187
188         /* Get the length of the second resource template */
189
190         status = acpi_ut_get_resource_end_tag(operand1, &end_tag);
191         if (ACPI_FAILURE(status)) {
192                 return_ACPI_STATUS(status);
193         }
194
195         length1 = ACPI_PTR_DIFF(end_tag, operand1->buffer.pointer);
196
197         /* Combine both lengths, minimum size will be 2 for end_tag */
198
199         new_length = length0 + length1 + sizeof(struct aml_resource_end_tag);
200
201         /* Create a new buffer object for the result (with one end_tag) */
202
203         return_desc = acpi_ut_create_buffer_object(new_length);
204         if (!return_desc) {
205                 return_ACPI_STATUS(AE_NO_MEMORY);
206         }
207
208         /*
209          * Copy the templates to the new buffer, 0 first, then 1 follows. One
210          * end_tag descriptor is copied from Operand1.
211          */
212         new_buf = return_desc->buffer.pointer;
213         ACPI_MEMCPY(new_buf, operand0->buffer.pointer, length0);
214         ACPI_MEMCPY(new_buf + length0, operand1->buffer.pointer, length1);
215
216         /* Insert end_tag and set the checksum to zero, means "ignore checksum" */
217
218         new_buf[new_length - 1] = 0;
219         new_buf[new_length - 2] = ACPI_RESOURCE_NAME_END_TAG | 1;
220
221         /* Return the completed resource template */
222
223         *actual_return_desc = return_desc;
224         return_ACPI_STATUS(AE_OK);
225 }
226
227 /*******************************************************************************
228  *
229  * FUNCTION:    acpi_ex_do_concatenate
230  *
231  * PARAMETERS:  Operand0            - First source object
232  *              Operand1            - Second source object
233  *              actual_return_desc  - Where to place the return object
234  *              walk_state          - Current walk state
235  *
236  * RETURN:      Status
237  *
238  * DESCRIPTION: Concatenate two objects OF THE SAME TYPE.
239  *
240  ******************************************************************************/
241
242 acpi_status
243 acpi_ex_do_concatenate(union acpi_operand_object *operand0,
244                        union acpi_operand_object *operand1,
245                        union acpi_operand_object **actual_return_desc,
246                        struct acpi_walk_state *walk_state)
247 {
248         union acpi_operand_object *local_operand1 = operand1;
249         union acpi_operand_object *return_desc;
250         char *new_buf;
251         acpi_status status;
252
253         ACPI_FUNCTION_TRACE(ex_do_concatenate);
254
255         /*
256          * Convert the second operand if necessary.  The first operand
257          * determines the type of the second operand, (See the Data Types
258          * section of the ACPI specification.)  Both object types are
259          * guaranteed to be either Integer/String/Buffer by the operand
260          * resolution mechanism.
261          */
262         switch (ACPI_GET_OBJECT_TYPE(operand0)) {
263         case ACPI_TYPE_INTEGER:
264                 status =
265                     acpi_ex_convert_to_integer(operand1, &local_operand1, 16);
266                 break;
267
268         case ACPI_TYPE_STRING:
269                 status = acpi_ex_convert_to_string(operand1, &local_operand1,
270                                                    ACPI_IMPLICIT_CONVERT_HEX);
271                 break;
272
273         case ACPI_TYPE_BUFFER:
274                 status = acpi_ex_convert_to_buffer(operand1, &local_operand1);
275                 break;
276
277         default:
278                 ACPI_ERROR((AE_INFO, "Invalid object type: %X",
279                             ACPI_GET_OBJECT_TYPE(operand0)));
280                 status = AE_AML_INTERNAL;
281         }
282
283         if (ACPI_FAILURE(status)) {
284                 goto cleanup;
285         }
286
287         /*
288          * Both operands are now known to be the same object type
289          * (Both are Integer, String, or Buffer), and we can now perform the
290          * concatenation.
291          */
292
293         /*
294          * There are three cases to handle:
295          *
296          * 1) Two Integers concatenated to produce a new Buffer
297          * 2) Two Strings concatenated to produce a new String
298          * 3) Two Buffers concatenated to produce a new Buffer
299          */
300         switch (ACPI_GET_OBJECT_TYPE(operand0)) {
301         case ACPI_TYPE_INTEGER:
302
303                 /* Result of two Integers is a Buffer */
304                 /* Need enough buffer space for two integers */
305
306                 return_desc = acpi_ut_create_buffer_object((acpi_size)
307                                                            ACPI_MUL_2
308                                                            (acpi_gbl_integer_byte_width));
309                 if (!return_desc) {
310                         status = AE_NO_MEMORY;
311                         goto cleanup;
312                 }
313
314                 new_buf = (char *)return_desc->buffer.pointer;
315
316                 /* Copy the first integer, LSB first */
317
318                 ACPI_MEMCPY(new_buf, &operand0->integer.value,
319                             acpi_gbl_integer_byte_width);
320
321                 /* Copy the second integer (LSB first) after the first */
322
323                 ACPI_MEMCPY(new_buf + acpi_gbl_integer_byte_width,
324                             &local_operand1->integer.value,
325                             acpi_gbl_integer_byte_width);
326                 break;
327
328         case ACPI_TYPE_STRING:
329
330                 /* Result of two Strings is a String */
331
332                 return_desc = acpi_ut_create_string_object(((acpi_size)
333                                                             operand0->string.
334                                                             length +
335                                                             local_operand1->
336                                                             string.length));
337                 if (!return_desc) {
338                         status = AE_NO_MEMORY;
339                         goto cleanup;
340                 }
341
342                 new_buf = return_desc->string.pointer;
343
344                 /* Concatenate the strings */
345
346                 ACPI_STRCPY(new_buf, operand0->string.pointer);
347                 ACPI_STRCPY(new_buf + operand0->string.length,
348                             local_operand1->string.pointer);
349                 break;
350
351         case ACPI_TYPE_BUFFER:
352
353                 /* Result of two Buffers is a Buffer */
354
355                 return_desc = acpi_ut_create_buffer_object(((acpi_size)
356                                                             operand0->buffer.
357                                                             length +
358                                                             local_operand1->
359                                                             buffer.length));
360                 if (!return_desc) {
361                         status = AE_NO_MEMORY;
362                         goto cleanup;
363                 }
364
365                 new_buf = (char *)return_desc->buffer.pointer;
366
367                 /* Concatenate the buffers */
368
369                 ACPI_MEMCPY(new_buf, operand0->buffer.pointer,
370                             operand0->buffer.length);
371                 ACPI_MEMCPY(new_buf + operand0->buffer.length,
372                             local_operand1->buffer.pointer,
373                             local_operand1->buffer.length);
374                 break;
375
376         default:
377
378                 /* Invalid object type, should not happen here */
379
380                 ACPI_ERROR((AE_INFO, "Invalid object type: %X",
381                             ACPI_GET_OBJECT_TYPE(operand0)));
382                 status = AE_AML_INTERNAL;
383                 goto cleanup;
384         }
385
386         *actual_return_desc = return_desc;
387
388       cleanup:
389         if (local_operand1 != operand1) {
390                 acpi_ut_remove_reference(local_operand1);
391         }
392         return_ACPI_STATUS(status);
393 }
394
395 /*******************************************************************************
396  *
397  * FUNCTION:    acpi_ex_do_math_op
398  *
399  * PARAMETERS:  Opcode              - AML opcode
400  *              Integer0            - Integer operand #0
401  *              Integer1            - Integer operand #1
402  *
403  * RETURN:      Integer result of the operation
404  *
405  * DESCRIPTION: Execute a math AML opcode. The purpose of having all of the
406  *              math functions here is to prevent a lot of pointer dereferencing
407  *              to obtain the operands.
408  *
409  ******************************************************************************/
410
411 acpi_integer
412 acpi_ex_do_math_op(u16 opcode, acpi_integer integer0, acpi_integer integer1)
413 {
414
415         ACPI_FUNCTION_ENTRY();
416
417         switch (opcode) {
418         case AML_ADD_OP:        /* Add (Integer0, Integer1, Result) */
419
420                 return (integer0 + integer1);
421
422         case AML_BIT_AND_OP:    /* And (Integer0, Integer1, Result) */
423
424                 return (integer0 & integer1);
425
426         case AML_BIT_NAND_OP:   /* NAnd (Integer0, Integer1, Result) */
427
428                 return (~(integer0 & integer1));
429
430         case AML_BIT_OR_OP:     /* Or (Integer0, Integer1, Result) */
431
432                 return (integer0 | integer1);
433
434         case AML_BIT_NOR_OP:    /* NOr (Integer0, Integer1, Result) */
435
436                 return (~(integer0 | integer1));
437
438         case AML_BIT_XOR_OP:    /* XOr (Integer0, Integer1, Result) */
439
440                 return (integer0 ^ integer1);
441
442         case AML_MULTIPLY_OP:   /* Multiply (Integer0, Integer1, Result) */
443
444                 return (integer0 * integer1);
445
446         case AML_SHIFT_LEFT_OP: /* shift_left (Operand, shift_count, Result) */
447
448                 /*
449                  * We need to check if the shiftcount is larger than the integer bit
450                  * width since the behavior of this is not well-defined in the C language.
451                  */
452                 if (integer1 >= acpi_gbl_integer_bit_width) {
453                         return (0);
454                 }
455                 return (integer0 << integer1);
456
457         case AML_SHIFT_RIGHT_OP:        /* shift_right (Operand, shift_count, Result) */
458
459                 /*
460                  * We need to check if the shiftcount is larger than the integer bit
461                  * width since the behavior of this is not well-defined in the C language.
462                  */
463                 if (integer1 >= acpi_gbl_integer_bit_width) {
464                         return (0);
465                 }
466                 return (integer0 >> integer1);
467
468         case AML_SUBTRACT_OP:   /* Subtract (Integer0, Integer1, Result) */
469
470                 return (integer0 - integer1);
471
472         default:
473
474                 return (0);
475         }
476 }
477
478 /*******************************************************************************
479  *
480  * FUNCTION:    acpi_ex_do_logical_numeric_op
481  *
482  * PARAMETERS:  Opcode              - AML opcode
483  *              Integer0            - Integer operand #0
484  *              Integer1            - Integer operand #1
485  *              logical_result      - TRUE/FALSE result of the operation
486  *
487  * RETURN:      Status
488  *
489  * DESCRIPTION: Execute a logical "Numeric" AML opcode. For these Numeric
490  *              operators (LAnd and LOr), both operands must be integers.
491  *
492  *              Note: cleanest machine code seems to be produced by the code
493  *              below, rather than using statements of the form:
494  *                  Result = (Integer0 && Integer1);
495  *
496  ******************************************************************************/
497
498 acpi_status
499 acpi_ex_do_logical_numeric_op(u16 opcode,
500                               acpi_integer integer0,
501                               acpi_integer integer1, u8 * logical_result)
502 {
503         acpi_status status = AE_OK;
504         u8 local_result = FALSE;
505
506         ACPI_FUNCTION_TRACE(ex_do_logical_numeric_op);
507
508         switch (opcode) {
509         case AML_LAND_OP:       /* LAnd (Integer0, Integer1) */
510
511                 if (integer0 && integer1) {
512                         local_result = TRUE;
513                 }
514                 break;
515
516         case AML_LOR_OP:        /* LOr (Integer0, Integer1) */
517
518                 if (integer0 || integer1) {
519                         local_result = TRUE;
520                 }
521                 break;
522
523         default:
524                 status = AE_AML_INTERNAL;
525                 break;
526         }
527
528         /* Return the logical result and status */
529
530         *logical_result = local_result;
531         return_ACPI_STATUS(status);
532 }
533
534 /*******************************************************************************
535  *
536  * FUNCTION:    acpi_ex_do_logical_op
537  *
538  * PARAMETERS:  Opcode              - AML opcode
539  *              Operand0            - operand #0
540  *              Operand1            - operand #1
541  *              logical_result      - TRUE/FALSE result of the operation
542  *
543  * RETURN:      Status
544  *
545  * DESCRIPTION: Execute a logical AML opcode. The purpose of having all of the
546  *              functions here is to prevent a lot of pointer dereferencing
547  *              to obtain the operands and to simplify the generation of the
548  *              logical value. For the Numeric operators (LAnd and LOr), both
549  *              operands must be integers. For the other logical operators,
550  *              operands can be any combination of Integer/String/Buffer. The
551  *              first operand determines the type to which the second operand
552  *              will be converted.
553  *
554  *              Note: cleanest machine code seems to be produced by the code
555  *              below, rather than using statements of the form:
556  *                  Result = (Operand0 == Operand1);
557  *
558  ******************************************************************************/
559
560 acpi_status
561 acpi_ex_do_logical_op(u16 opcode,
562                       union acpi_operand_object *operand0,
563                       union acpi_operand_object *operand1, u8 * logical_result)
564 {
565         union acpi_operand_object *local_operand1 = operand1;
566         acpi_integer integer0;
567         acpi_integer integer1;
568         u32 length0;
569         u32 length1;
570         acpi_status status = AE_OK;
571         u8 local_result = FALSE;
572         int compare;
573
574         ACPI_FUNCTION_TRACE(ex_do_logical_op);
575
576         /*
577          * Convert the second operand if necessary.  The first operand
578          * determines the type of the second operand, (See the Data Types
579          * section of the ACPI 3.0+ specification.)  Both object types are
580          * guaranteed to be either Integer/String/Buffer by the operand
581          * resolution mechanism.
582          */
583         switch (ACPI_GET_OBJECT_TYPE(operand0)) {
584         case ACPI_TYPE_INTEGER:
585                 status =
586                     acpi_ex_convert_to_integer(operand1, &local_operand1, 16);
587                 break;
588
589         case ACPI_TYPE_STRING:
590                 status = acpi_ex_convert_to_string(operand1, &local_operand1,
591                                                    ACPI_IMPLICIT_CONVERT_HEX);
592                 break;
593
594         case ACPI_TYPE_BUFFER:
595                 status = acpi_ex_convert_to_buffer(operand1, &local_operand1);
596                 break;
597
598         default:
599                 status = AE_AML_INTERNAL;
600                 break;
601         }
602
603         if (ACPI_FAILURE(status)) {
604                 goto cleanup;
605         }
606
607         /*
608          * Two cases: 1) Both Integers, 2) Both Strings or Buffers
609          */
610         if (ACPI_GET_OBJECT_TYPE(operand0) == ACPI_TYPE_INTEGER) {
611                 /*
612                  * 1) Both operands are of type integer
613                  *    Note: local_operand1 may have changed above
614                  */
615                 integer0 = operand0->integer.value;
616                 integer1 = local_operand1->integer.value;
617
618                 switch (opcode) {
619                 case AML_LEQUAL_OP:     /* LEqual (Operand0, Operand1) */
620
621                         if (integer0 == integer1) {
622                                 local_result = TRUE;
623                         }
624                         break;
625
626                 case AML_LGREATER_OP:   /* LGreater (Operand0, Operand1) */
627
628                         if (integer0 > integer1) {
629                                 local_result = TRUE;
630                         }
631                         break;
632
633                 case AML_LLESS_OP:      /* LLess (Operand0, Operand1) */
634
635                         if (integer0 < integer1) {
636                                 local_result = TRUE;
637                         }
638                         break;
639
640                 default:
641                         status = AE_AML_INTERNAL;
642                         break;
643                 }
644         } else {
645                 /*
646                  * 2) Both operands are Strings or both are Buffers
647                  *    Note: Code below takes advantage of common Buffer/String
648                  *          object fields. local_operand1 may have changed above. Use
649                  *          memcmp to handle nulls in buffers.
650                  */
651                 length0 = operand0->buffer.length;
652                 length1 = local_operand1->buffer.length;
653
654                 /* Lexicographic compare: compare the data bytes */
655
656                 compare = ACPI_MEMCMP(operand0->buffer.pointer,
657                                       local_operand1->buffer.pointer,
658                                       (length0 > length1) ? length1 : length0);
659
660                 switch (opcode) {
661                 case AML_LEQUAL_OP:     /* LEqual (Operand0, Operand1) */
662
663                         /* Length and all bytes must be equal */
664
665                         if ((length0 == length1) && (compare == 0)) {
666
667                                 /* Length and all bytes match ==> TRUE */
668
669                                 local_result = TRUE;
670                         }
671                         break;
672
673                 case AML_LGREATER_OP:   /* LGreater (Operand0, Operand1) */
674
675                         if (compare > 0) {
676                                 local_result = TRUE;
677                                 goto cleanup;   /* TRUE */
678                         }
679                         if (compare < 0) {
680                                 goto cleanup;   /* FALSE */
681                         }
682
683                         /* Bytes match (to shortest length), compare lengths */
684
685                         if (length0 > length1) {
686                                 local_result = TRUE;
687                         }
688                         break;
689
690                 case AML_LLESS_OP:      /* LLess (Operand0, Operand1) */
691
692                         if (compare > 0) {
693                                 goto cleanup;   /* FALSE */
694                         }
695                         if (compare < 0) {
696                                 local_result = TRUE;
697                                 goto cleanup;   /* TRUE */
698                         }
699
700                         /* Bytes match (to shortest length), compare lengths */
701
702                         if (length0 < length1) {
703                                 local_result = TRUE;
704                         }
705                         break;
706
707                 default:
708                         status = AE_AML_INTERNAL;
709                         break;
710                 }
711         }
712
713       cleanup:
714
715         /* New object was created if implicit conversion performed - delete */
716
717         if (local_operand1 != operand1) {
718                 acpi_ut_remove_reference(local_operand1);
719         }
720
721         /* Return the logical result and status */
722
723         *logical_result = local_result;
724         return_ACPI_STATUS(status);
725 }