acpica/executer/exmisc.c

0001 /******************************************************************************
0002  *
0003  * Module Name: exmisc - ACPI AML (p-code) execution - specific opcodes
0004  *
0005  *****************************************************************************/
0006
0007 /******************************************************************************
0008  *
0009  * 1. Copyright Notice
0010  *
0011  * Some or all of this work - Copyright (c) 1999 - 2024, Intel Corp.
0012  * All rights reserved.
0013  *
0014  * 2. License
0015  *
0016  * 2.1. This is your license from Intel Corp. under its intellectual property
0017  * rights. You may have additional license terms from the party that provided
0018  * you this software, covering your right to use that party's intellectual
0019  * property rights.
0020  *
0021  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
0022  * copy of the source code appearing in this file ("Covered Code") an
0023  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
0024  * base code distributed originally by Intel ("Original Intel Code") to copy,
0025  * make derivatives, distribute, use and display any portion of the Covered
0026  * Code in any form, with the right to sublicense such rights; and
0027  *
0028  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
0029  * license (with the right to sublicense), under only those claims of Intel
0030  * patents that are infringed by the Original Intel Code, to make, use, sell,
0031  * offer to sell, and import the Covered Code and derivative works thereof
0032  * solely to the minimum extent necessary to exercise the above copyright
0033  * license, and in no event shall the patent license extend to any additions
0034  * to or modifications of the Original Intel Code. No other license or right
0035  * is granted directly or by implication, estoppel or otherwise;
0036  *
0037  * The above copyright and patent license is granted only if the following
0038  * conditions are met:
0039  *
0040  * 3. Conditions
0041  *
0042  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
0043  * Redistribution of source code of any substantial portion of the Covered
0044  * Code or modification with rights to further distribute source must include
0045  * the above Copyright Notice, the above License, this list of Conditions,
0046  * and the following Disclaimer and Export Compliance provision. In addition,
0047  * Licensee must cause all Covered Code to which Licensee contributes to
0048  * contain a file documenting the changes Licensee made to create that Covered
0049  * Code and the date of any change. Licensee must include in that file the
0050  * documentation of any changes made by any predecessor Licensee. Licensee
0051  * must include a prominent statement that the modification is derived,
0052  * directly or indirectly, from Original Intel Code.
0053  *
0054  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
0055  * Redistribution of source code of any substantial portion of the Covered
0056  * Code or modification without rights to further distribute source must
0057  * include the following Disclaimer and Export Compliance provision in the
0058  * documentation and/or other materials provided with distribution. In
0059  * addition, Licensee may not authorize further sublicense of source of any
0060  * portion of the Covered Code, and must include terms to the effect that the
0061  * license from Licensee to its licensee is limited to the intellectual
0062  * property embodied in the software Licensee provides to its licensee, and
0063  * not to intellectual property embodied in modifications its licensee may
0064  * make.
0065  *
0066  * 3.3. Redistribution of Executable. Redistribution in executable form of any
0067  * substantial portion of the Covered Code or modification must reproduce the
0068  * above Copyright Notice, and the following Disclaimer and Export Compliance
0069  * provision in the documentation and/or other materials provided with the
0070  * distribution.
0071  *
0072  * 3.4. Intel retains all right, title, and interest in and to the Original
0073  * Intel Code.
0074  *
0075  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
0076  * Intel shall be used in advertising or otherwise to promote the sale, use or
0077  * other dealings in products derived from or relating to the Covered Code
0078  * without prior written authorization from Intel.
0079  *
0080  * 4. Disclaimer and Export Compliance
0081  *
0082  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
0083  * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
0084  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
0085  * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
0086
0087  * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
0088  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
0089  * PARTICULAR PURPOSE.
0090  *
0091  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
0092  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
0093  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
0094  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
0095  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
0096  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
0097  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
0098  * LIMITED REMEDY.
0099  *
0100  * 4.3. Licensee shall not export, either directly or indirectly, any of this
0101  * software or system incorporating such software without first obtaining any
0102  * required license or other approval from the U. S. Department of Commerce or
0103  * any other agency or department of the United States Government. In the
0104  * event Licensee exports any such software from the United States or
0105  * re-exports any such software from a foreign destination, Licensee shall
0106  * ensure that the distribution and export/re-export of the software is in
0107  * compliance with all laws, regulations, orders, or other restrictions of the
0108  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
0109  * any of its subsidiaries will export/re-export any technical data, process,
0110  * software, or service, directly or indirectly, to any country for which the
0111  * United States government or any agency thereof requires an export license,
0112  * other governmental approval, or letter of assurance, without first obtaining
0113  * such license, approval or letter.
0114  *
0115  *****************************************************************************
0116  *
0117  * Alternatively, you may choose to be licensed under the terms of the
0118  * following license:
0119  *
0120  * Redistribution and use in source and binary forms, with or without
0121  * modification, are permitted provided that the following conditions
0122  * are met:
0123  * 1. Redistributions of source code must retain the above copyright
0124  *    notice, this list of conditions, and the following disclaimer,
0125  *    without modification.
0126  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
0127  *    substantially similar to the "NO WARRANTY" disclaimer below
0128  *    ("Disclaimer") and any redistribution must be conditioned upon
0129  *    including a substantially similar Disclaimer requirement for further
0130  *    binary redistribution.
0131  * 3. Neither the names of the above-listed copyright holders nor the names
0132  *    of any contributors may be used to endorse or promote products derived
0133  *    from this software without specific prior written permission.
0134  *
0135  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
0136  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
0137  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
0138  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
0139  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
0140  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
0141  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
0142  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
0143  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
0144  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
0145  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
0146  *
0147  * Alternatively, you may choose to be licensed under the terms of the
0148  * GNU General Public License ("GPL") version 2 as published by the Free
0149  * Software Foundation.
0150  *
0151  *****************************************************************************/
0152
0153 #include "acpi.h"
0154 #include "accommon.h"
0155 #include "acinterp.h"
0156 #include "amlcode.h"
0157
0158
0159 #define _COMPONENT          ACPI_EXECUTER
0160         ACPI_MODULE_NAME    ("exmisc")
0161
0162
0163 /*******************************************************************************
0164  *
0165  * FUNCTION:    AcpiExGetObjectReference
0166  *
0167  * PARAMETERS:  ObjDesc             - Create a reference to this object
0168  *              ReturnDesc          - Where to store the reference
0169  *              WalkState           - Current state
0170  *
0171  * RETURN:      Status
0172  *
0173  * DESCRIPTION: Obtain and return a "reference" to the target object
0174  *              Common code for the RefOfOp and the CondRefOfOp.
0175  *
0176  ******************************************************************************/
0177
0178 ACPI_STATUS
0179 AcpiExGetObjectReference (
0180     ACPI_OPERAND_OBJECT     *ObjDesc,
0181     ACPI_OPERAND_OBJECT     **ReturnDesc,
0182     ACPI_WALK_STATE         *WalkState)
0183 {
0184     ACPI_OPERAND_OBJECT     *ReferenceObj;
0185     ACPI_OPERAND_OBJECT     *ReferencedObj;
0186
0187
0188     ACPI_FUNCTION_TRACE_PTR (ExGetObjectReference, ObjDesc);
0189
0190
0191     *ReturnDesc = NULL;
0192
0193     switch (ACPI_GET_DESCRIPTOR_TYPE (ObjDesc))
0194     {
0195     case ACPI_DESC_TYPE_OPERAND:
0196
0197         if (ObjDesc->Common.Type != ACPI_TYPE_LOCAL_REFERENCE)
0198         {
0199             return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
0200         }
0201
0202         /*
0203          * Must be a reference to a Local or Arg
0204          */
0205         switch (ObjDesc->Reference.Class)
0206         {
0207         case ACPI_REFCLASS_LOCAL:
0208         case ACPI_REFCLASS_ARG:
0209         case ACPI_REFCLASS_DEBUG:
0210
0211             /* The referenced object is the pseudo-node for the local/arg */
0212
0213             ReferencedObj = ObjDesc->Reference.Object;
0214             break;
0215
0216         default:
0217
0218             ACPI_ERROR ((AE_INFO, "Invalid Reference Class 0x%2.2X",
0219                 ObjDesc->Reference.Class));
0220             return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
0221         }
0222         break;
0223
0224     case ACPI_DESC_TYPE_NAMED:
0225         /*
0226          * A named reference that has already been resolved to a Node
0227          */
0228         ReferencedObj = ObjDesc;
0229         break;
0230
0231     default:
0232
0233         ACPI_ERROR ((AE_INFO, "Invalid descriptor type 0x%X",
0234             ACPI_GET_DESCRIPTOR_TYPE (ObjDesc)));
0235         return_ACPI_STATUS (AE_TYPE);
0236     }
0237
0238
0239     /* Create a new reference object */
0240
0241     ReferenceObj = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_REFERENCE);
0242     if (!ReferenceObj)
0243     {
0244         return_ACPI_STATUS (AE_NO_MEMORY);
0245     }
0246
0247     ReferenceObj->Reference.Class = ACPI_REFCLASS_REFOF;
0248     ReferenceObj->Reference.Object = ReferencedObj;
0249     *ReturnDesc = ReferenceObj;
0250
0251     ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
0252         "Object %p Type [%s], returning Reference %p\n",
0253         ObjDesc, AcpiUtGetObjectTypeName (ObjDesc), *ReturnDesc));
0254
0255     return_ACPI_STATUS (AE_OK);
0256 }
0257
0258
0259 /*******************************************************************************
0260  *
0261  * FUNCTION:    AcpiExDoMathOp
0262  *
0263  * PARAMETERS:  Opcode              - AML opcode
0264  *              Integer0            - Integer operand #0
0265  *              Integer1            - Integer operand #1
0266  *
0267  * RETURN:      Integer result of the operation
0268  *
0269  * DESCRIPTION: Execute a math AML opcode. The purpose of having all of the
0270  *              math functions here is to prevent a lot of pointer dereferencing
0271  *              to obtain the operands.
0272  *
0273  ******************************************************************************/
0274
0275 UINT64
0276 AcpiExDoMathOp (
0277     UINT16                  Opcode,
0278     UINT64                  Integer0,
0279     UINT64                  Integer1)
0280 {
0281
0282     ACPI_FUNCTION_ENTRY ();
0283
0284
0285     switch (Opcode)
0286     {
0287     case AML_ADD_OP:                /* Add (Integer0, Integer1, Result) */
0288
0289         return (Integer0 + Integer1);
0290
0291     case AML_BIT_AND_OP:            /* And (Integer0, Integer1, Result) */
0292
0293         return (Integer0 & Integer1);
0294
0295     case AML_BIT_NAND_OP:           /* NAnd (Integer0, Integer1, Result) */
0296
0297         return (~(Integer0 & Integer1));
0298
0299     case AML_BIT_OR_OP:             /* Or (Integer0, Integer1, Result) */
0300
0301         return (Integer0 | Integer1);
0302
0303     case AML_BIT_NOR_OP:            /* NOr (Integer0, Integer1, Result) */
0304
0305         return (~(Integer0 | Integer1));
0306
0307     case AML_BIT_XOR_OP:            /* XOr (Integer0, Integer1, Result) */
0308
0309         return (Integer0 ^ Integer1);
0310
0311     case AML_MULTIPLY_OP:           /* Multiply (Integer0, Integer1, Result) */
0312
0313         return (Integer0 * Integer1);
0314
0315     case AML_SHIFT_LEFT_OP:         /* ShiftLeft (Operand, ShiftCount, Result)*/
0316
0317         /*
0318          * We need to check if the shiftcount is larger than the integer bit
0319          * width since the behavior of this is not well-defined in the C language.
0320          */
0321         if (Integer1 >= AcpiGbl_IntegerBitWidth)
0322         {
0323             return (0);
0324         }
0325         return (Integer0 << Integer1);
0326
0327     case AML_SHIFT_RIGHT_OP:        /* ShiftRight (Operand, ShiftCount, Result) */
0328
0329         /*
0330          * We need to check if the shiftcount is larger than the integer bit
0331          * width since the behavior of this is not well-defined in the C language.
0332          */
0333         if (Integer1 >= AcpiGbl_IntegerBitWidth)
0334         {
0335             return (0);
0336         }
0337         return (Integer0 >> Integer1);
0338
0339     case AML_SUBTRACT_OP:           /* Subtract (Integer0, Integer1, Result) */
0340
0341         return (Integer0 - Integer1);
0342
0343     default:
0344
0345         return (0);
0346     }
0347 }
0348
0349
0350 /*******************************************************************************
0351  *
0352  * FUNCTION:    AcpiExDoLogicalNumericOp
0353  *
0354  * PARAMETERS:  Opcode              - AML opcode
0355  *              Integer0            - Integer operand #0
0356  *              Integer1            - Integer operand #1
0357  *              LogicalResult       - TRUE/FALSE result of the operation
0358  *
0359  * RETURN:      Status
0360  *
0361  * DESCRIPTION: Execute a logical "Numeric" AML opcode. For these Numeric
0362  *              operators (LAnd and LOr), both operands must be integers.
0363  *
0364  *              Note: cleanest machine code seems to be produced by the code
0365  *              below, rather than using statements of the form:
0366  *                  Result = (Integer0 && Integer1);
0367  *
0368  ******************************************************************************/
0369
0370 ACPI_STATUS
0371 AcpiExDoLogicalNumericOp (
0372     UINT16                  Opcode,
0373     UINT64                  Integer0,
0374     UINT64                  Integer1,
0375     BOOLEAN                 *LogicalResult)
0376 {
0377     ACPI_STATUS             Status = AE_OK;
0378     BOOLEAN                 LocalResult = FALSE;
0379
0380
0381     ACPI_FUNCTION_TRACE (ExDoLogicalNumericOp);
0382
0383
0384     switch (Opcode)
0385     {
0386     case AML_LOGICAL_AND_OP:        /* LAnd (Integer0, Integer1) */
0387
0388         if (Integer0 && Integer1)
0389         {
0390             LocalResult = TRUE;
0391         }
0392         break;
0393
0394     case AML_LOGICAL_OR_OP:         /* LOr (Integer0, Integer1) */
0395
0396         if (Integer0 || Integer1)
0397         {
0398             LocalResult = TRUE;
0399         }
0400         break;
0401
0402     default:
0403
0404         ACPI_ERROR ((AE_INFO,
0405             "Invalid numeric logical opcode: %X", Opcode));
0406         Status = AE_AML_INTERNAL;
0407         break;
0408     }
0409
0410     /* Return the logical result and status */
0411
0412     *LogicalResult = LocalResult;
0413     return_ACPI_STATUS (Status);
0414 }
0415
0416
0417 /*******************************************************************************
0418  *
0419  * FUNCTION:    AcpiExDoLogicalOp
0420  *
0421  * PARAMETERS:  Opcode              - AML opcode
0422  *              Operand0            - operand #0
0423  *              Operand1            - operand #1
0424  *              LogicalResult       - TRUE/FALSE result of the operation
0425  *
0426  * RETURN:      Status
0427  *
0428  * DESCRIPTION: Execute a logical AML opcode. The purpose of having all of the
0429  *              functions here is to prevent a lot of pointer dereferencing
0430  *              to obtain the operands and to simplify the generation of the
0431  *              logical value. For the Numeric operators (LAnd and LOr), both
0432  *              operands must be integers. For the other logical operators,
0433  *              operands can be any combination of Integer/String/Buffer. The
0434  *              first operand determines the type to which the second operand
0435  *              will be converted.
0436  *
0437  *              Note: cleanest machine code seems to be produced by the code
0438  *              below, rather than using statements of the form:
0439  *                  Result = (Operand0 == Operand1);
0440  *
0441  ******************************************************************************/
0442
0443 ACPI_STATUS
0444 AcpiExDoLogicalOp (
0445     UINT16                  Opcode,
0446     ACPI_OPERAND_OBJECT     *Operand0,
0447     ACPI_OPERAND_OBJECT     *Operand1,
0448     BOOLEAN                 *LogicalResult)
0449 {
0450     ACPI_OPERAND_OBJECT     *LocalOperand1 = Operand1;
0451     UINT64                  Integer0;
0452     UINT64                  Integer1;
0453     UINT32                  Length0;
0454     UINT32                  Length1;
0455     ACPI_STATUS             Status = AE_OK;
0456     BOOLEAN                 LocalResult = FALSE;
0457     int                     Compare;
0458
0459
0460     ACPI_FUNCTION_TRACE (ExDoLogicalOp);
0461
0462
0463     /*
0464      * Convert the second operand if necessary. The first operand
0465      * determines the type of the second operand, (See the Data Types
0466      * section of the ACPI 3.0+ specification.)  Both object types are
0467      * guaranteed to be either Integer/String/Buffer by the operand
0468      * resolution mechanism.
0469      */
0470     switch (Operand0->Common.Type)
0471     {
0472     case ACPI_TYPE_INTEGER:
0473
0474         Status = AcpiExConvertToInteger (Operand1, &LocalOperand1,
0475             ACPI_IMPLICIT_CONVERSION);
0476         break;
0477
0478     case ACPI_TYPE_STRING:
0479
0480         Status = AcpiExConvertToString (
0481             Operand1, &LocalOperand1, ACPI_IMPLICIT_CONVERT_HEX);
0482         break;
0483
0484     case ACPI_TYPE_BUFFER:
0485
0486         Status = AcpiExConvertToBuffer (Operand1, &LocalOperand1);
0487         break;
0488
0489     default:
0490
0491         ACPI_ERROR ((AE_INFO,
0492             "Invalid object type for logical operator: %X",
0493             Operand0->Common.Type));
0494         Status = AE_AML_INTERNAL;
0495         break;
0496     }
0497
0498     if (ACPI_FAILURE (Status))
0499     {
0500         goto Cleanup;
0501     }
0502
0503     /*
0504      * Two cases: 1) Both Integers, 2) Both Strings or Buffers
0505      */
0506     if (Operand0->Common.Type == ACPI_TYPE_INTEGER)
0507     {
0508         /*
0509          * 1) Both operands are of type integer
0510          *    Note: LocalOperand1 may have changed above
0511          */
0512         Integer0 = Operand0->Integer.Value;
0513         Integer1 = LocalOperand1->Integer.Value;
0514
0515         switch (Opcode)
0516         {
0517         case AML_LOGICAL_EQUAL_OP:          /* LEqual (Operand0, Operand1) */
0518
0519             if (Integer0 == Integer1)
0520             {
0521                 LocalResult = TRUE;
0522             }
0523             break;
0524
0525         case AML_LOGICAL_GREATER_OP:        /* LGreater (Operand0, Operand1) */
0526
0527             if (Integer0 > Integer1)
0528             {
0529                 LocalResult = TRUE;
0530             }
0531             break;
0532
0533         case AML_LOGICAL_LESS_OP:           /* LLess (Operand0, Operand1) */
0534
0535             if (Integer0 < Integer1)
0536             {
0537                 LocalResult = TRUE;
0538             }
0539             break;
0540
0541         default:
0542
0543             ACPI_ERROR ((AE_INFO,
0544                 "Invalid comparison opcode: %X", Opcode));
0545             Status = AE_AML_INTERNAL;
0546             break;
0547         }
0548     }
0549     else
0550     {
0551         /*
0552          * 2) Both operands are Strings or both are Buffers
0553          *    Note: Code below takes advantage of common Buffer/String
0554          *          object fields. LocalOperand1 may have changed above. Use
0555          *          memcmp to handle nulls in buffers.
0556          */
0557         Length0 = Operand0->Buffer.Length;
0558         Length1 = LocalOperand1->Buffer.Length;
0559
0560         /* Lexicographic compare: compare the data bytes */
0561
0562         Compare = memcmp (Operand0->Buffer.Pointer,
0563             LocalOperand1->Buffer.Pointer,
0564             (Length0 > Length1) ? Length1 : Length0);
0565
0566         switch (Opcode)
0567         {
0568         case AML_LOGICAL_EQUAL_OP:      /* LEqual (Operand0, Operand1) */
0569
0570             /* Length and all bytes must be equal */
0571
0572             if ((Length0 == Length1) &&
0573                 (Compare == 0))
0574             {
0575                 /* Length and all bytes match ==> TRUE */
0576
0577                 LocalResult = TRUE;
0578             }
0579             break;
0580
0581         case AML_LOGICAL_GREATER_OP:    /* LGreater (Operand0, Operand1) */
0582
0583             if (Compare > 0)
0584             {
0585                 LocalResult = TRUE;
0586                 goto Cleanup;   /* TRUE */
0587             }
0588             if (Compare < 0)
0589             {
0590                 goto Cleanup;   /* FALSE */
0591             }
0592
0593             /* Bytes match (to shortest length), compare lengths */
0594
0595             if (Length0 > Length1)
0596             {
0597                 LocalResult = TRUE;
0598             }
0599             break;
0600
0601         case AML_LOGICAL_LESS_OP:       /* LLess (Operand0, Operand1) */
0602
0603             if (Compare > 0)
0604             {
0605                 goto Cleanup;   /* FALSE */
0606             }
0607             if (Compare < 0)
0608             {
0609                 LocalResult = TRUE;
0610                 goto Cleanup;   /* TRUE */
0611             }
0612
0613             /* Bytes match (to shortest length), compare lengths */
0614
0615             if (Length0 < Length1)
0616             {
0617                 LocalResult = TRUE;
0618             }
0619             break;
0620
0621         default:
0622
0623             ACPI_ERROR ((AE_INFO,
0624                 "Invalid comparison opcode: %X", Opcode));
0625             Status = AE_AML_INTERNAL;
0626             break;
0627         }
0628     }
0629
0630 Cleanup:
0631
0632     /* New object was created if implicit conversion performed - delete */
0633
0634     if (LocalOperand1 != Operand1)
0635     {
0636         AcpiUtRemoveReference (LocalOperand1);
0637     }
0638
0639     /* Return the logical result and status */
0640
0641     *LogicalResult = LocalResult;
0642     return_ACPI_STATUS (Status);
0643 }