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Diffstat (limited to 'sys/contrib/dev/acpica/exmisc.c')
| -rw-r--r-- | sys/contrib/dev/acpica/exmisc.c | 873 |
1 files changed, 0 insertions, 873 deletions
diff --git a/sys/contrib/dev/acpica/exmisc.c b/sys/contrib/dev/acpica/exmisc.c deleted file mode 100644 index 11dd35a..0000000 --- a/sys/contrib/dev/acpica/exmisc.c +++ /dev/null @@ -1,873 +0,0 @@ - -/****************************************************************************** - * - * Module Name: exmisc - ACPI AML (p-code) execution - specific opcodes - * $Revision: 1.144 $ - * - *****************************************************************************/ - -/****************************************************************************** - * - * 1. Copyright Notice - * - * Some or all of this work - Copyright (c) 1999 - 2007, Intel Corp. - * All rights reserved. - * - * 2. License - * - * 2.1. This is your license from Intel Corp. under its intellectual property - * rights. You may have additional license terms from the party that provided - * you this software, covering your right to use that party's intellectual - * property rights. - * - * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a - * copy of the source code appearing in this file ("Covered Code") an - * irrevocable, perpetual, worldwide license under Intel's copyrights in the - * base code distributed originally by Intel ("Original Intel Code") to copy, - * make derivatives, distribute, use and display any portion of the Covered - * Code in any form, with the right to sublicense such rights; and - * - * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent - * license (with the right to sublicense), under only those claims of Intel - * patents that are infringed by the Original Intel Code, to make, use, sell, - * offer to sell, and import the Covered Code and derivative works thereof - * solely to the minimum extent necessary to exercise the above copyright - * license, and in no event shall the patent license extend to any additions - * to or modifications of the Original Intel Code. No other license or right - * is granted directly or by implication, estoppel or otherwise; - * - * The above copyright and patent license is granted only if the following - * conditions are met: - * - * 3. Conditions - * - * 3.1. Redistribution of Source with Rights to Further Distribute Source. - * Redistribution of source code of any substantial portion of the Covered - * Code or modification with rights to further distribute source must include - * the above Copyright Notice, the above License, this list of Conditions, - * and the following Disclaimer and Export Compliance provision. In addition, - * Licensee must cause all Covered Code to which Licensee contributes to - * contain a file documenting the changes Licensee made to create that Covered - * Code and the date of any change. Licensee must include in that file the - * documentation of any changes made by any predecessor Licensee. Licensee - * must include a prominent statement that the modification is derived, - * directly or indirectly, from Original Intel Code. - * - * 3.2. Redistribution of Source with no Rights to Further Distribute Source. - * Redistribution of source code of any substantial portion of the Covered - * Code or modification without rights to further distribute source must - * include the following Disclaimer and Export Compliance provision in the - * documentation and/or other materials provided with distribution. In - * addition, Licensee may not authorize further sublicense of source of any - * portion of the Covered Code, and must include terms to the effect that the - * license from Licensee to its licensee is limited to the intellectual - * property embodied in the software Licensee provides to its licensee, and - * not to intellectual property embodied in modifications its licensee may - * make. - * - * 3.3. Redistribution of Executable. Redistribution in executable form of any - * substantial portion of the Covered Code or modification must reproduce the - * above Copyright Notice, and the following Disclaimer and Export Compliance - * provision in the documentation and/or other materials provided with the - * distribution. - * - * 3.4. Intel retains all right, title, and interest in and to the Original - * Intel Code. - * - * 3.5. Neither the name Intel nor any other trademark owned or controlled by - * Intel shall be used in advertising or otherwise to promote the sale, use or - * other dealings in products derived from or relating to the Covered Code - * without prior written authorization from Intel. - * - * 4. Disclaimer and Export Compliance - * - * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED - * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE - * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, - * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY - - * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY - * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A - * PARTICULAR PURPOSE. - * - * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES - * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR - * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, - * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY - * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL - * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS - * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY - * LIMITED REMEDY. - * - * 4.3. Licensee shall not export, either directly or indirectly, any of this - * software or system incorporating such software without first obtaining any - * required license or other approval from the U. S. Department of Commerce or - * any other agency or department of the United States Government. In the - * event Licensee exports any such software from the United States or - * re-exports any such software from a foreign destination, Licensee shall - * ensure that the distribution and export/re-export of the software is in - * compliance with all laws, regulations, orders, or other restrictions of the - * U.S. Export Administration Regulations. Licensee agrees that neither it nor - * any of its subsidiaries will export/re-export any technical data, process, - * software, or service, directly or indirectly, to any country for which the - * United States government or any agency thereof requires an export license, - * other governmental approval, or letter of assurance, without first obtaining - * such license, approval or letter. - * - *****************************************************************************/ - -#define __EXMISC_C__ - -#include <contrib/dev/acpica/acpi.h> -#include <contrib/dev/acpica/acinterp.h> -#include <contrib/dev/acpica/amlcode.h> -#include <contrib/dev/acpica/amlresrc.h> - - -#define _COMPONENT ACPI_EXECUTER - ACPI_MODULE_NAME ("exmisc") - - -/******************************************************************************* - * - * FUNCTION: AcpiExGetObjectReference - * - * PARAMETERS: ObjDesc - Create a reference to this object - * ReturnDesc - Where to store the reference - * WalkState - Current state - * - * RETURN: Status - * - * DESCRIPTION: Obtain and return a "reference" to the target object - * Common code for the RefOfOp and the CondRefOfOp. - * - ******************************************************************************/ - -ACPI_STATUS -AcpiExGetObjectReference ( - ACPI_OPERAND_OBJECT *ObjDesc, - ACPI_OPERAND_OBJECT **ReturnDesc, - ACPI_WALK_STATE *WalkState) -{ - ACPI_OPERAND_OBJECT *ReferenceObj; - ACPI_OPERAND_OBJECT *ReferencedObj; - - - ACPI_FUNCTION_TRACE_PTR (ExGetObjectReference, ObjDesc); - - - *ReturnDesc = NULL; - - switch (ACPI_GET_DESCRIPTOR_TYPE (ObjDesc)) - { - case ACPI_DESC_TYPE_OPERAND: - - if (ACPI_GET_OBJECT_TYPE (ObjDesc) != ACPI_TYPE_LOCAL_REFERENCE) - { - return_ACPI_STATUS (AE_AML_OPERAND_TYPE); - } - - /* - * Must be a reference to a Local or Arg - */ - switch (ObjDesc->Reference.Opcode) - { - case AML_LOCAL_OP: - case AML_ARG_OP: - case AML_DEBUG_OP: - - /* The referenced object is the pseudo-node for the local/arg */ - - ReferencedObj = ObjDesc->Reference.Object; - break; - - default: - - ACPI_ERROR ((AE_INFO, "Unknown Reference opcode %X", - ObjDesc->Reference.Opcode)); - return_ACPI_STATUS (AE_AML_INTERNAL); - } - break; - - - case ACPI_DESC_TYPE_NAMED: - - /* - * A named reference that has already been resolved to a Node - */ - ReferencedObj = ObjDesc; - break; - - - default: - - ACPI_ERROR ((AE_INFO, "Invalid descriptor type %X", - ACPI_GET_DESCRIPTOR_TYPE (ObjDesc))); - return_ACPI_STATUS (AE_TYPE); - } - - - /* Create a new reference object */ - - ReferenceObj = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_REFERENCE); - if (!ReferenceObj) - { - return_ACPI_STATUS (AE_NO_MEMORY); - } - - ReferenceObj->Reference.Opcode = AML_REF_OF_OP; - ReferenceObj->Reference.Object = ReferencedObj; - *ReturnDesc = ReferenceObj; - - ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, - "Object %p Type [%s], returning Reference %p\n", - ObjDesc, AcpiUtGetObjectTypeName (ObjDesc), *ReturnDesc)); - - return_ACPI_STATUS (AE_OK); -} - - -/******************************************************************************* - * - * FUNCTION: AcpiExConcatTemplate - * - * PARAMETERS: Operand0 - First source object - * Operand1 - Second source object - * ActualReturnDesc - Where to place the return object - * WalkState - Current walk state - * - * RETURN: Status - * - * DESCRIPTION: Concatenate two resource templates - * - ******************************************************************************/ - -ACPI_STATUS -AcpiExConcatTemplate ( - ACPI_OPERAND_OBJECT *Operand0, - ACPI_OPERAND_OBJECT *Operand1, - ACPI_OPERAND_OBJECT **ActualReturnDesc, - ACPI_WALK_STATE *WalkState) -{ - ACPI_STATUS Status; - ACPI_OPERAND_OBJECT *ReturnDesc; - UINT8 *NewBuf; - UINT8 *EndTag; - ACPI_SIZE Length0; - ACPI_SIZE Length1; - ACPI_SIZE NewLength; - - - ACPI_FUNCTION_TRACE (ExConcatTemplate); - - - /* - * Find the EndTag descriptor in each resource template. - * Note1: returned pointers point TO the EndTag, not past it. - * Note2: zero-length buffers are allowed; treated like one EndTag - */ - - /* Get the length of the first resource template */ - - Status = AcpiUtGetResourceEndTag (Operand0, &EndTag); - if (ACPI_FAILURE (Status)) - { - return_ACPI_STATUS (Status); - } - - Length0 = ACPI_PTR_DIFF (EndTag, Operand0->Buffer.Pointer); - - /* Get the length of the second resource template */ - - Status = AcpiUtGetResourceEndTag (Operand1, &EndTag); - if (ACPI_FAILURE (Status)) - { - return_ACPI_STATUS (Status); - } - - Length1 = ACPI_PTR_DIFF (EndTag, Operand1->Buffer.Pointer); - - /* Combine both lengths, minimum size will be 2 for EndTag */ - - NewLength = Length0 + Length1 + sizeof (AML_RESOURCE_END_TAG); - - /* Create a new buffer object for the result (with one EndTag) */ - - ReturnDesc = AcpiUtCreateBufferObject (NewLength); - if (!ReturnDesc) - { - return_ACPI_STATUS (AE_NO_MEMORY); - } - - /* - * Copy the templates to the new buffer, 0 first, then 1 follows. One - * EndTag descriptor is copied from Operand1. - */ - NewBuf = ReturnDesc->Buffer.Pointer; - ACPI_MEMCPY (NewBuf, Operand0->Buffer.Pointer, Length0); - ACPI_MEMCPY (NewBuf + Length0, Operand1->Buffer.Pointer, Length1); - - /* Insert EndTag and set the checksum to zero, means "ignore checksum" */ - - NewBuf[NewLength - 1] = 0; - NewBuf[NewLength - 2] = ACPI_RESOURCE_NAME_END_TAG | 1; - - /* Return the completed resource template */ - - *ActualReturnDesc = ReturnDesc; - return_ACPI_STATUS (AE_OK); -} - - -/******************************************************************************* - * - * FUNCTION: AcpiExDoConcatenate - * - * PARAMETERS: Operand0 - First source object - * Operand1 - Second source object - * ActualReturnDesc - Where to place the return object - * WalkState - Current walk state - * - * RETURN: Status - * - * DESCRIPTION: Concatenate two objects OF THE SAME TYPE. - * - ******************************************************************************/ - -ACPI_STATUS -AcpiExDoConcatenate ( - ACPI_OPERAND_OBJECT *Operand0, - ACPI_OPERAND_OBJECT *Operand1, - ACPI_OPERAND_OBJECT **ActualReturnDesc, - ACPI_WALK_STATE *WalkState) -{ - ACPI_OPERAND_OBJECT *LocalOperand1 = Operand1; - ACPI_OPERAND_OBJECT *ReturnDesc; - char *NewBuf; - ACPI_STATUS Status; - - - ACPI_FUNCTION_TRACE (ExDoConcatenate); - - - /* - * Convert the second operand if necessary. The first operand - * determines the type of the second operand, (See the Data Types - * section of the ACPI specification.) Both object types are - * guaranteed to be either Integer/String/Buffer by the operand - * resolution mechanism. - */ - switch (ACPI_GET_OBJECT_TYPE (Operand0)) - { - case ACPI_TYPE_INTEGER: - Status = AcpiExConvertToInteger (Operand1, &LocalOperand1, 16); - break; - - case ACPI_TYPE_STRING: - Status = AcpiExConvertToString (Operand1, &LocalOperand1, - ACPI_IMPLICIT_CONVERT_HEX); - break; - - case ACPI_TYPE_BUFFER: - Status = AcpiExConvertToBuffer (Operand1, &LocalOperand1); - break; - - default: - ACPI_ERROR ((AE_INFO, "Invalid object type: %X", - ACPI_GET_OBJECT_TYPE (Operand0))); - Status = AE_AML_INTERNAL; - } - - if (ACPI_FAILURE (Status)) - { - goto Cleanup; - } - - /* - * Both operands are now known to be the same object type - * (Both are Integer, String, or Buffer), and we can now perform the - * concatenation. - */ - - /* - * There are three cases to handle: - * - * 1) Two Integers concatenated to produce a new Buffer - * 2) Two Strings concatenated to produce a new String - * 3) Two Buffers concatenated to produce a new Buffer - */ - switch (ACPI_GET_OBJECT_TYPE (Operand0)) - { - case ACPI_TYPE_INTEGER: - - /* Result of two Integers is a Buffer */ - /* Need enough buffer space for two integers */ - - ReturnDesc = AcpiUtCreateBufferObject ((ACPI_SIZE) - ACPI_MUL_2 (AcpiGbl_IntegerByteWidth)); - if (!ReturnDesc) - { - Status = AE_NO_MEMORY; - goto Cleanup; - } - - NewBuf = (char *) ReturnDesc->Buffer.Pointer; - - /* Copy the first integer, LSB first */ - - ACPI_MEMCPY (NewBuf, &Operand0->Integer.Value, - AcpiGbl_IntegerByteWidth); - - /* Copy the second integer (LSB first) after the first */ - - ACPI_MEMCPY (NewBuf + AcpiGbl_IntegerByteWidth, - &LocalOperand1->Integer.Value, - AcpiGbl_IntegerByteWidth); - break; - - case ACPI_TYPE_STRING: - - /* Result of two Strings is a String */ - - ReturnDesc = AcpiUtCreateStringObject ((ACPI_SIZE) - (Operand0->String.Length + - LocalOperand1->String.Length)); - if (!ReturnDesc) - { - Status = AE_NO_MEMORY; - goto Cleanup; - } - - NewBuf = ReturnDesc->String.Pointer; - - /* Concatenate the strings */ - - ACPI_STRCPY (NewBuf, Operand0->String.Pointer); - ACPI_STRCPY (NewBuf + Operand0->String.Length, - LocalOperand1->String.Pointer); - break; - - case ACPI_TYPE_BUFFER: - - /* Result of two Buffers is a Buffer */ - - ReturnDesc = AcpiUtCreateBufferObject ((ACPI_SIZE) - (Operand0->Buffer.Length + - LocalOperand1->Buffer.Length)); - if (!ReturnDesc) - { - Status = AE_NO_MEMORY; - goto Cleanup; - } - - NewBuf = (char *) ReturnDesc->Buffer.Pointer; - - /* Concatenate the buffers */ - - ACPI_MEMCPY (NewBuf, Operand0->Buffer.Pointer, - Operand0->Buffer.Length); - ACPI_MEMCPY (NewBuf + Operand0->Buffer.Length, - LocalOperand1->Buffer.Pointer, - LocalOperand1->Buffer.Length); - break; - - default: - - /* Invalid object type, should not happen here */ - - ACPI_ERROR ((AE_INFO, "Invalid object type: %X", - ACPI_GET_OBJECT_TYPE (Operand0))); - Status =AE_AML_INTERNAL; - goto Cleanup; - } - - *ActualReturnDesc = ReturnDesc; - -Cleanup: - if (LocalOperand1 != Operand1) - { - AcpiUtRemoveReference (LocalOperand1); - } - return_ACPI_STATUS (Status); -} - - -/******************************************************************************* - * - * FUNCTION: AcpiExDoMathOp - * - * PARAMETERS: Opcode - AML opcode - * Integer0 - Integer operand #0 - * Integer1 - Integer operand #1 - * - * RETURN: Integer result of the operation - * - * DESCRIPTION: Execute a math AML opcode. The purpose of having all of the - * math functions here is to prevent a lot of pointer dereferencing - * to obtain the operands. - * - ******************************************************************************/ - -ACPI_INTEGER -AcpiExDoMathOp ( - UINT16 Opcode, - ACPI_INTEGER Integer0, - ACPI_INTEGER Integer1) -{ - - ACPI_FUNCTION_ENTRY (); - - - switch (Opcode) - { - case AML_ADD_OP: /* Add (Integer0, Integer1, Result) */ - - return (Integer0 + Integer1); - - - case AML_BIT_AND_OP: /* And (Integer0, Integer1, Result) */ - - return (Integer0 & Integer1); - - - case AML_BIT_NAND_OP: /* NAnd (Integer0, Integer1, Result) */ - - return (~(Integer0 & Integer1)); - - - case AML_BIT_OR_OP: /* Or (Integer0, Integer1, Result) */ - - return (Integer0 | Integer1); - - - case AML_BIT_NOR_OP: /* NOr (Integer0, Integer1, Result) */ - - return (~(Integer0 | Integer1)); - - - case AML_BIT_XOR_OP: /* XOr (Integer0, Integer1, Result) */ - - return (Integer0 ^ Integer1); - - - case AML_MULTIPLY_OP: /* Multiply (Integer0, Integer1, Result) */ - - return (Integer0 * Integer1); - - - case AML_SHIFT_LEFT_OP: /* ShiftLeft (Operand, ShiftCount, Result)*/ - - /* - * We need to check if the shiftcount is larger than the integer bit - * width since the behavior of this is not well-defined in the C language. - */ - if (Integer1 >= AcpiGbl_IntegerBitWidth) - { - return (0); - } - return (Integer0 << Integer1); - - - case AML_SHIFT_RIGHT_OP: /* ShiftRight (Operand, ShiftCount, Result) */ - - /* - * We need to check if the shiftcount is larger than the integer bit - * width since the behavior of this is not well-defined in the C language. - */ - if (Integer1 >= AcpiGbl_IntegerBitWidth) - { - return (0); - } - return (Integer0 >> Integer1); - - - case AML_SUBTRACT_OP: /* Subtract (Integer0, Integer1, Result) */ - - return (Integer0 - Integer1); - - default: - - return (0); - } -} - - -/******************************************************************************* - * - * FUNCTION: AcpiExDoLogicalNumericOp - * - * PARAMETERS: Opcode - AML opcode - * Integer0 - Integer operand #0 - * Integer1 - Integer operand #1 - * LogicalResult - TRUE/FALSE result of the operation - * - * RETURN: Status - * - * DESCRIPTION: Execute a logical "Numeric" AML opcode. For these Numeric - * operators (LAnd and LOr), both operands must be integers. - * - * Note: cleanest machine code seems to be produced by the code - * below, rather than using statements of the form: - * Result = (Integer0 && Integer1); - * - ******************************************************************************/ - -ACPI_STATUS -AcpiExDoLogicalNumericOp ( - UINT16 Opcode, - ACPI_INTEGER Integer0, - ACPI_INTEGER Integer1, - BOOLEAN *LogicalResult) -{ - ACPI_STATUS Status = AE_OK; - BOOLEAN LocalResult = FALSE; - - - ACPI_FUNCTION_TRACE (ExDoLogicalNumericOp); - - - switch (Opcode) - { - case AML_LAND_OP: /* LAnd (Integer0, Integer1) */ - - if (Integer0 && Integer1) - { - LocalResult = TRUE; - } - break; - - case AML_LOR_OP: /* LOr (Integer0, Integer1) */ - - if (Integer0 || Integer1) - { - LocalResult = TRUE; - } - break; - - default: - Status = AE_AML_INTERNAL; - break; - } - - /* Return the logical result and status */ - - *LogicalResult = LocalResult; - return_ACPI_STATUS (Status); -} - - -/******************************************************************************* - * - * FUNCTION: AcpiExDoLogicalOp - * - * PARAMETERS: Opcode - AML opcode - * Operand0 - operand #0 - * Operand1 - operand #1 - * LogicalResult - TRUE/FALSE result of the operation - * - * RETURN: Status - * - * DESCRIPTION: Execute a logical AML opcode. The purpose of having all of the - * functions here is to prevent a lot of pointer dereferencing - * to obtain the operands and to simplify the generation of the - * logical value. For the Numeric operators (LAnd and LOr), both - * operands must be integers. For the other logical operators, - * operands can be any combination of Integer/String/Buffer. The - * first operand determines the type to which the second operand - * will be converted. - * - * Note: cleanest machine code seems to be produced by the code - * below, rather than using statements of the form: - * Result = (Operand0 == Operand1); - * - ******************************************************************************/ - -ACPI_STATUS -AcpiExDoLogicalOp ( - UINT16 Opcode, - ACPI_OPERAND_OBJECT *Operand0, - ACPI_OPERAND_OBJECT *Operand1, - BOOLEAN *LogicalResult) -{ - ACPI_OPERAND_OBJECT *LocalOperand1 = Operand1; - ACPI_INTEGER Integer0; - ACPI_INTEGER Integer1; - UINT32 Length0; - UINT32 Length1; - ACPI_STATUS Status = AE_OK; - BOOLEAN LocalResult = FALSE; - int Compare; - - - ACPI_FUNCTION_TRACE (ExDoLogicalOp); - - - /* - * Convert the second operand if necessary. The first operand - * determines the type of the second operand, (See the Data Types - * section of the ACPI 3.0+ specification.) Both object types are - * guaranteed to be either Integer/String/Buffer by the operand - * resolution mechanism. - */ - switch (ACPI_GET_OBJECT_TYPE (Operand0)) - { - case ACPI_TYPE_INTEGER: - Status = AcpiExConvertToInteger (Operand1, &LocalOperand1, 16); - break; - - case ACPI_TYPE_STRING: - Status = AcpiExConvertToString (Operand1, &LocalOperand1, - ACPI_IMPLICIT_CONVERT_HEX); - break; - - case ACPI_TYPE_BUFFER: - Status = AcpiExConvertToBuffer (Operand1, &LocalOperand1); - break; - - default: - Status = AE_AML_INTERNAL; - break; - } - - if (ACPI_FAILURE (Status)) - { - goto Cleanup; - } - - /* - * Two cases: 1) Both Integers, 2) Both Strings or Buffers - */ - if (ACPI_GET_OBJECT_TYPE (Operand0) == ACPI_TYPE_INTEGER) - { - /* - * 1) Both operands are of type integer - * Note: LocalOperand1 may have changed above - */ - Integer0 = Operand0->Integer.Value; - Integer1 = LocalOperand1->Integer.Value; - - switch (Opcode) - { - case AML_LEQUAL_OP: /* LEqual (Operand0, Operand1) */ - - if (Integer0 == Integer1) - { - LocalResult = TRUE; - } - break; - - case AML_LGREATER_OP: /* LGreater (Operand0, Operand1) */ - - if (Integer0 > Integer1) - { - LocalResult = TRUE; - } - break; - - case AML_LLESS_OP: /* LLess (Operand0, Operand1) */ - - if (Integer0 < Integer1) - { - LocalResult = TRUE; - } - break; - - default: - Status = AE_AML_INTERNAL; - break; - } - } - else - { - /* - * 2) Both operands are Strings or both are Buffers - * Note: Code below takes advantage of common Buffer/String - * object fields. LocalOperand1 may have changed above. Use - * memcmp to handle nulls in buffers. - */ - Length0 = Operand0->Buffer.Length; - Length1 = LocalOperand1->Buffer.Length; - - /* Lexicographic compare: compare the data bytes */ - - Compare = ACPI_MEMCMP (Operand0->Buffer.Pointer, - LocalOperand1->Buffer.Pointer, - (Length0 > Length1) ? Length1 : Length0); - - switch (Opcode) - { - case AML_LEQUAL_OP: /* LEqual (Operand0, Operand1) */ - - /* Length and all bytes must be equal */ - - if ((Length0 == Length1) && - (Compare == 0)) - { - /* Length and all bytes match ==> TRUE */ - - LocalResult = TRUE; - } - break; - - case AML_LGREATER_OP: /* LGreater (Operand0, Operand1) */ - - if (Compare > 0) - { - LocalResult = TRUE; - goto Cleanup; /* TRUE */ - } - if (Compare < 0) - { - goto Cleanup; /* FALSE */ - } - - /* Bytes match (to shortest length), compare lengths */ - - if (Length0 > Length1) - { - LocalResult = TRUE; - } - break; - - case AML_LLESS_OP: /* LLess (Operand0, Operand1) */ - - if (Compare > 0) - { - goto Cleanup; /* FALSE */ - } - if (Compare < 0) - { - LocalResult = TRUE; - goto Cleanup; /* TRUE */ - } - - /* Bytes match (to shortest length), compare lengths */ - - if (Length0 < Length1) - { - LocalResult = TRUE; - } - break; - - default: - Status = AE_AML_INTERNAL; - break; - } - } - -Cleanup: - - /* New object was created if implicit conversion performed - delete */ - - if (LocalOperand1 != Operand1) - { - AcpiUtRemoveReference (LocalOperand1); - } - - /* Return the logical result and status */ - - *LogicalResult = LocalResult; - return_ACPI_STATUS (Status); -} - - |
