exmisc.c File Reference

#include "acpi.h"
#include "accommon.h"
#include "acinterp.h"
#include "amlcode.h"

Include dependency graph for exmisc.c:

Go to the source code of this file.

Macros
#define	_COMPONENT   ACPI_EXECUTER

Functions
ACPI_STATUS	AcpiExGetObjectReference (ACPI_OPERAND_OBJECT *ObjDesc, ACPI_OPERAND_OBJECT **ReturnDesc, ACPI_WALK_STATE *WalkState)
UINT64	AcpiExDoMathOp (UINT16 Opcode, UINT64 Integer0, UINT64 Integer1)
ACPI_STATUS	AcpiExDoLogicalNumericOp (UINT16 Opcode, UINT64 Integer0, UINT64 Integer1, BOOLEAN *LogicalResult)
ACPI_STATUS	AcpiExDoLogicalOp (UINT16 Opcode, ACPI_OPERAND_OBJECT *Operand0, ACPI_OPERAND_OBJECT *Operand1, BOOLEAN *LogicalResult)

Macro Definition Documentation

_COMPONENT

#define _COMPONENT   ACPI_EXECUTER

Definition at line 50 of file exmisc.c.

Function Documentation

AcpiExDoLogicalNumericOp()

ACPI_STATUS AcpiExDoLogicalNumericOp	(	UINT16	Opcode,
		UINT64	Integer0,
		UINT64	Integer1,
		BOOLEAN *	LogicalResult
	)

Definition at line 262 of file exmisc.c.

{
    ACPI_STATUS             Status = AE_OK;
    BOOLEAN                 LocalResult = FALSE;
 
 
    ACPI_FUNCTION_TRACE (ExDoLogicalNumericOp);
 
 
    switch (Opcode)
    {
    case AML_LOGICAL_AND_OP:        /* LAnd (Integer0, Integer1) */
 
        if (Integer0 && Integer1)
        {
            LocalResult = TRUE;
        }
        break;
 
    case AML_LOGICAL_OR_OP:         /* LOr (Integer0, Integer1) */
 
        if (Integer0 || Integer1)
        {
            LocalResult = TRUE;
        }
        break;
 
    default:
 
        ACPI_ERROR ((AE_INFO,
            "Invalid numeric logical opcode: %X", Opcode));
        Status = AE_AML_INTERNAL;
        break;
    }
 
    /* Return the logical result and status */
 
    *LogicalResult = LocalResult;
    return_ACPI_STATUS (Status);
}

Referenced by AcpiExOpcode_2A_0T_1R().

AcpiExDoLogicalOp()

ACPI_STATUS AcpiExDoLogicalOp	(	UINT16	Opcode,
		ACPI_OPERAND_OBJECT *	Operand0,
		ACPI_OPERAND_OBJECT *	Operand1,
		BOOLEAN *	LogicalResult
	)

Definition at line 335 of file exmisc.c.

{
    ACPI_OPERAND_OBJECT     *LocalOperand1 = Operand1;
    UINT64                  Integer0;
    UINT64                  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 (Operand0->Common.Type)
    {
    case ACPI_TYPE_INTEGER:
 
        Status = AcpiExConvertToInteger (Operand1, &LocalOperand1,
            ACPI_IMPLICIT_CONVERSION);
        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 for logical operator: %X",
            Operand0->Common.Type));
        Status = AE_AML_INTERNAL;
        break;
    }
 
    if (ACPI_FAILURE (Status))
    {
        goto Cleanup;
    }
 
    /*
     * Two cases: 1) Both Integers, 2) Both Strings or Buffers
     */
    if (Operand0->Common.Type == 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_LOGICAL_EQUAL_OP:          /* LEqual (Operand0, Operand1) */
 
            if (Integer0 == Integer1)
            {
                LocalResult = TRUE;
            }
            break;
 
        case AML_LOGICAL_GREATER_OP:        /* LGreater (Operand0, Operand1) */
 
            if (Integer0 > Integer1)
            {
                LocalResult = TRUE;
            }
            break;
 
        case AML_LOGICAL_LESS_OP:           /* LLess (Operand0, Operand1) */
 
            if (Integer0 < Integer1)
            {
                LocalResult = TRUE;
            }
            break;
 
        default:
 
            ACPI_ERROR ((AE_INFO,
                "Invalid comparison opcode: %X", Opcode));
            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 = memcmp (Operand0->Buffer.Pointer,
            LocalOperand1->Buffer.Pointer,
            (Length0 > Length1) ? Length1 : Length0);
 
        switch (Opcode)
        {
        case AML_LOGICAL_EQUAL_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_LOGICAL_GREATER_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_LOGICAL_LESS_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:
 
            ACPI_ERROR ((AE_INFO,
                "Invalid comparison opcode: %X", Opcode));
            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);
}

Referenced by AcpiExDoMatch(), and AcpiExOpcode_2A_0T_1R().

AcpiExDoMathOp()

UINT64 AcpiExDoMathOp	(	UINT16	Opcode,
		UINT64	Integer0,
		UINT64	Integer1
	)

Definition at line 167 of file exmisc.c.

{
 
    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);
    }
}

Referenced by AcpiExOpcode_2A_1T_1R().

AcpiExGetObjectReference()

ACPI_STATUS AcpiExGetObjectReference	(	ACPI_OPERAND_OBJECT *	ObjDesc,
		ACPI_OPERAND_OBJECT **	ReturnDesc,
		ACPI_WALK_STATE *	WalkState
	)

Definition at line 70 of file exmisc.c.

{
    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 (ObjDesc->Common.Type != ACPI_TYPE_LOCAL_REFERENCE)
        {
            return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
        }
 
        /*
         * Must be a reference to a Local or Arg
         */
        switch (ObjDesc->Reference.Class)
        {
        case ACPI_REFCLASS_LOCAL:
        case ACPI_REFCLASS_ARG:
        case ACPI_REFCLASS_DEBUG:
 
            /* The referenced object is the pseudo-node for the local/arg */
 
            ReferencedObj = ObjDesc->Reference.Object;
            break;
 
        default:
 
            ACPI_ERROR ((AE_INFO, "Invalid Reference Class 0x%2.2X",
                ObjDesc->Reference.Class));
            return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
        }
        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 0x%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.Class = ACPI_REFCLASS_REFOF;
    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);
}

Referenced by AcpiExOpcode_1A_0T_1R(), and AcpiExOpcode_1A_1T_1R().