Import ACPICA 20170629.vendor/acpica/20170629

1 files changed, 945 insertions, 0 deletions

diff --git a/source/compiler/aslparseop.c b/source/compiler/aslparseop.c
new file mode 100644
index 000000000000..4e6e5a16276c
--- /dev/null
+++ b/source/compiler/aslparseop.c
@@ -0,0 +1,945 @@
+/******************************************************************************
+ *
+ * Module Name: aslparseop - Parse op create/allocate/cache interfaces
+ *
+ *****************************************************************************/
+
+/******************************************************************************
+ *
+ * 1. Copyright Notice
+ *
+ * Some or all of this work - Copyright (c) 1999 - 2017, 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.
+ *
+ *****************************************************************************
+ *
+ * Alternatively, you may choose to be licensed under the terms of the
+ * following license:
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Alternatively, you may choose to be licensed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ *****************************************************************************/
+
+#include "aslcompiler.h"
+#include "aslcompiler.y.h"
+#include "acapps.h"
+#include "acconvert.h"
+
+#define _COMPONENT          ACPI_COMPILER
+        ACPI_MODULE_NAME    ("aslparseop")
+
+
+/* Local prototypes */
+
+static ACPI_PARSE_OBJECT *
+TrGetOpFromCache (
+    void);
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    TrCreateOp
+ *
+ * PARAMETERS:  ParseOpcode         - Opcode to be assigned to the op
+ *              NumChildren         - Number of children to follow
+ *              ...                 - A list of child ops to link to the new
+ *                                    op. NumChildren long.
+ *
+ * RETURN:      Pointer to the new op. Aborts on allocation failure
+ *
+ * DESCRIPTION: Create a new parse op and link together a list of child
+ *              ops underneath the new op.
+ *
+ ******************************************************************************/
+
+ACPI_PARSE_OBJECT *
+TrCreateOp (
+    UINT32                  ParseOpcode,
+    UINT32                  NumChildren,
+    ...)
+{
+    ACPI_PARSE_OBJECT       *Op;
+    ACPI_PARSE_OBJECT       *Child;
+    ACPI_PARSE_OBJECT       *PrevChild;
+    va_list                 ap;
+    UINT32                  i;
+    BOOLEAN                 FirstChild;
+
+
+    va_start (ap, NumChildren);
+
+    /* Allocate one new op */
+
+    Op = TrAllocateOp (ParseOpcode);
+
+    DbgPrint (ASL_PARSE_OUTPUT,
+        "\nCreateOp  Ln/Col %u/%u NewParent %p Child %u Op %s  ",
+        Op->Asl.LineNumber, Op->Asl.Column, Op,
+        NumChildren, UtGetOpName(ParseOpcode));
+
+    /* Some extra debug output based on the parse opcode */
+
+    switch (ParseOpcode)
+    {
+    case PARSEOP_ASL_CODE:
+
+        Gbl_ParseTreeRoot = Op;
+        Op->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG;
+        DbgPrint (ASL_PARSE_OUTPUT, "ASLCODE (Tree Completed)->");
+        break;
+
+    case PARSEOP_DEFINITION_BLOCK:
+
+        DbgPrint (ASL_PARSE_OUTPUT, "DEFINITION_BLOCK (Tree Completed)->");
+        break;
+
+    case PARSEOP_OPERATIONREGION:
+
+        DbgPrint (ASL_PARSE_OUTPUT, "OPREGION->");
+        break;
+
+    case PARSEOP_OR:
+
+        DbgPrint (ASL_PARSE_OUTPUT, "OR->");
+        break;
+
+    default:
+
+        /* Nothing to do for other opcodes */
+
+        break;
+    }
+
+    /* Link the new op to its children */
+
+    PrevChild = NULL;
+    FirstChild = TRUE;
+    for (i = 0; i < NumChildren; i++)
+    {
+        /* Get the next child */
+
+        Child = va_arg (ap, ACPI_PARSE_OBJECT *);
+        DbgPrint (ASL_PARSE_OUTPUT, "%p, ", Child);
+
+        /*
+         * If child is NULL, this means that an optional argument
+         * was omitted. We must create a placeholder with a special
+         * opcode (DEFAULT_ARG) so that the code generator will know
+         * that it must emit the correct default for this argument
+         */
+        if (!Child)
+        {
+            Child = TrAllocateOp (PARSEOP_DEFAULT_ARG);
+        }
+
+        /* Link first child to parent */
+
+        if (FirstChild)
+        {
+            FirstChild = FALSE;
+            Op->Asl.Child = Child;
+
+            /*
+             * For the ASL-/ASL+ converter: if the ParseOp is a Connection,
+             * External, Offset or AccessAs, it means that the comments in the
+             * FirstChild belongs to their parent due to the parsing order in
+             * the .y files. To correct this, take the comments in the
+             * FirstChild place it in the parent. This also means that
+             * legitimate comments for the child gets put to the parent.
+             */
+            if (Gbl_CaptureComments &&
+                ((ParseOpcode == PARSEOP_CONNECTION) ||
+                 (ParseOpcode == PARSEOP_EXTERNAL) ||
+                 (ParseOpcode == PARSEOP_OFFSET) ||
+                 (ParseOpcode == PARSEOP_ACCESSAS)))
+            {
+                Op->Asl.CommentList      = Child->Asl.CommentList;
+                Op->Asl.EndBlkComment    = Child->Asl.EndBlkComment;
+                Op->Asl.InlineComment    = Child->Asl.InlineComment;
+                Op->Asl.FileChanged      = Child->Asl.FileChanged;
+
+                Child->Asl.CommentList   = NULL;
+                Child->Asl.EndBlkComment = NULL;
+                Child->Asl.InlineComment = NULL;
+                Child->Asl.FileChanged   = FALSE;
+
+                /*
+                 * These do not need to be "passed off". They can be copied
+                 * because the code for these opcodes should be printed in the
+                 * same file.
+                 */
+                Op->Asl.Filename         = Child->Asl.Filename;
+                Op->Asl.ParentFilename   = Child->Asl.ParentFilename;
+            }
+        }
+
+        /* Point all children to parent */
+
+        Child->Asl.Parent = Op;
+
+        /* Link children in a peer list */
+
+        if (PrevChild)
+        {
+            PrevChild->Asl.Next = Child;
+        };
+
+        /* Get the comment from last child in the resource template call */
+
+        if (Gbl_CaptureComments &&
+            (Op->Asl.ParseOpcode == PARSEOP_RESOURCETEMPLATE))
+        {
+            CvDbgPrint ("Transferred current comment list to this op.\n");
+            Op->Asl.CommentList = Child->Asl.CommentList;
+            Child->Asl.CommentList = NULL;
+
+            Op->Asl.InlineComment = Child->Asl.InlineComment;
+            Child->Asl.InlineComment = NULL;
+        }
+
+        /*
+         * This child might be a list, point all ops in the list
+         * to the same parent
+         */
+        while (Child->Asl.Next)
+        {
+            Child = Child->Asl.Next;
+            Child->Asl.Parent = Op;
+        }
+
+        PrevChild = Child;
+    }
+
+    va_end(ap);
+    DbgPrint (ASL_PARSE_OUTPUT, "\n");
+    return (Op);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    TrCreateLeafOp
+ *
+ * PARAMETERS:  ParseOpcode         - New opcode to be assigned to the op
+ *
+ * RETURN:      Pointer to the new op. Aborts on allocation failure
+ *
+ * DESCRIPTION: Create a simple leaf op (no children or peers, and no value
+ *              assigned to the op)
+ *
+ ******************************************************************************/
+
+ACPI_PARSE_OBJECT *
+TrCreateLeafOp (
+    UINT32                  ParseOpcode)
+{
+    ACPI_PARSE_OBJECT       *Op;
+
+
+    Op = TrAllocateOp (ParseOpcode);
+
+    DbgPrint (ASL_PARSE_OUTPUT,
+        "\nCreateLeafOp  Ln/Col %u/%u NewOp %p  Op %s\n\n",
+        Op->Asl.LineNumber, Op->Asl.Column, Op, UtGetOpName (ParseOpcode));
+
+    return (Op);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    TrCreateValuedLeafOp
+ *
+ * PARAMETERS:  ParseOpcode         - New opcode to be assigned to the op
+ *              Value               - Value to be assigned to the op
+ *
+ * RETURN:      Pointer to the new op. Aborts on allocation failure
+ *
+ * DESCRIPTION: Create a leaf op (no children or peers) with a value
+ *              assigned to it
+ *
+ ******************************************************************************/
+
+ACPI_PARSE_OBJECT *
+TrCreateValuedLeafOp (
+    UINT32                  ParseOpcode,
+    UINT64                  Value)
+{
+    ACPI_PARSE_OBJECT       *Op;
+
+
+    Op = TrAllocateOp (ParseOpcode);
+    Op->Asl.Value.Integer = Value;
+
+    DbgPrint (ASL_PARSE_OUTPUT,
+        "\nCreateValuedLeafOp  Ln/Col %u/%u NewOp %p  "
+        "Op %s  Value %8.8X%8.8X  ",
+        Op->Asl.LineNumber, Op->Asl.Column, Op, UtGetOpName(ParseOpcode),
+        ACPI_FORMAT_UINT64 (Value));
+
+    switch (ParseOpcode)
+    {
+    case PARSEOP_STRING_LITERAL:
+
+        DbgPrint (ASL_PARSE_OUTPUT, "STRING->%s", Value);
+        break;
+
+    case PARSEOP_NAMESEG:
+
+        DbgPrint (ASL_PARSE_OUTPUT, "NAMESEG->%s", Value);
+        break;
+
+    case PARSEOP_NAMESTRING:
+
+        DbgPrint (ASL_PARSE_OUTPUT, "NAMESTRING->%s", Value);
+        break;
+
+    case PARSEOP_EISAID:
+
+        DbgPrint (ASL_PARSE_OUTPUT, "EISAID->%s", Value);
+        break;
+
+    case PARSEOP_METHOD:
+
+        DbgPrint (ASL_PARSE_OUTPUT, "METHOD");
+        break;
+
+    case PARSEOP_INTEGER:
+
+        DbgPrint (ASL_PARSE_OUTPUT, "INTEGER->%8.8X%8.8X",
+            ACPI_FORMAT_UINT64 (Value));
+        break;
+
+    default:
+        break;
+    }
+
+    DbgPrint (ASL_PARSE_OUTPUT, "\n\n");
+    return (Op);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    TrCreateTargetOp
+ *
+ * PARAMETERS:  OriginalOp          - Op to be copied
+ *
+ * RETURN:      Pointer to the new op. Aborts on allocation failure
+ *
+ * DESCRIPTION: Copy an existing op (and subtree). Used in ASL+ (C-style)
+ *              expressions where the target is the same as one of the
+ *              operands. A new op and subtree must be created from the
+ *              original so that the parse tree can be linked properly.
+ *
+ * NOTE:        This code is specific to target operands that are the last
+ *              operand in an ASL/AML operator. Meaning that the top-level
+ *              parse Op in a possible subtree has a NULL Next pointer.
+ *              This simplifies the recursion.
+ *
+ *              Subtree example:
+ *                  DeRefOf (Local1) += 32
+ *
+ *              This gets converted to:
+ *                  Add (DeRefOf (Local1), 32, DeRefOf (Local1))
+ *
+ *              Each DeRefOf has a single child, Local1. Even more complex
+ *              subtrees can be created via the Index and DeRefOf operators.
+ *
+ ******************************************************************************/
+
+ACPI_PARSE_OBJECT *
+TrCreateTargetOp (
+    ACPI_PARSE_OBJECT       *OriginalOp,
+    ACPI_PARSE_OBJECT       *ParentOp)
+{
+    ACPI_PARSE_OBJECT       *Op;
+
+
+    if (!OriginalOp)
+    {
+        return (NULL);
+    }
+
+    Op = TrGetOpFromCache ();
+
+    /* Copy the pertinent values (omit link pointer fields) */
+
+    Op->Asl.Value               = OriginalOp->Asl.Value;
+    Op->Asl.Filename            = OriginalOp->Asl.Filename;
+    Op->Asl.LineNumber          = OriginalOp->Asl.LineNumber;
+    Op->Asl.LogicalLineNumber   = OriginalOp->Asl.LogicalLineNumber;
+    Op->Asl.LogicalByteOffset   = OriginalOp->Asl.LogicalByteOffset;
+    Op->Asl.Column              = OriginalOp->Asl.Column;
+    Op->Asl.Flags               = OriginalOp->Asl.Flags;
+    Op->Asl.CompileFlags        = OriginalOp->Asl.CompileFlags;
+    Op->Asl.AmlOpcode           = OriginalOp->Asl.AmlOpcode;
+    Op->Asl.ParseOpcode         = OriginalOp->Asl.ParseOpcode;
+    Op->Asl.Parent              = ParentOp;
+
+    UtSetParseOpName (Op);
+
+    /* Copy a possible subtree below this op */
+
+    if (OriginalOp->Asl.Child)
+    {
+        Op->Asl.Child = TrCreateTargetOp (OriginalOp->Asl.Child, Op);
+    }
+
+    if (OriginalOp->Asl.Next) /* Null for top-level op */
+    {
+        Op->Asl.Next = TrCreateTargetOp (OriginalOp->Asl.Next, ParentOp);
+    }
+
+    return (Op);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    TrCreateAssignmentOp
+ *
+ * PARAMETERS:  Target              - Assignment target
+ *              Source              - Assignment source
+ *
+ * RETURN:      Pointer to the new op. Aborts on allocation failure
+ *
+ * DESCRIPTION: Implements the C-style '=' operator. It changes the parse
+ *              tree if possible to utilize the last argument of the math
+ *              operators which is a target operand -- thus saving invocation
+ *              of and additional Store() operator. An optimization.
+ *
+ ******************************************************************************/
+
+ACPI_PARSE_OBJECT *
+TrCreateAssignmentOp (
+    ACPI_PARSE_OBJECT       *Target,
+    ACPI_PARSE_OBJECT       *Source)
+{
+    ACPI_PARSE_OBJECT       *TargetOp;
+    ACPI_PARSE_OBJECT       *SourceOp1;
+    ACPI_PARSE_OBJECT       *SourceOp2;
+    ACPI_PARSE_OBJECT       *Operator;
+
+
+    DbgPrint (ASL_PARSE_OUTPUT,
+        "\nTrCreateAssignmentOp  Line [%u to %u] Source %s Target %s\n",
+        Source->Asl.LineNumber, Source->Asl.EndLine,
+        UtGetOpName (Source->Asl.ParseOpcode),
+        UtGetOpName (Target->Asl.ParseOpcode));
+
+    TrSetOpFlags (Target, OP_IS_TARGET);
+
+    switch (Source->Asl.ParseOpcode)
+    {
+    /*
+     * Only these operators can be optimized because they have
+     * a target operand
+     */
+    case PARSEOP_ADD:
+    case PARSEOP_AND:
+    case PARSEOP_DIVIDE:
+    case PARSEOP_INDEX:
+    case PARSEOP_MOD:
+    case PARSEOP_MULTIPLY:
+    case PARSEOP_NOT:
+    case PARSEOP_OR:
+    case PARSEOP_SHIFTLEFT:
+    case PARSEOP_SHIFTRIGHT:
+    case PARSEOP_SUBTRACT:
+    case PARSEOP_XOR:
+
+        break;
+
+    /* Otherwise, just create a normal Store operator */
+
+    default:
+        goto CannotOptimize;
+    }
+
+    /*
+     * Transform the parse tree such that the target is moved to the
+     * last operand of the operator
+     */
+    SourceOp1 = Source->Asl.Child;
+    SourceOp2 = SourceOp1->Asl.Next;
+
+    /* NOT only has one operand, but has a target */
+
+    if (Source->Asl.ParseOpcode == PARSEOP_NOT)
+    {
+        SourceOp2 = SourceOp1;
+    }
+
+    /* DIVIDE has an extra target operand (remainder) */
+
+    if (Source->Asl.ParseOpcode == PARSEOP_DIVIDE)
+    {
+        SourceOp2 = SourceOp2->Asl.Next;
+    }
+
+    TargetOp = SourceOp2->Asl.Next;
+
+    /*
+     * Can't perform this optimization if there already is a target
+     * for the operator (ZERO is a "no target" placeholder).
+     */
+    if (TargetOp->Asl.ParseOpcode != PARSEOP_ZERO)
+    {
+        goto CannotOptimize;
+    }
+
+    /* Link in the target as the final operand */
+
+    SourceOp2->Asl.Next = Target;
+    Target->Asl.Parent = Source;
+    return (Source);
+
+
+CannotOptimize:
+
+    Operator = TrAllocateOp (PARSEOP_STORE);
+    TrLinkOpChildren (Operator, 2, Source, Target);
+
+    /* Set the appropriate line numbers for the new op */
+
+    Operator->Asl.LineNumber        = Target->Asl.LineNumber;
+    Operator->Asl.LogicalLineNumber = Target->Asl.LogicalLineNumber;
+    Operator->Asl.LogicalByteOffset = Target->Asl.LogicalByteOffset;
+    Operator->Asl.Column            = Target->Asl.Column;
+
+    return (Operator);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    TrCreateNullTargetOp
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Pointer to the new op. Aborts on allocation failure
+ *
+ * DESCRIPTION: Create a "null" target op. This is defined by the ACPI
+ *              specification to be a zero AML opcode, and indicates that
+ *              no target has been specified for the parent operation
+ *
+ ******************************************************************************/
+
+ACPI_PARSE_OBJECT *
+TrCreateNullTargetOp (
+    void)
+{
+    ACPI_PARSE_OBJECT       *Op;
+
+
+    Op = TrAllocateOp (PARSEOP_ZERO);
+    Op->Asl.CompileFlags |= (OP_IS_TARGET | OP_COMPILE_TIME_CONST);
+
+    DbgPrint (ASL_PARSE_OUTPUT,
+        "\nCreateNullTargetOp  Ln/Col %u/%u NewOp %p  Op %s\n",
+        Op->Asl.LineNumber, Op->Asl.Column, Op,
+        UtGetOpName (Op->Asl.ParseOpcode));
+
+    return (Op);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    TrCreateConstantLeafOp
+ *
+ * PARAMETERS:  ParseOpcode         - The constant opcode
+ *
+ * RETURN:      Pointer to the new op. Aborts on allocation failure
+ *
+ * DESCRIPTION: Create a leaf op (no children or peers) for one of the
+ *              special constants - __LINE__, __FILE__, and __DATE__.
+ *
+ * Note: An implemenation of __FUNC__ cannot happen here because we don't
+ * have a full parse tree at this time and cannot find the parent control
+ * method. If it is ever needed, __FUNC__ must be implemented later, after
+ * the parse tree has been fully constructed.
+ *
+ ******************************************************************************/
+
+ACPI_PARSE_OBJECT *
+TrCreateConstantLeafOp (
+    UINT32                  ParseOpcode)
+{
+    ACPI_PARSE_OBJECT       *Op = NULL;
+    time_t                  CurrentTime;
+    char                    *StaticTimeString;
+    char                    *TimeString;
+    char                    *Filename;
+
+
+    switch (ParseOpcode)
+    {
+    case PARSEOP___LINE__:
+
+        Op = TrAllocateOp (PARSEOP_INTEGER);
+        Op->Asl.Value.Integer = Op->Asl.LineNumber;
+        break;
+
+    case PARSEOP___PATH__:
+
+        Op = TrAllocateOp (PARSEOP_STRING_LITERAL);
+
+        /* Op.Asl.Filename contains the full pathname to the file */
+
+        Op->Asl.Value.String = Op->Asl.Filename;
+        break;
+
+    case PARSEOP___FILE__:
+
+        Op = TrAllocateOp (PARSEOP_STRING_LITERAL);
+
+        /* Get the simple filename from the full path */
+
+        FlSplitInputPathname (Op->Asl.Filename, NULL, &Filename);
+        Op->Asl.Value.String = Filename;
+        break;
+
+    case PARSEOP___DATE__:
+
+        Op = TrAllocateOp (PARSEOP_STRING_LITERAL);
+
+        /* Get a copy of the current time */
+
+        CurrentTime = time (NULL);
+        StaticTimeString = ctime (&CurrentTime);
+        TimeString = UtLocalCalloc (strlen (StaticTimeString) + 1);
+        strcpy (TimeString, StaticTimeString);
+
+        TimeString[strlen(TimeString) -1] = 0;  /* Remove trailing newline */
+        Op->Asl.Value.String = TimeString;
+        break;
+
+    default: /* This would be an internal error */
+
+        return (NULL);
+    }
+
+    DbgPrint (ASL_PARSE_OUTPUT,
+        "\nCreateConstantLeafOp  Ln/Col %u/%u NewOp %p  "
+        "Op %s  Value %8.8X%8.8X  \n",
+        Op->Asl.LineNumber, Op->Asl.Column, Op, UtGetOpName (ParseOpcode),
+        ACPI_FORMAT_UINT64 (Op->Asl.Value.Integer));
+
+    return (Op);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    TrAllocateOp
+ *
+ * PARAMETERS:  ParseOpcode         - Opcode to be assigned to the op
+ *
+ * RETURN:      New parse op. Aborts on allocation failure
+ *
+ * DESCRIPTION: Allocate and initialize a new parse op for the parse tree
+ *
+ ******************************************************************************/
+
+ACPI_PARSE_OBJECT *
+TrAllocateOp (
+    UINT32                  ParseOpcode)
+{
+    ACPI_PARSE_OBJECT       *Op;
+    ACPI_PARSE_OBJECT       *LatestOp;
+
+
+    Op = TrGetOpFromCache ();
+
+    Op->Asl.ParseOpcode       = (UINT16) ParseOpcode;
+    Op->Asl.Filename          = Gbl_Files[ASL_FILE_INPUT].Filename;
+    Op->Asl.LineNumber        = Gbl_CurrentLineNumber;
+    Op->Asl.LogicalLineNumber = Gbl_LogicalLineNumber;
+    Op->Asl.LogicalByteOffset = Gbl_CurrentLineOffset;
+    Op->Asl.Column            = Gbl_CurrentColumn;
+
+    UtSetParseOpName (Op);
+
+    /* The following is for capturing comments */
+
+    if(Gbl_CaptureComments)
+    {
+        LatestOp = Gbl_CommentState.LatestParseOp;
+        Op->Asl.InlineComment     = NULL;
+        Op->Asl.EndNodeComment    = NULL;
+        Op->Asl.CommentList       = NULL;
+        Op->Asl.FileChanged       = FALSE;
+
+        /*
+         * Check to see if the file name has changed before resetting the
+         * latest parse op.
+         */
+        if (LatestOp &&
+            (ParseOpcode != PARSEOP_INCLUDE) &&
+            (ParseOpcode != PARSEOP_INCLUDE_END) &&
+            strcmp (LatestOp->Asl.Filename, Op->Asl.Filename))
+        {
+            CvDbgPrint ("latest op: %s\n", LatestOp->Asl.ParseOpName);
+            Op->Asl.FileChanged = TRUE;
+            if (Gbl_IncludeFileStack)
+            {
+                Op->Asl.ParentFilename = Gbl_IncludeFileStack->Filename;
+            }
+            else
+            {
+                Op->Asl.ParentFilename = NULL;
+            }
+        }
+
+        Gbl_CommentState.LatestParseOp = Op;
+        CvDbgPrint ("TrAllocateOp=Set latest parse op to this op.\n");
+        CvDbgPrint ("           Op->Asl.ParseOpName = %s\n",
+            Gbl_CommentState.LatestParseOp->Asl.ParseOpName);
+        CvDbgPrint ("           Op->Asl.ParseOpcode = 0x%x\n", ParseOpcode);
+
+        if (Op->Asl.FileChanged)
+        {
+            CvDbgPrint("    file has been changed!\n");
+        }
+
+        /*
+         * if this parse op's syntax uses () and {} (i.e. Package(1){0x00}) then
+         * set a flag in the comment state. This facilitates paring comments for
+         * these types of opcodes.
+         */
+        if ((CvParseOpBlockType(Op) == (BLOCK_PAREN | BLOCK_BRACE)) &&
+            (ParseOpcode != PARSEOP_DEFINITION_BLOCK))
+        {
+            CvDbgPrint ("Parsing paren/Brace op now!\n");
+            Gbl_CommentState.ParsingParenBraceNode = Op;
+        }
+
+        if (Gbl_CommentListHead)
+        {
+            CvDbgPrint ("Transferring...\n");
+            Op->Asl.CommentList = Gbl_CommentListHead;
+            Gbl_CommentListHead = NULL;
+            Gbl_CommentListTail = NULL;
+            CvDbgPrint ("    Transferred current comment list to this op.\n");
+            CvDbgPrint ("    %s\n", Op->Asl.CommentList->Comment);
+        }
+
+        if (Gbl_InlineCommentBuffer)
+        {
+            Op->Asl.InlineComment = Gbl_InlineCommentBuffer;
+            Gbl_InlineCommentBuffer = NULL;
+            CvDbgPrint ("Transferred current inline comment list to this op.\n");
+        }
+    }
+
+    return (Op);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    TrGetOpFromCache
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      New parse op. Aborts on allocation failure
+ *
+ * DESCRIPTION: Allocate a new parse op for the parse tree. Bypass the local
+ *              dynamic memory manager for performance reasons (This has a
+ *              major impact on the speed of the compiler.)
+ *
+ ******************************************************************************/
+
+static ACPI_PARSE_OBJECT *
+TrGetOpFromCache (
+    void)
+{
+    ASL_CACHE_INFO          *Cache;
+
+
+    if (Gbl_ParseOpCacheNext >= Gbl_ParseOpCacheLast)
+    {
+        /* Allocate a new buffer */
+
+        Cache = UtLocalCalloc (sizeof (Cache->Next) +
+            (sizeof (ACPI_PARSE_OBJECT) * ASL_PARSEOP_CACHE_SIZE));
+
+        /* Link new cache buffer to head of list */
+
+        Cache->Next = Gbl_ParseOpCacheList;
+        Gbl_ParseOpCacheList = Cache;
+
+        /* Setup cache management pointers */
+
+        Gbl_ParseOpCacheNext = ACPI_CAST_PTR (ACPI_PARSE_OBJECT, Cache->Buffer);
+        Gbl_ParseOpCacheLast = Gbl_ParseOpCacheNext + ASL_PARSEOP_CACHE_SIZE;
+    }
+
+    Gbl_ParseOpCount++;
+    return (Gbl_ParseOpCacheNext++);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    TrPrintOpFlags
+ *
+ * PARAMETERS:  Flags               - Flags word to be decoded
+ *              OutputLevel         - Debug output level: ASL_TREE_OUTPUT etc.
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Decode a flags word to text. Displays all flags that are set.
+ *
+ ******************************************************************************/
+
+void
+TrPrintOpFlags (
+    UINT32                  Flags,
+    UINT32                  OutputLevel)
+{
+    UINT32                  FlagBit = 1;
+    UINT32                  i;
+
+
+    for (i = 0; i < ACPI_NUM_OP_FLAGS; i++)
+    {
+        if (Flags & FlagBit)
+        {
+            DbgPrint (OutputLevel, " %s", Gbl_OpFlagNames[i]);
+        }
+
+        FlagBit <<= 1;
+    }
+}