This commit was generated by cvs2svn to compensate for changes in r84493,

which included commits to RCS files with non-trunk default branches.

1 files changed, 424 insertions, 0 deletions

diff --git a/sys/contrib/dev/acpica/utmath.c b/sys/contrib/dev/acpica/utmath.c
new file mode 100644
index 0000000..eb4fb07
--- /dev/null
+++ b/sys/contrib/dev/acpica/utmath.c
@@ -0,0 +1,424 @@
+/*******************************************************************************
+ *
+ * Module Name: utmath - Integer math support routines
+ *              $Revision: 5 $
+ *
+ ******************************************************************************/
+
+/******************************************************************************
+ *
+ * 1. Copyright Notice
+ *
+ * Some or all of this work - Copyright (c) 1999, 2000, 2001, 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 __UTMATH_C__
+
+#include "acpi.h"
+
+
+#define _COMPONENT          ACPI_UTILITIES
+        MODULE_NAME         ("utmath")
+
+/*
+ * Support for double-precision integer divide.  This code is included here
+ * in order to support kernel environments where the double-precision math
+ * library is not available.
+ */
+
+#ifndef ACPI_USE_NATIVE_DIVIDE     
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiUtShortDivide
+ *
+ * PARAMETERS:  InDividend          - Pointer to the dividend
+ *              Divisor             - 32-bit divisor
+ *              OutQuotient         - Pointer to where the quotient is returned
+ *              OutRemainder        - Pointer to where the remainder is returned
+ *
+ * RETURN:      Status (Checks for divide-by-zero)
+ *
+ * DESCRIPTION: Perform a short (maximum 64 bits divided by 32 bits)
+ *              divide and modulo.  The result is a 64-bit quotient and a
+ *              32-bit remainder.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiUtShortDivide (
+    ACPI_INTEGER            *InDividend,
+    UINT32                  Divisor,
+    ACPI_INTEGER            *OutQuotient,
+    UINT32                  *OutRemainder)
+{
+    UINT64_OVERLAY          Dividend;
+    UINT64_OVERLAY          Quotient;
+    UINT32                  Remainder32;
+
+
+    FUNCTION_TRACE ("UtShortDivide");
+
+    Dividend.Full = *InDividend;
+
+    /* Always check for a zero divisor */
+
+    if (Divisor == 0)
+    {
+        return_ACPI_STATUS (AE_AML_DIVIDE_BY_ZERO);
+    }
+
+    /*
+     * The quotient is 64 bits, the remainder is always 32 bits,
+     * and is generated by the second divide.
+     */
+    ACPI_DIV_64_BY_32 (0, Dividend.Part.Hi, Divisor, 
+                       Quotient.Part.Hi, Remainder32);
+    ACPI_DIV_64_BY_32 (Remainder32, Dividend.Part.Lo,  Divisor, 
+                       Quotient.Part.Lo, Remainder32);
+
+    /* Return only what was requested */
+
+    if (OutQuotient)
+    {
+        *OutQuotient = Quotient.Full;
+    }
+    if (OutRemainder)
+    {
+        *OutRemainder = Remainder32;
+    }
+
+    return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiUtDivide
+ *
+ * PARAMETERS:  InDividend          - Pointer to the dividend
+ *              InDivisor           - Pointer to the divisor
+ *              OutQuotient         - Pointer to where the quotient is returned
+ *              OutRemainder        - Pointer to where the remainder is returned
+ *
+ * RETURN:      Status (Checks for divide-by-zero)
+ *
+ * DESCRIPTION: Perform a divide and modulo.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiUtDivide (
+    ACPI_INTEGER            *InDividend,
+    ACPI_INTEGER            *InDivisor,
+    ACPI_INTEGER            *OutQuotient,
+    ACPI_INTEGER            *OutRemainder)
+{
+    UINT64_OVERLAY          Dividend;
+    UINT64_OVERLAY          Divisor;
+    UINT64_OVERLAY          Quotient;
+    UINT64_OVERLAY          Remainder;
+    UINT64_OVERLAY          NormalizedDividend;
+    UINT64_OVERLAY          NormalizedDivisor;
+    UINT32                  Partial1;
+    UINT64_OVERLAY          Partial2;
+    UINT64_OVERLAY          Partial3;
+
+
+    FUNCTION_TRACE ("UtDivide");
+
+
+    /* Always check for a zero divisor */
+
+    if (*InDivisor == 0)
+    {
+        return_ACPI_STATUS (AE_AML_DIVIDE_BY_ZERO);
+    }
+
+    Divisor.Full  = *InDivisor;
+    Dividend.Full = *InDividend;
+    if (Divisor.Part.Hi == 0)
+    {
+        /*
+         * 1) Simplest case is where the divisor is 32 bits, we can
+         * just do two divides
+         */
+        Remainder.Part.Hi = 0;
+
+        /*
+         * The quotient is 64 bits, the remainder is always 32 bits,
+         * and is generated by the second divide.
+         */
+        ACPI_DIV_64_BY_32 (0, Dividend.Part.Hi, Divisor.Part.Lo, 
+                           Quotient.Part.Hi, Partial1);
+        ACPI_DIV_64_BY_32 (Partial1, Dividend.Part.Lo, Divisor.Part.Lo, 
+                           Quotient.Part.Lo, Remainder.Part.Lo);
+    }
+
+    else
+    {
+        /*
+         * 2) The general case where the divisor is a full 64 bits
+         * is more difficult
+         */
+        Quotient.Part.Hi   = 0;
+        NormalizedDividend = Dividend;
+        NormalizedDivisor  = Divisor;
+
+        /* Normalize the operands (shift until the divisor is < 32 bits) */
+
+        do
+        {
+            ACPI_SHIFT_RIGHT_64 (NormalizedDivisor.Part.Hi, 
+                                 NormalizedDivisor.Part.Lo);
+            ACPI_SHIFT_RIGHT_64 (NormalizedDividend.Part.Hi, 
+                                 NormalizedDividend.Part.Lo);
+
+        } while (NormalizedDivisor.Part.Hi != 0);
+
+        /* Partial divide */
+
+        ACPI_DIV_64_BY_32 (NormalizedDividend.Part.Hi, 
+                           NormalizedDividend.Part.Lo, 
+                           NormalizedDivisor.Part.Lo, 
+                           Quotient.Part.Lo, Partial1);
+
+        /*
+         * The quotient is always 32 bits, and simply requires adjustment.
+         * The 64-bit remainder must be generated.
+         */
+        Partial1      = Quotient.Part.Lo * Divisor.Part.Hi;
+        Partial2.Full = (ACPI_INTEGER) Quotient.Part.Lo * Divisor.Part.Lo;
+        Partial3.Full = Partial2.Part.Hi + Partial1;
+
+        Remainder.Part.Hi = Partial3.Part.Lo;
+        Remainder.Part.Lo = Partial2.Part.Lo;
+
+        if (Partial3.Part.Hi == 0)
+        {
+            if (Partial3.Part.Lo >= Dividend.Part.Hi)
+            {
+                if (Partial3.Part.Lo == Dividend.Part.Hi)
+                {
+                    if (Partial2.Part.Lo > Dividend.Part.Lo)
+                    {
+                        Quotient.Part.Lo--;
+                        Remainder.Full -= Divisor.Full;
+                    }
+                }
+                else
+                {
+                    Quotient.Part.Lo--;
+                    Remainder.Full -= Divisor.Full;
+                }
+            }
+
+            Remainder.Full    = Remainder.Full - Dividend.Full;
+            Remainder.Part.Hi = -((INT32) Remainder.Part.Hi);
+            Remainder.Part.Lo = -((INT32) Remainder.Part.Lo);
+
+            if (Remainder.Part.Lo)
+            {
+                Remainder.Part.Hi--;
+            }
+        }
+    }
+
+    /* Return only what was requested */
+
+    if (OutQuotient)
+    {
+        *OutQuotient = Quotient.Full;
+    }
+    if (OutRemainder)
+    {
+        *OutRemainder = Remainder.Full;
+    }
+
+    return_ACPI_STATUS (AE_OK);
+}
+
+#else
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiUtShortDivide, AcpiUtDivide
+ *
+ * DESCRIPTION: Native versions of the UtDivide functions. Use these if either
+ *              1) The target is a 64-bit platform and therefore 64-bit
+ *                 integer math is supported directly by the machine.
+ *              2) The target is a 32-bit or 16-bit platform, and the 
+ *                 double-precision integer math library is available to 
+ *                 perform the divide.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiUtShortDivide (
+    ACPI_INTEGER            *InDividend,
+    UINT32                  Divisor,
+    ACPI_INTEGER            *OutQuotient,
+    UINT32                  *OutRemainder)
+{
+
+    FUNCTION_TRACE ("UtShortDivide");
+
+
+    /* Always check for a zero divisor */
+
+    if (Divisor == 0)
+    {
+        return_ACPI_STATUS (AE_AML_DIVIDE_BY_ZERO);
+    }
+
+    /* Return only what was requested */
+
+    if (OutQuotient)
+    {
+        *OutQuotient = *InDividend / Divisor;
+    }
+    if (OutRemainder)
+    {
+        *OutRemainder = (UINT32) *InDividend % Divisor;
+    }
+
+    return_ACPI_STATUS (AE_OK);
+}
+
+ACPI_STATUS
+AcpiUtDivide (
+    ACPI_INTEGER            *InDividend,
+    ACPI_INTEGER            *InDivisor,
+    ACPI_INTEGER            *OutQuotient,
+    ACPI_INTEGER            *OutRemainder)
+{
+    FUNCTION_TRACE ("UtDivide");
+
+
+    /* Always check for a zero divisor */
+
+    if (*InDivisor == 0)
+    {
+        return_ACPI_STATUS (AE_AML_DIVIDE_BY_ZERO);
+    }
+
+
+    /* Return only what was requested */
+
+    if (OutQuotient)
+    {
+        *OutQuotient = *InDividend / *InDivisor;
+    }
+    if (OutRemainder)
+    {
+        *OutRemainder = *InDividend % *InDivisor;
+    }
+
+    return_ACPI_STATUS (AE_OK)
+}
+
+#endif
+
+