195b482a8SLen Brown /****************************************************************************** 295b482a8SLen Brown * 395b482a8SLen Brown * Module Name: exmisc - ACPI AML (p-code) execution - specific opcodes 495b482a8SLen Brown * 595b482a8SLen Brown *****************************************************************************/ 695b482a8SLen Brown 795b482a8SLen Brown /* 87735ca0eSBob Moore * Copyright (C) 2000 - 2017, Intel Corp. 995b482a8SLen Brown * All rights reserved. 1095b482a8SLen Brown * 1195b482a8SLen Brown * Redistribution and use in source and binary forms, with or without 1295b482a8SLen Brown * modification, are permitted provided that the following conditions 1395b482a8SLen Brown * are met: 1495b482a8SLen Brown * 1. Redistributions of source code must retain the above copyright 1595b482a8SLen Brown * notice, this list of conditions, and the following disclaimer, 1695b482a8SLen Brown * without modification. 1795b482a8SLen Brown * 2. Redistributions in binary form must reproduce at minimum a disclaimer 1895b482a8SLen Brown * substantially similar to the "NO WARRANTY" disclaimer below 1995b482a8SLen Brown * ("Disclaimer") and any redistribution must be conditioned upon 2095b482a8SLen Brown * including a substantially similar Disclaimer requirement for further 2195b482a8SLen Brown * binary redistribution. 2295b482a8SLen Brown * 3. Neither the names of the above-listed copyright holders nor the names 2395b482a8SLen Brown * of any contributors may be used to endorse or promote products derived 2495b482a8SLen Brown * from this software without specific prior written permission. 2595b482a8SLen Brown * 2695b482a8SLen Brown * Alternatively, this software may be distributed under the terms of the 2795b482a8SLen Brown * GNU General Public License ("GPL") version 2 as published by the Free 2895b482a8SLen Brown * Software Foundation. 2995b482a8SLen Brown * 3095b482a8SLen Brown * NO WARRANTY 3195b482a8SLen Brown * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 3295b482a8SLen Brown * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 3395b482a8SLen Brown * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 3495b482a8SLen Brown * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 3595b482a8SLen Brown * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 3695b482a8SLen Brown * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 3795b482a8SLen Brown * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3895b482a8SLen Brown * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 3995b482a8SLen Brown * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 4095b482a8SLen Brown * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 4195b482a8SLen Brown * POSSIBILITY OF SUCH DAMAGES. 4295b482a8SLen Brown */ 4395b482a8SLen Brown 4495b482a8SLen Brown #include <acpi/acpi.h> 45e2f7a777SLen Brown #include "accommon.h" 46e2f7a777SLen Brown #include "acinterp.h" 47e2f7a777SLen Brown #include "amlcode.h" 4895b482a8SLen Brown 4995b482a8SLen Brown #define _COMPONENT ACPI_EXECUTER 5095b482a8SLen Brown ACPI_MODULE_NAME("exmisc") 5195b482a8SLen Brown 5295b482a8SLen Brown /******************************************************************************* 5395b482a8SLen Brown * 5495b482a8SLen Brown * FUNCTION: acpi_ex_get_object_reference 5595b482a8SLen Brown * 5695b482a8SLen Brown * PARAMETERS: obj_desc - Create a reference to this object 5795b482a8SLen Brown * return_desc - Where to store the reference 5895b482a8SLen Brown * walk_state - Current state 5995b482a8SLen Brown * 6095b482a8SLen Brown * RETURN: Status 6195b482a8SLen Brown * 6295b482a8SLen Brown * DESCRIPTION: Obtain and return a "reference" to the target object 6395b482a8SLen Brown * Common code for the ref_of_op and the cond_ref_of_op. 6495b482a8SLen Brown * 6595b482a8SLen Brown ******************************************************************************/ 6695b482a8SLen Brown acpi_status 6795b482a8SLen Brown acpi_ex_get_object_reference(union acpi_operand_object *obj_desc, 6895b482a8SLen Brown union acpi_operand_object **return_desc, 6995b482a8SLen Brown struct acpi_walk_state *walk_state) 7095b482a8SLen Brown { 7195b482a8SLen Brown union acpi_operand_object *reference_obj; 7295b482a8SLen Brown union acpi_operand_object *referenced_obj; 7395b482a8SLen Brown 7495b482a8SLen Brown ACPI_FUNCTION_TRACE_PTR(ex_get_object_reference, obj_desc); 7595b482a8SLen Brown 7695b482a8SLen Brown *return_desc = NULL; 7795b482a8SLen Brown 7895b482a8SLen Brown switch (ACPI_GET_DESCRIPTOR_TYPE(obj_desc)) { 7995b482a8SLen Brown case ACPI_DESC_TYPE_OPERAND: 8095b482a8SLen Brown 813371c19cSBob Moore if (obj_desc->common.type != ACPI_TYPE_LOCAL_REFERENCE) { 8295b482a8SLen Brown return_ACPI_STATUS(AE_AML_OPERAND_TYPE); 8395b482a8SLen Brown } 8495b482a8SLen Brown 8595b482a8SLen Brown /* 8695b482a8SLen Brown * Must be a reference to a Local or Arg 8795b482a8SLen Brown */ 8895b482a8SLen Brown switch (obj_desc->reference.class) { 8995b482a8SLen Brown case ACPI_REFCLASS_LOCAL: 9095b482a8SLen Brown case ACPI_REFCLASS_ARG: 9195b482a8SLen Brown case ACPI_REFCLASS_DEBUG: 9295b482a8SLen Brown 9395b482a8SLen Brown /* The referenced object is the pseudo-node for the local/arg */ 9495b482a8SLen Brown 9595b482a8SLen Brown referenced_obj = obj_desc->reference.object; 9695b482a8SLen Brown break; 9795b482a8SLen Brown 9895b482a8SLen Brown default: 9995b482a8SLen Brown 100395ec731SBob Moore ACPI_ERROR((AE_INFO, "Invalid Reference Class 0x%2.2X", 10195b482a8SLen Brown obj_desc->reference.class)); 102395ec731SBob Moore return_ACPI_STATUS(AE_AML_OPERAND_TYPE); 10395b482a8SLen Brown } 10495b482a8SLen Brown break; 10595b482a8SLen Brown 10695b482a8SLen Brown case ACPI_DESC_TYPE_NAMED: 10795b482a8SLen Brown /* 10895b482a8SLen Brown * A named reference that has already been resolved to a Node 10995b482a8SLen Brown */ 11095b482a8SLen Brown referenced_obj = obj_desc; 11195b482a8SLen Brown break; 11295b482a8SLen Brown 11395b482a8SLen Brown default: 11495b482a8SLen Brown 115f6a22b0bSBob Moore ACPI_ERROR((AE_INFO, "Invalid descriptor type 0x%X", 11695b482a8SLen Brown ACPI_GET_DESCRIPTOR_TYPE(obj_desc))); 11795b482a8SLen Brown return_ACPI_STATUS(AE_TYPE); 11895b482a8SLen Brown } 11995b482a8SLen Brown 12095b482a8SLen Brown /* Create a new reference object */ 12195b482a8SLen Brown 12295b482a8SLen Brown reference_obj = 12395b482a8SLen Brown acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_REFERENCE); 12495b482a8SLen Brown if (!reference_obj) { 12595b482a8SLen Brown return_ACPI_STATUS(AE_NO_MEMORY); 12695b482a8SLen Brown } 12795b482a8SLen Brown 12895b482a8SLen Brown reference_obj->reference.class = ACPI_REFCLASS_REFOF; 12995b482a8SLen Brown reference_obj->reference.object = referenced_obj; 13095b482a8SLen Brown *return_desc = reference_obj; 13195b482a8SLen Brown 13295b482a8SLen Brown ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 13395b482a8SLen Brown "Object %p Type [%s], returning Reference %p\n", 13495b482a8SLen Brown obj_desc, acpi_ut_get_object_type_name(obj_desc), 13595b482a8SLen Brown *return_desc)); 13695b482a8SLen Brown 13795b482a8SLen Brown return_ACPI_STATUS(AE_OK); 13895b482a8SLen Brown } 13995b482a8SLen Brown 14095b482a8SLen Brown /******************************************************************************* 14195b482a8SLen Brown * 14295b482a8SLen Brown * FUNCTION: acpi_ex_do_math_op 14395b482a8SLen Brown * 144ba494beeSBob Moore * PARAMETERS: opcode - AML opcode 145ba494beeSBob Moore * integer0 - Integer operand #0 146ba494beeSBob Moore * integer1 - Integer operand #1 14795b482a8SLen Brown * 14895b482a8SLen Brown * RETURN: Integer result of the operation 14995b482a8SLen Brown * 15095b482a8SLen Brown * DESCRIPTION: Execute a math AML opcode. The purpose of having all of the 15195b482a8SLen Brown * math functions here is to prevent a lot of pointer dereferencing 15295b482a8SLen Brown * to obtain the operands. 15395b482a8SLen Brown * 15495b482a8SLen Brown ******************************************************************************/ 15595b482a8SLen Brown 1565df7e6cbSBob Moore u64 acpi_ex_do_math_op(u16 opcode, u64 integer0, u64 integer1) 15795b482a8SLen Brown { 15895b482a8SLen Brown 15995b482a8SLen Brown ACPI_FUNCTION_ENTRY(); 16095b482a8SLen Brown 16195b482a8SLen Brown switch (opcode) { 16295b482a8SLen Brown case AML_ADD_OP: /* Add (Integer0, Integer1, Result) */ 16395b482a8SLen Brown 16495b482a8SLen Brown return (integer0 + integer1); 16595b482a8SLen Brown 16695b482a8SLen Brown case AML_BIT_AND_OP: /* And (Integer0, Integer1, Result) */ 16795b482a8SLen Brown 16895b482a8SLen Brown return (integer0 & integer1); 16995b482a8SLen Brown 17095b482a8SLen Brown case AML_BIT_NAND_OP: /* NAnd (Integer0, Integer1, Result) */ 17195b482a8SLen Brown 17295b482a8SLen Brown return (~(integer0 & integer1)); 17395b482a8SLen Brown 17495b482a8SLen Brown case AML_BIT_OR_OP: /* Or (Integer0, Integer1, Result) */ 17595b482a8SLen Brown 17695b482a8SLen Brown return (integer0 | integer1); 17795b482a8SLen Brown 17895b482a8SLen Brown case AML_BIT_NOR_OP: /* NOr (Integer0, Integer1, Result) */ 17995b482a8SLen Brown 18095b482a8SLen Brown return (~(integer0 | integer1)); 18195b482a8SLen Brown 18295b482a8SLen Brown case AML_BIT_XOR_OP: /* XOr (Integer0, Integer1, Result) */ 18395b482a8SLen Brown 18495b482a8SLen Brown return (integer0 ^ integer1); 18595b482a8SLen Brown 18695b482a8SLen Brown case AML_MULTIPLY_OP: /* Multiply (Integer0, Integer1, Result) */ 18795b482a8SLen Brown 18895b482a8SLen Brown return (integer0 * integer1); 18995b482a8SLen Brown 19095b482a8SLen Brown case AML_SHIFT_LEFT_OP: /* shift_left (Operand, shift_count, Result) */ 19195b482a8SLen Brown 19295b482a8SLen Brown /* 19395b482a8SLen Brown * We need to check if the shiftcount is larger than the integer bit 19495b482a8SLen Brown * width since the behavior of this is not well-defined in the C language. 19595b482a8SLen Brown */ 19695b482a8SLen Brown if (integer1 >= acpi_gbl_integer_bit_width) { 19795b482a8SLen Brown return (0); 19895b482a8SLen Brown } 19995b482a8SLen Brown return (integer0 << integer1); 20095b482a8SLen Brown 20195b482a8SLen Brown case AML_SHIFT_RIGHT_OP: /* shift_right (Operand, shift_count, Result) */ 20295b482a8SLen Brown 20395b482a8SLen Brown /* 20495b482a8SLen Brown * We need to check if the shiftcount is larger than the integer bit 20595b482a8SLen Brown * width since the behavior of this is not well-defined in the C language. 20695b482a8SLen Brown */ 20795b482a8SLen Brown if (integer1 >= acpi_gbl_integer_bit_width) { 20895b482a8SLen Brown return (0); 20995b482a8SLen Brown } 21095b482a8SLen Brown return (integer0 >> integer1); 21195b482a8SLen Brown 21295b482a8SLen Brown case AML_SUBTRACT_OP: /* Subtract (Integer0, Integer1, Result) */ 21395b482a8SLen Brown 21495b482a8SLen Brown return (integer0 - integer1); 21595b482a8SLen Brown 21695b482a8SLen Brown default: 21795b482a8SLen Brown 21895b482a8SLen Brown return (0); 21995b482a8SLen Brown } 22095b482a8SLen Brown } 22195b482a8SLen Brown 22295b482a8SLen Brown /******************************************************************************* 22395b482a8SLen Brown * 22495b482a8SLen Brown * FUNCTION: acpi_ex_do_logical_numeric_op 22595b482a8SLen Brown * 226ba494beeSBob Moore * PARAMETERS: opcode - AML opcode 227ba494beeSBob Moore * integer0 - Integer operand #0 228ba494beeSBob Moore * integer1 - Integer operand #1 22995b482a8SLen Brown * logical_result - TRUE/FALSE result of the operation 23095b482a8SLen Brown * 23195b482a8SLen Brown * RETURN: Status 23295b482a8SLen Brown * 23395b482a8SLen Brown * DESCRIPTION: Execute a logical "Numeric" AML opcode. For these Numeric 23495b482a8SLen Brown * operators (LAnd and LOr), both operands must be integers. 23595b482a8SLen Brown * 23695b482a8SLen Brown * Note: cleanest machine code seems to be produced by the code 23795b482a8SLen Brown * below, rather than using statements of the form: 23895b482a8SLen Brown * Result = (Integer0 && Integer1); 23995b482a8SLen Brown * 24095b482a8SLen Brown ******************************************************************************/ 24195b482a8SLen Brown 24295b482a8SLen Brown acpi_status 24395b482a8SLen Brown acpi_ex_do_logical_numeric_op(u16 opcode, 2445df7e6cbSBob Moore u64 integer0, u64 integer1, u8 *logical_result) 24595b482a8SLen Brown { 24695b482a8SLen Brown acpi_status status = AE_OK; 24795b482a8SLen Brown u8 local_result = FALSE; 24895b482a8SLen Brown 24995b482a8SLen Brown ACPI_FUNCTION_TRACE(ex_do_logical_numeric_op); 25095b482a8SLen Brown 25195b482a8SLen Brown switch (opcode) { 2529ff5a21aSBob Moore case AML_LOGICAL_AND_OP: /* LAnd (Integer0, Integer1) */ 25395b482a8SLen Brown 25495b482a8SLen Brown if (integer0 && integer1) { 25595b482a8SLen Brown local_result = TRUE; 25695b482a8SLen Brown } 25795b482a8SLen Brown break; 25895b482a8SLen Brown 2599ff5a21aSBob Moore case AML_LOGICAL_OR_OP: /* LOr (Integer0, Integer1) */ 26095b482a8SLen Brown 26195b482a8SLen Brown if (integer0 || integer1) { 26295b482a8SLen Brown local_result = TRUE; 26395b482a8SLen Brown } 26495b482a8SLen Brown break; 26595b482a8SLen Brown 26695b482a8SLen Brown default: 2671d1ea1b7SChao Guan 268*376a588cSBob Moore ACPI_ERROR((AE_INFO, 269*376a588cSBob Moore "Invalid numeric logical opcode: %X", opcode)); 27095b482a8SLen Brown status = AE_AML_INTERNAL; 27195b482a8SLen Brown break; 27295b482a8SLen Brown } 27395b482a8SLen Brown 27495b482a8SLen Brown /* Return the logical result and status */ 27595b482a8SLen Brown 27695b482a8SLen Brown *logical_result = local_result; 27795b482a8SLen Brown return_ACPI_STATUS(status); 27895b482a8SLen Brown } 27995b482a8SLen Brown 28095b482a8SLen Brown /******************************************************************************* 28195b482a8SLen Brown * 28295b482a8SLen Brown * FUNCTION: acpi_ex_do_logical_op 28395b482a8SLen Brown * 284ba494beeSBob Moore * PARAMETERS: opcode - AML opcode 285ba494beeSBob Moore * operand0 - operand #0 286ba494beeSBob Moore * operand1 - operand #1 28795b482a8SLen Brown * logical_result - TRUE/FALSE result of the operation 28895b482a8SLen Brown * 28995b482a8SLen Brown * RETURN: Status 29095b482a8SLen Brown * 29195b482a8SLen Brown * DESCRIPTION: Execute a logical AML opcode. The purpose of having all of the 29295b482a8SLen Brown * functions here is to prevent a lot of pointer dereferencing 29395b482a8SLen Brown * to obtain the operands and to simplify the generation of the 29495b482a8SLen Brown * logical value. For the Numeric operators (LAnd and LOr), both 29595b482a8SLen Brown * operands must be integers. For the other logical operators, 29695b482a8SLen Brown * operands can be any combination of Integer/String/Buffer. The 29795b482a8SLen Brown * first operand determines the type to which the second operand 29895b482a8SLen Brown * will be converted. 29995b482a8SLen Brown * 30095b482a8SLen Brown * Note: cleanest machine code seems to be produced by the code 30195b482a8SLen Brown * below, rather than using statements of the form: 30295b482a8SLen Brown * Result = (Operand0 == Operand1); 30395b482a8SLen Brown * 30495b482a8SLen Brown ******************************************************************************/ 30595b482a8SLen Brown 30695b482a8SLen Brown acpi_status 30795b482a8SLen Brown acpi_ex_do_logical_op(u16 opcode, 30895b482a8SLen Brown union acpi_operand_object *operand0, 30995b482a8SLen Brown union acpi_operand_object *operand1, u8 * logical_result) 31095b482a8SLen Brown { 31195b482a8SLen Brown union acpi_operand_object *local_operand1 = operand1; 3125df7e6cbSBob Moore u64 integer0; 3135df7e6cbSBob Moore u64 integer1; 31495b482a8SLen Brown u32 length0; 31595b482a8SLen Brown u32 length1; 31695b482a8SLen Brown acpi_status status = AE_OK; 31795b482a8SLen Brown u8 local_result = FALSE; 31895b482a8SLen Brown int compare; 31995b482a8SLen Brown 32095b482a8SLen Brown ACPI_FUNCTION_TRACE(ex_do_logical_op); 32195b482a8SLen Brown 32295b482a8SLen Brown /* 32395b482a8SLen Brown * Convert the second operand if necessary. The first operand 32495b482a8SLen Brown * determines the type of the second operand, (See the Data Types 32595b482a8SLen Brown * section of the ACPI 3.0+ specification.) Both object types are 32695b482a8SLen Brown * guaranteed to be either Integer/String/Buffer by the operand 32795b482a8SLen Brown * resolution mechanism. 32895b482a8SLen Brown */ 3293371c19cSBob Moore switch (operand0->common.type) { 33095b482a8SLen Brown case ACPI_TYPE_INTEGER: 3311d1ea1b7SChao Guan 3325ebd2eaaSBob Moore status = acpi_ex_convert_to_integer(operand1, &local_operand1, 3335ebd2eaaSBob Moore ACPI_STRTOUL_BASE16); 33495b482a8SLen Brown break; 33595b482a8SLen Brown 33695b482a8SLen Brown case ACPI_TYPE_STRING: 3371d1ea1b7SChao Guan 3381fad8738SBob Moore status = 3391fad8738SBob Moore acpi_ex_convert_to_string(operand1, &local_operand1, 34095b482a8SLen Brown ACPI_IMPLICIT_CONVERT_HEX); 34195b482a8SLen Brown break; 34295b482a8SLen Brown 34395b482a8SLen Brown case ACPI_TYPE_BUFFER: 3441d1ea1b7SChao Guan 34595b482a8SLen Brown status = acpi_ex_convert_to_buffer(operand1, &local_operand1); 34695b482a8SLen Brown break; 34795b482a8SLen Brown 34895b482a8SLen Brown default: 3491d1ea1b7SChao Guan 350*376a588cSBob Moore ACPI_ERROR((AE_INFO, 351*376a588cSBob Moore "Invalid object type for logical operator: %X", 352*376a588cSBob Moore operand0->common.type)); 35395b482a8SLen Brown status = AE_AML_INTERNAL; 35495b482a8SLen Brown break; 35595b482a8SLen Brown } 35695b482a8SLen Brown 35795b482a8SLen Brown if (ACPI_FAILURE(status)) { 35895b482a8SLen Brown goto cleanup; 35995b482a8SLen Brown } 36095b482a8SLen Brown 36195b482a8SLen Brown /* 36295b482a8SLen Brown * Two cases: 1) Both Integers, 2) Both Strings or Buffers 36395b482a8SLen Brown */ 3643371c19cSBob Moore if (operand0->common.type == ACPI_TYPE_INTEGER) { 36595b482a8SLen Brown /* 36695b482a8SLen Brown * 1) Both operands are of type integer 36795b482a8SLen Brown * Note: local_operand1 may have changed above 36895b482a8SLen Brown */ 36995b482a8SLen Brown integer0 = operand0->integer.value; 37095b482a8SLen Brown integer1 = local_operand1->integer.value; 37195b482a8SLen Brown 37295b482a8SLen Brown switch (opcode) { 3739ff5a21aSBob Moore case AML_LOGICAL_EQUAL_OP: /* LEqual (Operand0, Operand1) */ 37495b482a8SLen Brown 37595b482a8SLen Brown if (integer0 == integer1) { 37695b482a8SLen Brown local_result = TRUE; 37795b482a8SLen Brown } 37895b482a8SLen Brown break; 37995b482a8SLen Brown 3809ff5a21aSBob Moore case AML_LOGICAL_GREATER_OP: /* LGreater (Operand0, Operand1) */ 38195b482a8SLen Brown 38295b482a8SLen Brown if (integer0 > integer1) { 38395b482a8SLen Brown local_result = TRUE; 38495b482a8SLen Brown } 38595b482a8SLen Brown break; 38695b482a8SLen Brown 3879ff5a21aSBob Moore case AML_LOGICAL_LESS_OP: /* LLess (Operand0, Operand1) */ 38895b482a8SLen Brown 38995b482a8SLen Brown if (integer0 < integer1) { 39095b482a8SLen Brown local_result = TRUE; 39195b482a8SLen Brown } 39295b482a8SLen Brown break; 39395b482a8SLen Brown 39495b482a8SLen Brown default: 3951d1ea1b7SChao Guan 396*376a588cSBob Moore ACPI_ERROR((AE_INFO, 397*376a588cSBob Moore "Invalid comparison opcode: %X", opcode)); 39895b482a8SLen Brown status = AE_AML_INTERNAL; 39995b482a8SLen Brown break; 40095b482a8SLen Brown } 40195b482a8SLen Brown } else { 40295b482a8SLen Brown /* 40395b482a8SLen Brown * 2) Both operands are Strings or both are Buffers 40495b482a8SLen Brown * Note: Code below takes advantage of common Buffer/String 40595b482a8SLen Brown * object fields. local_operand1 may have changed above. Use 40695b482a8SLen Brown * memcmp to handle nulls in buffers. 40795b482a8SLen Brown */ 40895b482a8SLen Brown length0 = operand0->buffer.length; 40995b482a8SLen Brown length1 = local_operand1->buffer.length; 41095b482a8SLen Brown 41195b482a8SLen Brown /* Lexicographic compare: compare the data bytes */ 41295b482a8SLen Brown 4134fa4616eSBob Moore compare = memcmp(operand0->buffer.pointer, 41495b482a8SLen Brown local_operand1->buffer.pointer, 41595b482a8SLen Brown (length0 > length1) ? length1 : length0); 41695b482a8SLen Brown 41795b482a8SLen Brown switch (opcode) { 4189ff5a21aSBob Moore case AML_LOGICAL_EQUAL_OP: /* LEqual (Operand0, Operand1) */ 41995b482a8SLen Brown 42095b482a8SLen Brown /* Length and all bytes must be equal */ 42195b482a8SLen Brown 42295b482a8SLen Brown if ((length0 == length1) && (compare == 0)) { 42395b482a8SLen Brown 42495b482a8SLen Brown /* Length and all bytes match ==> TRUE */ 42595b482a8SLen Brown 42695b482a8SLen Brown local_result = TRUE; 42795b482a8SLen Brown } 42895b482a8SLen Brown break; 42995b482a8SLen Brown 4309ff5a21aSBob Moore case AML_LOGICAL_GREATER_OP: /* LGreater (Operand0, Operand1) */ 43195b482a8SLen Brown 43295b482a8SLen Brown if (compare > 0) { 43395b482a8SLen Brown local_result = TRUE; 43495b482a8SLen Brown goto cleanup; /* TRUE */ 43595b482a8SLen Brown } 43695b482a8SLen Brown if (compare < 0) { 43795b482a8SLen Brown goto cleanup; /* FALSE */ 43895b482a8SLen Brown } 43995b482a8SLen Brown 44095b482a8SLen Brown /* Bytes match (to shortest length), compare lengths */ 44195b482a8SLen Brown 44295b482a8SLen Brown if (length0 > length1) { 44395b482a8SLen Brown local_result = TRUE; 44495b482a8SLen Brown } 44595b482a8SLen Brown break; 44695b482a8SLen Brown 4479ff5a21aSBob Moore case AML_LOGICAL_LESS_OP: /* LLess (Operand0, Operand1) */ 44895b482a8SLen Brown 44995b482a8SLen Brown if (compare > 0) { 45095b482a8SLen Brown goto cleanup; /* FALSE */ 45195b482a8SLen Brown } 45295b482a8SLen Brown if (compare < 0) { 45395b482a8SLen Brown local_result = TRUE; 45495b482a8SLen Brown goto cleanup; /* TRUE */ 45595b482a8SLen Brown } 45695b482a8SLen Brown 45795b482a8SLen Brown /* Bytes match (to shortest length), compare lengths */ 45895b482a8SLen Brown 45995b482a8SLen Brown if (length0 < length1) { 46095b482a8SLen Brown local_result = TRUE; 46195b482a8SLen Brown } 46295b482a8SLen Brown break; 46395b482a8SLen Brown 46495b482a8SLen Brown default: 4651d1ea1b7SChao Guan 466*376a588cSBob Moore ACPI_ERROR((AE_INFO, 467*376a588cSBob Moore "Invalid comparison opcode: %X", opcode)); 46895b482a8SLen Brown status = AE_AML_INTERNAL; 46995b482a8SLen Brown break; 47095b482a8SLen Brown } 47195b482a8SLen Brown } 47295b482a8SLen Brown 47395b482a8SLen Brown cleanup: 47495b482a8SLen Brown 47595b482a8SLen Brown /* New object was created if implicit conversion performed - delete */ 47695b482a8SLen Brown 47795b482a8SLen Brown if (local_operand1 != operand1) { 47895b482a8SLen Brown acpi_ut_remove_reference(local_operand1); 47995b482a8SLen Brown } 48095b482a8SLen Brown 48195b482a8SLen Brown /* Return the logical result and status */ 48295b482a8SLen Brown 48395b482a8SLen Brown *logical_result = local_result; 48495b482a8SLen Brown return_ACPI_STATUS(status); 48595b482a8SLen Brown } 486