*****************************************************************************/
/*
- * Copyright (C) 2000 - 2004, R. Byron Moore
+ * Copyright (C) 2000 - 2006, R. Byron Moore
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* POSSIBILITY OF SUCH DAMAGES.
*/
-
#include <acpi/acpi.h>
#include <acpi/acinterp.h>
#include <acpi/amlcode.h>
-
+#include <acpi/amlresrc.h>
#define _COMPONENT ACPI_EXECUTER
- ACPI_MODULE_NAME ("exmisc")
-
+ACPI_MODULE_NAME("exmisc")
/*******************************************************************************
*
* Common code for the ref_of_op and the cond_ref_of_op.
*
******************************************************************************/
-
acpi_status
-acpi_ex_get_object_reference (
- union acpi_operand_object *obj_desc,
- union acpi_operand_object **return_desc,
- struct acpi_walk_state *walk_state)
+acpi_ex_get_object_reference(union acpi_operand_object *obj_desc,
+ union acpi_operand_object **return_desc,
+ struct acpi_walk_state *walk_state)
{
- union acpi_operand_object *reference_obj;
- union acpi_operand_object *referenced_obj;
-
-
- ACPI_FUNCTION_TRACE_PTR ("ex_get_object_reference", obj_desc);
+ union acpi_operand_object *reference_obj;
+ union acpi_operand_object *referenced_obj;
+ ACPI_FUNCTION_TRACE_PTR(ex_get_object_reference, obj_desc);
*return_desc = NULL;
- switch (ACPI_GET_DESCRIPTOR_TYPE (obj_desc)) {
+ switch (ACPI_GET_DESCRIPTOR_TYPE(obj_desc)) {
case ACPI_DESC_TYPE_OPERAND:
- if (ACPI_GET_OBJECT_TYPE (obj_desc) != ACPI_TYPE_LOCAL_REFERENCE) {
- return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
+ if (ACPI_GET_OBJECT_TYPE(obj_desc) != ACPI_TYPE_LOCAL_REFERENCE) {
+ return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
}
/*
switch (obj_desc->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 */
default:
- ACPI_REPORT_ERROR (("Unknown Reference subtype in get ref %X\n",
- obj_desc->reference.opcode));
- return_ACPI_STATUS (AE_AML_INTERNAL);
+ ACPI_ERROR((AE_INFO, "Unknown Reference opcode %X",
+ obj_desc->reference.opcode));
+ return_ACPI_STATUS(AE_AML_INTERNAL);
}
break;
-
case ACPI_DESC_TYPE_NAMED:
/*
referenced_obj = obj_desc;
break;
-
default:
- ACPI_REPORT_ERROR (("Invalid descriptor type in get ref: %X\n",
- ACPI_GET_DESCRIPTOR_TYPE (obj_desc)));
- return_ACPI_STATUS (AE_TYPE);
+ ACPI_ERROR((AE_INFO, "Invalid descriptor type %X",
+ ACPI_GET_DESCRIPTOR_TYPE(obj_desc)));
+ return_ACPI_STATUS(AE_TYPE);
}
-
/* Create a new reference object */
- reference_obj = acpi_ut_create_internal_object (ACPI_TYPE_LOCAL_REFERENCE);
+ reference_obj =
+ acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_REFERENCE);
if (!reference_obj) {
- return_ACPI_STATUS (AE_NO_MEMORY);
+ return_ACPI_STATUS(AE_NO_MEMORY);
}
reference_obj->reference.opcode = AML_REF_OF_OP;
reference_obj->reference.object = referenced_obj;
*return_desc = reference_obj;
- ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Object %p Type [%s], returning Reference %p\n",
- obj_desc, acpi_ut_get_object_type_name (obj_desc), *return_desc));
+ ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+ "Object %p Type [%s], returning Reference %p\n",
+ obj_desc, acpi_ut_get_object_type_name(obj_desc),
+ *return_desc));
- return_ACPI_STATUS (AE_OK);
+ return_ACPI_STATUS(AE_OK);
}
-
/*******************************************************************************
*
* FUNCTION: acpi_ex_concat_template
*
- * PARAMETERS: *obj_desc - Object to be converted. Must be an
- * Integer, Buffer, or String
+ * PARAMETERS: Operand0 - First source object
+ * Operand1 - Second source object
+ * actual_return_desc - Where to place the return object
* walk_state - Current walk state
*
* RETURN: Status
******************************************************************************/
acpi_status
-acpi_ex_concat_template (
- union acpi_operand_object *obj_desc1,
- union acpi_operand_object *obj_desc2,
- union acpi_operand_object **actual_return_desc,
- struct acpi_walk_state *walk_state)
+acpi_ex_concat_template(union acpi_operand_object *operand0,
+ union acpi_operand_object *operand1,
+ union acpi_operand_object **actual_return_desc,
+ struct acpi_walk_state *walk_state)
{
- union acpi_operand_object *return_desc;
- u8 *new_buf;
- u8 *end_tag1;
- u8 *end_tag2;
- acpi_size length1;
- acpi_size length2;
+ acpi_status status;
+ union acpi_operand_object *return_desc;
+ u8 *new_buf;
+ u8 *end_tag;
+ acpi_size length0;
+ acpi_size length1;
+ acpi_size new_length;
+
+ ACPI_FUNCTION_TRACE(ex_concat_template);
+
+ /*
+ * Find the end_tag descriptor in each resource template.
+ * Note1: returned pointers point TO the end_tag, not past it.
+ * Note2: zero-length buffers are allowed; treated like one end_tag
+ */
+ /* Get the length of the first resource template */
- ACPI_FUNCTION_TRACE ("ex_concat_template");
+ status = acpi_ut_get_resource_end_tag(operand0, &end_tag);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+ length0 = ACPI_PTR_DIFF(end_tag, operand0->buffer.pointer);
- /* Find the end_tags in each resource template */
+ /* Get the length of the second resource template */
- end_tag1 = acpi_ut_get_resource_end_tag (obj_desc1);
- end_tag2 = acpi_ut_get_resource_end_tag (obj_desc2);
- if (!end_tag1 || !end_tag2) {
- return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
+ status = acpi_ut_get_resource_end_tag(operand1, &end_tag);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
}
- /* Compute the length of each part */
+ length1 = ACPI_PTR_DIFF(end_tag, operand1->buffer.pointer);
+
+ /* Combine both lengths, minimum size will be 2 for end_tag */
- length1 = ACPI_PTR_DIFF (end_tag1, obj_desc1->buffer.pointer);
- length2 = ACPI_PTR_DIFF (end_tag2, obj_desc2->buffer.pointer) +
- 2; /* Size of END_TAG */
+ new_length = length0 + length1 + sizeof(struct aml_resource_end_tag);
- /* Create a new buffer object for the result */
+ /* Create a new buffer object for the result (with one end_tag) */
- return_desc = acpi_ut_create_buffer_object (length1 + length2);
+ return_desc = acpi_ut_create_buffer_object(new_length);
if (!return_desc) {
- return_ACPI_STATUS (AE_NO_MEMORY);
+ return_ACPI_STATUS(AE_NO_MEMORY);
}
- /* Copy the templates to the new descriptor */
-
+ /*
+ * Copy the templates to the new buffer, 0 first, then 1 follows. One
+ * end_tag descriptor is copied from Operand1.
+ */
new_buf = return_desc->buffer.pointer;
- ACPI_MEMCPY (new_buf, obj_desc1->buffer.pointer, length1);
- ACPI_MEMCPY (new_buf + length1, obj_desc2->buffer.pointer, length2);
+ ACPI_MEMCPY(new_buf, operand0->buffer.pointer, length0);
+ ACPI_MEMCPY(new_buf + length0, operand1->buffer.pointer, length1);
- /* Compute the new checksum */
+ /* Insert end_tag and set the checksum to zero, means "ignore checksum" */
- new_buf[return_desc->buffer.length - 1] =
- acpi_ut_generate_checksum (return_desc->buffer.pointer,
- (return_desc->buffer.length - 1));
+ new_buf[new_length - 1] = 0;
+ new_buf[new_length - 2] = ACPI_RESOURCE_NAME_END_TAG | 1;
- /* Return the completed template descriptor */
+ /* Return the completed resource template */
*actual_return_desc = return_desc;
- return_ACPI_STATUS (AE_OK);
+ return_ACPI_STATUS(AE_OK);
}
-
/*******************************************************************************
*
* FUNCTION: acpi_ex_do_concatenate
*
- * PARAMETERS: obj_desc1 - First source object
- * obj_desc2 - Second source object
+ * PARAMETERS: Operand0 - First source object
+ * Operand1 - Second source object
* actual_return_desc - Where to place the return object
* walk_state - Current walk state
*
******************************************************************************/
acpi_status
-acpi_ex_do_concatenate (
- union acpi_operand_object *obj_desc1,
- union acpi_operand_object *obj_desc2,
- union acpi_operand_object **actual_return_desc,
- struct acpi_walk_state *walk_state)
+acpi_ex_do_concatenate(union acpi_operand_object *operand0,
+ union acpi_operand_object *operand1,
+ union acpi_operand_object **actual_return_desc,
+ struct acpi_walk_state *walk_state)
{
- acpi_status status;
- u32 i;
- acpi_integer this_integer;
- union acpi_operand_object *return_desc;
- char *new_buf;
+ union acpi_operand_object *local_operand1 = operand1;
+ union acpi_operand_object *return_desc;
+ char *new_buf;
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(ex_do_concatenate);
+ /*
+ * 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 =
+ acpi_ex_convert_to_integer(operand1, &local_operand1, 16);
+ break;
- ACPI_FUNCTION_ENTRY ();
+ case ACPI_TYPE_STRING:
+ status = acpi_ex_convert_to_string(operand1, &local_operand1,
+ ACPI_IMPLICIT_CONVERT_HEX);
+ break;
+ case ACPI_TYPE_BUFFER:
+ status = acpi_ex_convert_to_buffer(operand1, &local_operand1);
+ 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:
* 2) Two Strings concatenated to produce a new String
* 3) Two Buffers concatenated to produce a new Buffer
*/
- switch (ACPI_GET_OBJECT_TYPE (obj_desc1)) {
+ switch (ACPI_GET_OBJECT_TYPE(operand0)) {
case ACPI_TYPE_INTEGER:
/* Result of two Integers is a Buffer */
/* Need enough buffer space for two integers */
- return_desc = acpi_ut_create_buffer_object (acpi_gbl_integer_byte_width * 2);
+ return_desc = acpi_ut_create_buffer_object((acpi_size)
+ ACPI_MUL_2
+ (acpi_gbl_integer_byte_width));
if (!return_desc) {
- return (AE_NO_MEMORY);
+ status = AE_NO_MEMORY;
+ goto cleanup;
}
- new_buf = (char *) return_desc->buffer.pointer;
+ new_buf = (char *)return_desc->buffer.pointer;
- /* Convert the first integer */
+ /* Copy the first integer, LSB first */
- this_integer = obj_desc1->integer.value;
- for (i = 0; i < acpi_gbl_integer_byte_width; i++) {
- new_buf[i] = (char) this_integer;
- this_integer >>= 8;
- }
+ ACPI_MEMCPY(new_buf, &operand0->integer.value,
+ acpi_gbl_integer_byte_width);
- /* Convert the second integer */
-
- this_integer = obj_desc2->integer.value;
- for (; i < (ACPI_MUL_2 (acpi_gbl_integer_byte_width)); i++) {
- new_buf[i] = (char) this_integer;
- this_integer >>= 8;
- }
+ /* Copy the second integer (LSB first) after the first */
+ ACPI_MEMCPY(new_buf + acpi_gbl_integer_byte_width,
+ &local_operand1->integer.value,
+ acpi_gbl_integer_byte_width);
break;
-
case ACPI_TYPE_STRING:
/* Result of two Strings is a String */
- return_desc = acpi_ut_create_internal_object (ACPI_TYPE_STRING);
+ return_desc = acpi_ut_create_string_object((acpi_size)
+ (operand0->string.
+ length +
+ local_operand1->
+ string.length));
if (!return_desc) {
- return (AE_NO_MEMORY);
- }
-
- /* Operand0 is string */
-
- new_buf = ACPI_MEM_CALLOCATE ((acpi_size) obj_desc1->string.length +
- (acpi_size) obj_desc2->string.length + 1);
- if (!new_buf) {
- ACPI_REPORT_ERROR
- (("ex_do_concatenate: String allocation failure\n"));
status = AE_NO_MEMORY;
goto cleanup;
}
- /* Concatenate the strings */
-
- ACPI_STRCPY (new_buf, obj_desc1->string.pointer);
- ACPI_STRCPY (new_buf + obj_desc1->string.length,
- obj_desc2->string.pointer);
+ new_buf = return_desc->string.pointer;
- /* Complete the String object initialization */
+ /* Concatenate the strings */
- return_desc->string.pointer = new_buf;
- return_desc->string.length = obj_desc1->string.length +
- obj_desc2->string.length;
+ ACPI_STRCPY(new_buf, operand0->string.pointer);
+ ACPI_STRCPY(new_buf + operand0->string.length,
+ local_operand1->string.pointer);
break;
-
case ACPI_TYPE_BUFFER:
/* Result of two Buffers is a Buffer */
- return_desc = acpi_ut_create_buffer_object (
- (acpi_size) obj_desc1->buffer.length +
- (acpi_size) obj_desc2->buffer.length);
+ return_desc = acpi_ut_create_buffer_object((acpi_size)
+ (operand0->buffer.
+ length +
+ local_operand1->
+ buffer.length));
if (!return_desc) {
- return (AE_NO_MEMORY);
+ status = AE_NO_MEMORY;
+ goto cleanup;
}
- new_buf = (char *) return_desc->buffer.pointer;
+ new_buf = (char *)return_desc->buffer.pointer;
/* Concatenate the buffers */
- ACPI_MEMCPY (new_buf, obj_desc1->buffer.pointer,
- obj_desc1->buffer.length);
- ACPI_MEMCPY (new_buf + obj_desc1->buffer.length, obj_desc2->buffer.pointer,
- obj_desc2->buffer.length);
-
+ ACPI_MEMCPY(new_buf, operand0->buffer.pointer,
+ operand0->buffer.length);
+ ACPI_MEMCPY(new_buf + operand0->buffer.length,
+ local_operand1->buffer.pointer,
+ local_operand1->buffer.length);
break;
-
default:
/* Invalid object type, should not happen here */
- ACPI_REPORT_ERROR (("Concat - invalid obj type: %X\n",
- ACPI_GET_OBJECT_TYPE (obj_desc1)));
+ ACPI_ERROR((AE_INFO, "Invalid object type: %X",
+ ACPI_GET_OBJECT_TYPE(operand0)));
status = AE_AML_INTERNAL;
- return_desc = NULL;
+ goto cleanup;
}
*actual_return_desc = return_desc;
- return (AE_OK);
-
-cleanup:
-
- acpi_ut_remove_reference (return_desc);
- return (status);
+ cleanup:
+ if (local_operand1 != operand1) {
+ acpi_ut_remove_reference(local_operand1);
+ }
+ return_ACPI_STATUS(status);
}
-
/*******************************************************************************
*
* FUNCTION: acpi_ex_do_math_op
*
* PARAMETERS: Opcode - AML opcode
- * Operand0 - Integer operand #0
- * Operand1 - Integer operand #1
+ * Integer0 - Integer operand #0
+ * Integer1 - Integer operand #1
*
* RETURN: Integer result of the operation
*
******************************************************************************/
acpi_integer
-acpi_ex_do_math_op (
- u16 opcode,
- acpi_integer operand0,
- acpi_integer operand1)
+acpi_ex_do_math_op(u16 opcode, acpi_integer integer0, acpi_integer integer1)
{
+ ACPI_FUNCTION_ENTRY();
switch (opcode) {
- case AML_ADD_OP: /* Add (Operand0, Operand1, Result) */
+ case AML_ADD_OP: /* Add (Integer0, Integer1, Result) */
- return (operand0 + operand1);
+ return (integer0 + integer1);
+ case AML_BIT_AND_OP: /* And (Integer0, Integer1, Result) */
- case AML_BIT_AND_OP: /* And (Operand0, Operand1, Result) */
+ return (integer0 & integer1);
- return (operand0 & operand1);
+ case AML_BIT_NAND_OP: /* NAnd (Integer0, Integer1, Result) */
+ return (~(integer0 & integer1));
- case AML_BIT_NAND_OP: /* NAnd (Operand0, Operand1, Result) */
+ case AML_BIT_OR_OP: /* Or (Integer0, Integer1, Result) */
- return (~(operand0 & operand1));
+ return (integer0 | integer1);
+ case AML_BIT_NOR_OP: /* NOr (Integer0, Integer1, Result) */
- case AML_BIT_OR_OP: /* Or (Operand0, Operand1, Result) */
+ return (~(integer0 | integer1));
- return (operand0 | operand1);
+ case AML_BIT_XOR_OP: /* XOr (Integer0, Integer1, Result) */
+ return (integer0 ^ integer1);
- case AML_BIT_NOR_OP: /* NOr (Operand0, Operand1, Result) */
+ case AML_MULTIPLY_OP: /* Multiply (Integer0, Integer1, Result) */
- return (~(operand0 | operand1));
+ return (integer0 * integer1);
+ case AML_SHIFT_LEFT_OP: /* shift_left (Operand, shift_count, Result) */
- case AML_BIT_XOR_OP: /* XOr (Operand0, Operand1, 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 >= acpi_gbl_integer_bit_width) {
+ return (0);
+ }
+ return (integer0 << integer1);
- return (operand0 ^ operand1);
+ case AML_SHIFT_RIGHT_OP: /* shift_right (Operand, shift_count, 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 >= acpi_gbl_integer_bit_width) {
+ return (0);
+ }
+ return (integer0 >> integer1);
- case AML_MULTIPLY_OP: /* Multiply (Operand0, Operand1, Result) */
+ case AML_SUBTRACT_OP: /* Subtract (Integer0, Integer1, Result) */
- return (operand0 * operand1);
+ return (integer0 - integer1);
+ default:
- case AML_SHIFT_LEFT_OP: /* shift_left (Operand, shift_count, Result) */
+ return (0);
+ }
+}
- return (operand0 << operand1);
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ex_do_logical_numeric_op
+ *
+ * PARAMETERS: Opcode - AML opcode
+ * Integer0 - Integer operand #0
+ * Integer1 - Integer operand #1
+ * logical_result - 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
+acpi_ex_do_logical_numeric_op(u16 opcode,
+ acpi_integer integer0,
+ acpi_integer integer1, u8 * logical_result)
+{
+ acpi_status status = AE_OK;
+ u8 local_result = FALSE;
- case AML_SHIFT_RIGHT_OP: /* shift_right (Operand, shift_count, Result) */
+ ACPI_FUNCTION_TRACE(ex_do_logical_numeric_op);
- return (operand0 >> operand1);
+ switch (opcode) {
+ case AML_LAND_OP: /* LAnd (Integer0, Integer1) */
+ if (integer0 && integer1) {
+ local_result = TRUE;
+ }
+ break;
- case AML_SUBTRACT_OP: /* Subtract (Operand0, Operand1, Result) */
+ case AML_LOR_OP: /* LOr (Integer0, Integer1) */
- return (operand0 - operand1);
+ if (integer0 || integer1) {
+ local_result = TRUE;
+ }
+ break;
default:
-
- return (0);
+ status = AE_AML_INTERNAL;
+ break;
}
-}
+ /* Return the logical result and status */
+
+ *logical_result = local_result;
+ return_ACPI_STATUS(status);
+}
/*******************************************************************************
*
* FUNCTION: acpi_ex_do_logical_op
*
* PARAMETERS: Opcode - AML opcode
- * Operand0 - Integer operand #0
- * Operand1 - Integer operand #1
+ * Operand0 - operand #0
+ * Operand1 - operand #1
+ * logical_result - TRUE/FALSE result of the operation
*
- * RETURN: 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.
+ * 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:
*
******************************************************************************/
-u8
-acpi_ex_do_logical_op (
- u16 opcode,
- acpi_integer operand0,
- acpi_integer operand1)
+acpi_status
+acpi_ex_do_logical_op(u16 opcode,
+ union acpi_operand_object *operand0,
+ union acpi_operand_object *operand1, u8 * logical_result)
{
+ union acpi_operand_object *local_operand1 = operand1;
+ acpi_integer integer0;
+ acpi_integer integer1;
+ u32 length0;
+ u32 length1;
+ acpi_status status = AE_OK;
+ u8 local_result = FALSE;
+ int compare;
+ ACPI_FUNCTION_TRACE(ex_do_logical_op);
- switch (opcode) {
+ /*
+ * 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 =
+ acpi_ex_convert_to_integer(operand1, &local_operand1, 16);
+ break;
- case AML_LAND_OP: /* LAnd (Operand0, Operand1) */
+ case ACPI_TYPE_STRING:
+ status = acpi_ex_convert_to_string(operand1, &local_operand1,
+ ACPI_IMPLICIT_CONVERT_HEX);
+ break;
- if (operand0 && operand1) {
- return (TRUE);
- }
+ case ACPI_TYPE_BUFFER:
+ status = acpi_ex_convert_to_buffer(operand1, &local_operand1);
break;
+ default:
+ status = AE_AML_INTERNAL;
+ break;
+ }
- case AML_LEQUAL_OP: /* LEqual (Operand0, Operand1) */
+ if (ACPI_FAILURE(status)) {
+ goto cleanup;
+ }
- if (operand0 == operand1) {
- return (TRUE);
- }
- break;
+ /*
+ * 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: local_operand1 may have changed above
+ */
+ integer0 = operand0->integer.value;
+ integer1 = local_operand1->integer.value;
+ switch (opcode) {
+ case AML_LEQUAL_OP: /* LEqual (Operand0, Operand1) */
- case AML_LGREATER_OP: /* LGreater (Operand0, Operand1) */
+ if (integer0 == integer1) {
+ local_result = TRUE;
+ }
+ break;
- if (operand0 > operand1) {
- return (TRUE);
- }
- break;
+ case AML_LGREATER_OP: /* LGreater (Operand0, Operand1) */
+
+ if (integer0 > integer1) {
+ local_result = TRUE;
+ }
+ break;
+ case AML_LLESS_OP: /* LLess (Operand0, Operand1) */
- case AML_LLESS_OP: /* LLess (Operand0, Operand1) */
+ if (integer0 < integer1) {
+ local_result = TRUE;
+ }
+ break;
- if (operand0 < operand1) {
- return (TRUE);
+ default:
+ status = AE_AML_INTERNAL;
+ break;
}
- break;
+ } else {
+ /*
+ * 2) Both operands are Strings or both are Buffers
+ * Note: Code below takes advantage of common Buffer/String
+ * object fields. local_operand1 may have changed above. Use
+ * memcmp to handle nulls in buffers.
+ */
+ length0 = operand0->buffer.length;
+ length1 = local_operand1->buffer.length;
+ /* Lexicographic compare: compare the data bytes */
- case AML_LOR_OP: /* LOr (Operand0, Operand1) */
+ compare = ACPI_MEMCMP(operand0->buffer.pointer,
+ local_operand1->buffer.pointer,
+ (length0 > length1) ? length1 : length0);
- if (operand0 || operand1) {
- return (TRUE);
- }
- break;
+ switch (opcode) {
+ case AML_LEQUAL_OP: /* LEqual (Operand0, Operand1) */
- default:
- break;
+ /* Length and all bytes must be equal */
+
+ if ((length0 == length1) && (compare == 0)) {
+
+ /* Length and all bytes match ==> TRUE */
+
+ local_result = TRUE;
+ }
+ break;
+
+ case AML_LGREATER_OP: /* LGreater (Operand0, Operand1) */
+
+ if (compare > 0) {
+ local_result = TRUE;
+ goto cleanup; /* TRUE */
+ }
+ if (compare < 0) {
+ goto cleanup; /* FALSE */
+ }
+
+ /* Bytes match (to shortest length), compare lengths */
+
+ if (length0 > length1) {
+ local_result = TRUE;
+ }
+ break;
+
+ case AML_LLESS_OP: /* LLess (Operand0, Operand1) */
+
+ if (compare > 0) {
+ goto cleanup; /* FALSE */
+ }
+ if (compare < 0) {
+ local_result = TRUE;
+ goto cleanup; /* TRUE */
+ }
+
+ /* Bytes match (to shortest length), compare lengths */
+
+ if (length0 < length1) {
+ local_result = TRUE;
+ }
+ break;
+
+ default:
+ status = AE_AML_INTERNAL;
+ break;
+ }
}
- return (FALSE);
-}
+ cleanup:
+ /* New object was created if implicit conversion performed - delete */
+ if (local_operand1 != operand1) {
+ acpi_ut_remove_reference(local_operand1);
+ }
+
+ /* Return the logical result and status */
+
+ *logical_result = local_result;
+ return_ACPI_STATUS(status);
+}
git://git.onelab.eu / linux-2.6.git / blobdiff