static BOOLEAN
AcpiDmIsTargetAnOperand (
ACPI_PARSE_OBJECT *Target,
ACPI_PARSE_OBJECT *Operand,
BOOLEAN TopLevel)
{
const ACPI_OPCODE_INFO *OpInfo;
BOOLEAN Same;
/*
* Opcodes must match. Note: ignoring the difference between nameseg
* and namepath for now. May be needed later.
*/
if (Target->Common.AmlOpcode != Operand->Common.AmlOpcode)
{
return (FALSE);
}
/* Nodes should match, even if they are NULL */
if (Target->Common.Node != Operand->Common.Node)
{
return (FALSE);
}
/* Determine if a child exists */
OpInfo = AcpiPsGetOpcodeInfo (Operand->Common.AmlOpcode);
if (OpInfo->Flags & AML_HAS_ARGS)
{
Same = AcpiDmIsTargetAnOperand (Target->Common.Value.Arg,
Operand->Common.Value.Arg, FALSE);
if (!Same)
{
return (FALSE);
}
}
/* Check the next peer, as long as we are not at the top level */
if ((!TopLevel) &&
Target->Common.Next)
{
Same = AcpiDmIsTargetAnOperand (Target->Common.Next,
Operand->Common.Next, FALSE);
if (!Same)
{
return (FALSE);
}
}
/* Supress the duplicate operand at the top-level */
if (TopLevel)
{
Operand->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
}
return (TRUE);
}
BOOLEAN
AcpiDmCheckForSymbolicOpcode (
ACPI_PARSE_OBJECT *Op,
ACPI_OP_WALK_INFO *Info)
{
char *OperatorSymbol = NULL;
ACPI_PARSE_OBJECT *Argument1;
ACPI_PARSE_OBJECT *Argument2;
ACPI_PARSE_OBJECT *Target;
ACPI_PARSE_OBJECT *Target2;
/* Exit immediately if ASL+ not enabled */
if (!AcpiGbl_CstyleDisassembly)
{
return (FALSE);
}
/* Get the first operand */
Argument1 = AcpiPsGetArg (Op, 0);
if (!Argument1)
{
return (FALSE);
}
/* Get the second operand */
Argument2 = Argument1->Common.Next;
/* Setup the operator string for this opcode */
switch (Op->Common.AmlOpcode)
{
case AML_ADD_OP:
OperatorSymbol = " + ";
break;
case AML_SUBTRACT_OP:
OperatorSymbol = " - ";
break;
case AML_MULTIPLY_OP:
OperatorSymbol = " * ";
break;
case AML_DIVIDE_OP:
OperatorSymbol = " / ";
break;
case AML_MOD_OP:
OperatorSymbol = " % ";
break;
case AML_SHIFT_LEFT_OP:
OperatorSymbol = " << ";
break;
case AML_SHIFT_RIGHT_OP:
OperatorSymbol = " >> ";
break;
case AML_BIT_AND_OP:
OperatorSymbol = " & ";
break;
case AML_BIT_OR_OP:
OperatorSymbol = " | ";
break;
case AML_BIT_XOR_OP:
OperatorSymbol = " ^ ";
break;
/* Logical operators, no target */
case AML_LAND_OP:
OperatorSymbol = " && ";
break;
case AML_LEQUAL_OP:
OperatorSymbol = " == ";
break;
case AML_LGREATER_OP:
OperatorSymbol = " > ";
break;
case AML_LLESS_OP:
OperatorSymbol = " < ";
break;
case AML_LOR_OP:
OperatorSymbol = " || ";
break;
case AML_LNOT_OP:
/*
* Check for the LNOT sub-opcodes. These correspond to
* LNotEqual, LLessEqual, and LGreaterEqual. There are
* no actual AML opcodes for these operators.
*/
switch (Argument1->Common.AmlOpcode)
{
case AML_LEQUAL_OP:
OperatorSymbol = " != ";
break;
case AML_LGREATER_OP:
OperatorSymbol = " <= ";
break;
case AML_LLESS_OP:
OperatorSymbol = " >= ";
break;
default:
/* Unary LNOT case, emit "!" immediately */
AcpiOsPrintf ("!");
return (TRUE);
}
Argument1->Common.DisasmOpcode = ACPI_DASM_LNOT_SUFFIX;
Op->Common.DisasmOpcode = ACPI_DASM_LNOT_PREFIX;
/* Save symbol string in the next child (not peer) */
Argument2 = AcpiPsGetArg (Argument1, 0);
if (!Argument2)
{
return (FALSE);
}
Argument2->Common.OperatorSymbol = OperatorSymbol;
return (TRUE);
case AML_INDEX_OP:
/*
* Check for constant source operand. Note: although technically
* legal syntax, the iASL compiler does not support this with
* the symbolic operators for Index(). It doesn't make sense to
* use Index() with a constant anyway.
*/
if ((Argument1->Common.AmlOpcode == AML_STRING_OP) ||
(Argument1->Common.AmlOpcode == AML_BUFFER_OP) ||
(Argument1->Common.AmlOpcode == AML_PACKAGE_OP) ||
(Argument1->Common.AmlOpcode == AML_VAR_PACKAGE_OP))
{
Op->Common.DisasmFlags |= ACPI_PARSEOP_CLOSING_PAREN;
return (FALSE);
}
/* Index operator is [] */
Argument1->Common.OperatorSymbol = " [";
Argument2->Common.OperatorSymbol = "]";
break;
/* Unary operators */
case AML_DECREMENT_OP:
OperatorSymbol = "--";
break;
case AML_INCREMENT_OP:
OperatorSymbol = "++";
break;
case AML_BIT_NOT_OP:
case AML_STORE_OP:
OperatorSymbol = NULL;
break;
default:
return (FALSE);
}
if (Argument1->Common.DisasmOpcode == ACPI_DASM_LNOT_SUFFIX)
{
return (TRUE);
}
/*
* This is the key to how the disassembly of the C-style operators
* works. We save the operator symbol in the first child, thus
* deferring symbol output until after the first operand has been
* emitted.
*/
if (!Argument1->Common.OperatorSymbol)
{
Argument1->Common.OperatorSymbol = OperatorSymbol;
}
/*
* Check for a valid target as the 3rd (or sometimes 2nd) operand
*
* Compound assignment operator support:
* Attempt to optimize constructs of the form:
* Add (Local1, 0xFF, Local1)
* to:
* Local1 += 0xFF
*
* Only the math operators and Store() have a target.
* Logicals have no target.
*/
switch (Op->Common.AmlOpcode)
{
case AML_ADD_OP:
case AML_SUBTRACT_OP:
case AML_MULTIPLY_OP:
case AML_DIVIDE_OP:
case AML_MOD_OP:
case AML_SHIFT_LEFT_OP:
case AML_SHIFT_RIGHT_OP:
case AML_BIT_AND_OP:
case AML_BIT_OR_OP:
case AML_BIT_XOR_OP:
/* Target is 3rd operand */
Target = Argument2->Common.Next;
if (Op->Common.AmlOpcode == AML_DIVIDE_OP)
{
Target2 = Target->Common.Next;
/*
* Divide has an extra target operand (Remainder).
* Default behavior is to simply ignore ASL+ conversion
* if the remainder target (modulo) is specified.
*/
if (!AcpiGbl_DoDisassemblerOptimizations)
{
if (AcpiDmIsValidTarget (Target))
{
Argument1->Common.OperatorSymbol = NULL;
Op->Common.DisasmFlags |= ACPI_PARSEOP_LEGACY_ASL_ONLY;
return (FALSE);
}
Target->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
Target = Target2;
}
else
{
/*
* Divide has an extra target operand (Remainder).
* If both targets are specified, it cannot be converted
* to a C-style operator.
*/
if (AcpiDmIsValidTarget (Target) &&
AcpiDmIsValidTarget (Target2))
{
Argument1->Common.OperatorSymbol = NULL;
Op->Common.DisasmFlags |= ACPI_PARSEOP_LEGACY_ASL_ONLY;
return (FALSE);
}
if (AcpiDmIsValidTarget (Target)) /* Only first Target is valid (remainder) */
{
/* Convert the Divide to Modulo */
Op->Common.AmlOpcode = AML_MOD_OP;
Argument1->Common.OperatorSymbol = " % ";
Target2->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
}
else /* Only second Target (quotient) is valid */
{
Target->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
Target = Target2;
}
}
}
/* Parser should ensure there is at least a placeholder target */
if (!Target)
{
return (FALSE);
}
if (!AcpiDmIsValidTarget (Target))
{
/* Not a valid target (placeholder only, from parser) */
break;
}
/*
* Promote the target up to the first child in the parse
* tree. This is done because the target will be output
* first, in the form:
* <Target> = Operands...
*/
AcpiDmPromoteTarget (Op, Target);
/* Check operands for conversion to a "Compound Assignment" */
switch (Op->Common.AmlOpcode)
{
/* Commutative operators */
case AML_ADD_OP:
case AML_MULTIPLY_OP:
case AML_BIT_AND_OP:
case AML_BIT_OR_OP:
case AML_BIT_XOR_OP:
/*
* For the commutative operators, we can convert to a
* compound statement only if at least one (either) operand
* is the same as the target.
*
* Add (A, B, A) --> A += B
* Add (B, A, A) --> A += B
* Add (B, C, A) --> A = (B + C)
*/
if ((AcpiDmIsTargetAnOperand (Target, Argument1, TRUE)) ||
(AcpiDmIsTargetAnOperand (Target, Argument2, TRUE)))
{
Target->Common.OperatorSymbol =
AcpiDmGetCompoundSymbol (Op->Common.AmlOpcode);
/* Convert operator to compound assignment */
Op->Common.DisasmFlags |= ACPI_PARSEOP_COMPOUND_ASSIGNMENT;
Argument1->Common.OperatorSymbol = NULL;
return (TRUE);
}
break;
/* Non-commutative operators */
case AML_SUBTRACT_OP:
case AML_DIVIDE_OP:
case AML_MOD_OP:
case AML_SHIFT_LEFT_OP:
case AML_SHIFT_RIGHT_OP:
/*
* For the non-commutative operators, we can convert to a
* compound statement only if the target is the same as the
* first operand.
*
* Subtract (A, B, A) --> A -= B
* Subtract (B, A, A) --> A = (B - A)
*/
if ((AcpiDmIsTargetAnOperand (Target, Argument1, TRUE)))
{
Target->Common.OperatorSymbol =
AcpiDmGetCompoundSymbol (Op->Common.AmlOpcode);
/* Convert operator to compound assignment */
Op->Common.DisasmFlags |= ACPI_PARSEOP_COMPOUND_ASSIGNMENT;
Argument1->Common.OperatorSymbol = NULL;
return (TRUE);
}
break;
default:
break;
}
/*
* If we are within a C-style expression, emit an extra open
* paren. Implemented by examining the parent op.
*/
switch (Op->Common.Parent->Common.AmlOpcode)
{
case AML_ADD_OP:
case AML_SUBTRACT_OP:
case AML_MULTIPLY_OP:
case AML_DIVIDE_OP:
case AML_MOD_OP:
case AML_SHIFT_LEFT_OP:
case AML_SHIFT_RIGHT_OP:
case AML_BIT_AND_OP:
case AML_BIT_OR_OP:
case AML_BIT_XOR_OP:
case AML_LAND_OP:
case AML_LEQUAL_OP:
case AML_LGREATER_OP:
case AML_LLESS_OP:
case AML_LOR_OP:
Op->Common.DisasmFlags |= ACPI_PARSEOP_ASSIGNMENT;
AcpiOsPrintf ("(");
break;
default:
break;
}
/* Normal output for ASL/AML operators with a target operand */
Target->Common.OperatorSymbol = " = (";
return (TRUE);
/* Binary operators, no parens */
case AML_DECREMENT_OP:
case AML_INCREMENT_OP:
return (TRUE);
case AML_INDEX_OP:
/* Target is optional, 3rd operand */
Target = Argument2->Common.Next;
if (AcpiDmIsValidTarget (Target))
{
AcpiDmPromoteTarget (Op, Target);
if (!Target->Common.OperatorSymbol)
{
Target->Common.OperatorSymbol = " = ";
}
}
return (TRUE);
case AML_STORE_OP:
/*
* For Store, the Target is the 2nd operand. We know the target
* is valid, because it is not optional.
*
* Ignore any optimizations/folding if flag is set.
* Used for iASL/disassembler test suite only.
*/
if (AcpiDmIsOptimizationIgnored (Op, Argument1))
{
return (FALSE);
}
/*
* Perform conversion.
* In the parse tree, simply swap the target with the
* source so that the target is processed first.
*/
Target = Argument1->Common.Next;
if (!Target)
{
return (FALSE);
}
AcpiDmPromoteTarget (Op, Target);
if (!Target->Common.OperatorSymbol)
{
Target->Common.OperatorSymbol = " = ";
}
return (TRUE);
case AML_BIT_NOT_OP:
/* Target is optional, 2nd operand */
Target = Argument1->Common.Next;
if (!Target)
{
return (FALSE);
}
if (AcpiDmIsValidTarget (Target))
{
/* Valid target, not a placeholder */
AcpiDmPromoteTarget (Op, Target);
Target->Common.OperatorSymbol = " = ~";
}
else
{
/* No target. Emit this prefix operator immediately */
AcpiOsPrintf ("~");
}
return (TRUE);
default:
break;
}
/* All other operators, emit an open paren */
AcpiOsPrintf ("(");
return (TRUE);
}
BOOLEAN
AcpiDmCheckForSymbolicOpcode (
ACPI_PARSE_OBJECT *Op,
ACPI_OP_WALK_INFO *Info)
{
char *OperatorSymbol = NULL;
ACPI_PARSE_OBJECT *Child1;
ACPI_PARSE_OBJECT *Child2;
ACPI_PARSE_OBJECT *Target;
/* Exit immediately if ASL+ not enabled */
if (!AcpiGbl_CstyleDisassembly)
{
return (FALSE);
}
/* Get the first operand */
Child1 = AcpiPsGetArg (Op, 0);
if (!Child1)
{
return (FALSE);
}
/* Get the second operand */
Child2 = Child1->Common.Next;
/* Setup the operator string for this opcode */
switch (Op->Common.AmlOpcode)
{
case AML_ADD_OP:
OperatorSymbol = " + ";
break;
case AML_SUBTRACT_OP:
OperatorSymbol = " - ";
break;
case AML_MULTIPLY_OP:
OperatorSymbol = " * ";
break;
case AML_DIVIDE_OP:
OperatorSymbol = " / ";
break;
case AML_MOD_OP:
OperatorSymbol = " % ";
break;
case AML_SHIFT_LEFT_OP:
OperatorSymbol = " << ";
break;
case AML_SHIFT_RIGHT_OP:
OperatorSymbol = " >> ";
break;
case AML_BIT_AND_OP:
OperatorSymbol = " & ";
break;
case AML_BIT_OR_OP:
OperatorSymbol = " | ";
break;
case AML_BIT_XOR_OP:
OperatorSymbol = " ^ ";
break;
/* Logical operators, no target */
case AML_LAND_OP:
OperatorSymbol = " && ";
break;
case AML_LEQUAL_OP:
OperatorSymbol = " == ";
break;
case AML_LGREATER_OP:
OperatorSymbol = " > ";
break;
case AML_LLESS_OP:
OperatorSymbol = " < ";
break;
case AML_LOR_OP:
OperatorSymbol = " || ";
break;
case AML_LNOT_OP:
/*
* Check for the LNOT sub-opcodes. These correspond to
* LNotEqual, LLessEqual, and LGreaterEqual. There are
* no actual AML opcodes for these operators.
*/
switch (Child1->Common.AmlOpcode)
{
case AML_LEQUAL_OP:
OperatorSymbol = " != ";
break;
case AML_LGREATER_OP:
OperatorSymbol = " <= ";
break;
case AML_LLESS_OP:
OperatorSymbol = " >= ";
break;
default:
/* Unary LNOT case, emit "!" immediately */
AcpiOsPrintf ("!");
return (TRUE);
}
Child1->Common.DisasmOpcode = ACPI_DASM_LNOT_SUFFIX;
Op->Common.DisasmOpcode = ACPI_DASM_LNOT_PREFIX;
/* Save symbol string in the next child (not peer) */
Child2 = AcpiPsGetArg (Child1, 0);
if (!Child2)
{
return (FALSE);
}
Child2->Common.OperatorSymbol = OperatorSymbol;
return (TRUE);
#ifdef INDEX_SUPPORT
case AML_INDEX_OP:
Child1->Common.OperatorSymbol = " [";
Child2->Common.OperatorSymbol = "]";
break;
#endif
/* Unary operators */
case AML_DECREMENT_OP:
OperatorSymbol = "--";
break;
case AML_INCREMENT_OP:
OperatorSymbol = "++";
break;
case AML_BIT_NOT_OP:
case AML_STORE_OP:
OperatorSymbol = NULL;
break;
default:
return (FALSE);
}
if (Child1->Common.DisasmOpcode == ACPI_DASM_LNOT_SUFFIX)
{
return (TRUE);
}
/*
* This is the key to how the disassembly of the C-style operators
* works. We save the operator symbol in the first child, thus
* deferring symbol output until after the first operand has been
* emitted.
*/
if (!Child1->Common.OperatorSymbol)
{
Child1->Common.OperatorSymbol = OperatorSymbol;
}
/*
* Check for a valid target as the 3rd (or sometimes 2nd) operand
*
* Compound assignment operator support:
* Attempt to optimize constructs of the form:
* Add (Local1, 0xFF, Local1)
* to:
* Local1 += 0xFF
*
* Only the math operators and Store() have a target.
* Logicals have no target.
*/
switch (Op->Common.AmlOpcode)
{
case AML_ADD_OP:
case AML_SUBTRACT_OP:
case AML_MULTIPLY_OP:
case AML_DIVIDE_OP:
case AML_MOD_OP:
case AML_SHIFT_LEFT_OP:
case AML_SHIFT_RIGHT_OP:
case AML_BIT_AND_OP:
case AML_BIT_OR_OP:
case AML_BIT_XOR_OP:
/* Target is 3rd operand */
Target = Child2->Common.Next;
if (Op->Common.AmlOpcode == AML_DIVIDE_OP)
{
/*
* Divide has an extra target operand (Remainder).
* If this extra target is specified, it cannot be converted
* to a C-style operator
*/
if (AcpiDmIsValidTarget (Target))
{
Child1->Common.OperatorSymbol = NULL;
return (FALSE);
}
Target->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
Target = Target->Common.Next;
}
/* Parser should ensure there is at least a placeholder target */
if (!Target)
{
return (FALSE);
}
if (!AcpiDmIsValidTarget (Target))
{
/* Not a valid target (placeholder only, from parser) */
break;
}
/*
* Promote the target up to the first child in the parse
* tree. This is done because the target will be output
* first, in the form:
* <Target> = Operands...
*/
AcpiDmPromoteTarget (Op, Target);
/* Check operands for conversion to a "Compound Assignment" */
switch (Op->Common.AmlOpcode)
{
/* Commutative operators */
case AML_ADD_OP:
case AML_MULTIPLY_OP:
case AML_BIT_AND_OP:
case AML_BIT_OR_OP:
case AML_BIT_XOR_OP:
/*
* For the commutative operators, we can convert to a
* compound statement only if at least one (either) operand
* is the same as the target.
*
* Add (A, B, A) --> A += B
* Add (B, A, A) --> A += B
* Add (B, C, A) --> A = (B + C)
*/
if ((AcpiDmIsTargetAnOperand (Target, Child1, TRUE)) ||
(AcpiDmIsTargetAnOperand (Target, Child2, TRUE)))
{
Target->Common.OperatorSymbol =
AcpiDmGetCompoundSymbol (Op->Common.AmlOpcode);
/* Convert operator to compound assignment */
Op->Common.DisasmFlags |= ACPI_PARSEOP_COMPOUND;
Child1->Common.OperatorSymbol = NULL;
return (TRUE);
}
break;
/* Non-commutative operators */
case AML_SUBTRACT_OP:
case AML_DIVIDE_OP:
case AML_MOD_OP:
case AML_SHIFT_LEFT_OP:
case AML_SHIFT_RIGHT_OP:
/*
* For the non-commutative operators, we can convert to a
* compound statement only if the target is the same as the
* first operand.
*
* Subtract (A, B, A) --> A -= B
* Subtract (B, A, A) --> A = (B - A)
*/
if ((AcpiDmIsTargetAnOperand (Target, Child1, TRUE)))
{
Target->Common.OperatorSymbol =
AcpiDmGetCompoundSymbol (Op->Common.AmlOpcode);
/* Convert operator to compound assignment */
Op->Common.DisasmFlags |= ACPI_PARSEOP_COMPOUND;
Child1->Common.OperatorSymbol = NULL;
return (TRUE);
}
break;
default:
break;
}
/*
* If we are within a C-style expression, emit an extra open
* paren. Implemented by examining the parent op.
*/
switch (Op->Common.Parent->Common.AmlOpcode)
{
case AML_ADD_OP:
case AML_SUBTRACT_OP:
case AML_MULTIPLY_OP:
case AML_DIVIDE_OP:
case AML_MOD_OP:
case AML_SHIFT_LEFT_OP:
case AML_SHIFT_RIGHT_OP:
case AML_BIT_AND_OP:
case AML_BIT_OR_OP:
case AML_BIT_XOR_OP:
case AML_LAND_OP:
case AML_LEQUAL_OP:
case AML_LGREATER_OP:
case AML_LLESS_OP:
case AML_LOR_OP:
Op->Common.DisasmFlags |= ACPI_PARSEOP_ASSIGNMENT;
AcpiOsPrintf ("(");
break;
default:
break;
}
/* Normal output for ASL/AML operators with a target operand */
Target->Common.OperatorSymbol = " = (";
return (TRUE);
/* Binary operators, no parens */
case AML_DECREMENT_OP:
case AML_INCREMENT_OP:
return (TRUE);
#ifdef INDEX_SUPPORT
case AML_INDEX_OP:
/* Target is optional, 3rd operand */
Target = Child2->Common.Next;
if (AcpiDmIsValidTarget (Target))
{
AcpiDmPromoteTarget (Op, Target);
if (!Target->Common.OperatorSymbol)
{
Target->Common.OperatorSymbol = " = ";
}
}
return (TRUE);
#endif
case AML_STORE_OP:
/*
* Target is the 2nd operand.
* We know the target is valid, it is not optional.
* In the parse tree, simply swap the target with the
* source so that the target is processed first.
*/
Target = Child1->Common.Next;
if (!Target)
{
return (FALSE);
}
AcpiDmPromoteTarget (Op, Target);
if (!Target->Common.OperatorSymbol)
{
Target->Common.OperatorSymbol = " = ";
}
return (TRUE);
case AML_BIT_NOT_OP:
/* Target is optional, 2nd operand */
Target = Child1->Common.Next;
if (!Target)
{
return (FALSE);
}
if (AcpiDmIsValidTarget (Target))
{
/* Valid target, not a placeholder */
AcpiDmPromoteTarget (Op, Target);
Target->Common.OperatorSymbol = " = ~";
}
else
{
/* No target. Emit this prefix operator immediately */
AcpiOsPrintf ("~");
}
return (TRUE);
default:
break;
}
/* All other operators, emit an open paren */
AcpiOsPrintf ("(");
return (TRUE);
}
