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0ffa12863e
2. Added assert() for AsmFxRestore() in x86LowLevel.c of BaseLib 3. Added assert() for LongJump() in LongJump.c of BaseLib 4. Changed parameter type of Value from "IN" to "IN OUT" for InterLockedComparedExchanged32/64/pointer() functions to sync with MWG-0.55a 5. Changed functions header of all BitField functions of BaseLib, BaseIoLibIntrinsic, BasePciCf8Lib, BasePciExpressLib, BasePciLibCf8, BasePciLibPciExpressLib DxeIoLibCpuIo, PeiIoLibCpuIo etc, to follow MWG-0.55a. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@565 6f19259b-4bc3-4df7-8a09-765794883524
813 lines
27 KiB
C
813 lines
27 KiB
C
/** @file
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Bit field functions of BaseLib.
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Copyright (c) 2006, Intel Corporation<BR>
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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Module Name: BitField.c
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**/
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unsigned int
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EFIAPI
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BitFieldReadUint (
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IN unsigned int Operand,
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IN UINTN StartBit,
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IN UINTN EndBit
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)
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{
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//
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// ~((unsigned int)-2 << EndBit) is a mask in which bit[0] thru bit[EndBit]
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// are 1's while bit[EndBit + 1] thru the most significant bit are 0's.
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//
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return (Operand & ~((unsigned int)-2 << EndBit)) >> StartBit;
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}
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unsigned int
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EFIAPI
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BitFieldOrUint (
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IN unsigned int Operand,
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IN UINTN StartBit,
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IN UINTN EndBit,
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IN unsigned int OrData
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)
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{
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//
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// ~((unsigned int)-2 << EndBit) is a mask in which bit[0] thru bit[EndBit]
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// are 1's while bit[EndBit + 1] thru the most significant bit are 0's.
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//
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return Operand | ((OrData << StartBit) & ~((unsigned int)-2 << EndBit));
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}
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unsigned int
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EFIAPI
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BitFieldAndUint (
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IN unsigned int Operand,
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IN UINTN StartBit,
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IN UINTN EndBit,
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IN unsigned int AndData
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)
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{
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//
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// ~((unsigned int)-2 << EndBit) is a mask in which bit[0] thru bit[EndBit]
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// are 1's while bit[EndBit + 1] thru the most significant bit are 0's.
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//
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return Operand & ~((~AndData << StartBit) & ~((unsigned int)-2 << EndBit));
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}
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/**
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Returns a bit field from an 8-bit value.
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Returns the bitfield specified by the StartBit and the EndBit from Operand.
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If 8-bit operations are not supported, then ASSERT().
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If StartBit is greater than 7, then ASSERT().
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If EndBit is greater than 7, then ASSERT().
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If EndBit is less than StartBit, then ASSERT().
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@param Operand Operand on which to perform the bitfield operation.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..7.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..7.
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@return The bit field read.
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**/
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UINT8
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EFIAPI
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BitFieldRead8 (
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IN UINT8 Operand,
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IN UINTN StartBit,
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IN UINTN EndBit
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)
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{
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ASSERT (EndBit < sizeof (Operand) * 8);
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ASSERT (StartBit <= EndBit);
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return (UINT8)BitFieldReadUint (Operand, StartBit, EndBit);
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}
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/**
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Writes a bit field to an 8-bit value, and returns the result.
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Writes Value to the bit field specified by the StartBit and the EndBit in
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Operand. All other bits in Operand are preserved. The new 8-bit value is
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returned.
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If 8-bit operations are not supported, then ASSERT().
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If StartBit is greater than 7, then ASSERT().
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If EndBit is greater than 7, then ASSERT().
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If EndBit is less than StartBit, then ASSERT().
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@param Operand Operand on which to perform the bitfield operation.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..7.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..7.
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@param Value New value of the bit field.
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@return The new 8-bit value.
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**/
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UINT8
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EFIAPI
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BitFieldWrite8 (
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IN UINT8 Operand,
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IN UINTN StartBit,
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IN UINTN EndBit,
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IN UINT8 Value
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)
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{
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ASSERT (EndBit < sizeof (Operand) * 8);
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ASSERT (StartBit <= EndBit);
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return BitFieldAndThenOr8 (Operand, StartBit, EndBit, 0, Value);
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}
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/**
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Reads a bit field from an 8-bit value, performs a bitwise OR, and returns the
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result.
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Performs a bitwise inclusive OR between the bit field specified by StartBit
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and EndBit in Operand and the value specified by OrData. All other bits in
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Operand are preserved. The new 8-bit value is returned.
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If 8-bit operations are not supported, then ASSERT().
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If StartBit is greater than 7, then ASSERT().
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If EndBit is greater than 7, then ASSERT().
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If EndBit is less than StartBit, then ASSERT().
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@param Operand Operand on which to perform the bitfield operation.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..7.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..7.
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@param OrData The value to OR with the read value from the value
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@return The new 8-bit value.
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**/
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UINT8
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EFIAPI
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BitFieldOr8 (
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IN UINT8 Operand,
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IN UINTN StartBit,
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IN UINTN EndBit,
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IN UINT8 OrData
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)
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{
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ASSERT (EndBit < sizeof (Operand) * 8);
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ASSERT (StartBit <= EndBit);
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return (UINT8)BitFieldOrUint (Operand, StartBit, EndBit, OrData);
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}
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/**
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Reads a bit field from an 8-bit value, performs a bitwise AND, and returns
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the result.
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Performs a bitwise AND between the bit field specified by StartBit and EndBit
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in Operand and the value specified by AndData. All other bits in Operand are
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preserved. The new 8-bit value is returned.
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If 8-bit operations are not supported, then ASSERT().
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If StartBit is greater than 7, then ASSERT().
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If EndBit is greater than 7, then ASSERT().
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If EndBit is less than StartBit, then ASSERT().
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@param Operand Operand on which to perform the bitfield operation.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..7.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..7.
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@param AndData The value to AND with the read value from the value.
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@return The new 8-bit value.
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**/
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UINT8
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EFIAPI
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BitFieldAnd8 (
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IN UINT8 Operand,
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IN UINTN StartBit,
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IN UINTN EndBit,
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IN UINT8 AndData
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)
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{
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ASSERT (EndBit < sizeof (Operand) * 8);
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ASSERT (StartBit <= EndBit);
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return (UINT8)BitFieldAndUint (Operand, StartBit, EndBit, AndData);
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}
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/**
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Reads a bit field from an 8-bit value, performs a bitwise AND followed by a
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bitwise OR, and returns the result.
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Performs a bitwise AND between the bit field specified by StartBit and EndBit
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in Operand and the value specified by AndData, followed by a bitwise
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inclusive OR with value specified by OrData. All other bits in Operand are
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preserved. The new 8-bit value is returned.
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If 8-bit operations are not supported, then ASSERT().
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If StartBit is greater than 7, then ASSERT().
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If EndBit is greater than 7, then ASSERT().
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If EndBit is less than StartBit, then ASSERT().
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@param Operand Operand on which to perform the bitfield operation.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..7.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..7.
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@param AndData The value to AND with the read value from the value.
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@param OrData The value to OR with the result of the AND operation.
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@return The new 8-bit value.
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**/
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UINT8
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EFIAPI
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BitFieldAndThenOr8 (
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IN UINT8 Operand,
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IN UINTN StartBit,
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IN UINTN EndBit,
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IN UINT8 AndData,
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IN UINT8 OrData
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)
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{
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ASSERT (EndBit < sizeof (Operand) * 8);
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ASSERT (StartBit <= EndBit);
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return BitFieldOr8 (
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BitFieldAnd8 (Operand, StartBit, EndBit, AndData),
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StartBit,
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EndBit,
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OrData
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);
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}
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/**
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Returns a bit field from a 16-bit value.
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Returns the bitfield specified by the StartBit and the EndBit from Operand.
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If 16-bit operations are not supported, then ASSERT().
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If StartBit is greater than 15, then ASSERT().
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If EndBit is greater than 15, then ASSERT().
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If EndBit is less than StartBit, then ASSERT().
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@param Operand Operand on which to perform the bitfield operation.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..15.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..15.
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@return The bit field read.
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**/
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UINT16
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EFIAPI
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BitFieldRead16 (
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IN UINT16 Operand,
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IN UINTN StartBit,
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IN UINTN EndBit
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)
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{
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ASSERT (EndBit < sizeof (Operand) * 8);
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ASSERT (StartBit <= EndBit);
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return (UINT16)BitFieldReadUint (Operand, StartBit, EndBit);
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}
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/**
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Writes a bit field to a 16-bit value, and returns the result.
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Writes Value to the bit field specified by the StartBit and the EndBit in
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Operand. All other bits in Operand are preserved. The new 16-bit value is
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returned.
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If 16-bit operations are not supported, then ASSERT().
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If StartBit is greater than 15, then ASSERT().
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If EndBit is greater than 15, then ASSERT().
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If EndBit is less than StartBit, then ASSERT().
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@param Operand Operand on which to perform the bitfield operation.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..15.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..15.
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@param Value New value of the bit field.
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@return The new 16-bit value.
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**/
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UINT16
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EFIAPI
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BitFieldWrite16 (
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IN UINT16 Operand,
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IN UINTN StartBit,
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IN UINTN EndBit,
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IN UINT16 Value
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)
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{
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ASSERT (EndBit < sizeof (Operand) * 8);
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ASSERT (StartBit <= EndBit);
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return BitFieldAndThenOr16 (Operand, StartBit, EndBit, 0, Value);
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}
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/**
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Reads a bit field from a 16-bit value, performs a bitwise OR, and returns the
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result.
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Performs a bitwise inclusive OR between the bit field specified by StartBit
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and EndBit in Operand and the value specified by OrData. All other bits in
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Operand are preserved. The new 16-bit value is returned.
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If 16-bit operations are not supported, then ASSERT().
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If StartBit is greater than 15, then ASSERT().
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If EndBit is greater than 15, then ASSERT().
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If EndBit is less than StartBit, then ASSERT().
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@param Operand Operand on which to perform the bitfield operation.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..15.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..15.
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@param OrData The value to OR with the read value from the value
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@return The new 16-bit value.
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**/
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UINT16
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EFIAPI
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BitFieldOr16 (
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IN UINT16 Operand,
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IN UINTN StartBit,
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IN UINTN EndBit,
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IN UINT16 OrData
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)
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{
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ASSERT (EndBit < sizeof (Operand) * 8);
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ASSERT (StartBit <= EndBit);
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return (UINT16)BitFieldOrUint (Operand, StartBit, EndBit, OrData);
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}
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/**
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Reads a bit field from a 16-bit value, performs a bitwise AND, and returns
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the result.
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Performs a bitwise AND between the bit field specified by StartBit and EndBit
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in Operand and the value specified by AndData. All other bits in Operand are
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preserved. The new 16-bit value is returned.
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If 16-bit operations are not supported, then ASSERT().
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If StartBit is greater than 15, then ASSERT().
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If EndBit is greater than 15, then ASSERT().
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If EndBit is less than StartBit, then ASSERT().
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@param Operand Operand on which to perform the bitfield operation.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..15.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..15.
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@param AndData The value to AND with the read value from the value
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@return The new 16-bit value.
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**/
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UINT16
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EFIAPI
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BitFieldAnd16 (
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IN UINT16 Operand,
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IN UINTN StartBit,
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IN UINTN EndBit,
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IN UINT16 AndData
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)
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{
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ASSERT (EndBit < sizeof (Operand) * 8);
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ASSERT (StartBit <= EndBit);
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return (UINT16)BitFieldAndUint (Operand, StartBit, EndBit, AndData);
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}
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/**
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Reads a bit field from a 16-bit value, performs a bitwise AND followed by a
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bitwise OR, and returns the result.
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Performs a bitwise AND between the bit field specified by StartBit and EndBit
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in Operand and the value specified by AndData, followed by a bitwise
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inclusive OR with value specified by OrData. All other bits in Operand are
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preserved. The new 16-bit value is returned.
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If 16-bit operations are not supported, then ASSERT().
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If StartBit is greater than 15, then ASSERT().
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If EndBit is greater than 15, then ASSERT().
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If EndBit is less than StartBit, then ASSERT().
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@param Operand Operand on which to perform the bitfield operation.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..15.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..15.
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@param AndData The value to AND with the read value from the value.
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@param OrData The value to OR with the result of the AND operation.
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@return The new 16-bit value.
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**/
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UINT16
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EFIAPI
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BitFieldAndThenOr16 (
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IN UINT16 Operand,
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IN UINTN StartBit,
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IN UINTN EndBit,
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IN UINT16 AndData,
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IN UINT16 OrData
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)
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{
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ASSERT (EndBit < sizeof (Operand) * 8);
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ASSERT (StartBit <= EndBit);
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return BitFieldOr16 (
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BitFieldAnd16 (Operand, StartBit, EndBit, AndData),
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StartBit,
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EndBit,
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OrData
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);
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}
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/**
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Returns a bit field from a 32-bit value.
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Returns the bitfield specified by the StartBit and the EndBit from Operand.
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If 32-bit operations are not supported, then ASSERT().
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If StartBit is greater than 31, then ASSERT().
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If EndBit is greater than 31, then ASSERT().
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If EndBit is less than StartBit, then ASSERT().
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@param Operand Operand on which to perform the bitfield operation.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..31.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..31.
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@return The bit field read.
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**/
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UINT32
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EFIAPI
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BitFieldRead32 (
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IN UINT32 Operand,
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IN UINTN StartBit,
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IN UINTN EndBit
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)
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{
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ASSERT (EndBit < sizeof (Operand) * 8);
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ASSERT (StartBit <= EndBit);
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return (UINT32)BitFieldReadUint (Operand, StartBit, EndBit);
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}
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/**
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Writes a bit field to a 32-bit value, and returns the result.
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Writes Value to the bit field specified by the StartBit and the EndBit in
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Operand. All other bits in Operand are preserved. The new 32-bit value is
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returned.
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|
If 32-bit operations are not supported, then ASSERT().
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If StartBit is greater than 31, then ASSERT().
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If EndBit is greater than 31, then ASSERT().
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If EndBit is less than StartBit, then ASSERT().
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|
@param Operand Operand on which to perform the bitfield operation.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..31.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..31.
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@param Value New value of the bit field.
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@return The new 32-bit value.
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**/
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UINT32
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EFIAPI
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BitFieldWrite32 (
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IN UINT32 Operand,
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IN UINTN StartBit,
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IN UINTN EndBit,
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IN UINT32 Value
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)
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{
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ASSERT (EndBit < sizeof (Operand) * 8);
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ASSERT (StartBit <= EndBit);
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return BitFieldAndThenOr32 (Operand, StartBit, EndBit, 0, Value);
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}
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/**
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Reads a bit field from a 32-bit value, performs a bitwise OR, and returns the
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result.
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|
Performs a bitwise inclusive OR between the bit field specified by StartBit
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and EndBit in Operand and the value specified by OrData. All other bits in
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Operand are preserved. The new 32-bit value is returned.
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|
|
|
If 32-bit operations are not supported, then ASSERT().
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|
If StartBit is greater than 31, then ASSERT().
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If EndBit is greater than 31, then ASSERT().
|
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If EndBit is less than StartBit, then ASSERT().
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|
@param Operand Operand on which to perform the bitfield operation.
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@param StartBit The ordinal of the least significant bit in the bit field.
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Range 0..31.
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@param EndBit The ordinal of the most significant bit in the bit field.
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Range 0..31.
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@param OrData The value to OR with the read value from the value
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@return The new 32-bit value.
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**/
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UINT32
|
|
EFIAPI
|
|
BitFieldOr32 (
|
|
IN UINT32 Operand,
|
|
IN UINTN StartBit,
|
|
IN UINTN EndBit,
|
|
IN UINT32 OrData
|
|
)
|
|
{
|
|
ASSERT (EndBit < sizeof (Operand) * 8);
|
|
ASSERT (StartBit <= EndBit);
|
|
return (UINT32)BitFieldOrUint (Operand, StartBit, EndBit, OrData);
|
|
}
|
|
|
|
/**
|
|
Reads a bit field from a 32-bit value, performs a bitwise AND, and returns
|
|
the result.
|
|
|
|
Performs a bitwise AND between the bit field specified by StartBit and EndBit
|
|
in Operand and the value specified by AndData. All other bits in Operand are
|
|
preserved. The new 32-bit value is returned.
|
|
|
|
If 32-bit operations are not supported, then ASSERT().
|
|
If StartBit is greater than 31, then ASSERT().
|
|
If EndBit is greater than 31, then ASSERT().
|
|
If EndBit is less than StartBit, then ASSERT().
|
|
|
|
@param Operand Operand on which to perform the bitfield operation.
|
|
@param StartBit The ordinal of the least significant bit in the bit field.
|
|
Range 0..31.
|
|
@param EndBit The ordinal of the most significant bit in the bit field.
|
|
Range 0..31.
|
|
@param AndData The value to AND with the read value from the value
|
|
|
|
@return The new 32-bit value.
|
|
|
|
**/
|
|
UINT32
|
|
EFIAPI
|
|
BitFieldAnd32 (
|
|
IN UINT32 Operand,
|
|
IN UINTN StartBit,
|
|
IN UINTN EndBit,
|
|
IN UINT32 AndData
|
|
)
|
|
{
|
|
ASSERT (EndBit < sizeof (Operand) * 8);
|
|
ASSERT (StartBit <= EndBit);
|
|
return (UINT32)BitFieldAndUint (Operand, StartBit, EndBit, AndData);
|
|
}
|
|
|
|
/**
|
|
Reads a bit field from a 32-bit value, performs a bitwise AND followed by a
|
|
bitwise OR, and returns the result.
|
|
|
|
Performs a bitwise AND between the bit field specified by StartBit and EndBit
|
|
in Operand and the value specified by AndData, followed by a bitwise
|
|
inclusive OR with value specified by OrData. All other bits in Operand are
|
|
preserved. The new 32-bit value is returned.
|
|
|
|
If 32-bit operations are not supported, then ASSERT().
|
|
If StartBit is greater than 31, then ASSERT().
|
|
If EndBit is greater than 31, then ASSERT().
|
|
If EndBit is less than StartBit, then ASSERT().
|
|
|
|
@param Operand Operand on which to perform the bitfield operation.
|
|
@param StartBit The ordinal of the least significant bit in the bit field.
|
|
Range 0..31.
|
|
@param EndBit The ordinal of the most significant bit in the bit field.
|
|
Range 0..31.
|
|
@param AndData The value to AND with the read value from the value.
|
|
@param OrData The value to OR with the result of the AND operation.
|
|
|
|
@return The new 32-bit value.
|
|
|
|
**/
|
|
UINT32
|
|
EFIAPI
|
|
BitFieldAndThenOr32 (
|
|
IN UINT32 Operand,
|
|
IN UINTN StartBit,
|
|
IN UINTN EndBit,
|
|
IN UINT32 AndData,
|
|
IN UINT32 OrData
|
|
)
|
|
{
|
|
ASSERT (EndBit < sizeof (Operand) * 8);
|
|
ASSERT (StartBit <= EndBit);
|
|
return BitFieldOr32 (
|
|
BitFieldAnd32 (Operand, StartBit, EndBit, AndData),
|
|
StartBit,
|
|
EndBit,
|
|
OrData
|
|
);
|
|
}
|
|
|
|
/**
|
|
Returns a bit field from a 64-bit value.
|
|
|
|
Returns the bitfield specified by the StartBit and the EndBit from Operand.
|
|
|
|
If 64-bit operations are not supported, then ASSERT().
|
|
If StartBit is greater than 63, then ASSERT().
|
|
If EndBit is greater than 63, then ASSERT().
|
|
If EndBit is less than StartBit, then ASSERT().
|
|
|
|
@param Operand Operand on which to perform the bitfield operation.
|
|
@param StartBit The ordinal of the least significant bit in the bit field.
|
|
Range 0..63.
|
|
@param EndBit The ordinal of the most significant bit in the bit field.
|
|
Range 0..63.
|
|
|
|
@return The bit field read.
|
|
|
|
**/
|
|
UINT64
|
|
EFIAPI
|
|
BitFieldRead64 (
|
|
IN UINT64 Operand,
|
|
IN UINTN StartBit,
|
|
IN UINTN EndBit
|
|
)
|
|
{
|
|
ASSERT (EndBit < sizeof (Operand) * 8);
|
|
ASSERT (StartBit <= EndBit);
|
|
return RShiftU64 (Operand & ~LShiftU64 ((UINT64)-2, EndBit), StartBit);
|
|
}
|
|
|
|
/**
|
|
Writes a bit field to a 64-bit value, and returns the result.
|
|
|
|
Writes Value to the bit field specified by the StartBit and the EndBit in
|
|
Operand. All other bits in Operand are preserved. The new 64-bit value is
|
|
returned.
|
|
|
|
If 64-bit operations are not supported, then ASSERT().
|
|
If StartBit is greater than 63, then ASSERT().
|
|
If EndBit is greater than 63, then ASSERT().
|
|
If EndBit is less than StartBit, then ASSERT().
|
|
|
|
@param Operand Operand on which to perform the bitfield operation.
|
|
@param StartBit The ordinal of the least significant bit in the bit field.
|
|
Range 0..63.
|
|
@param EndBit The ordinal of the most significant bit in the bit field.
|
|
Range 0..63.
|
|
@param Value New value of the bit field.
|
|
|
|
@return The new 64-bit value.
|
|
|
|
**/
|
|
UINT64
|
|
EFIAPI
|
|
BitFieldWrite64 (
|
|
IN UINT64 Operand,
|
|
IN UINTN StartBit,
|
|
IN UINTN EndBit,
|
|
IN UINT64 Value
|
|
)
|
|
{
|
|
ASSERT (EndBit < sizeof (Operand) * 8);
|
|
ASSERT (StartBit <= EndBit);
|
|
return BitFieldAndThenOr64 (Operand, StartBit, EndBit, 0, Value);
|
|
}
|
|
|
|
/**
|
|
Reads a bit field from a 64-bit value, performs a bitwise OR, and returns the
|
|
result.
|
|
|
|
Performs a bitwise inclusive OR between the bit field specified by StartBit
|
|
and EndBit in Operand and the value specified by OrData. All other bits in
|
|
Operand are preserved. The new 64-bit value is returned.
|
|
|
|
If 64-bit operations are not supported, then ASSERT().
|
|
If StartBit is greater than 63, then ASSERT().
|
|
If EndBit is greater than 63, then ASSERT().
|
|
If EndBit is less than StartBit, then ASSERT().
|
|
|
|
@param Operand Operand on which to perform the bitfield operation.
|
|
@param StartBit The ordinal of the least significant bit in the bit field.
|
|
Range 0..63.
|
|
@param EndBit The ordinal of the most significant bit in the bit field.
|
|
Range 0..63.
|
|
@param OrData The value to OR with the read value from the value
|
|
|
|
@return The new 64-bit value.
|
|
|
|
**/
|
|
UINT64
|
|
EFIAPI
|
|
BitFieldOr64 (
|
|
IN UINT64 Operand,
|
|
IN UINTN StartBit,
|
|
IN UINTN EndBit,
|
|
IN UINT64 OrData
|
|
)
|
|
{
|
|
ASSERT (EndBit < sizeof (Operand) * 8);
|
|
ASSERT (StartBit <= EndBit);
|
|
return Operand |
|
|
(LShiftU64 (OrData, StartBit) & ~LShiftU64 ((UINT64)-2, EndBit));
|
|
}
|
|
|
|
/**
|
|
Reads a bit field from a 64-bit value, performs a bitwise AND, and returns
|
|
the result.
|
|
|
|
Performs a bitwise AND between the bit field specified by StartBit and EndBit
|
|
in Operand and the value specified by AndData. All other bits in Operand are
|
|
preserved. The new 64-bit value is returned.
|
|
|
|
If 64-bit operations are not supported, then ASSERT().
|
|
If StartBit is greater than 63, then ASSERT().
|
|
If EndBit is greater than 63, then ASSERT().
|
|
If EndBit is less than StartBit, then ASSERT().
|
|
|
|
@param Operand Operand on which to perform the bitfield operation.
|
|
@param StartBit The ordinal of the least significant bit in the bit field.
|
|
Range 0..63.
|
|
@param EndBit The ordinal of the most significant bit in the bit field.
|
|
Range 0..63.
|
|
@param AndData The value to AND with the read value from the value
|
|
|
|
@return The new 64-bit value.
|
|
|
|
**/
|
|
UINT64
|
|
EFIAPI
|
|
BitFieldAnd64 (
|
|
IN UINT64 Operand,
|
|
IN UINTN StartBit,
|
|
IN UINTN EndBit,
|
|
IN UINT64 AndData
|
|
)
|
|
{
|
|
ASSERT (EndBit < sizeof (Operand) * 8);
|
|
ASSERT (StartBit <= EndBit);
|
|
return Operand &
|
|
~(LShiftU64 (~AndData, StartBit) & ~LShiftU64 ((UINT64)-2, EndBit));
|
|
}
|
|
|
|
/**
|
|
Reads a bit field from a 64-bit value, performs a bitwise AND followed by a
|
|
bitwise OR, and returns the result.
|
|
|
|
Performs a bitwise AND between the bit field specified by StartBit and EndBit
|
|
in Operand and the value specified by AndData, followed by a bitwise
|
|
inclusive OR with value specified by OrData. All other bits in Operand are
|
|
preserved. The new 64-bit value is returned.
|
|
|
|
If 64-bit operations are not supported, then ASSERT().
|
|
If StartBit is greater than 63, then ASSERT().
|
|
If EndBit is greater than 63, then ASSERT().
|
|
If EndBit is less than StartBit, then ASSERT().
|
|
|
|
@param Operand Operand on which to perform the bitfield operation.
|
|
@param StartBit The ordinal of the least significant bit in the bit field.
|
|
Range 0..63.
|
|
@param EndBit The ordinal of the most significant bit in the bit field.
|
|
Range 0..63.
|
|
@param AndData The value to AND with the read value from the value.
|
|
@param OrData The value to OR with the result of the AND operation.
|
|
|
|
@return The new 64-bit value.
|
|
|
|
**/
|
|
UINT64
|
|
EFIAPI
|
|
BitFieldAndThenOr64 (
|
|
IN UINT64 Operand,
|
|
IN UINTN StartBit,
|
|
IN UINTN EndBit,
|
|
IN UINT64 AndData,
|
|
IN UINT64 OrData
|
|
)
|
|
{
|
|
ASSERT (EndBit < sizeof (Operand) * 8);
|
|
ASSERT (StartBit <= EndBit);
|
|
return BitFieldOr64 (
|
|
BitFieldAnd64 (Operand, StartBit, EndBit, AndData),
|
|
StartBit,
|
|
EndBit,
|
|
OrData
|
|
);
|
|
}
|