2f88bd3a12
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3737 Apply uncrustify changes to .c/.h files in the MdePkg package Cc: Andrew Fish <afish@apple.com> Cc: Leif Lindholm <leif@nuviainc.com> Cc: Michael D Kinney <michael.d.kinney@intel.com> Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com> Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>
1002 lines
33 KiB
C
1002 lines
33 KiB
C
/** @file
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Bit field functions of BaseLib.
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Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "BaseLibInternals.h"
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/**
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Worker function that returns a bit field from Operand.
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Returns the bitfield specified by the StartBit and the EndBit from Operand.
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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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@param EndBit The ordinal of the most significant bit in the bit field.
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@return The bit field read.
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**/
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UINTN
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EFIAPI
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InternalBaseLibBitFieldReadUint (
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IN UINTN 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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// ~((UINTN)-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 & ~((UINTN)-2 << EndBit)) >> StartBit;
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}
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/**
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Worker function that reads a bit field from Operand, performs a bitwise OR,
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and returns the result.
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Performs a bitwise OR 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 value is returned.
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If OrData is larger than the bitmask value range specified by StartBit and EndBit, 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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@param EndBit The ordinal of the most significant bit in the bit field.
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@param OrData The value to OR with the read value from the value.
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@return The new value.
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**/
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UINTN
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EFIAPI
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InternalBaseLibBitFieldOrUint (
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IN UINTN Operand,
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IN UINTN StartBit,
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IN UINTN EndBit,
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IN UINTN OrData
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)
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{
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//
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// Higher bits in OrData those are not used must be zero.
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//
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// EndBit - StartBit + 1 might be 32 while the result right shifting 32 on a 32bit integer is undefined,
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// So the logic is updated to right shift (EndBit - StartBit) bits and compare the last bit directly.
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//
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ASSERT ((OrData >> (EndBit - StartBit)) == ((OrData >> (EndBit - StartBit)) & 1));
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//
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// ~((UINTN)-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) & ~((UINTN)-2 << EndBit));
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}
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/**
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Worker function that reads a bit field from Operand, performs a bitwise AND,
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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. All other bits in Operand are
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preserved. The new value is returned.
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If AndData is larger than the bitmask value range specified by StartBit and EndBit, 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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@param EndBit The ordinal of the most significant bit in the bit field.
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@param AndData The value to And with the read value from the value.
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@return The new value.
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**/
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UINTN
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EFIAPI
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InternalBaseLibBitFieldAndUint (
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IN UINTN Operand,
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IN UINTN StartBit,
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IN UINTN EndBit,
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IN UINTN AndData
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)
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{
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//
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// Higher bits in AndData those are not used must be zero.
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//
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// EndBit - StartBit + 1 might be 32 while the result right shifting 32 on a 32bit integer is undefined,
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// So the logic is updated to right shift (EndBit - StartBit) bits and compare the last bit directly.
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//
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ASSERT ((AndData >> (EndBit - StartBit)) == ((AndData >> (EndBit - StartBit)) & 1));
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//
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// ~((UINTN)-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) & ~((UINTN)-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 < 8);
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ASSERT (StartBit <= EndBit);
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return (UINT8)InternalBaseLibBitFieldReadUint (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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If Value is larger than the bitmask value range specified by StartBit and EndBit, 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 The 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 < 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 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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If OrData is larger than the bitmask value range specified by StartBit and EndBit, 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 < 8);
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ASSERT (StartBit <= EndBit);
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return (UINT8)InternalBaseLibBitFieldOrUint (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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If AndData is larger than the bitmask value range specified by StartBit and EndBit, 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 < 8);
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ASSERT (StartBit <= EndBit);
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return (UINT8)InternalBaseLibBitFieldAndUint (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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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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If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
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If OrData is larger than the bitmask value range specified by StartBit and EndBit, 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 < 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 < 16);
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ASSERT (StartBit <= EndBit);
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return (UINT16)InternalBaseLibBitFieldReadUint (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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If Value is larger than the bitmask value range specified by StartBit and EndBit, 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 The 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 < 16);
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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 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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If OrData is larger than the bitmask value range specified by StartBit and EndBit, 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 < 16);
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ASSERT (StartBit <= EndBit);
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return (UINT16)InternalBaseLibBitFieldOrUint (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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If AndData is larger than the bitmask value range specified by StartBit and EndBit, 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 < 16);
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ASSERT (StartBit <= EndBit);
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return (UINT16)InternalBaseLibBitFieldAndUint (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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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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|
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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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If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
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If OrData is larger than the bitmask value range specified by StartBit and EndBit, 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 < 16);
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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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|
|
**/
|
|
UINT32
|
|
EFIAPI
|
|
BitFieldRead32 (
|
|
IN UINT32 Operand,
|
|
IN UINTN StartBit,
|
|
IN UINTN EndBit
|
|
)
|
|
{
|
|
ASSERT (EndBit < 32);
|
|
ASSERT (StartBit <= EndBit);
|
|
return (UINT32)InternalBaseLibBitFieldReadUint (Operand, StartBit, EndBit);
|
|
}
|
|
|
|
/**
|
|
Writes a bit field to a 32-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 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().
|
|
If Value is larger than the bitmask value range specified by StartBit and EndBit, 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 Value The new value of the bit field.
|
|
|
|
@return The new 32-bit value.
|
|
|
|
**/
|
|
UINT32
|
|
EFIAPI
|
|
BitFieldWrite32 (
|
|
IN UINT32 Operand,
|
|
IN UINTN StartBit,
|
|
IN UINTN EndBit,
|
|
IN UINT32 Value
|
|
)
|
|
{
|
|
ASSERT (EndBit < 32);
|
|
ASSERT (StartBit <= EndBit);
|
|
return BitFieldAndThenOr32 (Operand, StartBit, EndBit, 0, Value);
|
|
}
|
|
|
|
/**
|
|
Reads a bit field from a 32-bit value, performs a bitwise OR, and returns the
|
|
result.
|
|
|
|
Performs a bitwise 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 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().
|
|
If OrData is larger than the bitmask value range specified by StartBit and EndBit, 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 OrData The value to OR with the read value from the value.
|
|
|
|
@return The new 32-bit value.
|
|
|
|
**/
|
|
UINT32
|
|
EFIAPI
|
|
BitFieldOr32 (
|
|
IN UINT32 Operand,
|
|
IN UINTN StartBit,
|
|
IN UINTN EndBit,
|
|
IN UINT32 OrData
|
|
)
|
|
{
|
|
ASSERT (EndBit < 32);
|
|
ASSERT (StartBit <= EndBit);
|
|
return (UINT32)InternalBaseLibBitFieldOrUint (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().
|
|
If AndData is larger than the bitmask value range specified by StartBit and EndBit, 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 < 32);
|
|
ASSERT (StartBit <= EndBit);
|
|
return (UINT32)InternalBaseLibBitFieldAndUint (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
|
|
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().
|
|
If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
|
|
If OrData is larger than the bitmask value range specified by StartBit and EndBit, 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 < 32);
|
|
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 < 64);
|
|
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().
|
|
If Value is larger than the bitmask value range specified by StartBit and EndBit, 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 The 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 < 64);
|
|
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 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().
|
|
If OrData is larger than the bitmask value range specified by StartBit and EndBit, 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
|
|
)
|
|
{
|
|
UINT64 Value1;
|
|
UINT64 Value2;
|
|
|
|
ASSERT (EndBit < 64);
|
|
ASSERT (StartBit <= EndBit);
|
|
//
|
|
// Higher bits in OrData those are not used must be zero.
|
|
//
|
|
// EndBit - StartBit + 1 might be 64 while the result right shifting 64 on RShiftU64() API is invalid,
|
|
// So the logic is updated to right shift (EndBit - StartBit) bits and compare the last bit directly.
|
|
//
|
|
ASSERT (RShiftU64 (OrData, EndBit - StartBit) == (RShiftU64 (OrData, EndBit - StartBit) & 1));
|
|
|
|
Value1 = LShiftU64 (OrData, StartBit);
|
|
Value2 = LShiftU64 ((UINT64)-2, EndBit);
|
|
|
|
return Operand | (Value1 & ~Value2);
|
|
}
|
|
|
|
/**
|
|
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().
|
|
If AndData is larger than the bitmask value range specified by StartBit and EndBit, 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
|
|
)
|
|
{
|
|
UINT64 Value1;
|
|
UINT64 Value2;
|
|
|
|
ASSERT (EndBit < 64);
|
|
ASSERT (StartBit <= EndBit);
|
|
//
|
|
// Higher bits in AndData those are not used must be zero.
|
|
//
|
|
// EndBit - StartBit + 1 might be 64 while the right shifting 64 on RShiftU64() API is invalid,
|
|
// So the logic is updated to right shift (EndBit - StartBit) bits and compare the last bit directly.
|
|
//
|
|
ASSERT (RShiftU64 (AndData, EndBit - StartBit) == (RShiftU64 (AndData, EndBit - StartBit) & 1));
|
|
|
|
Value1 = LShiftU64 (~AndData, StartBit);
|
|
Value2 = LShiftU64 ((UINT64)-2, EndBit);
|
|
|
|
return Operand & ~(Value1 & ~Value2);
|
|
}
|
|
|
|
/**
|
|
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
|
|
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().
|
|
If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
|
|
If OrData is larger than the bitmask value range specified by StartBit and EndBit, 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 < 64);
|
|
ASSERT (StartBit <= EndBit);
|
|
return BitFieldOr64 (
|
|
BitFieldAnd64 (Operand, StartBit, EndBit, AndData),
|
|
StartBit,
|
|
EndBit,
|
|
OrData
|
|
);
|
|
}
|
|
|
|
/**
|
|
Reads a bit field from a 32-bit value, counts and returns
|
|
the number of set bits.
|
|
|
|
Counts the number of set bits in the bit field specified by
|
|
StartBit and EndBit in Operand. The count is returned.
|
|
|
|
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.
|
|
|
|
@return The number of bits set between StartBit and EndBit.
|
|
|
|
**/
|
|
UINT8
|
|
EFIAPI
|
|
BitFieldCountOnes32 (
|
|
IN UINT32 Operand,
|
|
IN UINTN StartBit,
|
|
IN UINTN EndBit
|
|
)
|
|
{
|
|
UINT32 Count;
|
|
|
|
ASSERT (EndBit < 32);
|
|
ASSERT (StartBit <= EndBit);
|
|
|
|
Count = BitFieldRead32 (Operand, StartBit, EndBit);
|
|
Count -= ((Count >> 1) & 0x55555555);
|
|
Count = (Count & 0x33333333) + ((Count >> 2) & 0x33333333);
|
|
Count += Count >> 4;
|
|
Count &= 0x0F0F0F0F;
|
|
Count += Count >> 8;
|
|
Count += Count >> 16;
|
|
|
|
return (UINT8)Count & 0x3F;
|
|
}
|
|
|
|
/**
|
|
Reads a bit field from a 64-bit value, counts and returns
|
|
the number of set bits.
|
|
|
|
Counts the number of set bits in the bit field specified by
|
|
StartBit and EndBit in Operand. The count is returned.
|
|
|
|
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 number of bits set between StartBit and EndBit.
|
|
|
|
**/
|
|
UINT8
|
|
EFIAPI
|
|
BitFieldCountOnes64 (
|
|
IN UINT64 Operand,
|
|
IN UINTN StartBit,
|
|
IN UINTN EndBit
|
|
)
|
|
{
|
|
UINT64 BitField;
|
|
UINT8 Count;
|
|
|
|
ASSERT (EndBit < 64);
|
|
ASSERT (StartBit <= EndBit);
|
|
|
|
BitField = BitFieldRead64 (Operand, StartBit, EndBit);
|
|
Count = BitFieldCountOnes32 ((UINT32)BitField, 0, 31);
|
|
Count += BitFieldCountOnes32 ((UINT32)RShiftU64 (BitField, 32), 0, 31);
|
|
|
|
return Count;
|
|
}
|