Math64.c File Reference

#include "BaseLibInternals.h"

Go to the source code of this file.

Functions
UINT64 EFIAPI	InternalMathLShiftU64 (IN UINT64 Operand, IN UINTN Count)
UINT64 EFIAPI	InternalMathRShiftU64 (IN UINT64 Operand, IN UINTN Count)
UINT64 EFIAPI	InternalMathARShiftU64 (IN UINT64 Operand, IN UINTN Count)
UINT64 EFIAPI	InternalMathLRotU64 (IN UINT64 Operand, IN UINTN Count)
UINT64 EFIAPI	InternalMathRRotU64 (IN UINT64 Operand, IN UINTN Count)
UINT64 EFIAPI	InternalMathSwapBytes64 (IN UINT64 Operand)
UINT64 EFIAPI	InternalMathMultU64x32 (IN UINT64 Multiplicand, IN UINT32 Multiplier)
UINT64 EFIAPI	InternalMathMultU64x64 (IN UINT64 Multiplicand, IN UINT64 Multiplier)
UINT64 EFIAPI	InternalMathDivU64x32 (IN UINT64 Dividend, IN UINT32 Divisor)
UINT32 EFIAPI	InternalMathModU64x32 (IN UINT64 Dividend, IN UINT32 Divisor)
UINT64 EFIAPI	InternalMathDivRemU64x32 (IN UINT64 Dividend, IN UINT32 Divisor, OUT UINT32 *Remainder OPTIONAL)
UINT64 EFIAPI	InternalMathDivRemU64x64 (IN UINT64 Dividend, IN UINT64 Divisor, OUT UINT64 *Remainder OPTIONAL)
INT64 EFIAPI	InternalMathDivRemS64x64 (IN INT64 Dividend, IN INT64 Divisor, OUT INT64 *Remainder OPTIONAL)

Detailed Description

Leaf math worker functions that require 64-bit arithmetic support from the compiler.

Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file Math64.c.

Function Documentation

InternalMathARShiftU64()

UINT64 EFIAPI InternalMathARShiftU64	(	IN UINT64	Operand,
		IN UINTN	Count
	)

Shifts a 64-bit integer right between 0 and 63 bits. The high bits are filled with original integer's bit 63. The shifted value is returned.

This function shifts the 64-bit value Operand to the right by Count bits. The high Count bits are set to bit 63 of Operand. The shifted value is returned.

Parameters

Operand	The 64-bit operand to shift right.
Count	The number of bits to shift right.

Returns

Operand arithmetically shifted right by Count.

Definition at line 73 of file Math64.c.

InternalMathDivRemS64x64()

INT64 EFIAPI InternalMathDivRemS64x64	(	IN INT64	Dividend,
		IN INT64	Divisor,
		OUT INT64 *Remainder	OPTIONAL
	)

Divides a 64-bit signed integer by a 64-bit signed integer and generates a 64-bit signed result and an optional 64-bit signed remainder.

This function divides the 64-bit signed value Dividend by the 64-bit signed value Divisor and generates a 64-bit signed quotient. If Remainder is not NULL, then the 64-bit signed remainder is returned in Remainder. This function returns the 64-bit signed quotient.

Parameters

Dividend	A 64-bit signed value.
Divisor	A 64-bit signed value.
Remainder	A pointer to a 64-bit signed value. This parameter is optional and may be NULL.

Returns

Dividend / Divisor.

Definition at line 352 of file Math64.c.

InternalMathDivRemU64x32()

UINT64 EFIAPI InternalMathDivRemU64x32	(	IN UINT64	Dividend,
		IN UINT32	Divisor,
		OUT UINT32 *Remainder	OPTIONAL
	)

Divides a 64-bit unsigned integer by a 32-bit unsigned integer and generates a 64-bit unsigned result and an optional 32-bit unsigned remainder.

This function divides the 64-bit unsigned value Dividend by the 32-bit unsigned value Divisor and generates a 64-bit unsigned quotient. If Remainder is not NULL, then the 32-bit unsigned remainder is returned in Remainder. This function returns the 64-bit unsigned quotient.

Parameters

Dividend	A 64-bit unsigned value.
Divisor	A 32-bit unsigned value.
Remainder	A pointer to a 32-bit unsigned value. This parameter is optional and may be NULL.

Returns

Dividend / Divisor.

Definition at line 288 of file Math64.c.

InternalMathDivRemU64x64()

UINT64 EFIAPI InternalMathDivRemU64x64	(	IN UINT64	Dividend,
		IN UINT64	Divisor,
		OUT UINT64 *Remainder	OPTIONAL
	)

Divides a 64-bit unsigned integer by a 64-bit unsigned integer and generates a 64-bit unsigned result and an optional 64-bit unsigned remainder.

This function divides the 64-bit unsigned value Dividend by the 64-bit unsigned value Divisor and generates a 64-bit unsigned quotient. If Remainder is not NULL, then the 64-bit unsigned remainder is returned in Remainder. This function returns the 64-bit unsigned quotient.

Parameters

Dividend	A 64-bit unsigned value.
Divisor	A 64-bit unsigned value.
Remainder	A pointer to a 64-bit unsigned value. This parameter is optional and may be NULL.

Returns

Dividend / Divisor

Definition at line 320 of file Math64.c.

InternalMathDivU64x32()

UINT64 EFIAPI InternalMathDivU64x32	(	IN UINT64	Dividend,
		IN UINT32	Divisor
	)

Divides a 64-bit unsigned integer by a 32-bit unsigned integer and generates a 64-bit unsigned result.

This function divides the 64-bit unsigned value Dividend by the 32-bit unsigned value Divisor and generates a 64-bit unsigned quotient. This function returns the 64-bit unsigned quotient.

Parameters

Dividend	A 64-bit unsigned value.
Divisor	A 32-bit unsigned value.

Returns

Dividend / Divisor.

Definition at line 237 of file Math64.c.

InternalMathLRotU64()

UINT64 EFIAPI InternalMathLRotU64	(	IN UINT64	Operand,
		IN UINTN	Count
	)

Rotates a 64-bit integer left between 0 and 63 bits, filling the low bits with the high bits that were rotated.

This function rotates the 64-bit value Operand to the left by Count bits. The low Count bits are fill with the high Count bits of Operand. The rotated value is returned.

Parameters

Operand	The 64-bit operand to rotate left.
Count	The number of bits to rotate left.

Returns

Operand <<< Count.

Definition at line 114 of file Math64.c.

InternalMathLShiftU64()

UINT64 EFIAPI InternalMathLShiftU64	(	IN UINT64	Operand,
		IN UINTN	Count
	)

Shifts a 64-bit integer left between 0 and 63 bits. The low bits are filled with zeros. The shifted value is returned.

This function shifts the 64-bit value Operand to the left by Count bits. The low Count bits are set to zero. The shifted value is returned.

Parameters

Operand	The 64-bit operand to shift left.
Count	The number of bits to shift left.

Returns

Operand << Count.

Definition at line 27 of file Math64.c.

InternalMathModU64x32()

UINT32 EFIAPI InternalMathModU64x32	(	IN UINT64	Dividend,
		IN UINT32	Divisor
	)

Divides a 64-bit unsigned integer by a 32-bit unsigned integer and generates a 32-bit unsigned remainder.

This function divides the 64-bit unsigned value Dividend by the 32-bit unsigned value Divisor and generates a 32-bit remainder. This function returns the 32-bit unsigned remainder.

Parameters

Dividend	A 64-bit unsigned value.
Divisor	A 32-bit unsigned value.

Returns

Dividend % Divisor.

Definition at line 261 of file Math64.c.

InternalMathMultU64x32()

UINT64 EFIAPI InternalMathMultU64x32	(	IN UINT64	Multiplicand,
		IN UINT32	Multiplier
	)

Multiplies a 64-bit unsigned integer by a 32-bit unsigned integer and generates a 64-bit unsigned result.

This function multiplies the 64-bit unsigned value Multiplicand by the 32-bit unsigned value Multiplier and generates a 64-bit unsigned result. This 64- bit unsigned result is returned.

Parameters

Multiplicand	A 64-bit unsigned value.
Multiplier	A 32-bit unsigned value.

Returns

Multiplicand * Multiplier

Definition at line 189 of file Math64.c.

InternalMathMultU64x64()

UINT64 EFIAPI InternalMathMultU64x64	(	IN UINT64	Multiplicand,
		IN UINT64	Multiplier
	)

Multiplies a 64-bit unsigned integer by a 64-bit unsigned integer and generates a 64-bit unsigned result.

This function multiplies the 64-bit unsigned value Multiplicand by the 64-bit unsigned value Multiplier and generates a 64-bit unsigned result. This 64- bit unsigned result is returned.

Parameters

Multiplicand	A 64-bit unsigned value.
Multiplier	A 64-bit unsigned value.

Returns

Multiplicand * Multiplier.

Definition at line 213 of file Math64.c.

InternalMathRRotU64()

UINT64 EFIAPI InternalMathRRotU64	(	IN UINT64	Operand,
		IN UINTN	Count
	)

Rotates a 64-bit integer right between 0 and 63 bits, filling the high bits with the high low bits that were rotated.

This function rotates the 64-bit value Operand to the right by Count bits. The high Count bits are fill with the low Count bits of Operand. The rotated value is returned.

Parameters

Operand	The 64-bit operand to rotate right.
Count	The number of bits to rotate right.

Returns

Operand >>> Count.

Definition at line 138 of file Math64.c.

InternalMathRShiftU64()

UINT64 EFIAPI InternalMathRShiftU64	(	IN UINT64	Operand,
		IN UINTN	Count
	)

Shifts a 64-bit integer right between 0 and 63 bits. This high bits are filled with zeros. The shifted value is returned.

This function shifts the 64-bit value Operand to the right by Count bits. The high Count bits are set to zero. The shifted value is returned.

Parameters

Operand	The 64-bit operand to shift right.
Count	The number of bits to shift right.

Returns

Operand >> Count.

Definition at line 50 of file Math64.c.

InternalMathSwapBytes64()

UINT64 EFIAPI InternalMathSwapBytes64

(

IN UINT64

Operand

)

Switches the endianess of a 64-bit integer.

This function swaps the bytes in a 64-bit unsigned value to switch the value from little endian to big endian or vice versa. The byte swapped value is returned.

Parameters

Operand

A 64-bit unsigned value.

Returns

The byte swapped Operand.

Definition at line 160 of file Math64.c.