Added to support X64 port (with SV5 ABI). May be able to remove after we port everything, but Sec, to EFI X64 ABI.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10683 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
andrewfish
368
UnixPkg/Library/UnixBaseLib/Math64.c
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368
UnixPkg/Library/UnixBaseLib/Math64.c
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/** @file
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Leaf math worker functions that require 64-bit arithmetic support from the
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compiler.
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Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
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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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**/
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#include "BaseLibInternals.h"
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/**
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Shifts a 64-bit integer left between 0 and 63 bits. The low bits
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are filled with zeros. The shifted value is returned.
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This function shifts the 64-bit value Operand to the left by Count bits. The
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low Count bits are set to zero. The shifted value is returned.
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@param Operand The 64-bit operand to shift left.
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@param Count The number of bits to shift left.
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@return Operand << Count.
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**/
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UINT64
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EFIAPI
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InternalMathLShiftU64 (
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IN UINT64 Operand,
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IN UINTN Count
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)
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{
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return Operand << Count;
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}
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/**
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Shifts a 64-bit integer right between 0 and 63 bits. This high bits
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are filled with zeros. The shifted value is returned.
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This function shifts the 64-bit value Operand to the right by Count bits. The
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high Count bits are set to zero. The shifted value is returned.
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@param Operand The 64-bit operand to shift right.
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@param Count The number of bits to shift right.
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@return Operand >> Count.
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**/
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UINT64
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EFIAPI
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InternalMathRShiftU64 (
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IN UINT64 Operand,
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IN UINTN Count
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)
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{
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return Operand >> Count;
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}
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/**
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Shifts a 64-bit integer right between 0 and 63 bits. The high bits
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are filled with original integer's bit 63. The shifted value is returned.
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This function shifts the 64-bit value Operand to the right by Count bits. The
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high Count bits are set to bit 63 of Operand. The shifted value is returned.
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@param Operand The 64-bit operand to shift right.
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@param Count The number of bits to shift right.
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@return Operand arithmetically shifted right by Count.
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**/
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UINT64
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EFIAPI
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InternalMathARShiftU64 (
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IN UINT64 Operand,
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IN UINTN Count
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)
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{
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INTN TestValue;
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//
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// Test if this compiler supports arithmetic shift
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//
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TestValue = (((-1) << (sizeof (-1) * 8 - 1)) >> (sizeof (-1) * 8 - 1));
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if (TestValue == -1) {
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//
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// Arithmetic shift is supported
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//
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return (UINT64)((INT64)Operand >> Count);
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}
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//
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// Arithmetic is not supported
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//
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return (Operand >> Count) |
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((INTN)Operand < 0 ? ~((UINTN)-1 >> Count) : 0);
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}
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/**
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Rotates a 64-bit integer left between 0 and 63 bits, filling
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the low bits with the high bits that were rotated.
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This function rotates the 64-bit value Operand to the left by Count bits. The
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low Count bits are fill with the high Count bits of Operand. The rotated
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value is returned.
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@param Operand The 64-bit operand to rotate left.
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@param Count The number of bits to rotate left.
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@return Operand <<< Count.
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**/
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UINT64
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EFIAPI
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InternalMathLRotU64 (
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IN UINT64 Operand,
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IN UINTN Count
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)
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{
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return (Operand << Count) | (Operand >> (64 - Count));
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}
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/**
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Rotates a 64-bit integer right between 0 and 63 bits, filling
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the high bits with the high low bits that were rotated.
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This function rotates the 64-bit value Operand to the right by Count bits.
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The high Count bits are fill with the low Count bits of Operand. The rotated
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value is returned.
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@param Operand The 64-bit operand to rotate right.
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@param Count The number of bits to rotate right.
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@return Operand >>> Count.
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**/
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UINT64
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EFIAPI
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InternalMathRRotU64 (
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IN UINT64 Operand,
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IN UINTN Count
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)
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{
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return (Operand >> Count) | (Operand << (64 - Count));
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}
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/**
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Switches the endianess of a 64-bit integer.
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This function swaps the bytes in a 64-bit unsigned value to switch the value
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from little endian to big endian or vice versa. The byte swapped value is
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returned.
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@param Operand A 64-bit unsigned value.
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@return The byte swapped Operand.
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**/
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UINT64
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EFIAPI
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InternalMathSwapBytes64 (
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IN UINT64 Operand
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)
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{
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UINT64 LowerBytes;
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UINT64 HigherBytes;
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LowerBytes = (UINT64) SwapBytes32 ((UINT32) Operand);
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HigherBytes = (UINT64) SwapBytes32 ((UINT32) (Operand >> 32));
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return (LowerBytes << 32 | HigherBytes);
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}
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/**
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Multiplies a 64-bit unsigned integer by a 32-bit unsigned integer
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and generates a 64-bit unsigned result.
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This function multiplies the 64-bit unsigned value Multiplicand by the 32-bit
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unsigned value Multiplier and generates a 64-bit unsigned result. This 64-
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bit unsigned result is returned.
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@param Multiplicand A 64-bit unsigned value.
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@param Multiplier A 32-bit unsigned value.
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@return Multiplicand * Multiplier
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**/
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UINT64
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EFIAPI
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InternalMathMultU64x32 (
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IN UINT64 Multiplicand,
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IN UINT32 Multiplier
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)
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{
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return Multiplicand * Multiplier;
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}
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/**
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Multiplies a 64-bit unsigned integer by a 64-bit unsigned integer
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and generates a 64-bit unsigned result.
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This function multiplies the 64-bit unsigned value Multiplicand by the 64-bit
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unsigned value Multiplier and generates a 64-bit unsigned result. This 64-
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bit unsigned result is returned.
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@param Multiplicand A 64-bit unsigned value.
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@param Multiplier A 64-bit unsigned value.
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@return Multiplicand * Multiplier.
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**/
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UINT64
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EFIAPI
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InternalMathMultU64x64 (
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IN UINT64 Multiplicand,
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IN UINT64 Multiplier
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)
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{
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return Multiplicand * Multiplier;
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}
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/**
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Divides a 64-bit unsigned integer by a 32-bit unsigned integer and
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generates a 64-bit unsigned result.
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This function divides the 64-bit unsigned value Dividend by the 32-bit
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unsigned value Divisor and generates a 64-bit unsigned quotient. This
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function returns the 64-bit unsigned quotient.
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@param Dividend A 64-bit unsigned value.
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@param Divisor A 32-bit unsigned value.
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@return Dividend / Divisor.
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**/
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UINT64
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EFIAPI
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InternalMathDivU64x32 (
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IN UINT64 Dividend,
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IN UINT32 Divisor
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)
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{
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return Dividend / Divisor;
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}
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/**
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Divides a 64-bit unsigned integer by a 32-bit unsigned integer and
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generates a 32-bit unsigned remainder.
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This function divides the 64-bit unsigned value Dividend by the 32-bit
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unsigned value Divisor and generates a 32-bit remainder. This function
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returns the 32-bit unsigned remainder.
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@param Dividend A 64-bit unsigned value.
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@param Divisor A 32-bit unsigned value.
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@return Dividend % Divisor.
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**/
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UINT32
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EFIAPI
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InternalMathModU64x32 (
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IN UINT64 Dividend,
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IN UINT32 Divisor
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)
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{
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return (UINT32)(Dividend % Divisor);
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}
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/**
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Divides a 64-bit unsigned integer by a 32-bit unsigned integer and
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generates a 64-bit unsigned result and an optional 32-bit unsigned remainder.
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This function divides the 64-bit unsigned value Dividend by the 32-bit
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unsigned value Divisor and generates a 64-bit unsigned quotient. If Remainder
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is not NULL, then the 32-bit unsigned remainder is returned in Remainder.
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This function returns the 64-bit unsigned quotient.
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@param Dividend A 64-bit unsigned value.
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@param Divisor A 32-bit unsigned value.
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@param Remainder A pointer to a 32-bit unsigned value. This parameter is
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optional and may be NULL.
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@return Dividend / Divisor.
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**/
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UINT64
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EFIAPI
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InternalMathDivRemU64x32 (
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IN UINT64 Dividend,
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IN UINT32 Divisor,
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OUT UINT32 *Remainder OPTIONAL
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)
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{
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if (Remainder != NULL) {
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*Remainder = (UINT32)(Dividend % Divisor);
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}
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return Dividend / Divisor;
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}
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/**
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Divides a 64-bit unsigned integer by a 64-bit unsigned integer and
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generates a 64-bit unsigned result and an optional 64-bit unsigned remainder.
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This function divides the 64-bit unsigned value Dividend by the 64-bit
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unsigned value Divisor and generates a 64-bit unsigned quotient. If Remainder
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is not NULL, then the 64-bit unsigned remainder is returned in Remainder.
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This function returns the 64-bit unsigned quotient.
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@param Dividend A 64-bit unsigned value.
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@param Divisor A 64-bit unsigned value.
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@param Remainder A pointer to a 64-bit unsigned value. This parameter is
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optional and may be NULL.
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@return Dividend / Divisor
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**/
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UINT64
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EFIAPI
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InternalMathDivRemU64x64 (
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IN UINT64 Dividend,
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IN UINT64 Divisor,
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OUT UINT64 *Remainder OPTIONAL
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)
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{
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if (Remainder != NULL) {
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*Remainder = Dividend % Divisor;
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}
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return Dividend / Divisor;
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}
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/**
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Divides a 64-bit signed integer by a 64-bit signed integer and
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generates a 64-bit signed result and an optional 64-bit signed remainder.
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This function divides the 64-bit signed value Dividend by the 64-bit
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signed value Divisor and generates a 64-bit signed quotient. If Remainder
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is not NULL, then the 64-bit signed remainder is returned in Remainder.
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This function returns the 64-bit signed quotient.
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@param Dividend A 64-bit signed value.
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@param Divisor A 64-bit signed value.
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@param Remainder A pointer to a 64-bit signed value. This parameter is
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optional and may be NULL.
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@return Dividend / Divisor.
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**/
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INT64
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EFIAPI
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InternalMathDivRemS64x64 (
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IN INT64 Dividend,
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IN INT64 Divisor,
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OUT INT64 *Remainder OPTIONAL
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)
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{
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if (Remainder != NULL) {
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*Remainder = Dividend % Divisor;
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}
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return Dividend / Divisor;
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}
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