uint128.h revision 90eb38579e280c6a0e466177b2a9632ab9eb8c44
/** @file
* IPRT - RTUINT128U & uint128_t methods.
*/
/*
* Copyright (C) 2011 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
#ifndef ___iprt_uint128_h
#define ___iprt_uint128_h
#include <iprt/cdefs.h>
#include <iprt/types.h>
#include <iprt/err.h>
RT_C_DECLS_BEGIN
/** @defgroup grp_rt_once RTUInt128 - 128-bit Unsigned Integer Methods
* @ingroup grp_rt
* @{
*/
/**
* Test if a 128-bit unsigned integer value is zero.
*
* @returns true if they are, false if they aren't.
* @param pValue The input and output value.
*/
DECLINLINE(bool) RTUInt128IsZero(PRTUINT128U pValue)
{
#if ARCH_BITS >= 64
return pValue->s.Hi == 0
&& pValue->s.Lo == 0;
#else
return pValue->DWords.dw0 == 0
&& pValue->DWords.dw1 == 0
&& pValue->DWords.dw2 == 0
&& pValue->DWords.dw3 == 0;
#endif
}
/**
* Set a 128-bit unsigned integer value to zero.
*
* @returns pResult
* @param pResult The result variable.
*/
DECLINLINE(PRTUINT128U) RTUInt128SetZero(PRTUINT128U pResult)
{
#if ARCH_BITS >= 64
pResult->s.Hi = 0;
pResult->s.Lo = 0;
#else
pResult->DWords.dw0 = 0;
pResult->DWords.dw1 = 0;
pResult->DWords.dw2 = 0;
pResult->DWords.dw3 = 0;
#endif
return pResult;
}
/**
* Set a 128-bit unsigned integer value to the maximum value.
*
* @returns pResult
* @param pResult The result variable.
*/
DECLINLINE(PRTUINT128U) RTUInt128SetMax(PRTUINT128U pResult)
{
#if ARCH_BITS >= 64
pResult->s.Hi = UINT64_MAX;
pResult->s.Lo = UINT64_MAX;
#else
pResult->DWords.dw0 = UINT32_MAX;
pResult->DWords.dw1 = UINT32_MAX;
pResult->DWords.dw2 = UINT32_MAX;
pResult->DWords.dw3 = UINT32_MAX;
#endif
return pResult;
}
RTDECL(PRTUINT128U) RTUInt128Add(PRTUINT128U pResult, PCRTUINT128U pValue1, PCRTUINT128U pValue2);
RTDECL(PRTUINT128U) RTUInt128Sub(PRTUINT128U pResult, PCRTUINT128U pValue1, PCRTUINT128U pValue2);
RTDECL(PRTUINT128U) RTUInt128Div(PRTUINT128U pResult, PCRTUINT128U pValue1, PCRTUINT128U pValue2);
RTDECL(PRTUINT128U) RTUInt128Mod(PRTUINT128U pResult, PCRTUINT128U pValue1, PCRTUINT128U pValue2);
RTDECL(PRTUINT128U) RTUInt128And(PRTUINT128U pResult, PCRTUINT128U pValue1, PCRTUINT128U pValue2);
RTDECL(PRTUINT128U) RTUInt128Or( PRTUINT128U pResult, PCRTUINT128U pValue1, PCRTUINT128U pValue2);
RTDECL(PRTUINT128U) RTUInt128Xor(PRTUINT128U pResult, PCRTUINT128U pValue1, PCRTUINT128U pValue2);
RTDECL(PRTUINT128U) RTUInt128ShiftLeft( PRTUINT128U pResult, PCRTUINT128U pValue, int cBits);
RTDECL(PRTUINT128U) RTUInt128ShiftRight(PRTUINT128U pResult, PCRTUINT128U pValue, int cBits);
RTDECL(PRTUINT128U) RTUInt128BooleanNot(PRTUINT128U pResult, PCRTUINT128U pValue);
RTDECL(PRTUINT128U) RTUInt128BitwiseNot(PRTUINT128U pResult, PCRTUINT128U pValue);
/**
* Assigns one 128-bit unsigned integer value to another.
*
* @returns pResult
* @param pResult The result variable.
* @param pValue The value to assign.
*/
DECLINLINE(PRTUINT128U) RTUInt128Assign(PRTUINT128U pResult, PCRTUINT128U pValue)
{
#if ARCH_BITS >= 64
pResult->s.Hi = pValue->s.Hi;
pResult->s.Lo = pValue->s.Lo;
#else
pResult->DWords.dw0 = pValue->DWords.dw0;
pResult->DWords.dw1 = pValue->DWords.dw1;
pResult->DWords.dw2 = pValue->DWords.dw2;
pResult->DWords.dw3 = pValue->DWords.dw3;
#endif
return pResult;
}
/**
* Assigns a boolean value to 128-bit unsigned integer.
*
* @returns pResult
* @param pResult The result variable.
* @param fValue The boolean value.
*/
DECLINLINE(PRTUINT128U) RTUInt128AssignBoolean(PRTUINT128U pValueResult, bool fValue)
{
#if ARCH_BITS >= 64
pValueResult->s.Lo = fValue;
pValueResult->s.Hi = 0;
#else
pValueResult->DWords.dw0 = fValue;
pValueResult->DWords.dw1 = 0;
pValueResult->DWords.dw2 = 0;
pValueResult->DWords.dw3 = 0;
#endif
return pValueResult;
}
/**
* Assigns a 8-bit unsigned integer value to 128-bit unsigned integer.
*
* @returns pResult
* @param pResult The result variable.
* @param u8Value The 8-bit unsigned integer value.
*/
DECLINLINE(PRTUINT128U) RTUInt128AssignU8(PRTUINT128U pValueResult, uint8_t u8Value)
{
#if ARCH_BITS >= 64
pValueResult->s.Lo = u8Value;
pValueResult->s.Hi = 0;
#else
pValueResult->DWords.dw0 = u8Value;
pValueResult->DWords.dw1 = 0;
pValueResult->DWords.dw2 = 0;
pValueResult->DWords.dw3 = 0;
#endif
return pValueResult;
}
/**
* Assigns a 16-bit unsigned integer value to 128-bit unsigned integer.
*
* @returns pResult
* @param pResult The result variable.
* @param u16Value The 16-bit unsigned integer value.
*/
DECLINLINE(PRTUINT128U) RTUInt128AssignU16(PRTUINT128U pValueResult, uint16_t u16Value)
{
#if ARCH_BITS >= 64
pValueResult->s.Lo = u16Value;
pValueResult->s.Hi = 0;
#else
pValueResult->DWords.dw0 = u16Value;
pValueResult->DWords.dw1 = 0;
pValueResult->DWords.dw2 = 0;
pValueResult->DWords.dw3 = 0;
#endif
return pValueResult;
}
/**
* Assigns a 16-bit unsigned integer value to 128-bit unsigned integer.
*
* @returns pResult
* @param pResult The result variable.
* @param u32Value The 32-bit unsigned integer value.
*/
DECLINLINE(PRTUINT128U) RTUInt128AssignU32(PRTUINT128U pValueResult, uint32_t u32Value)
{
#if ARCH_BITS >= 64
pValueResult->s.Lo = u32Value;
pValueResult->s.Hi = 0;
#else
pValueResult->DWords.dw0 = u32Value;
pValueResult->DWords.dw1 = 0;
pValueResult->DWords.dw2 = 0;
pValueResult->DWords.dw3 = 0;
#endif
return pValueResult;
}
/**
* Assigns a 64-bit unsigned integer value to 128-bit unsigned integer.
*
* @returns pResult
* @param pResult The result variable.
* @param u32Value The 32-bit unsigned integer value.
*/
DECLINLINE(PRTUINT128U) RTUInt128AssignU64(PRTUINT128U pValueResult, uint64_t u64Value)
{
pValueResult->s.Lo = u64Value;
pValueResult->s.Hi = 0;
return pValueResult;
}
RTDECL(PRTUINT128U) RTUInt128AssignAdd(PRTUINT128U pValue1Result, PCRTUINT128U pValue2);
RTDECL(PRTUINT128U) RTUInt128AssignSub(PRTUINT128U pValue1Result, PCRTUINT128U pValue2);
RTDECL(PRTUINT128U) RTUInt128AssignDiv(PRTUINT128U pValue1Result, PCRTUINT128U pValue2);
RTDECL(PRTUINT128U) RTUInt128AssignMod(PRTUINT128U pValue1Result, PCRTUINT128U pValue2);
/**
* Performs a bitwise AND of two 128-bit unsigned integer values and assigned
* the result to the first one.
*
* @returns pValue1Result.
* @param pValue1Result The first value and result.
* @param pValue2 The second value.
*/
DECLINLINE(PRTUINT128U) RTUInt128AssignAnd(PRTUINT128U pValue1Result, PCRTUINT128U pValue2)
{
#if ARCH_BITS >= 64
pValue1Result->s.Hi &= pValue2->s.Hi;
pValue1Result->s.Lo &= pValue2->s.Lo;
#else
pValue1Result->DWords.dw0 &= pValue2->DWords.dw0;
pValue1Result->DWords.dw1 &= pValue2->DWords.dw1;
pValue1Result->DWords.dw2 &= pValue2->DWords.dw2;
pValue1Result->DWords.dw3 &= pValue2->DWords.dw3;
#endif
return pValue1Result;
}
/**
* Performs a bitwise AND of a 128-bit unsigned integer value and a mask made
* up of the first N bits, assigning the result to the the 128-bit value.
*
* @returns pValueResult.
* @param pValueResult The value and result.
* @param cBits The number of bits to AND (counting from the first
* bit).
*/
DECLINLINE(PRTUINT128U) RTUInt128AssignAndNFirstBits(PRTUINT128U pValueResult, unsigned cBits)
{
if (cBits <= 64)
{
if (cBits != 64)
pValueResult->s.Lo &= (RT_BIT_64(cBits) - 1);
pValueResult->s.Hi = 0;
}
else if (cBits < 128)
pValueResult->s.Hi &= (RT_BIT_64(cBits - 64) - 1);
/** @todo #if ARCH_BITS >= 64 */
return pValueResult;
}
/**
* Performs a bitwise OR of two 128-bit unsigned integer values and assigned
* the result to the first one.
*
* @returns pValue1Result.
* @param pValue1Result The first value and result.
* @param pValue2 The second value.
*/
DECLINLINE(PRTUINT128U) RTUInt128AssignOr(PRTUINT128U pValue1Result, PCRTUINT128U pValue2)
{
#if ARCH_BITS >= 64
pValue1Result->s.Hi |= pValue2->s.Hi;
pValue1Result->s.Lo |= pValue2->s.Lo;
#else
pValue1Result->DWords.dw0 |= pValue2->DWords.dw0;
pValue1Result->DWords.dw1 |= pValue2->DWords.dw1;
pValue1Result->DWords.dw2 |= pValue2->DWords.dw2;
pValue1Result->DWords.dw3 |= pValue2->DWords.dw3;
#endif
return pValue1Result;
}
/**
* Performs a bitwise XOR of two 128-bit unsigned integer values and assigned
* the result to the first one.
*
* @returns pValue1Result.
* @param pValue1Result The first value and result.
* @param pValue2 The second value.
*/
DECLINLINE(PRTUINT128U) RTUInt128AssignXor(PRTUINT128U pValue1Result, PCRTUINT128U pValue2)
{
#if ARCH_BITS >= 64
pValue1Result->s.Hi ^= pValue2->s.Hi;
pValue1Result->s.Lo ^= pValue2->s.Lo;
#else
pValue1Result->DWords.dw0 ^= pValue2->DWords.dw0;
pValue1Result->DWords.dw1 ^= pValue2->DWords.dw1;
pValue1Result->DWords.dw2 ^= pValue2->DWords.dw2;
pValue1Result->DWords.dw3 ^= pValue2->DWords.dw3;
#endif
return pValue1Result;
}
/**
* Performs a bitwise left shift on a 128-bit unsigned integer value, assigning
* the result to it.
*
* @returns pValue1Result.
* @param pValue1Result The first value and result.
* @param cBits The number of bits to shift.
*/
DECLINLINE(PRTUINT128U) RTUInt128AssignShiftLeft(PRTUINT128U pValueResult, int cBits)
{
RTUINT128U const InVal = *pValueResult;
/** @todo #if ARCH_BITS >= 64 */
if (cBits > 0)
{
/* (left shift) */
if (cBits >= 128)
RTUInt128SetZero(pValueResult);
else if (cBits >= 64)
{
pValueResult->s.Lo = 0;
pValueResult->s.Hi = InVal.s.Lo << (cBits - 64);
}
else
{
pValueResult->s.Hi = InVal.s.Hi << cBits;
pValueResult->s.Hi |= InVal.s.Lo >> (64 - cBits);
pValueResult->s.Lo = InVal.s.Lo << cBits;
}
}
else if (cBits < 0)
{
/* (right shift) */
cBits = -cBits;
if (cBits >= 128)
RTUInt128SetZero(pValueResult);
else if (cBits >= 64)
{
pValueResult->s.Hi = 0;
pValueResult->s.Lo = InVal.s.Hi >> (cBits - 64);
}
else
{
pValueResult->s.Lo = InVal.s.Lo >> cBits;
pValueResult->s.Lo |= InVal.s.Hi << (64 - cBits);
pValueResult->s.Hi = InVal.s.Hi >> cBits;
}
}
return pValueResult;
}
/**
* Performs a bitwise left shift on a 128-bit unsigned integer value, assigning
* the result to it.
*
* @returns pValue1Result.
* @param pValue1Result The first value and result.
* @param cBits The number of bits to shift.
*/
DECLINLINE(PRTUINT128U) RTUInt128AssignShiftRight(PRTUINT128U pValueResult, int cBits)
{
return RTUInt128AssignShiftLeft(pValueResult, -cBits);
}
/**
* Performs a bitwise NOT on a 128-bit unsigned integer value, assigning the
* result to it.
*
* @returns pValueResult
* @param pValueResult The value and result.
*/
DECLINLINE(PRTUINT128U) RTUInt128AssignBitwiseNot(PRTUINT128U pValueResult)
{
#if ARCH_BITS >= 64
pValueResult->s.Hi = ~pValueResult->s.Hi;
pValueResult->s.Lo = ~pValueResult->s.Lo;
#else
pValueResult->DWords.dw0 = ~pValueResult->DWords.dw0;
pValueResult->DWords.dw1 = ~pValueResult->DWords.dw1;
pValueResult->DWords.dw2 = ~pValueResult->DWords.dw2;
pValueResult->DWords.dw3 = ~pValueResult->DWords.dw3;
#endif
return pValueResult;
}
/**
* Performs a boolean NOT on a 128-bit unsigned integer value, assigning the
* result to it.
*
* @returns pValueResult
* @param pValueResult The value and result.
*/
DECLINLINE(PRTUINT128U) RTUInt128AssignBooleanNot(PRTUINT128U pValueResult)
{
return RTUInt128AssignBoolean(pValueResult, RTUInt128IsZero(pValueResult));
}
/**
* Compares two 128-bit unsigned integer values.
*
* @retval 0 if equal.
* @retval -1 if the first value is smaller than the second.
* @retval 1 if the first value is larger than the second.
*
* @param pValue1 The first value.
* @param pValue2 The second value.
*/
DECLINLINE(bool) RTUInt128Compare(PCRTUINT128U pValue1, PCRTUINT128U pValue2)
{
#if ARCH_BITS >= 64
if (pValue1->s.Hi != pValue2->s.Hi)
return pValue1->s.Hi > pValue2->s.Hi ? 1 : -1;
if (pValue1->s.Lo != pValue2->s.Lo)
return pValue1->s.Lo > pValue2->s.Lo ? 1 : -1;
return 0;
#else
if (pValue1->DWords.dw0 != pValue2->DWords.dw0)
return pValue1->DWords.dw0 > pValue2->DWords.dw0 ? 1 : -1;
if (pValue1->DWords.dw1 != pValue2->DWords.dw1)
return pValue1->DWords.dw1 > pValue2->DWords.dw1 ? 1 : -1;
if (pValue1->DWords.dw2 != pValue2->DWords.dw2)
return pValue1->DWords.dw2 > pValue2->DWords.dw2 ? 1 : -1;
if (pValue1->DWords.dw3 != pValue2->DWords.dw3)
return pValue1->DWords.dw3 > pValue2->DWords.dw3 ? 1 : -1;
return 0;
#endif
}
/**
* Tests if two 128-bit unsigned integer values not equal.
*
* @returns true if equal, false if not equal.
* @param pValue1 The first value.
* @param pValue2 The second value.
*/
DECLINLINE(bool) RTUInt128IsEqual(PCRTUINT128U pValue1, PCRTUINT128U pValue2)
{
#if ARCH_BITS >= 64
return pValue1->s.Hi == pValue2->s.Hi
&& pValue1->s.Lo == pValue2->s.Lo;
#else
return pValue1->DWords.dw0 == pValue2->DWords.dw0
&& pValue1->DWords.dw1 == pValue2->DWords.dw1
&& pValue1->DWords.dw2 == pValue2->DWords.dw2
&& pValue1->DWords.dw3 == pValue2->DWords.dw3;
#endif
}
/**
* Tests if two 128-bit unsigned integer values are not equal.
*
* @returns true if not equal, false if equal.
* @param pValue1 The first value.
* @param pValue2 The second value.
*/
DECLINLINE(bool) RTUInt128IsNotEqual(PCRTUINT128U pValue1, PCRTUINT128U pValue2)
{
return !RTUInt128IsEqual(pValue1, pValue2);
}
/**
* Sets a bit in a 128-bit unsigned integer type.
*
* @returns pValueResult.
* @param pValueResult The input and output value.
* @param iBit The bit to set.
*/
DECLINLINE(PRTUINT128U) RTUInt128BitSet(PRTUINT128U pValueResult, unsigned iBit)
{
if (iBit < 64)
{
#if ARCH_BITS >= 64
pValueResult->s.Lo |= RT_BIT_64(iBit);
#else
if (iBit < 32)
pValueResult->DWords.dw0 |= RT_BIT_32(iBit);
else
pValueResult->DWords.dw1 |= RT_BIT_32(iBit - 32);
#endif
}
else if (iBit < 128)
{
#if ARCH_BITS >= 64
pValueResult->s.Hi |= RT_BIT_64(iBit - 64);
#else
if (iBit < 96)
pValueResult->DWords.dw2 |= RT_BIT_32(iBit - 64);
else
pValueResult->DWords.dw3 |= RT_BIT_32(iBit - 96);
#endif
}
return pValueResult;
}
/**
* Sets a bit in a 128-bit unsigned integer type.
*
* @returns pValueResult.
* @param pValueResult The input and output value.
* @param iBit The bit to set.
*/
DECLINLINE(PRTUINT128U) RTUInt128BitClear(PRTUINT128U pValueResult, unsigned iBit)
{
if (iBit < 64)
{
#if ARCH_BITS >= 64
pValueResult->s.Lo &= ~RT_BIT_64(iBit);
#else
if (iBit < 32)
pValueResult->DWords.dw0 &= ~RT_BIT_32(iBit);
else
pValueResult->DWords.dw1 &= ~RT_BIT_32(iBit - 32);
#endif
}
else if (iBit < 128)
{
#if ARCH_BITS >= 64
pValueResult->s.Hi &= ~RT_BIT_64(iBit - 64);
#else
if (iBit < 96)
pValueResult->DWords.dw2 &= ~RT_BIT_32(iBit - 64);
else
pValueResult->DWords.dw3 &= ~RT_BIT_32(iBit - 96);
#endif
}
return pValueResult;
}
/**
* Tests if a bit in a 128-bit unsigned integer value is set.
*
* @returns pValueResult.
* @param pValueResult The input and output value.
* @param iBit The bit to test.
*/
DECLINLINE(bool) RTUInt128BitTest(PRTUINT128U pValueResult, unsigned iBit)
{
bool fRc;
if (iBit < 64)
{
#if ARCH_BITS >= 64
fRc = RT_BOOL(pValueResult->s.Lo & RT_BIT_64(iBit));
#else
if (iBit < 32)
fRc = RT_BOOL(pValueResult->DWords.dw0 & RT_BIT_32(iBit));
else
fRc = RT_BOOL(pValueResult->DWords.dw1 & RT_BIT_32(iBit - 32));
#endif
}
else if (iBit < 128)
{
#if ARCH_BITS >= 64
fRc = RT_BOOL(pValueResult->s.Hi & RT_BIT_64(iBit - 64));
#else
if (iBit < 96)
fRc = RT_BOOL(pValueResult->DWords.dw2 & RT_BIT_32(iBit - 64));
else
fRc = RT_BOOL(pValueResult->DWords.dw3 & RT_BIT_32(iBit - 96));
#endif
}
else
fRc = false;
return fRc;
}
/**
* Set a range of bits a 128-bit unsigned integer value.
*
* @returns pValueResult.
* @param pValueResult The input and output value.
* @param iFirstBit The first bit to test.
* @param cBits The number of bits to set.
*/
DECLINLINE(PRTUINT128U) RTUInt128BitSetRange(PRTUINT128U pValueResult, unsigned iFirstBit, unsigned cBits)
{
/* bounds check & fix. */
if (iFirstBit < 128)
{
if (iFirstBit + cBits > 128)
cBits = 128 - iFirstBit;
#if ARCH_BITS >= 64
if (iFirstBit + cBits < 64)
pValueResult->s.Lo |= (RT_BIT_64(cBits) - 1) << iFirstBit;
else if (iFirstBit + cBits < 128 && iFirstBit >= 64)
pValueResult->s.Hi |= (RT_BIT_64(cBits) - 1) << (iFirstBit - 64);
else
#else
if (iFirstBit + cBits < 32)
pValueResult->DWords.dw0 |= (RT_BIT_32(cBits) - 1) << iFirstBit;
else if (iFirstBit + cBits < 64 && iFirstBit >= 32)
pValueResult->DWords.dw1 |= (RT_BIT_32(cBits) - 1) << (iFirstBit - 32);
else if (iFirstBit + cBits < 96 && iFirstBit >= 64)
pValueResult->DWords.dw2 |= (RT_BIT_32(cBits) - 1) << (iFirstBit - 64);
else if (iFirstBit + cBits < 128 && iFirstBit >= 96)
pValueResult->DWords.dw3 |= (RT_BIT_32(cBits) - 1) << (iFirstBit - 96);
else
#endif
while (cBits-- > 0)
RTUInt128BitSet(pValueResult, iFirstBit++);
}
return pValueResult;
}
/**
* Test if all the bits of a 128-bit unsigned integer value are set.
*
* @returns true if they are, false if they aren't.
* @param pValue The input and output value.
*/
DECLINLINE(bool) RTUInt128BitAreAllSet(PRTUINT128U pValue)
{
#if ARCH_BITS >= 64
return pValue->s.Hi == UINT64_MAX
&& pValue->s.Lo == UINT64_MAX;
#else
return pValue->DWords.dw0 == UINT32_MAX
&& pValue->DWords.dw1 == UINT32_MAX
&& pValue->DWords.dw2 == UINT32_MAX
&& pValue->DWords.dw3 == UINT32_MAX;
#endif
}
/**
* Test if all the bits of a 128-bit unsigned integer value are clear.
*
* @returns true if they are, false if they aren't.
* @param pValue The input and output value.
*/
DECLINLINE(bool) RTUInt128BitAreAllClear(PRTUINT128U pValue)
{
#if ARCH_BITS >= 64
return pValue->s.Hi == 0
&& pValue->s.Lo == 0;
#else
return pValue->DWords.dw0 == 0
&& pValue->DWords.dw1 == 0
&& pValue->DWords.dw2 == 0
&& pValue->DWords.dw3 == 0;
#endif
}
/** @} */
RT_C_DECLS_END
#endif