CS计算机代考程序代写 ///////////////////////////////////////////////////////////////////////////////////

///////////////////////////////////////////////////////////////////////////////////
/// OpenGL Mathematics (glm.g-truc.net)
///
/// Copyright (c) 2005 – 2015 G-Truc Creation (www.g-truc.net)
/// Permission is hereby granted, free of charge, to any person obtaining a copy
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/// in the Software without restriction, including without limitation the rights
/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
/// copies of the Software, and to permit persons to whom the Software is
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///
/// The above copyright notice and this permission notice shall be included in
/// all copies or substantial portions of the Software.
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/// By making use of the Software for military purposes, you choose to make
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/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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///
/// @ref core
/// @file glm/detail/func_integer.hpp
/// @date 2010-03-17 / 2011-06-18
/// @author Christophe Riccio
///
/// @see GLSL 4.20.8 specification, section 8.8 Integer Functions
///
/// @defgroup core_func_integer Integer functions
/// @ingroup core
///
/// These all operate component-wise. The description is per component.
/// The notation [a, b] means the set of bits from bit-number a through bit-number
/// b, inclusive. The lowest-order bit is bit 0.
///////////////////////////////////////////////////////////////////////////////////

#pragma once

#include “setup.hpp”
#include “precision.hpp”
#include “func_common.hpp”
#include “func_vector_relational.hpp”

namespace glm
{
/// @addtogroup core_func_integer
/// @{

/// Adds 32-bit unsigned integer x and y, returning the sum
/// modulo pow(2, 32). The value carry is set to 0 if the sum was
/// less than pow(2, 32), or to 1 otherwise.
///
/// @tparam genUType Unsigned integer scalar or vector types.
///
/// @see GLSL uaddCarry man page
/// @see GLSL 4.20.8 specification, section 8.8 Integer Functions
template class vecType>
GLM_FUNC_DECL vecType uaddCarry(
vecType const & x,
vecType const & y,
vecType & carry);

/// Subtracts the 32-bit unsigned integer y from x, returning
/// the difference if non-negative, or pow(2, 32) plus the difference
/// otherwise. The value borrow is set to 0 if x >= y, or to 1 otherwise.
///
/// @tparam genUType Unsigned integer scalar or vector types.
///
/// @see GLSL usubBorrow man page
/// @see GLSL 4.20.8 specification, section 8.8 Integer Functions
template class vecType>
GLM_FUNC_DECL vecType usubBorrow(
vecType const & x,
vecType const & y,
vecType & borrow);

/// Multiplies 32-bit integers x and y, producing a 64-bit
/// result. The 32 least-significant bits are returned in lsb.
/// The 32 most-significant bits are returned in msb.
///
/// @tparam genUType Unsigned integer scalar or vector types.
///
/// @see GLSL umulExtended man page
/// @see GLSL 4.20.8 specification, section 8.8 Integer Functions
template class vecType>
GLM_FUNC_DECL void umulExtended(
vecType const & x,
vecType const & y,
vecType & msb,
vecType & lsb);

/// Multiplies 32-bit integers x and y, producing a 64-bit
/// result. The 32 least-significant bits are returned in lsb.
/// The 32 most-significant bits are returned in msb.
///
/// @tparam genIType Signed integer scalar or vector types.
///
/// @see GLSL imulExtended man page
/// @see GLSL 4.20.8 specification, section 8.8 Integer Functions
template class vecType>
GLM_FUNC_DECL void imulExtended(
vecType const & x,
vecType const & y,
vecType & msb,
vecType & lsb);

/// Extracts bits [offset, offset + bits – 1] from value,
/// returning them in the least significant bits of the result.
/// For unsigned data types, the most significant bits of the
/// result will be set to zero. For signed data types, the
/// most significant bits will be set to the value of bit offset + base – 1.
///
/// If bits is zero, the result will be zero. The result will be
/// undefined if offset or bits is negative, or if the sum of
/// offset and bits is greater than the number of bits used
/// to store the operand.
///
/// @tparam T Signed or unsigned integer scalar or vector types.
///
/// @see GLSL bitfieldExtract man page
/// @see GLSL 4.20.8 specification, section 8.8 Integer Functions
template class vecType>
GLM_FUNC_DECL vecType bitfieldExtract(
vecType const & Value,
int Offset,
int Bits);

/// Returns the insertion the bits least-significant bits of insert into base.
///
/// The result will have bits [offset, offset + bits – 1] taken
/// from bits [0, bits – 1] of insert, and all other bits taken
/// directly from the corresponding bits of base. If bits is
/// zero, the result will simply be base. The result will be
/// undefined if offset or bits is negative, or if the sum of
/// offset and bits is greater than the number of bits used to
/// store the operand.
///
/// @tparam T Signed or unsigned integer scalar or vector types.
///
/// @see GLSL bitfieldInsert man page
/// @see GLSL 4.20.8 specification, section 8.8 Integer Functions
template class vecType>
GLM_FUNC_DECL vecType bitfieldInsert(
vecType const & Base,
vecType const & Insert,
int Offset,
int Bits);

/// Returns the reversal of the bits of value.
/// The bit numbered n of the result will be taken from bit (bits – 1) – n of value,
/// where bits is the total number of bits used to represent value.
///
/// @tparam T Signed or unsigned integer scalar or vector types.
///
/// @see GLSL bitfieldReverse man page
/// @see GLSL 4.20.8 specification, section 8.8 Integer Functions
template class vecType>
GLM_FUNC_DECL vecType bitfieldReverse(vecType const & v);

/// Returns the number of bits set to 1 in the binary representation of value.
///
/// @tparam T Signed or unsigned integer scalar or vector types.
///
/// @see GLSL bitCount man page
/// @see GLSL 4.20.8 specification, section 8.8 Integer Functions
template
GLM_FUNC_DECL int bitCount(genType v);

/// Returns the bit number of the least significant bit set to
/// 1 in the binary representation of value.
/// If value is zero, -1 will be returned.
///
/// @tparam T Signed or unsigned integer scalar types.
///
/// @see GLSL findLSB man page
/// @see GLSL 4.20.8 specification, section 8.8 Integer Functions
template
GLM_FUNC_DECL int findLSB(genIUType x);

/// Returns the bit number of the most significant bit in the binary representation of value.
/// For positive integers, the result will be the bit number of the most significant bit set to 1.
/// For negative integers, the result will be the bit number of the most significant
/// bit set to 0. For a value of zero or negative one, -1 will be returned.
///
/// @tparam T Signed or unsigned integer scalar types.
///
/// @see GLSL findMSB man page
/// @see GLSL 4.20.8 specification, section 8.8 Integer Functions
template
GLM_FUNC_DECL int findMSB(genIUType x);

/// @}
}//namespace glm

#include “func_integer.inl”

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