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///////////////////////////////////////////////////////////////////////////////////////////////////
// OpenGL Mathematics Copyright (c) 2005 - 2011 G-Truc Creation (www.g-truc.net)
///////////////////////////////////////////////////////////////////////////////////////////////////
// Created : 2010-03-17
// Updated : 2010-03-31
// Licence : This source is under MIT License
// File : glm/core/func_integer.hpp
///////////////////////////////////////////////////////////////////////////////////////////////////
#ifndef glm_core_func_integer
#define glm_core_func_integer
namespace glm
{
namespace core{
namespace function{
//! Define integer functions from Section 8.8 of GLSL 4.00.8 specification.
namespace integer{
/// \addtogroup core_funcs
///@{
//! 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.
//!
//! \li <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/uaddCarry.xml">GLSL uaddCarry man page</a>
//! \li GLSL 4.00.08 specification, section 8.8
template <typename genUType>
genUType uaddCarry(
genUType const & x,
genUType const & y,
genUType & 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.
//!
//! \li <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/usubBorrow.xml">GLSL usubBorrow man page</a>
//! \li GLSL 4.00.08 specification, section 8.8
template <typename genUType>
genUType usubBorrow(
genUType const & x,
genUType const & y,
genUType & 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.
//!
//! \li <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/umulExtended.xml">GLSL umulExtended man page</a>
//! \li GLSL 4.00.08 specification, section 8.8
template <typename genUType>
void umulExtended(
genUType const & x,
genUType const & y,
genUType & msb,
genUType & 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.
//!
//! \li <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/imulExtended.xml">GLSL imulExtended man page</a>
//! \li GLSL 4.00.08 specification, section 8.8
template <typename genIType>
void imulExtended(
genIType const & x,
genIType const & y,
genIType & msb,
genIType & 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.
//!
//! \li <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/bitfieldExtract.xml">GLSL bitfieldExtract man page</a>
//! \li GLSL 4.00.08 specification, section 8.8
template <typename genIUType>
genIUType bitfieldExtract(
genIUType const & Value,
int const & Offset,
int const & 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.
//!
//! \li <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/bitfieldInsert.xml">GLSL bitfieldInsert man page</a>
//! \li GLSL 4.00.08 specification, section 8.8
template <typename genIUType>
genIUType bitfieldInsert(
genIUType const & Base,
genIUType const & Insert,
int const & Offset,
int const & 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.
//!
//! \li <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/bitfieldReverse.xml">GLSL bitfieldReverse man page</a>
//! \li GLSL 4.00.08 specification, section 8.8
template <typename genIUType>
genIUType bitfieldReverse(genIUType const & value);
//! Returns the number of bits set to 1 in the binary representation of value.
//!
//! \li <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/bitCount.xml">GLSL bitCount man page</a>
//! \li GLSL 4.00.08 specification, section 8.8
template <typename T, template <typename> class C>
typename C<T>::signed_type bitCount(C<T> const & Value);
//! 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.
//!
//! \li <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/findLSB.xml">GLSL findLSB man page</a>
//! \li GLSL 4.00.08 specification, section 8.8
template <typename T, template <typename> class C>
typename C<T>::signed_type findLSB(C<T> const & Value);
//! 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.
//!
//! \li <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/findMSB.xml">GLSL findMSB man page</a>
//! \li GLSL 4.00.08 specification, section 8.8
template <typename T, template <typename> class C>
typename C<T>::signed_type findMSB(C<T> const & Value);
///@}
}//namespace integer
}//namespace function
}//namespace core
using namespace core::function::integer;
}//namespace glm
#include "func_integer.inl"
#endif//glm_core_func_integer
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