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202 lines
9.2 KiB
C++
202 lines
9.2 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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/// OpenGL Mathematics (glm.g-truc.net)
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///
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/// Copyright (c) 2005 - 2011 G-Truc Creation (www.g-truc.net)
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/// Permission is hereby granted, free of charge, to any person obtaining a copy
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/// of this software and associated documentation files (the "Software"), to deal
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/// in the Software without restriction, including without limitation the rights
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/// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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/// copies of the Software, and to permit persons to whom the Software is
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/// furnished to do so, subject to the following conditions:
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///
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/// The above copyright notice and this permission notice shall be included in
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/// all copies or substantial portions of the Software.
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///
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/// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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/// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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/// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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/// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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/// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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/// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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/// THE SOFTWARE.
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///
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/// @ref core
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/// @file glm/core/func_integer.hpp
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/// @date 2010-03-17 / 2011-06-18
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/// @author Christophe Riccio
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///
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/// @see - <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.8</a>
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///
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/// @defgroup core_func_integer Integer functions
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/// @ingroup core
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///
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/// These all operate component-wise. The description is per component.
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/// The notation [a, b] means the set of bits from bit-number a through bit-number
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/// b, inclusive. The lowest-order bit is bit 0.
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///////////////////////////////////////////////////////////////////////////////////
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#ifndef glm_core_func_integer
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#define glm_core_func_integer GLM_VERSION
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namespace glm
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{
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/// @addtogroup core_func_integer
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/// @{
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/// Adds 32-bit unsigned integer x and y, returning the sum
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/// modulo pow(2, 32). The value carry is set to 0 if the sum was
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/// less than pow(2, 32), or to 1 otherwise.
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///
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/// @tparam genUType Unsigned integer scalar or vector types.
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///
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/// @see - <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/uaddCarry.xml">GLSL uaddCarry man page</a>
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/// @see - <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.8</a>
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template <typename genUType>
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genUType uaddCarry(
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genUType const & x,
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genUType const & y,
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genUType & carry);
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/// Subtracts the 32-bit unsigned integer y from x, returning
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/// the difference if non-negative, or pow(2, 32) plus the difference
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/// otherwise. The value borrow is set to 0 if x >= y, or to 1 otherwise.
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///
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/// @tparam genUType Unsigned integer scalar or vector types.
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///
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/// @see - <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/usubBorrow.xml">GLSL usubBorrow man page</a>
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/// @see - <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.8</a>
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template <typename genUType>
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genUType usubBorrow(
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genUType const & x,
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genUType const & y,
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genUType & borrow);
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/// Multiplies 32-bit integers x and y, producing a 64-bit
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/// result. The 32 least-significant bits are returned in lsb.
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/// The 32 most-significant bits are returned in msb.
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///
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/// @tparam genUType Unsigned integer scalar or vector types.
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///
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/// @see - <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/umulExtended.xml">GLSL umulExtended man page</a>
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/// @see - <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.8</a>
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template <typename genUType>
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void umulExtended(
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genUType const & x,
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genUType const & y,
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genUType & msb,
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genUType & lsb);
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/// Multiplies 32-bit integers x and y, producing a 64-bit
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/// result. The 32 least-significant bits are returned in lsb.
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/// The 32 most-significant bits are returned in msb.
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///
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/// @tparam genIType Signed integer scalar or vector types.
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///
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/// @see - <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/imulExtended.xml">GLSL imulExtended man page</a>
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/// @see - <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.8</a>
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template <typename genIType>
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void imulExtended(
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genIType const & x,
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genIType const & y,
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genIType & msb,
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genIType & lsb);
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/// Extracts bits [offset, offset + bits - 1] from value,
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/// returning them in the least significant bits of the result.
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/// For unsigned data types, the most significant bits of the
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/// result will be set to zero. For signed data types, the
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/// most significant bits will be set to the value of bit offset + base – 1.
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///
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/// If bits is zero, the result will be zero. The result will be
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/// undefined if offset or bits is negative, or if the sum of
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/// offset and bits is greater than the number of bits used
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/// to store the operand.
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///
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/// @tparam genIUType Signed or unsigned integer scalar or vector types.
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///
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/// @see - <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/bitfieldExtract.xml">GLSL bitfieldExtract man page</a>
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/// @see - <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.8</a>
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template <typename genIUType>
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genIUType bitfieldExtract(
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genIUType const & Value,
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int const & Offset,
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int const & Bits);
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/// Returns the insertion the bits least-significant bits of insert into base.
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///
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/// The result will have bits [offset, offset + bits - 1] taken
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/// from bits [0, bits – 1] of insert, and all other bits taken
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/// directly from the corresponding bits of base. If bits is
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/// zero, the result will simply be base. The result will be
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/// undefined if offset or bits is negative, or if the sum of
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/// offset and bits is greater than the number of bits used to
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/// store the operand.
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///
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/// @tparam genIUType Signed or unsigned integer scalar or vector types.
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///
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/// @see - <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/bitfieldInsert.xml">GLSL bitfieldInsert man page</a>
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/// @see - <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.8</a>
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template <typename genIUType>
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genIUType bitfieldInsert(
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genIUType const & Base,
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genIUType const & Insert,
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int const & Offset,
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int const & Bits);
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/// Returns the reversal of the bits of value.
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/// The bit numbered n of the result will be taken from bit (bits - 1) - n of value,
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/// where bits is the total number of bits used to represent value.
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///
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/// @tparam genIUType Signed or unsigned integer scalar or vector types.
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///
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/// @see - <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/bitfieldReverse.xml">GLSL bitfieldReverse man page</a>
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/// @see - <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.8</a>
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template <typename genIUType>
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genIUType bitfieldReverse(genIUType const & value);
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/// Returns the number of bits set to 1 in the binary representation of value.
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///
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/// @tparam genIUType Signed or unsigned integer scalar or vector types.
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///
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/// @see - <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/bitCount.xml">GLSL bitCount man page</a>
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/// @see - <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.8</a>
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///
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/// @todo Clarify the declaration to specify that scalars are suported.
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template <typename T, template <typename> class genIUType>
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typename genIUType<T>::signed_type bitCount(genIUType<T> const & Value);
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/// Returns the bit number of the least significant bit set to
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/// 1 in the binary representation of value.
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/// If value is zero, -1 will be returned.
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///
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/// @tparam genIUType Signed or unsigned integer scalar or vector types.
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///
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/// @see - <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/findLSB.xml">GLSL findLSB man page</a>
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/// @see - <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.8</a>
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///
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/// @todo Clarify the declaration to specify that scalars are suported.
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template <typename T, template <typename> class genIUType>
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typename genIUType<T>::signed_type findLSB(genIUType<T> const & Value);
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/// Returns the bit number of the most significant bit in the binary representation of value.
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/// For positive integers, the result will be the bit number of the most significant bit set to 1.
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/// For negative integers, the result will be the bit number of the most significant
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/// bit set to 0. For a value of zero or negative one, -1 will be returned.
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///
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/// @tparam genIUType Signed or unsigned integer scalar or vector types.
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///
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/// @see - <a href="http://www.opengl.org/sdk/docs/manglsl/xhtml/findMSB.xml">GLSL findMSB man page</a>
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/// @see - <a href="http://www.opengl.org/registry/doc/GLSLangSpec.4.20.8.pdf">GLSL 4.20.8 specification, section 8.8</a>
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///
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/// @todo Clarify the declaration to specify that scalars are suported.
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template <typename T, template <typename> class genIUType>
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typename genIUType<T>::signed_type findMSB(genIUType<T> const & Value);
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/// @}
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}//namespace glm
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#include "func_integer.inl"
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#endif//glm_core_func_integer
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