203 lines
10 KiB
C++
203 lines
10 KiB
C++
/// @ref core
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/// @file glm/detail/func_integer.hpp
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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 Integer Functions</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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#pragma once
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#include "setup.hpp"
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#include "precision.hpp"
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#include "func_common.hpp"
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#include "func_vector_relational.hpp"
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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 Integer Functions</a>
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template <precision P, template <typename, precision> class vecType>
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GLM_FUNC_DECL vecType<uint, P> uaddCarry(
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vecType<uint, P> const & x,
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vecType<uint, P> const & y,
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vecType<uint, P> & 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 Integer Functions</a>
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template <precision P, template <typename, precision> class vecType>
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GLM_FUNC_DECL vecType<uint, P> usubBorrow(
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vecType<uint, P> const & x,
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vecType<uint, P> const & y,
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vecType<uint, P> & 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 Integer Functions</a>
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template <precision P, template <typename, precision> class vecType>
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GLM_FUNC_DECL void umulExtended(
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vecType<uint, P> const & x,
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vecType<uint, P> const & y,
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vecType<uint, P> & msb,
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vecType<uint, P> & 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 Integer Functions</a>
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template <precision P, template <typename, precision> class vecType>
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GLM_FUNC_DECL void imulExtended(
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vecType<int, P> const & x,
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vecType<int, P> const & y,
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vecType<int, P> & msb,
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vecType<int, P> & 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 T 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 Integer Functions</a>
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template <typename T, precision P, template <typename, precision> class vecType>
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GLM_FUNC_DECL vecType<T, P> bitfieldExtract(
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vecType<T, P> const & Value,
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int Offset,
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int 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 T 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 Integer Functions</a>
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template <typename T, precision P, template <typename, precision> class vecType>
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GLM_FUNC_DECL vecType<T, P> bitfieldInsert(
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vecType<T, P> const & Base,
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vecType<T, P> const & Insert,
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int Offset,
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int 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 T 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 Integer Functions</a>
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template <typename T, precision P, template <typename, precision> class vecType>
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GLM_FUNC_DECL vecType<T, P> bitfieldReverse(vecType<T, P> const & v);
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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 T 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 Integer Functions</a>
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template <typename genType>
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GLM_FUNC_DECL int bitCount(genType v);
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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 T 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 Integer Functions</a>
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template <typename T, precision P, template <typename, precision> class vecType>
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GLM_FUNC_DECL vecType<int, P> bitCount(vecType<T, P> const & v);
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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 T Signed or unsigned integer scalar 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 Integer Functions</a>
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template <typename genIUType>
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GLM_FUNC_DECL int findLSB(genIUType x);
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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 T Signed or unsigned integer scalar 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 Integer Functions</a>
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template <typename T, precision P, template <typename, precision> class vecType>
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GLM_FUNC_DECL vecType<int, P> findLSB(vecType<T, P> const & v);
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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 T Signed or unsigned integer scalar 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 Integer Functions</a>
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template <typename genIUType>
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GLM_FUNC_DECL int findMSB(genIUType x);
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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 T Signed or unsigned integer scalar 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 Integer Functions</a>
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template <typename T, precision P, template <typename, precision> class vecType>
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GLM_FUNC_DECL vecType<int, P> findMSB(vecType<T, P> const & v);
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/// @}
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}//namespace glm
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#include "func_integer.inl"
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