/// @ref core | |
/// @file glm/detail/func_integer.inl | |
#include "type_vec2.hpp" | |
#include "type_vec3.hpp" | |
#include "type_vec4.hpp" | |
#include "type_int.hpp" | |
#include "_vectorize.hpp" | |
#if(GLM_ARCH & GLM_ARCH_X86 && GLM_COMPILER & GLM_COMPILER_VC) | |
# include <intrin.h> | |
# pragma intrinsic(_BitScanReverse) | |
#endif//(GLM_ARCH & GLM_ARCH_X86 && GLM_COMPILER & GLM_COMPILER_VC) | |
#include <limits> | |
#if !GLM_HAS_EXTENDED_INTEGER_TYPE | |
# if GLM_COMPILER & GLM_COMPILER_GCC | |
# pragma GCC diagnostic ignored "-Wlong-long" | |
# endif | |
# if (GLM_COMPILER & GLM_COMPILER_CLANG) | |
# pragma clang diagnostic ignored "-Wc++11-long-long" | |
# endif | |
#endif | |
namespace glm{ | |
namespace detail | |
{ | |
template <typename T> | |
GLM_FUNC_QUALIFIER T mask(T Bits) | |
{ | |
return Bits >= sizeof(T) * 8 ? ~static_cast<T>(0) : (static_cast<T>(1) << Bits) - static_cast<T>(1); | |
} | |
template <typename T, glm::precision P, template <typename, glm::precision> class vecType, bool Aligned, bool EXEC> | |
struct compute_bitfieldReverseStep | |
{ | |
GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & v, T, T) | |
{ | |
return v; | |
} | |
}; | |
template <typename T, glm::precision P, template <typename, glm::precision> class vecType, bool Aligned> | |
struct compute_bitfieldReverseStep<T, P, vecType, Aligned, true> | |
{ | |
GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & v, T Mask, T Shift) | |
{ | |
return (v & Mask) << Shift | (v & (~Mask)) >> Shift; | |
} | |
}; | |
template <typename T, glm::precision P, template <typename, glm::precision> class vecType, bool Aligned, bool EXEC> | |
struct compute_bitfieldBitCountStep | |
{ | |
GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & v, T, T) | |
{ | |
return v; | |
} | |
}; | |
template <typename T, glm::precision P, template <typename, glm::precision> class vecType, bool Aligned> | |
struct compute_bitfieldBitCountStep<T, P, vecType, Aligned, true> | |
{ | |
GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & v, T Mask, T Shift) | |
{ | |
return (v & Mask) + ((v >> Shift) & Mask); | |
} | |
}; | |
template <typename genIUType, size_t Bits> | |
struct compute_findLSB | |
{ | |
GLM_FUNC_QUALIFIER static int call(genIUType Value) | |
{ | |
if(Value == 0) | |
return -1; | |
return glm::bitCount(~Value & (Value - static_cast<genIUType>(1))); | |
} | |
}; | |
# if GLM_HAS_BITSCAN_WINDOWS | |
template <typename genIUType> | |
struct compute_findLSB<genIUType, 32> | |
{ | |
GLM_FUNC_QUALIFIER static int call(genIUType Value) | |
{ | |
unsigned long Result(0); | |
unsigned char IsNotNull = _BitScanForward(&Result, *reinterpret_cast<unsigned long*>(&Value)); | |
return IsNotNull ? int(Result) : -1; | |
} | |
}; | |
# if !((GLM_COMPILER & GLM_COMPILER_VC) && (GLM_MODEL == GLM_MODEL_32)) | |
template <typename genIUType> | |
struct compute_findLSB<genIUType, 64> | |
{ | |
GLM_FUNC_QUALIFIER static int call(genIUType Value) | |
{ | |
unsigned long Result(0); | |
unsigned char IsNotNull = _BitScanForward64(&Result, *reinterpret_cast<unsigned __int64*>(&Value)); | |
return IsNotNull ? int(Result) : -1; | |
} | |
}; | |
# endif | |
# endif//GLM_HAS_BITSCAN_WINDOWS | |
template <typename T, glm::precision P, template <class, glm::precision> class vecType, bool EXEC = true> | |
struct compute_findMSB_step_vec | |
{ | |
GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & x, T Shift) | |
{ | |
return x | (x >> Shift); | |
} | |
}; | |
template <typename T, glm::precision P, template <typename, glm::precision> class vecType> | |
struct compute_findMSB_step_vec<T, P, vecType, false> | |
{ | |
GLM_FUNC_QUALIFIER static vecType<T, P> call(vecType<T, P> const & x, T) | |
{ | |
return x; | |
} | |
}; | |
template <typename T, glm::precision P, template <typename, glm::precision> class vecType, int> | |
struct compute_findMSB_vec | |
{ | |
GLM_FUNC_QUALIFIER static vecType<int, P> call(vecType<T, P> const & vec) | |
{ | |
vecType<T, P> x(vec); | |
x = compute_findMSB_step_vec<T, P, vecType, sizeof(T) * 8 >= 8>::call(x, static_cast<T>( 1)); | |
x = compute_findMSB_step_vec<T, P, vecType, sizeof(T) * 8 >= 8>::call(x, static_cast<T>( 2)); | |
x = compute_findMSB_step_vec<T, P, vecType, sizeof(T) * 8 >= 8>::call(x, static_cast<T>( 4)); | |
x = compute_findMSB_step_vec<T, P, vecType, sizeof(T) * 8 >= 16>::call(x, static_cast<T>( 8)); | |
x = compute_findMSB_step_vec<T, P, vecType, sizeof(T) * 8 >= 32>::call(x, static_cast<T>(16)); | |
x = compute_findMSB_step_vec<T, P, vecType, sizeof(T) * 8 >= 64>::call(x, static_cast<T>(32)); | |
return vecType<int, P>(sizeof(T) * 8 - 1) - glm::bitCount(~x); | |
} | |
}; | |
# if GLM_HAS_BITSCAN_WINDOWS | |
template <typename genIUType> | |
GLM_FUNC_QUALIFIER int compute_findMSB_32(genIUType Value) | |
{ | |
unsigned long Result(0); | |
unsigned char IsNotNull = _BitScanReverse(&Result, *reinterpret_cast<unsigned long*>(&Value)); | |
return IsNotNull ? int(Result) : -1; | |
} | |
template <typename T, glm::precision P, template<typename, glm::precision> class vecType> | |
struct compute_findMSB_vec<T, P, vecType, 32> | |
{ | |
GLM_FUNC_QUALIFIER static vecType<int, P> call(vecType<T, P> const & x) | |
{ | |
return detail::functor1<int, T, P, vecType>::call(compute_findMSB_32, x); | |
} | |
}; | |
# if !((GLM_COMPILER & GLM_COMPILER_VC) && (GLM_MODEL == GLM_MODEL_32)) | |
template <typename genIUType> | |
GLM_FUNC_QUALIFIER int compute_findMSB_64(genIUType Value) | |
{ | |
unsigned long Result(0); | |
unsigned char IsNotNull = _BitScanReverse64(&Result, *reinterpret_cast<unsigned __int64*>(&Value)); | |
return IsNotNull ? int(Result) : -1; | |
} | |
template <typename T, glm::precision P, template <class, glm::precision> class vecType> | |
struct compute_findMSB_vec<T, P, vecType, 64> | |
{ | |
GLM_FUNC_QUALIFIER static vecType<int, P> call(vecType<T, P> const & x) | |
{ | |
return detail::functor1<int, T, P, vecType>::call(compute_findMSB_64, x); | |
} | |
}; | |
# endif | |
# endif//GLM_HAS_BITSCAN_WINDOWS | |
}//namespace detail | |
// uaddCarry | |
GLM_FUNC_QUALIFIER uint uaddCarry(uint const & x, uint const & y, uint & Carry) | |
{ | |
uint64 const Value64(static_cast<uint64>(x) + static_cast<uint64>(y)); | |
uint64 const Max32((static_cast<uint64>(1) << static_cast<uint64>(32)) - static_cast<uint64>(1)); | |
Carry = Value64 > Max32 ? 1u : 0u; | |
return static_cast<uint32>(Value64 % (Max32 + static_cast<uint64>(1))); | |
} | |
template <precision P, template <typename, precision> class vecType> | |
GLM_FUNC_QUALIFIER vecType<uint, P> uaddCarry(vecType<uint, P> const & x, vecType<uint, P> const & y, vecType<uint, P> & Carry) | |
{ | |
vecType<uint64, P> Value64(vecType<uint64, P>(x) + vecType<uint64, P>(y)); | |
vecType<uint64, P> Max32((static_cast<uint64>(1) << static_cast<uint64>(32)) - static_cast<uint64>(1)); | |
Carry = mix(vecType<uint32, P>(0), vecType<uint32, P>(1), greaterThan(Value64, Max32)); | |
return vecType<uint32,P>(Value64 % (Max32 + static_cast<uint64>(1))); | |
} | |
// usubBorrow | |
GLM_FUNC_QUALIFIER uint usubBorrow(uint const & x, uint const & y, uint & Borrow) | |
{ | |
GLM_STATIC_ASSERT(sizeof(uint) == sizeof(uint32), "uint and uint32 size mismatch"); | |
Borrow = x >= y ? static_cast<uint32>(0) : static_cast<uint32>(1); | |
if(y >= x) | |
return y - x; | |
else | |
return static_cast<uint32>((static_cast<int64>(1) << static_cast<int64>(32)) + (static_cast<int64>(y) - static_cast<int64>(x))); | |
} | |
template <precision P, template <typename, precision> class vecType> | |
GLM_FUNC_QUALIFIER vecType<uint, P> usubBorrow(vecType<uint, P> const & x, vecType<uint, P> const & y, vecType<uint, P> & Borrow) | |
{ | |
Borrow = mix(vecType<uint, P>(1), vecType<uint, P>(0), greaterThanEqual(x, y)); | |
vecType<uint, P> const YgeX(y - x); | |
vecType<uint, P> const XgeY(vecType<uint32, P>((static_cast<int64>(1) << static_cast<int64>(32)) + (vecType<int64, P>(y) - vecType<int64, P>(x)))); | |
return mix(XgeY, YgeX, greaterThanEqual(y, x)); | |
} | |
// umulExtended | |
GLM_FUNC_QUALIFIER void umulExtended(uint const & x, uint const & y, uint & msb, uint & lsb) | |
{ | |
GLM_STATIC_ASSERT(sizeof(uint) == sizeof(uint32), "uint and uint32 size mismatch"); | |
uint64 Value64 = static_cast<uint64>(x) * static_cast<uint64>(y); | |
msb = static_cast<uint>(Value64 >> static_cast<uint64>(32)); | |
lsb = static_cast<uint>(Value64); | |
} | |
template <precision P, template <typename, precision> class vecType> | |
GLM_FUNC_QUALIFIER void umulExtended(vecType<uint, P> const & x, vecType<uint, P> const & y, vecType<uint, P> & msb, vecType<uint, P> & lsb) | |
{ | |
GLM_STATIC_ASSERT(sizeof(uint) == sizeof(uint32), "uint and uint32 size mismatch"); | |
vecType<uint64, P> Value64(vecType<uint64, P>(x) * vecType<uint64, P>(y)); | |
msb = vecType<uint32, P>(Value64 >> static_cast<uint64>(32)); | |
lsb = vecType<uint32, P>(Value64); | |
} | |
// imulExtended | |
GLM_FUNC_QUALIFIER void imulExtended(int x, int y, int & msb, int & lsb) | |
{ | |
GLM_STATIC_ASSERT(sizeof(int) == sizeof(int32), "int and int32 size mismatch"); | |
int64 Value64 = static_cast<int64>(x) * static_cast<int64>(y); | |
msb = static_cast<int>(Value64 >> static_cast<int64>(32)); | |
lsb = static_cast<int>(Value64); | |
} | |
template <precision P, template <typename, precision> class vecType> | |
GLM_FUNC_QUALIFIER void imulExtended(vecType<int, P> const & x, vecType<int, P> const & y, vecType<int, P> & msb, vecType<int, P> & lsb) | |
{ | |
GLM_STATIC_ASSERT(sizeof(int) == sizeof(int32), "int and int32 size mismatch"); | |
vecType<int64, P> Value64(vecType<int64, P>(x) * vecType<int64, P>(y)); | |
lsb = vecType<int32, P>(Value64 & static_cast<int64>(0xFFFFFFFF)); | |
msb = vecType<int32, P>((Value64 >> static_cast<int64>(32)) & static_cast<int64>(0xFFFFFFFF)); | |
} | |
// bitfieldExtract | |
template <typename genIUType> | |
GLM_FUNC_QUALIFIER genIUType bitfieldExtract(genIUType Value, int Offset, int Bits) | |
{ | |
return bitfieldExtract(tvec1<genIUType>(Value), Offset, Bits).x; | |
} | |
template <typename T, precision P, template <typename, precision> class vecType> | |
GLM_FUNC_QUALIFIER vecType<T, P> bitfieldExtract(vecType<T, P> const & Value, int Offset, int Bits) | |
{ | |
GLM_STATIC_ASSERT(std::numeric_limits<T>::is_integer, "'bitfieldExtract' only accept integer inputs"); | |
return (Value >> static_cast<T>(Offset)) & static_cast<T>(detail::mask(Bits)); | |
} | |
// bitfieldInsert | |
template <typename genIUType> | |
GLM_FUNC_QUALIFIER genIUType bitfieldInsert(genIUType const & Base, genIUType const & Insert, int Offset, int Bits) | |
{ | |
return bitfieldInsert(tvec1<genIUType>(Base), tvec1<genIUType>(Insert), Offset, Bits).x; | |
} | |
template <typename T, precision P, template <typename, precision> class vecType> | |
GLM_FUNC_QUALIFIER vecType<T, P> bitfieldInsert(vecType<T, P> const & Base, vecType<T, P> const & Insert, int Offset, int Bits) | |
{ | |
GLM_STATIC_ASSERT(std::numeric_limits<T>::is_integer, "'bitfieldInsert' only accept integer values"); | |
T const Mask = static_cast<T>(detail::mask(Bits) << Offset); | |
return (Base & ~Mask) | (Insert & Mask); | |
} | |
// bitfieldReverse | |
template <typename genType> | |
GLM_FUNC_QUALIFIER genType bitfieldReverse(genType x) | |
{ | |
return bitfieldReverse(glm::tvec1<genType, glm::defaultp>(x)).x; | |
} | |
template <typename T, glm::precision P, template <typename, glm::precision> class vecType> | |
GLM_FUNC_QUALIFIER vecType<T, P> bitfieldReverse(vecType<T, P> const & v) | |
{ | |
vecType<T, P> x(v); | |
x = detail::compute_bitfieldReverseStep<T, P, vecType, detail::is_aligned<P>::value, sizeof(T) * 8>= 2>::call(x, T(0x5555555555555555ull), static_cast<T>( 1)); | |
x = detail::compute_bitfieldReverseStep<T, P, vecType, detail::is_aligned<P>::value, sizeof(T) * 8>= 4>::call(x, T(0x3333333333333333ull), static_cast<T>( 2)); | |
x = detail::compute_bitfieldReverseStep<T, P, vecType, detail::is_aligned<P>::value, sizeof(T) * 8>= 8>::call(x, T(0x0F0F0F0F0F0F0F0Full), static_cast<T>( 4)); | |
x = detail::compute_bitfieldReverseStep<T, P, vecType, detail::is_aligned<P>::value, sizeof(T) * 8>= 16>::call(x, T(0x00FF00FF00FF00FFull), static_cast<T>( 8)); | |
x = detail::compute_bitfieldReverseStep<T, P, vecType, detail::is_aligned<P>::value, sizeof(T) * 8>= 32>::call(x, T(0x0000FFFF0000FFFFull), static_cast<T>(16)); | |
x = detail::compute_bitfieldReverseStep<T, P, vecType, detail::is_aligned<P>::value, sizeof(T) * 8>= 64>::call(x, T(0x00000000FFFFFFFFull), static_cast<T>(32)); | |
return x; | |
} | |
// bitCount | |
template <typename genType> | |
GLM_FUNC_QUALIFIER int bitCount(genType x) | |
{ | |
return bitCount(glm::tvec1<genType, glm::defaultp>(x)).x; | |
} | |
template <typename T, glm::precision P, template <typename, glm::precision> class vecType> | |
GLM_FUNC_QUALIFIER vecType<int, P> bitCount(vecType<T, P> const & v) | |
{ | |
vecType<typename detail::make_unsigned<T>::type, P> x(*reinterpret_cast<vecType<typename detail::make_unsigned<T>::type, P> const *>(&v)); | |
x = detail::compute_bitfieldBitCountStep<typename detail::make_unsigned<T>::type, P, vecType, detail::is_aligned<P>::value, sizeof(T) * 8>= 2>::call(x, typename detail::make_unsigned<T>::type(0x5555555555555555ull), typename detail::make_unsigned<T>::type( 1)); | |
x = detail::compute_bitfieldBitCountStep<typename detail::make_unsigned<T>::type, P, vecType, detail::is_aligned<P>::value, sizeof(T) * 8>= 4>::call(x, typename detail::make_unsigned<T>::type(0x3333333333333333ull), typename detail::make_unsigned<T>::type( 2)); | |
x = detail::compute_bitfieldBitCountStep<typename detail::make_unsigned<T>::type, P, vecType, detail::is_aligned<P>::value, sizeof(T) * 8>= 8>::call(x, typename detail::make_unsigned<T>::type(0x0F0F0F0F0F0F0F0Full), typename detail::make_unsigned<T>::type( 4)); | |
x = detail::compute_bitfieldBitCountStep<typename detail::make_unsigned<T>::type, P, vecType, detail::is_aligned<P>::value, sizeof(T) * 8>= 16>::call(x, typename detail::make_unsigned<T>::type(0x00FF00FF00FF00FFull), typename detail::make_unsigned<T>::type( 8)); | |
x = detail::compute_bitfieldBitCountStep<typename detail::make_unsigned<T>::type, P, vecType, detail::is_aligned<P>::value, sizeof(T) * 8>= 32>::call(x, typename detail::make_unsigned<T>::type(0x0000FFFF0000FFFFull), typename detail::make_unsigned<T>::type(16)); | |
x = detail::compute_bitfieldBitCountStep<typename detail::make_unsigned<T>::type, P, vecType, detail::is_aligned<P>::value, sizeof(T) * 8>= 64>::call(x, typename detail::make_unsigned<T>::type(0x00000000FFFFFFFFull), typename detail::make_unsigned<T>::type(32)); | |
return vecType<int, P>(x); | |
} | |
// findLSB | |
template <typename genIUType> | |
GLM_FUNC_QUALIFIER int findLSB(genIUType Value) | |
{ | |
GLM_STATIC_ASSERT(std::numeric_limits<genIUType>::is_integer, "'findLSB' only accept integer values"); | |
return detail::compute_findLSB<genIUType, sizeof(genIUType) * 8>::call(Value); | |
} | |
template <typename T, precision P, template <typename, precision> class vecType> | |
GLM_FUNC_QUALIFIER vecType<int, P> findLSB(vecType<T, P> const & x) | |
{ | |
GLM_STATIC_ASSERT(std::numeric_limits<T>::is_integer, "'findLSB' only accept integer values"); | |
return detail::functor1<int, T, P, vecType>::call(findLSB, x); | |
} | |
// findMSB | |
template <typename genIUType> | |
GLM_FUNC_QUALIFIER int findMSB(genIUType x) | |
{ | |
GLM_STATIC_ASSERT(std::numeric_limits<genIUType>::is_integer, "'findMSB' only accept integer values"); | |
return findMSB(tvec1<genIUType>(x)).x; | |
} | |
template <typename T, precision P, template <typename, precision> class vecType> | |
GLM_FUNC_QUALIFIER vecType<int, P> findMSB(vecType<T, P> const & x) | |
{ | |
GLM_STATIC_ASSERT(std::numeric_limits<T>::is_integer, "'findMSB' only accept integer values"); | |
return detail::compute_findMSB_vec<T, P, vecType, sizeof(T) * 8>::call(x); | |
} | |
}//namespace glm | |
#if GLM_ARCH != GLM_ARCH_PURE && GLM_HAS_UNRESTRICTED_UNIONS | |
# include "func_integer_simd.inl" | |
#endif | |