/// @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