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Diffstat (limited to 'depedencies/include/glm/gtx/integer.inl')
-rw-r--r-- | depedencies/include/glm/gtx/integer.inl | 182 |
1 files changed, 0 insertions, 182 deletions
diff --git a/depedencies/include/glm/gtx/integer.inl b/depedencies/include/glm/gtx/integer.inl deleted file mode 100644 index 3a479e6..0000000 --- a/depedencies/include/glm/gtx/integer.inl +++ /dev/null @@ -1,182 +0,0 @@ -/// @ref gtx_integer -/// @file glm/gtx/integer.inl - -namespace glm -{ - // pow - GLM_FUNC_QUALIFIER int pow(int x, int y) - { - if(y == 0) - return 1; - int result = x; - for(int i = 1; i < y; ++i) - result *= x; - return result; - } - - // sqrt: From Christopher J. Musial, An integer square root, Graphics Gems, 1990, page 387 - GLM_FUNC_QUALIFIER int sqrt(int x) - { - if(x <= 1) return x; - - int NextTrial = x >> 1; - int CurrentAnswer; - - do - { - CurrentAnswer = NextTrial; - NextTrial = (NextTrial + x / NextTrial) >> 1; - } while(NextTrial < CurrentAnswer); - - return CurrentAnswer; - } - -// Henry Gordon Dietz: http://aggregate.org/MAGIC/ -namespace detail -{ - GLM_FUNC_QUALIFIER unsigned int ones32(unsigned int x) - { - /* 32-bit recursive reduction using SWAR... - but first step is mapping 2-bit values - into sum of 2 1-bit values in sneaky way - */ - x -= ((x >> 1) & 0x55555555); - x = (((x >> 2) & 0x33333333) + (x & 0x33333333)); - x = (((x >> 4) + x) & 0x0f0f0f0f); - x += (x >> 8); - x += (x >> 16); - return(x & 0x0000003f); - } -}//namespace detail - - // Henry Gordon Dietz: http://aggregate.org/MAGIC/ -/* - GLM_FUNC_QUALIFIER unsigned int floor_log2(unsigned int x) - { - x |= (x >> 1); - x |= (x >> 2); - x |= (x >> 4); - x |= (x >> 8); - x |= (x >> 16); - - return _detail::ones32(x) >> 1; - } -*/ - // mod - GLM_FUNC_QUALIFIER int mod(int x, int y) - { - return x - y * (x / y); - } - - // factorial (!12 max, integer only) - template <typename genType> - GLM_FUNC_QUALIFIER genType factorial(genType const & x) - { - genType Temp = x; - genType Result; - for(Result = 1; Temp > 1; --Temp) - Result *= Temp; - return Result; - } - - template <typename T, precision P> - GLM_FUNC_QUALIFIER tvec2<T, P> factorial( - tvec2<T, P> const & x) - { - return tvec2<T, P>( - factorial(x.x), - factorial(x.y)); - } - - template <typename T, precision P> - GLM_FUNC_QUALIFIER tvec3<T, P> factorial( - tvec3<T, P> const & x) - { - return tvec3<T, P>( - factorial(x.x), - factorial(x.y), - factorial(x.z)); - } - - template <typename T, precision P> - GLM_FUNC_QUALIFIER tvec4<T, P> factorial( - tvec4<T, P> const & x) - { - return tvec4<T, P>( - factorial(x.x), - factorial(x.y), - factorial(x.z), - factorial(x.w)); - } - - GLM_FUNC_QUALIFIER uint pow(uint x, uint y) - { - uint result = x; - for(uint i = 1; i < y; ++i) - result *= x; - return result; - } - - GLM_FUNC_QUALIFIER uint sqrt(uint x) - { - if(x <= 1) return x; - - uint NextTrial = x >> 1; - uint CurrentAnswer; - - do - { - CurrentAnswer = NextTrial; - NextTrial = (NextTrial + x / NextTrial) >> 1; - } while(NextTrial < CurrentAnswer); - - return CurrentAnswer; - } - - GLM_FUNC_QUALIFIER uint mod(uint x, uint y) - { - return x - y * (x / y); - } - -#if(GLM_COMPILER & (GLM_COMPILER_VC | GLM_COMPILER_GCC)) - - GLM_FUNC_QUALIFIER unsigned int nlz(unsigned int x) - { - return 31u - findMSB(x); - } - -#else - - // Hackers Delight: http://www.hackersdelight.org/HDcode/nlz.c.txt - GLM_FUNC_QUALIFIER unsigned int nlz(unsigned int x) - { - int y, m, n; - - y = -int(x >> 16); // If left half of x is 0, - m = (y >> 16) & 16; // set n = 16. If left half - n = 16 - m; // is nonzero, set n = 0 and - x = x >> m; // shift x right 16. - // Now x is of the form 0000xxxx. - y = x - 0x100; // If positions 8-15 are 0, - m = (y >> 16) & 8; // add 8 to n and shift x left 8. - n = n + m; - x = x << m; - - y = x - 0x1000; // If positions 12-15 are 0, - m = (y >> 16) & 4; // add 4 to n and shift x left 4. - n = n + m; - x = x << m; - - y = x - 0x4000; // If positions 14-15 are 0, - m = (y >> 16) & 2; // add 2 to n and shift x left 2. - n = n + m; - x = x << m; - - y = x >> 14; // Set y = 0, 1, 2, or 3. - m = y & ~(y >> 1); // Set m = 0, 1, 2, or 2 resp. - return unsigned(n + 2 - m); - } - -#endif//(GLM_COMPILER) - -}//namespace glm |