mirror of
https://github.com/g-truc/glm.git
synced 2024-11-15 06:24:34 +00:00
468 lines
9.2 KiB
C++
468 lines
9.2 KiB
C++
#include <glm/gtc/round.hpp>
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#include <glm/gtc/type_precision.hpp>
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#include <glm/gtc/vec1.hpp>
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#include <glm/gtc/epsilon.hpp>
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#include <vector>
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#include <ctime>
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#include <cstdio>
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namespace isPowerOfTwo
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{
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#if GLM_COMPILER & GLM_COMPILER_CLANG
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# pragma clang diagnostic push
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# pragma clang diagnostic ignored "-Wpadded"
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#endif
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template<typename genType>
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struct type
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{
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genType Value;
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bool Return;
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};
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#if GLM_COMPILER & GLM_COMPILER_CLANG
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# pragma clang diagnostic pop
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#endif
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static int test_int16()
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{
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type<glm::int16> const Data[] =
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{
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{0x0001, true},
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{0x0002, true},
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{0x0004, true},
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{0x0080, true},
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{0x0000, true},
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{0x0003, false}
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};
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int Error(0);
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for(std::size_t i = 0, n = sizeof(Data) / sizeof(type<glm::int16>); i < n; ++i)
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{
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bool Result = glm::isPowerOfTwo(Data[i].Value);
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Error += Data[i].Return == Result ? 0 : 1;
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}
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return Error;
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}
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static int test_uint16()
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{
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type<glm::uint16> const Data[] =
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{
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{0x0001, true},
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{0x0002, true},
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{0x0004, true},
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{0x0000, true},
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{0x0000, true},
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{0x0003, false}
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};
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int Error(0);
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for(std::size_t i = 0, n = sizeof(Data) / sizeof(type<glm::uint16>); i < n; ++i)
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{
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bool Result = glm::isPowerOfTwo(Data[i].Value);
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Error += Data[i].Return == Result ? 0 : 1;
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}
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return Error;
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}
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static int test_int32()
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{
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type<int> const Data[] =
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{
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{0x00000001, true},
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{0x00000002, true},
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{0x00000004, true},
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{0x0000000f, false},
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{0x00000000, true},
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{0x00000003, false}
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};
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int Error(0);
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for(std::size_t i = 0, n = sizeof(Data) / sizeof(type<int>); i < n; ++i)
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{
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bool Result = glm::isPowerOfTwo(Data[i].Value);
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Error += Data[i].Return == Result ? 0 : 1;
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}
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for(std::size_t i = 0, n = sizeof(Data) / sizeof(type<int>); i < n; ++i)
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{
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glm::bvec1 Result = glm::isPowerOfTwo(glm::ivec1(Data[i].Value));
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Error += glm::all(glm::equal(glm::bvec1(Data[i].Return), Result)) ? 0 : 1;
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}
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for(std::size_t i = 0, n = sizeof(Data) / sizeof(type<int>); i < n; ++i)
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{
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glm::bvec2 Result = glm::isPowerOfTwo(glm::ivec2(Data[i].Value));
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Error += glm::all(glm::equal(glm::bvec2(Data[i].Return), Result)) ? 0 : 1;
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}
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for(std::size_t i = 0, n = sizeof(Data) / sizeof(type<int>); i < n; ++i)
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{
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glm::bvec3 Result = glm::isPowerOfTwo(glm::ivec3(Data[i].Value));
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Error += glm::all(glm::equal(glm::bvec3(Data[i].Return), Result)) ? 0 : 1;
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}
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for(std::size_t i = 0, n = sizeof(Data) / sizeof(type<int>); i < n; ++i)
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{
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glm::bvec4 Result = glm::isPowerOfTwo(glm::ivec4(Data[i].Value));
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Error += glm::all(glm::equal(glm::bvec4(Data[i].Return), Result)) ? 0 : 1;
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}
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return Error;
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}
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static int test_uint32()
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{
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type<glm::uint> const Data[] =
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{
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{0x00000001, true},
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{0x00000002, true},
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{0x00000004, true},
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{0x80000000, true},
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{0x00000000, true},
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{0x00000003, false}
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};
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int Error(0);
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for(std::size_t i = 0, n = sizeof(Data) / sizeof(type<glm::uint>); i < n; ++i)
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{
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bool Result = glm::isPowerOfTwo(Data[i].Value);
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Error += Data[i].Return == Result ? 0 : 1;
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}
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return Error;
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}
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static int test()
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{
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int Error(0);
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Error += test_int16();
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Error += test_uint16();
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Error += test_int32();
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Error += test_uint32();
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return Error;
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}
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}//isPowerOfTwo
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namespace ceilPowerOfTwo_advanced
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{
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template<typename genIUType>
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GLM_FUNC_QUALIFIER
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static genIUType highestBitValue(genIUType Value)
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{
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genIUType tmp = Value;
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genIUType result = genIUType(0);
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while(tmp)
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{
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result = (tmp & (~tmp + 1)); // grab lowest bit
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tmp &= ~result; // clear lowest bit
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}
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return result;
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}
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template<typename genType>
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GLM_FUNC_QUALIFIER
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static genType ceilPowerOfTwo_loop(genType value)
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{
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return glm::isPowerOfTwo(value) ? value : highestBitValue(value) << 1;
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}
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template<typename genType>
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struct type
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{
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genType Value;
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genType Return;
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};
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static int test_int32()
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{
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type<glm::int32> const Data[] =
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{
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{0x0000ffff, 0x00010000},
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{-3, -4},
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{-8, -8},
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{0x00000001, 0x00000001},
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{0x00000002, 0x00000002},
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{0x00000004, 0x00000004},
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{0x00000007, 0x00000008},
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{0x0000fff0, 0x00010000},
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{0x0000f000, 0x00010000},
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{0x08000000, 0x08000000},
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{0x00000000, 0x00000000},
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{0x00000003, 0x00000004}
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};
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int Error(0);
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for(std::size_t i = 0, n = sizeof(Data) / sizeof(type<glm::int32>); i < n; ++i)
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{
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glm::int32 Result = glm::ceilPowerOfTwo(Data[i].Value);
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Error += Data[i].Return == Result ? 0 : 1;
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}
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return Error;
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}
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static int test_uint32()
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{
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type<glm::uint32> const Data[] =
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{
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{0x00000001, 0x00000001},
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{0x00000002, 0x00000002},
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{0x00000004, 0x00000004},
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{0x00000007, 0x00000008},
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{0x0000ffff, 0x00010000},
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{0x0000fff0, 0x00010000},
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{0x0000f000, 0x00010000},
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{0x80000000, 0x80000000},
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{0x00000000, 0x00000000},
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{0x00000003, 0x00000004}
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};
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int Error(0);
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for(std::size_t i = 0, n = sizeof(Data) / sizeof(type<glm::uint32>); i < n; ++i)
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{
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glm::uint32 Result = glm::ceilPowerOfTwo(Data[i].Value);
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Error += Data[i].Return == Result ? 0 : 1;
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}
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return Error;
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}
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static int perf()
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{
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int Error(0);
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std::vector<glm::uint> v;
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v.resize(100000000);
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std::clock_t Timestramp0 = std::clock();
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for(glm::uint32 i = 0, n = static_cast<glm::uint>(v.size()); i < n; ++i)
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v[i] = ceilPowerOfTwo_loop(i);
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std::clock_t Timestramp1 = std::clock();
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for(glm::uint32 i = 0, n = static_cast<glm::uint>(v.size()); i < n; ++i)
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v[i] = glm::ceilPowerOfTwo(i);
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std::clock_t Timestramp2 = std::clock();
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std::printf("ceilPowerOfTwo_loop: %d clocks\n", static_cast<int>(Timestramp1 - Timestramp0));
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std::printf("glm::ceilPowerOfTwo: %d clocks\n", static_cast<int>(Timestramp2 - Timestramp1));
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return Error;
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}
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static int test()
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{
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int Error(0);
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Error += test_int32();
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Error += test_uint32();
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return Error;
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}
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}//namespace ceilPowerOfTwo_advanced
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namespace roundPowerOfTwo
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{
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static int test()
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{
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int Error = 0;
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glm::uint32 const A = glm::roundPowerOfTwo(7u);
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Error += A == 8u ? 0 : 1;
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glm::uint32 const B = glm::roundPowerOfTwo(15u);
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Error += B == 16u ? 0 : 1;
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glm::uint32 const C = glm::roundPowerOfTwo(31u);
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Error += C == 32u ? 0 : 1;
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glm::uint32 const D = glm::roundPowerOfTwo(9u);
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Error += D == 8u ? 0 : 1;
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glm::uint32 const E = glm::roundPowerOfTwo(17u);
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Error += E == 16u ? 0 : 1;
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glm::uint32 const F = glm::roundPowerOfTwo(33u);
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Error += F == 32u ? 0 : 1;
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return Error;
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}
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}//namespace roundPowerOfTwo
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namespace floorPowerOfTwo
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{
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static int test()
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{
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int Error = 0;
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glm::uint32 const A = glm::floorPowerOfTwo(7u);
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Error += A == 4u ? 0 : 1;
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glm::uint32 const B = glm::floorPowerOfTwo(15u);
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Error += B == 8u ? 0 : 1;
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glm::uint32 const C = glm::floorPowerOfTwo(31u);
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Error += C == 16u ? 0 : 1;
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return Error;
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}
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}//namespace floorPowerOfTwo
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namespace ceilPowerOfTwo
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{
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static int test()
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{
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int Error = 0;
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glm::uint32 const A = glm::ceilPowerOfTwo(7u);
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Error += A == 8u ? 0 : 1;
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glm::uint32 const B = glm::ceilPowerOfTwo(15u);
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Error += B == 16u ? 0 : 1;
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glm::uint32 const C = glm::ceilPowerOfTwo(31u);
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Error += C == 32u ? 0 : 1;
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return Error;
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}
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}//namespace ceilPowerOfTwo
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namespace floorMultiple
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{
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template<typename genType>
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struct type
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{
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genType Source;
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genType Multiple;
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genType Return;
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genType Epsilon;
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};
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static int test_float()
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{
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type<glm::float64> const Data[] =
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{
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{3.4, 0.3, 3.3, 0.0001},
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{-1.4, 0.3, -1.5, 0.0001},
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};
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int Error(0);
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for(std::size_t i = 0, n = sizeof(Data) / sizeof(type<glm::float64>); i < n; ++i)
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{
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glm::float64 Result = glm::floorMultiple(Data[i].Source, Data[i].Multiple);
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Error += glm::epsilonEqual(Data[i].Return, Result, Data[i].Epsilon) ? 0 : 1;
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}
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return Error;
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}
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static int test()
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{
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int Error(0);
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Error += test_float();
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return Error;
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}
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}//namespace floorMultiple
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namespace ceilMultiple
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{
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template<typename genType>
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struct type
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{
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genType Source;
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genType Multiple;
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genType Return;
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genType Epsilon;
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};
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static int test_float()
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{
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type<glm::float64> const Data[] =
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{
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{3.4, 0.3, 3.6, 0.0001},
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{-1.4, 0.3, -1.2, 0.0001},
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};
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int Error(0);
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for(std::size_t i = 0, n = sizeof(Data) / sizeof(type<glm::float64>); i < n; ++i)
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{
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glm::float64 Result = glm::ceilMultiple(Data[i].Source, Data[i].Multiple);
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Error += glm::epsilonEqual(Data[i].Return, Result, Data[i].Epsilon) ? 0 : 1;
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}
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return Error;
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}
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static int test_int()
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{
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type<int> const Data[] =
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{
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{3, 4, 4, 0},
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{7, 4, 8, 0},
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{5, 4, 8, 0},
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{1, 4, 4, 0},
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{1, 3, 3, 0},
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{4, 3, 6, 0},
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{4, 1, 4, 0},
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{1, 1, 1, 0},
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{7, 1, 7, 0},
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};
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int Error(0);
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for(std::size_t i = 0, n = sizeof(Data) / sizeof(type<int>); i < n; ++i)
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{
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int Result = glm::ceilMultiple(Data[i].Source, Data[i].Multiple);
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Error += Data[i].Return == Result ? 0 : 1;
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}
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return Error;
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}
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static int test()
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{
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int Error(0);
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Error += test_int();
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Error += test_float();
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return Error;
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}
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}//namespace ceilMultiple
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int main()
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{
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int Error(0);
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Error += isPowerOfTwo::test();
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Error += floorPowerOfTwo::test();
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Error += roundPowerOfTwo::test();
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Error += ceilPowerOfTwo::test();
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Error += ceilPowerOfTwo_advanced::test();
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Error += ceilPowerOfTwo_advanced::perf();
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Error += floorMultiple::test();
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Error += ceilMultiple::test();
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return Error;
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}
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