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65 lines
1.2 KiB
65 lines
1.2 KiB
#define GLM_ENABLE_EXPERIMENTAL |
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#include <glm/exponential.hpp> |
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#include <glm/gtc/epsilon.hpp> |
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#include <glm/gtx/integer.hpp> |
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#include <cstdio> |
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/* |
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int test_floor_log2() |
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{ |
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int Error = 0; |
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for(std::size_t i = 1; i < 1000000; ++i) |
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{ |
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glm::uint A = glm::floor_log2(glm::uint(i)); |
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glm::uint B = glm::uint(glm::floor(glm::log2(double(i)))); // Will fail with float, lack of accuracy |
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Error += A == B ? 0 : 1; |
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assert(!Error); |
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} |
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return Error; |
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} |
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*/ |
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int test_log2() |
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{ |
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int Error = 0; |
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for(std::size_t i = 1; i < 24; ++i) |
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{ |
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glm::uint A = glm::log2(glm::uint(1 << i)); |
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glm::uint B = glm::uint(glm::log2(double(1 << i))); |
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//Error += glm::equalEpsilon(double(A), B, 1.0) ? 0 : 1; |
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Error += glm::abs(double(A) - B) <= 24 ? 0 : 1; |
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assert(!Error); |
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printf("Log2(%d) error A=%d, B=%d\n", 1 << i, A, B); |
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} |
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printf("log2 error=%d\n", Error); |
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return Error; |
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} |
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int test_nlz() |
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{ |
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int Error = 0; |
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for(glm::uint i = 1; i < glm::uint(33); ++i) |
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Error += glm::nlz(i) == glm::uint(31u) - glm::findMSB(i) ? 0 : 1; |
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//printf("%d, %d\n", glm::nlz(i), 31u - glm::findMSB(i)); |
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return Error; |
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} |
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int main() |
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{ |
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int Error = 0; |
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Error += test_nlz(); |
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// Error += test_floor_log2(); |
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Error += test_log2(); |
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return Error; |
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} |
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