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Updated naming conventions

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This commit is contained in:
Christophe Riccio 2011-05-04 10:21:25 +01:00
parent 7a1cc47897
commit 58d2d282f2
2 changed files with 82 additions and 44 deletions
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6
glm/gtx/ulp.inl
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@ -23,7 +23,7 @@ namespace ulp
std::size_t Count = 0; std::size_t Count = 0;
float TempA(a); float TempA(a);
float TempB(b); float TempB(b);
while((TempA = _nextafterf(TempA, TempB)) != TempB) //while((TempA = _nextafterf(TempA, TempB)) != TempB)
++Count; ++Count;
return Count; return Count;
} }
@ -36,7 +36,7 @@ namespace ulp
{ {
std::size_t Count = 0; std::size_t Count = 0;
float Temp = a; float Temp = a;
while((Temp = _nextafterf(Temp, b)) != b) //while((Temp = _nextafterf(Temp, b)) != b)
{ {
std::cout << Temp << " " << b << std::endl; std::cout << Temp << " " << b << std::endl;
++Count; ++Count;
@ -52,7 +52,7 @@ namespace ulp
{ {
std::size_t Count = 0; std::size_t Count = 0;
double Temp = a; double Temp = a;
while((Temp = _nextafter(Temp, b)) != b) //while((Temp = _nextafter(Temp, b)) != b)
{ {
std::cout << Temp << " " << b << std::endl; std::cout << Temp << " " << b << std::endl;
++Count; ++Count;

112
test/gtx/gtx-ulp.cpp
View File

@ -15,52 +15,81 @@
namespace namespace
{ {
template <typename T> template <typename T>
T next(T const & x); T next_float(T const & x);
#if(GLM_COMPILER & GLM_COMPILER_VC) #if(GLM_COMPILER & GLM_COMPILER_VC)
# include <cfloat> # include <cfloat>
GLM_FUNC_QUALIFIER float next(float const & x) # define GLM_NEXT_AFTER _nextafterf
{
return _nextafterf(x, std::numeric_limits<float>::max());
}
GLM_FUNC_QUALIFIER double next(double const & x)
{
return _nextafter(x, std::numeric_limits<double>::max());
}
#else #else
# include <cmath> # include <cmath>
GLM_FUNC_QUALIFIER float next(float const & x) # define GLM_NEXT_AFTER nextafterf
{
return nextafterf(x, std::numeric_limits<float>::max());
}
GLM_FUNC_QUALIFIER double next(double const & x)
{
return nextafter(x, std::numeric_limits<double>::max());
}
#endif #endif
GLM_FUNC_QUALIFIER float next_float(float const & x)
{
return GLM_NEXT_AFTER(x, std::numeric_limits<float>::max());
}
GLM_FUNC_QUALIFIER double next_float(double const & x)
{
return GLM_NEXT_AFTER(x, std::numeric_limits<double>::max());
}
GLM_FUNC_QUALIFIER float prev_float(float const & x)
{
return GLM_NEXT_AFTER(x, std::numeric_limits<float>::min());
}
GLM_FUNC_QUALIFIER double prev_float(double const & x)
{
return GLM_NEXT_AFTER(x, std::numeric_limits<double>::min());
}
template <typename T> template <typename T>
GLM_FUNC_QUALIFIER T next(T const & x, std::size_t const & Steps) GLM_FUNC_QUALIFIER T next_float(T const & x, std::size_t const & ulps)
{ {
T temp = x; T temp = x;
for(std::size_t i = 0; i < Steps; ++i) for(std::size_t i = 0; i < ulps; ++i)
temp = next(temp); temp = next_float(temp);
return temp; return temp;
} }
template <typename T> template <typename T>
GLM_FUNC_QUALIFIER std::size_t ulp_distance(T const & x, T const & y) GLM_FUNC_QUALIFIER T prev_float(T const & x, std::size_t const & ulps)
{ {
std::size_t ulp = 0;
T temp = x; T temp = x;
for(std::size_t i = 0; i < ulps; ++i)
temp = prev_float(temp);
return temp;
}
while(temp != y) template <typename T>
{ GLM_FUNC_QUALIFIER std::size_t float_distance(T const & x, T const & y)
++ulp; {
temp = next(temp); std::size_t ulp = 0;
}
if(x < y)
{
T temp = x;
while(temp != y && ulp < std::numeric_limits<std::size_t>::max())
{
++ulp;
temp = next_float(temp);
}
}
else if(y < x)
{
T temp = y;
while(temp != x && ulp < std::numeric_limits<std::size_t>::max())
{
++ulp;
temp = next_float(temp);
}
}
else // ==
{
}
return ulp; return ulp;
} }
@ -71,18 +100,27 @@ int test_ulp_float()
std::cout.precision(std::numeric_limits<double>::digits10 + 1); std::cout.precision(std::numeric_limits<double>::digits10 + 1);
float W = 1.0f; float W = 1.0f;
float X = next(W); float X = next_float(W);
bool TestX = W != X;
std::cout << " 1.0f, Next: " << ulp_distance(W, X)<< std::endl;
std::cout << " 1.0f, Nextt(1000): " << next(W, 1000)<< std::endl;
//std::cout << " 0.01, 0.011: " << ulp_distance(0.00000000001f, 0.000000000011f) << std::endl;
//std::cout << " 0.01, 0.011: " << ulp_distance(0.00000000001, 0.000000000011) << std::endl;
double Y = 1.0; double Y = 1.0;
double Z = next(Y); double Z = next_float(Y);
bool TestX = W != X;
bool TestZ = Y != Z; bool TestZ = Y != Z;
std::cout << "1.0f, Next: " << float_distance(W, X)<< std::endl;
std::cout << "1.0f, Next(1000): " << float_distance(W, next_float(W, 1000)) << std::endl;
std::cout << "1.0f, Next: " << float_distance(X, W)<< std::endl;
std::cout << "1.0f, Next(1000): " << float_distance(next_float(W, 1000), W) << std::endl;
std::cout << "1.0, Next: " << float_distance(Y, Z) << std::endl;
std::cout << "1.0, Next(1000): " << float_distance(next_float(Y, 1000), Y) << std::endl;
std::cout << Z << " 0.01, 0.011" << std::endl; std::cout << Z << " 0.01, 0.011" << std::endl;
std::cout << " 1.0, Next(1000000): " << next(Y, 1000000)<< std::endl; std::cout << " 1.0, Next(1000000): " << next_float(Y, 1000000)<< std::endl;
std::size_t A = glm::ulp(0.01, 0.02); std::size_t A = glm::ulp(0.01, 0.02);
std::size_t B = glm::ulp(glm::vec2(0.01), glm::vec2(0.02)); std::size_t B = glm::ulp(glm::vec2(0.01), glm::vec2(0.02));