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Added constant time ULP distance between float #121

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This commit is contained in:
Christophe Riccio
2018-09-26 12:09:06 +02:00
parent 0f4a597f10
commit 59cae7b5cb
3 changed files with 66 additions and 56 deletions
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28
test/gtc/gtc_ulp.cpp
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@@ -1,5 +1,5 @@
#include <glm/gtc/ulp.hpp>
#include <glm/gtc/epsilon.hpp>
#include <glm/ext/scalar_relational.hpp>
#include <limits>
int test_ulp_float_dist()
@@ -9,9 +9,9 @@ int test_ulp_float_dist()
float A = 1.0f;
float B = glm::next_float(A);
Error += !glm::epsilonEqual(A, B, glm::epsilon<float>()) ? 0 : 1;
Error += glm::notEqual(A, B, 0) ? 0 : 1;
float C = glm::prev_float(B);
Error += glm::epsilonEqual(A, C, glm::epsilon<float>()) ? 0 : 1;
Error += glm::equal(A, C, 0) ? 0 : 1;
int D = glm::float_distance(A, B);
Error += D == 1 ? 0 : 1;
@@ -30,9 +30,9 @@ int test_ulp_float_step()
for(int i = 10; i < 1000; i *= 10)
{
float B = glm::next_float(A, i);
Error += !glm::epsilonEqual(A, B, glm::epsilon<float>()) ? 0 : 1;
Error += glm::notEqual(A, B, 0) ? 0 : 1;
float C = glm::prev_float(B, i);
Error += glm::epsilonEqual(A, C, glm::epsilon<float>()) ? 0 : 1;
Error += glm::equal(A, C, 0) ? 0 : 1;
int D = glm::float_distance(A, B);
Error += D == i ? 0 : 1;
@@ -50,13 +50,13 @@ int test_ulp_double_dist()
double A = 1.0;
double B = glm::next_float(A);
Error += !glm::epsilonEqual(A, B, glm::epsilon<double>()) ? 0 : 1;
Error += glm::notEqual(A, B, 0) ? 0 : 1;
double C = glm::prev_float(B);
Error += glm::epsilonEqual(A, C, glm::epsilon<double>()) ? 0 : 1;
Error += glm::equal(A, C, 0) ? 0 : 1;
int D = glm::float_distance(A, B);
glm::int64 const D = glm::float_distance(A, B);
Error += D == 1 ? 0 : 1;
int E = glm::float_distance(A, C);
glm::int64 const E = glm::float_distance(A, C);
Error += E == 0 ? 0 : 1;
return Error;
@@ -71,13 +71,13 @@ int test_ulp_double_step()
for(int i = 10; i < 1000; i *= 10)
{
double B = glm::next_float(A, i);
Error += !glm::epsilonEqual(A, B, glm::epsilon<double>()) ? 0 : 1;
Error += glm::notEqual(A, B, 0) ? 0 : 1;
double C = glm::prev_float(B, i);
Error += glm::epsilonEqual(A, C, glm::epsilon<double>()) ? 0 : 1;
Error += glm::equal(A, C, 0) ? 0 : 1;
int D = glm::float_distance(A, B);
glm::int64 const D = glm::float_distance(A, B);
Error += D == i ? 0 : 1;
int E = glm::float_distance(A, C);
glm::int64 const E = glm::float_distance(A, C);
Error += E == 0 ? 0 : 1;
}
@@ -87,10 +87,12 @@ int test_ulp_double_step()
int main()
{
int Error = 0;
Error += test_ulp_float_dist();
Error += test_ulp_float_step();
Error += test_ulp_double_dist();
Error += test_ulp_double_step();
return Error;
}