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Diffstat (limited to 'tests/gtests/blenlib/BLI_math_base_test.cc')
| -rw-r--r-- | tests/gtests/blenlib/BLI_math_base_test.cc | 115 |
1 files changed, 0 insertions, 115 deletions
diff --git a/tests/gtests/blenlib/BLI_math_base_test.cc b/tests/gtests/blenlib/BLI_math_base_test.cc deleted file mode 100644 index dc20c75576d..00000000000 --- a/tests/gtests/blenlib/BLI_math_base_test.cc +++ /dev/null @@ -1,115 +0,0 @@ -/* Apache License, Version 2.0 */ - -#include "testing/testing.h" - -#include "BLI_math.h" - -/* In tests below, when we are using -1.0f as max_diff value, we actually turn the function into a - * pure-ULP one. */ - -/* Put this here, since we cannot use BLI_assert() in inline math files it seems... */ -TEST(math_base, CompareFFRelativeValid) -{ - EXPECT_TRUE(sizeof(float) == sizeof(int)); -} - -TEST(math_base, CompareFFRelativeNormal) -{ - float f1 = 1.99999988f; /* *(float *)&(*(int *)&f2 - 1) */ - float f2 = 2.00000000f; - float f3 = 2.00000048f; /* *(float *)&(*(int *)&f2 + 2) */ - float f4 = 2.10000000f; /* *(float *)&(*(int *)&f2 + 419430) */ - - const float max_diff = FLT_EPSILON * 0.1f; - - EXPECT_TRUE(compare_ff_relative(f1, f2, max_diff, 1)); - EXPECT_TRUE(compare_ff_relative(f2, f1, max_diff, 1)); - - EXPECT_TRUE(compare_ff_relative(f3, f2, max_diff, 2)); - EXPECT_TRUE(compare_ff_relative(f2, f3, max_diff, 2)); - - EXPECT_FALSE(compare_ff_relative(f3, f2, max_diff, 1)); - EXPECT_FALSE(compare_ff_relative(f2, f3, max_diff, 1)); - - EXPECT_FALSE(compare_ff_relative(f3, f2, -1.0f, 1)); - EXPECT_FALSE(compare_ff_relative(f2, f3, -1.0f, 1)); - - EXPECT_TRUE(compare_ff_relative(f3, f2, -1.0f, 2)); - EXPECT_TRUE(compare_ff_relative(f2, f3, -1.0f, 2)); - - EXPECT_FALSE(compare_ff_relative(f4, f2, max_diff, 64)); - EXPECT_FALSE(compare_ff_relative(f2, f4, max_diff, 64)); - - EXPECT_TRUE(compare_ff_relative(f1, f3, max_diff, 64)); - EXPECT_TRUE(compare_ff_relative(f3, f1, max_diff, 64)); -} - -TEST(math_base, CompareFFRelativeZero) -{ - float f0 = 0.0f; - float f1 = 4.2038954e-045f; /* *(float *)&(*(int *)&f0 + 3) */ - - float fn0 = -0.0f; - float fn1 = -2.8025969e-045f; /* *(float *)&(*(int *)&fn0 - 2) */ - - const float max_diff = FLT_EPSILON * 0.1f; - - EXPECT_TRUE(compare_ff_relative(f0, f1, -1.0f, 3)); - EXPECT_TRUE(compare_ff_relative(f1, f0, -1.0f, 3)); - - EXPECT_FALSE(compare_ff_relative(f0, f1, -1.0f, 1)); - EXPECT_FALSE(compare_ff_relative(f1, f0, -1.0f, 1)); - - EXPECT_TRUE(compare_ff_relative(fn0, fn1, -1.0f, 8)); - EXPECT_TRUE(compare_ff_relative(fn1, fn0, -1.0f, 8)); - - EXPECT_TRUE(compare_ff_relative(f0, f1, max_diff, 1)); - EXPECT_TRUE(compare_ff_relative(f1, f0, max_diff, 1)); - - EXPECT_TRUE(compare_ff_relative(fn0, f0, max_diff, 1)); - EXPECT_TRUE(compare_ff_relative(f0, fn0, max_diff, 1)); - - EXPECT_TRUE(compare_ff_relative(f0, fn1, max_diff, 1)); - EXPECT_TRUE(compare_ff_relative(fn1, f0, max_diff, 1)); - - /* Note: in theory, this should return false, since 0.0f and -0.0f have 0x80000000 diff, - * but overflow in subtraction seems to break something here - * (abs(*(int *)&fn0 - *(int *)&f0) == 0x80000000 == fn0), probably because int32 cannot - * hold this abs value. this is yet another illustration of why one shall never use (near-)zero - * floats in pure-ULP comparison. */ - // EXPECT_FALSE(compare_ff_relative(fn0, f0, -1.0f, 1024)); - // EXPECT_FALSE(compare_ff_relative(f0, fn0, -1.0f, 1024)); - - EXPECT_FALSE(compare_ff_relative(fn0, f1, -1.0f, 1024)); - EXPECT_FALSE(compare_ff_relative(f1, fn0, -1.0f, 1024)); -} - -TEST(math_base, Log2FloorU) -{ - EXPECT_EQ(log2_floor_u(0), 0); - EXPECT_EQ(log2_floor_u(1), 0); - EXPECT_EQ(log2_floor_u(2), 1); - EXPECT_EQ(log2_floor_u(3), 1); - EXPECT_EQ(log2_floor_u(4), 2); - EXPECT_EQ(log2_floor_u(5), 2); - EXPECT_EQ(log2_floor_u(6), 2); - EXPECT_EQ(log2_floor_u(7), 2); - EXPECT_EQ(log2_floor_u(8), 3); - EXPECT_EQ(log2_floor_u(9), 3); - EXPECT_EQ(log2_floor_u(123456), 16); -} - -TEST(math_base, Log2CeilU) -{ - EXPECT_EQ(log2_ceil_u(0), 0); - EXPECT_EQ(log2_ceil_u(1), 0); - EXPECT_EQ(log2_ceil_u(2), 1); - EXPECT_EQ(log2_ceil_u(3), 2); - EXPECT_EQ(log2_ceil_u(4), 2); - EXPECT_EQ(log2_ceil_u(5), 3); - EXPECT_EQ(log2_ceil_u(6), 3); - EXPECT_EQ(log2_ceil_u(7), 3); - EXPECT_EQ(log2_ceil_u(8), 3); - EXPECT_EQ(log2_ceil_u(9), 4); - EXPECT_EQ(log2_ceil_u(123456), 17); -} |