diff options
Diffstat (limited to 'src/pal/tests/palsuite/c_runtime/atanf')
4 files changed, 162 insertions, 0 deletions
diff --git a/src/pal/tests/palsuite/c_runtime/atanf/CMakeLists.txt b/src/pal/tests/palsuite/c_runtime/atanf/CMakeLists.txt new file mode 100644 index 0000000000..5e1ef7f28b --- /dev/null +++ b/src/pal/tests/palsuite/c_runtime/atanf/CMakeLists.txt @@ -0,0 +1,3 @@ +cmake_minimum_required(VERSION 2.8.12.2) + +add_subdirectory(test1) diff --git a/src/pal/tests/palsuite/c_runtime/atanf/test1/CMakeLists.txt b/src/pal/tests/palsuite/c_runtime/atanf/test1/CMakeLists.txt new file mode 100644 index 0000000000..b71b1cf40c --- /dev/null +++ b/src/pal/tests/palsuite/c_runtime/atanf/test1/CMakeLists.txt @@ -0,0 +1,19 @@ +cmake_minimum_required(VERSION 2.8.12.2) + +set(CMAKE_INCLUDE_CURRENT_DIR ON) + +set(SOURCES + test1.c +) + +add_executable(paltest_atanf_test1 + ${SOURCES} +) + +add_dependencies(paltest_atanf_test1 coreclrpal) + +target_link_libraries(paltest_atanf_test1 + pthread + m + coreclrpal +) diff --git a/src/pal/tests/palsuite/c_runtime/atanf/test1/test1.c b/src/pal/tests/palsuite/c_runtime/atanf/test1/test1.c new file mode 100644 index 0000000000..543a0a8168 --- /dev/null +++ b/src/pal/tests/palsuite/c_runtime/atanf/test1/test1.c @@ -0,0 +1,127 @@ +// Licensed to the .NET Foundation under one or more agreements. +// The .NET Foundation licenses this file to you under the MIT license. +// See the LICENSE file in the project root for more information. + +/*============================================================================= +** +** Source: test1.c +** +** Purpose: Test to ensure that atanf return the correct values +** +** Dependencies: PAL_Initialize +** PAL_Terminate +** Fail +** fabs +** +**===========================================================================*/ + +#include <palsuite.h> + +// binary32 (float) has a machine epsilon of 2^-23 (approx. 1.19e-07). However, this +// is slightly too accurate when writing tests meant to run against libm implementations +// for various platforms. 2^-21 (approx. 4.76e-07) seems to be as accurate as we can get. +// +// The tests themselves will take PAL_EPSILON and adjust it according to the expected result +// so that the delta used for comparison will compare the most significant digits and ignore +// any digits that are outside the double precision range (6-9 digits). + +// For example, a test with an expect result in the format of 0.xxxxxxxxx will use PAL_EPSILON +// for the variance, while an expected result in the format of 0.0xxxxxxxxx will use +// PAL_EPSILON / 10 and and expected result in the format of x.xxxxxx will use PAL_EPSILON * 10. +#define PAL_EPSILON 4.76837158e-07 + +#define PAL_NAN sqrtf(-1.0f) +#define PAL_POSINF -logf(0.0f) +#define PAL_NEGINF logf(0.0f) + +/** + * Helper test structure + */ +struct test +{ + float value; /* value to test the function with */ + float expected; /* expected result */ + float variance; /* maximum delta between the expected and actual result */ +}; + +/** + * validate + * + * test validation function + */ +void __cdecl validate(float value, float expected, float variance) +{ + float result = atanf(value); + + /* + * The test is valid when the difference between result + * and expected is less than or equal to variance + */ + float delta = fabsf(result - expected); + + if (delta > variance) + { + Fail("atanf(%g) returned %10.9g when it should have returned %10.9g", + value, result, expected); + } +} + +/** + * validate + * + * test validation function for values returning NaN + */ +void __cdecl validate_isnan(float value) +{ + float result = atanf(value); + + if (!_isnanf(result)) + { + Fail("atanf(%g) returned %10.9g when it should have returned %10.9g", + value, result, PAL_NAN); + } +} + +/** + * main + * + * executable entry point + */ +int __cdecl main(int argc, char **argv) +{ + struct test tests[] = + { + /* value expected variance */ + { 0, 0, PAL_EPSILON }, + { 0.329514733f, 0.318309886f, PAL_EPSILON }, // expected: 1 / pi + { 0.450549534f, 0.423310825f, PAL_EPSILON }, // expected: pi - e + { 0.463829067f, 0.434294482f, PAL_EPSILON }, // expected: logf10f(e) + { 0.739302950f, 0.636619772f, PAL_EPSILON }, // expected: 2 / pi + { 0.830640878f, 0.693147181f, PAL_EPSILON }, // expected: ln(2) + { 0.854510432f, 0.707106781f, PAL_EPSILON }, // expected: 1 / sqrtf(2) + { 1, 0.785398163f, PAL_EPSILON }, // expected: pi / 4 + { 1.11340715f, 0.839007561f, PAL_EPSILON }, // expected: pi - ln(10) + { 1.55740772f, 1, PAL_EPSILON * 10 }, + { 2.11087684f, 1.12837917f, PAL_EPSILON * 10 }, // expected: 2 / sqrtf(pi) + { 6.33411917f, 1.41421356f, PAL_EPSILON * 10 }, // expected: sqrtf(2) + { 7.76357567f, 1.44269504f, PAL_EPSILON * 10 }, // expected: logf2(e) + { PAL_POSINF, 1.57079633f, PAL_EPSILON * 10 }, // expected: pi / 2 + }; + + /* PAL initialization */ + if (PAL_Initialize(argc, argv) != 0) + { + return FAIL; + } + + for (int i = 0; i < (sizeof(tests) / sizeof(struct test)); i++) + { + validate( tests[i].value, tests[i].expected, tests[i].variance); + validate(-tests[i].value, -tests[i].expected, tests[i].variance); + } + + validate_isnan(PAL_NAN); + + PAL_Terminate(); + return PASS; +} diff --git a/src/pal/tests/palsuite/c_runtime/atanf/test1/testinfo.dat b/src/pal/tests/palsuite/c_runtime/atanf/test1/testinfo.dat new file mode 100644 index 0000000000..0d184272a2 --- /dev/null +++ b/src/pal/tests/palsuite/c_runtime/atanf/test1/testinfo.dat @@ -0,0 +1,13 @@ +# Licensed to the .NET Foundation under one or more agreements. +# The .NET Foundation licenses this file to you under the MIT license. +# See the LICENSE file in the project root for more information. + +Version = 1.0 +Section = C Runtime +Function = atanf +Name = Positive Test for atanf +TYPE = DEFAULT +EXE1 = test1 +Description += Passes a series of values to the atanf() function, += checking each for the expected result. |