diff options
Diffstat (limited to 'src/pal/tests/palsuite/c_runtime/expf/test1')
3 files changed, 168 insertions, 0 deletions
diff --git a/src/pal/tests/palsuite/c_runtime/expf/test1/CMakeLists.txt b/src/pal/tests/palsuite/c_runtime/expf/test1/CMakeLists.txt new file mode 100644 index 0000000000..fb12b65c2f --- /dev/null +++ b/src/pal/tests/palsuite/c_runtime/expf/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_expf_test1 + ${SOURCES} +) + +add_dependencies(paltest_expf_test1 coreclrpal) + +target_link_libraries(paltest_expf_test1 + pthread + m + coreclrpal +) diff --git a/src/pal/tests/palsuite/c_runtime/expf/test1/test1.c b/src/pal/tests/palsuite/c_runtime/expf/test1/test1.c new file mode 100644 index 0000000000..32f4e8d26c --- /dev/null +++ b/src/pal/tests/palsuite/c_runtime/expf/test1/test1.c @@ -0,0 +1,137 @@ +// 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: Tests expf with a normal set of values. +** +**===================================================================*/ + +#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 = expf(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("expf(%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 = expf(value); + + if (!_isnanf(result)) + { + Fail("expf(%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 */ + { PAL_NEGINF, 0, PAL_EPSILON }, + { -3.14159265f, 0.0432139183f, PAL_EPSILON / 10 }, // value: -(pi) + { -2.71828183f, 0.0659880358f, PAL_EPSILON / 10 }, // value: -(e) + { -2.30258509f, 0.1f, PAL_EPSILON }, // value: -(ln(10)) + { -1.57079633f, 0.207879576f, PAL_EPSILON }, // value: -(pi / 2) + { -1.44269504f, 0.236290088f, PAL_EPSILON }, // value: -(logf2(e)) + { -1.41421356f, 0.243116734f, PAL_EPSILON }, // value: -(sqrtf(2)) + { -1.12837917f, 0.323557264f, PAL_EPSILON }, // value: -(2 / sqrtf(pi)) + { -1, 0.367879441f, PAL_EPSILON }, // value: -(1) + { -0.785398163f, 0.455938128f, PAL_EPSILON }, // value: -(pi / 4) + { -0.707106781f, 0.493068691f, PAL_EPSILON }, // value: -(1 / sqrtf(2)) + { -0.693147181f, 0.5f, PAL_EPSILON }, // value: -(ln(2)) + { -0.636619772f, 0.529077808f, PAL_EPSILON }, // value: -(2 / pi) + { -0.434294482f, 0.647721485f, PAL_EPSILON }, // value: -(log10f(e)) + { -0.318309886f, 0.727377349f, PAL_EPSILON }, // value: -(1 / pi) + { 0, 1, PAL_EPSILON * 10 }, + { 0.318309886f, 1.37480223f, PAL_EPSILON * 10 }, // value: 1 / pi + { 0.434294482f, 1.54387344f, PAL_EPSILON * 10 }, // value: log10f(e) + { 0.636619772f, 1.89008116f, PAL_EPSILON * 10 }, // value: 2 / pi + { 0.693147181f, 2, PAL_EPSILON * 10 }, // value: ln(2) + { 0.707106781f, 2.02811498f, PAL_EPSILON * 10 }, // value: 1 / sqrtf(2) + { 0.785398163f, 2.19328005f, PAL_EPSILON * 10 }, // value: pi / 4 + { 1, 2.71828183f, PAL_EPSILON * 10 }, // expected: e + { 1.12837917f, 3.09064302f, PAL_EPSILON * 10 }, // value: 2 / sqrtf(pi) + { 1.41421356f, 4.11325038f, PAL_EPSILON * 10 }, // value: sqrtf(2) + { 1.44269504f, 4.23208611f, PAL_EPSILON * 10 }, // value: logf2(e) + { 1.57079633f, 4.81047738f, PAL_EPSILON * 10 }, // value: pi / 2 + { 2.30258509f, 10, PAL_EPSILON * 100 }, // value: ln(10) + { 2.71828183f, 15.1542622f, PAL_EPSILON * 100 }, // value: e + { 3.14159265f, 23.1406926f, PAL_EPSILON * 100 }, // value: pi + { PAL_POSINF, PAL_POSINF, 0 }, + }; + + 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_isnan(PAL_NAN); + + PAL_Terminate(); + return PASS; +} diff --git a/src/pal/tests/palsuite/c_runtime/expf/test1/testinfo.dat b/src/pal/tests/palsuite/c_runtime/expf/test1/testinfo.dat new file mode 100644 index 0000000000..c35928501e --- /dev/null +++ b/src/pal/tests/palsuite/c_runtime/expf/test1/testinfo.dat @@ -0,0 +1,12 @@ +# 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 = expf +Name = Test #1 for expf +Type = DEFAULT +EXE1 = test1 +Description +=Tests expf with a normal set of values. |