Imported Upstream version 1.1.0upstream/1.1.0

4 files changed, 166 insertions, 0 deletions

diff --git a/src/pal/tests/palsuite/c_runtime/acos/CMakeLists.txt b/src/pal/tests/palsuite/c_runtime/acos/CMakeLists.txt
new file mode 100644
index 0000000000..5e1ef7f28b
--- /dev/null
+++ b/src/pal/tests/palsuite/c_runtime/acos/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/acos/test1/CMakeLists.txt b/src/pal/tests/palsuite/c_runtime/acos/test1/CMakeLists.txt
new file mode 100644
index 0000000000..978ab427e8
--- /dev/null
+++ b/src/pal/tests/palsuite/c_runtime/acos/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_acos_test1
+  ${SOURCES}
+)
+
+add_dependencies(paltest_acos_test1 coreclrpal)
+
+target_link_libraries(paltest_acos_test1
+  pthread
+  m
+  coreclrpal
+)
diff --git a/src/pal/tests/palsuite/c_runtime/acos/test1/test1.c b/src/pal/tests/palsuite/c_runtime/acos/test1/test1.c
new file mode 100644
index 0000000000..c6ed0692c7
--- /dev/null
+++ b/src/pal/tests/palsuite/c_runtime/acos/test1/test1.c
@@ -0,0 +1,130 @@
+// 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 acos return the correct values
+** 
+** Dependencies: PAL_Initialize
+**               PAL_Terminate
+**               Fail
+**               fabs
+**
+**===========================================================================*/
+
+#include <palsuite.h>
+
+// binary64 (double) has a machine epsilon of 2^-52 (approx. 2.22e-16). However, this 
+// is slightly too accurate when writing tests meant to run against libm implementations
+// for various platforms. 2^-50 (approx. 8.88e-16) 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 (15-17 digits).
+
+// For example, a test with an expect result in the format of 0.xxxxxxxxxxxxxxxxx will use
+// PAL_EPSILON for the variance, while an expected result in the format of 0.0xxxxxxxxxxxxxxxxx
+// will use PAL_EPSILON / 10 and and expected result in the format of x.xxxxxxxxxxxxxxxx will
+// use PAL_EPSILON * 10.
+#define PAL_EPSILON 8.8817841970012523e-16
+
+#define PAL_NAN     sqrt(-1.0)
+#define PAL_POSINF -log(0.0)
+#define PAL_NEGINF  log(0.0)
+
+/**
+ * Helper test structure
+ */
+struct test
+{
+    double value;     /* value to test the function with */
+    double expected;  /* expected result */
+    double variance;  /* maximum delta between the expected and actual result */
+};
+
+/**
+ * validate
+ *
+ * test validation function
+ */
+void __cdecl validate(double value, double expected, double variance)
+{
+    double result = acos(value);
+
+    /*
+     * The test is valid when the difference between result
+     * and expected is less than or equal to variance
+     */
+    double delta = fabs(result - expected);
+
+    if (delta > variance)
+    {
+        Fail("acos(%g) returned %20.17g when it should have returned %20.17g",
+             value, result, expected);
+    }
+}
+
+/**
+ * validate
+ *
+ * test validation function for values returning NaN
+ */
+void __cdecl validate_isnan(double value)
+{
+    double result = acos(value);
+
+    if (!_isnan(result))
+    {
+        Fail("acos(%g) returned %20.17g when it should have returned %20.17g",
+             value, result, PAL_NAN);
+    }
+}
+
+/**
+ * main
+ * 
+ * executable entry point
+ */
+int __cdecl main(int argc, char **argv)
+{
+    struct test tests[] = 
+    {
+        /* value                   expected                variance */
+        { -1,                      3.1415926535897932,     PAL_EPSILON * 10 },      // expected:  pi
+        { -0.91173391478696510,    2.7182818284590452,     PAL_EPSILON * 10 },      // expected:  e
+        { -0.66820151019031295,    2.3025850929940457,     PAL_EPSILON * 10 },      // expected:  ln(10)
+        {  0,                      1.5707963267948966,     PAL_EPSILON * 10 },      // expected:  pi / 2
+        {  0.12775121753523991,    1.4426950408889634,     PAL_EPSILON * 10 },      // expected:  log2(e)
+        {  0.15594369476537447,    1.4142135623730950,     PAL_EPSILON * 10 },      // expected:  sqrt(2)
+        {  0.42812514788535792,    1.1283791670955126,     PAL_EPSILON * 10 },      // expected:  2 / sqrt(pi)
+        {  0.54030230586813972,    1,                      PAL_EPSILON * 10 },
+        {  0.70710678118654752,    0.78539816339744831,    PAL_EPSILON },           // expected:  pi / 4,         value:  1 / sqrt(2)
+        {  0.76024459707563015,    0.70710678118654752,    PAL_EPSILON },           // expected:  1 / sqrt(2)
+        {  0.76923890136397213,    0.69314718055994531,    PAL_EPSILON },           // expected:  ln(2)
+        {  0.80410982822879171,    0.63661977236758134,    PAL_EPSILON },           // expected:  2 / pi
+        {  0.90716712923909839,    0.43429448190325183,    PAL_EPSILON },           // expected:  log10(e)
+        {  0.94976571538163866,    0.31830988618379067,    PAL_EPSILON },           // expected:  1 / pi
+        {  1,                      0,                      PAL_EPSILON },
+    };
+
+    /* 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_isnan(PAL_NEGINF);
+    validate_isnan(PAL_NAN);
+    validate_isnan(PAL_POSINF);
+
+    PAL_Terminate();
+    return PASS;
+}
diff --git a/src/pal/tests/palsuite/c_runtime/acos/test1/testinfo.dat b/src/pal/tests/palsuite/c_runtime/acos/test1/testinfo.dat
new file mode 100644
index 0000000000..4b43982fca
--- /dev/null
+++ b/src/pal/tests/palsuite/c_runtime/acos/test1/testinfo.dat
@@ -0,0 +1,14 @@
+# 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 = acos
+Name = Positive Test for acos
+TYPE = DEFAULT
+EXE1 = test1
+Description
+= Passes a series of values to the acos() function,
+= checking each for the expected result. Also checks
+= for proper handling of out-of-range values.