[libc-commits] [libc] [llvm] [libc][math][c23] Add cosbf16 math function (PR #185801)

[Muhammad Bassiouni via libc-commits]

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@@ -0,0 +1,40 @@
+//===-- Unittests for cosbf16 ---------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "hdr/errno_macros.h"
+#include "src/__support/FPUtil/bfloat16.h"
+#include "src/math/cosbf16.h"
+#include "test/UnitTest/FEnvSafeTest.h"
+#include "test/UnitTest/FPMatcher.h"
+#include "test/UnitTest/Test.h"
+
+class LlvmLibcCosBf16Test : public LIBC_NAMESPACE::testing::FEnvSafeTest {
+  DECLARE_SPECIAL_CONSTANTS(bfloat16)
+public:
+  void test_special_numbers() {
+    EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::cosbf16(aNaN));
+    EXPECT_MATH_ERRNO(0);
+
+    EXPECT_FP_EQ_WITH_EXCEPTION_ALL_ROUNDING(
+        aNaN, LIBC_NAMESPACE::cosbf16(sNaN), FE_INVALID);
+    EXPECT_MATH_ERRNO(0);
+
+    EXPECT_FP_EQ_ALL_ROUNDING(bfloat16(1.0), LIBC_NAMESPACE::cosbf16(zero));
+    EXPECT_MATH_ERRNO(0);
+
+    EXPECT_FP_EQ_ALL_ROUNDING(bfloat16(1.0), LIBC_NAMESPACE::cosbf16(neg_zero));
+    EXPECT_MATH_ERRNO(0);
+
+    EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::cosbf16(inf));
+    EXPECT_MATH_ERRNO(EDOM);
+
+    EXPECT_FP_EQ_ALL_ROUNDING(aNaN, LIBC_NAMESPACE::cosbf16(neg_inf));
+    EXPECT_MATH_ERRNO(EDOM);
+  }
+};
+TEST_F(LlvmLibcCosBf16Test, SpecialNumbers) { test_special_numbers(); }
----------------
bassiounix wrote:

```suggestion
};

TEST_F(LlvmLibcCosBf16Test, SpecialNumbers) { test_special_numbers(); }
```

https://github.com/llvm/llvm-project/pull/185801