[libc-commits] [libc] 233205: adds rsqrtbf16 higher math function for bfloat16 type (PR #235422)

[Kazu Hirata via libc-commits]

================
@@ -0,0 +1,50 @@
+//===-- Utility class to test rsqrt[f|l] ------------------------*- C++ -*-===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_TEST_SRC_MATH_SMOKE_RSQRTTEST_H
+#define LLVM_LIBC_TEST_SRC_MATH_SMOKE_RSQRTTEST_H
+
+#include "test/UnitTest/FEnvSafeTest.h"
+#include "test/UnitTest/FPMatcher.h"
+#include "test/UnitTest/Test.h"
+
+template <typename OutType, typename InType>
+class RsqrtTest : public LIBC_NAMESPACE::testing::FEnvSafeTest {
+
+  DECLARE_SPECIAL_CONSTANTS(OutType)
+
+  struct InConstants {
+    DECLARE_SPECIAL_CONSTANTS(InType)
+  };
+
+  InConstants in;
+
+public:
+  typedef OutType (*RsqrtFunc)(InType);
+
+  void test_special_numbers(RsqrtFunc func) {
+    ASSERT_FP_EQ(in.aNaN, func(in.aNaN));
+    ASSERT_FP_EQ(inf, func(in.zero));
+    ASSERT_FP_EQ(neg_inf, func(in.neg_zero));
+    ASSERT_FP_EQ(zero, func(in.inf));
+    ASSERT_FP_EQ(aNaN, func(in.neg_inf));
+    ASSERT_FP_EQ(aNaN, func(InType(-1.0)));
+    ASSERT_FP_EQ(OutType(1.0), func(InType(1.0)));
+    ASSERT_FP_EQ(OutType(0.5), func(InType(4.0)));
+    ASSERT_FP_EQ(OutType(0.70710677), func(InType(2.0)));
+  }
+};
+
+#define LIST_RSQRT_TESTS(Name, T, func)                                        \
+  using LlvmLibc##Name##Test = RsqrtTest<T, T>;                                \
+  TEST_F(LlvmLibc##Name##Test, SpecialNumbers) {                               \
+    test_special_numbers(&func);                                               \
+  }                                                                            \
+  static_assert(true, "Require semicolon.")
+
+#endif // LLVM_LIBC_TEST_SRC_MATH_SMOKE_RSQRTTEST_H
----------------
kazutakahirata wrote:

Could you add a newline at the end of this file? The missing newline is causing the Linux CI build to fail with `-Werror,-Wnewline-eof`.

https://github.com/llvm/llvm-project/pull/235422