[libc-commits] [libc] [libc] Add sinpif16 function (PR #110994)

[via libc-commits]

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@@ -0,0 +1,43 @@
+//===-- Unittests for sinpif16 --------------------------------------------===//
+//
+// 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 "src/errno/libc_errno.h"
+#include "src/math/sinpif16.h"
+#include "test/UnitTest/FPMatcher.h"
+#include "test/UnitTest/Test.h"
+
+using LlvmLibcSinpif16Test = LIBC_NAMESPACE::testing::FPTest<float16>;
+
+TEST_F(LlvmLibcSinpif16Test, SpecialNumbers) {
+  LIBC_NAMESPACE::libc_errno = 0;
+
+  EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::sinpif16(aNaN));
+  EXPECT_MATH_ERRNO(0);
+
+  EXPECT_FP_EQ(0.0f, LIBC_NAMESPACE::sinpif16(0.0f));
+  EXPECT_MATH_ERRNO(0);
+
+  EXPECT_FP_EQ(-0.0f, LIBC_NAMESPACE::sinpif16(-0.0f));
+  EXPECT_MATH_ERRNO(0);
+
+  EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::sinpif16(inf));
+  EXPECT_MATH_ERRNO(EDOM);
+
+  EXPECT_FP_EQ(aNaN, LIBC_NAMESPACE::sinpif16(neg_inf));
+  EXPECT_MATH_ERRNO(EDOM);
+}
+
+TEST_F(LlvmLibcSinpif16Test, Integers) {
+  EXPECT_FP_EQ(-0.0, LIBC_NAMESPACE::sinpif16(-0x420));
+  EXPECT_FP_EQ(-0.0, LIBC_NAMESPACE::sinpif16(-0x1p+10));
+  EXPECT_FP_EQ(-0.0, LIBC_NAMESPACE::sinpif16(-0x1.4p+14));
+  EXPECT_FP_EQ(0.0, LIBC_NAMESPACE::sinpif16(0x420));
+  EXPECT_FP_EQ(0.0, LIBC_NAMESPACE::sinpif16(0x1.cp+15));
+  EXPECT_FP_EQ(0.0, LIBC_NAMESPACE::sinpif16(0x1.cp+7));
+}
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overmighty wrote:

Nit: `FPTest` defines `zero` and `neg_zero` which you could use instead of `0.0`/`0.0f` and `-0.0`/`-0.0f` literals.

https://github.com/llvm/llvm-project/pull/110994