[libc-commits] [libc] Add sinf16 function (PR #116674)

[via libc-commits]

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@@ -0,0 +1,107 @@
+//===-- Half-precision sin(x) function ------------------------------------===//
+//
+// 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/math/sinf16.h"
+#include "hdr/errno_macros.h"
+#include "hdr/fenv_macros.h"
+#include "sincosf16_utils.h"
+#include "src/__support/FPUtil/FEnvImpl.h"
+#include "src/__support/FPUtil/FPBits.h"
+#include "src/__support/FPUtil/cast.h"
+#include "src/__support/FPUtil/except_value_utils.h"
+#include "src/__support/FPUtil/multiply_add.h"
+#include "src/__support/macros/optimization.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+constexpr size_t N_EXCEPTS = 3;
+
+constexpr fputil::ExceptValues<float16, N_EXCEPTS> SINF16_EXCEPTS{{
+    // (input, RZ output, RU offset, RD offset, RN offset)
+    {0x585c, 0x3ba3, 1, 0, 1},
+    {0x5cb0, 0xbbff, 0, 1, 0},
+    {0x51f5, 0xb80f, 0, 1, 0},
+}};
+
+LLVM_LIBC_FUNCTION(float16, sinf16, (float16 x)) {
+  using FPBits = typename fputil::FPBits<float16>;
----------------
overmighty wrote:

`typename` is redundant here.

```suggestion
  using FPBits = fputil::FPBits<float16>;
```

https://github.com/llvm/llvm-project/pull/116674