[libc-commits] [libc] [llvm] [libc][math][c23] Add sinhbf16 function (PR #224645)

[via libc-commits]

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@@ -0,0 +1,111 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// This file contains the implementation of sinhbf16.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_SRC___SUPPORT_MATH_SINHBF16_H
+#define LLVM_LIBC_SRC___SUPPORT_MATH_SINHBF16_H
+
+#include "sinhbf16coshbf16_utils.h"
+#include "src/__support/FPUtil/FEnvImpl.h"
+#include "src/__support/FPUtil/FPBits.h"
+#include "src/__support/FPUtil/bfloat16.h"
+#include "src/__support/FPUtil/cast.h"
+#include "src/__support/macros/attributes.h"
+#include "src/__support/macros/config.h"
+#include "src/__support/macros/optimization.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+namespace math {
+
+LIBC_INLINE bfloat16 sinhbf16(bfloat16 x) {
+  using FPBits = fputil::FPBits<bfloat16>;
+  FPBits x_bits(x);
+  uint16_t x_u = x_bits.uintval();
+  uint16_t x_abs = x_u & 0x7fff;
+
+  // |x| <= 0.11328125
+  if (x_abs <= 0x3de8) {
+    if (x_abs == 0U)
+      return x;
+
+#ifndef LIBC_MATH_HAS_ASSUME_ROUND_NEAREST_ONLY
+    if (x_u & 0x8000) {
+      if (fputil::fenv_is_round_down())
+        return FPBits(static_cast<uint16_t>(x_u + 1)).get_val();
+    } else {
+      if (fputil::fenv_is_round_up())
+        return FPBits(static_cast<uint16_t>(x_u + 1)).get_val();
+    }
+#endif
+    return FPBits(static_cast<uint16_t>(x_u)).get_val();
+  }
+
+  // |x| >= 89.5
+  if (LIBC_UNLIKELY(x_abs >= 0x42b3)) {
+
+    // sinh(inf) = inf
+    if (x_bits.is_inf())
+      return x;
+
+    // sinh(NaN) = NaN
+    if (x_bits.is_nan()) {
+      if (x_bits.is_signaling_nan()) {
+        fputil::raise_except_if_required(FE_INVALID);
+        return FPBits::quiet_nan().get_val();
+      }
+      return x;
+    }
+
+#ifndef LIBC_MATH_HAS_ASSUME_ROUND_NEAREST_ONLY
+    int rounding = fputil::quick_get_round();
+    if (x_bits.is_neg()) {
+      if (LIBC_UNLIKELY(rounding == FE_UPWARD || rounding == FE_TOWARDZERO))
+        return -FPBits::max_normal().get_val();
+    } else {
+      if (LIBC_UNLIKELY(rounding == FE_DOWNWARD || rounding == FE_TOWARDZERO))
+        return FPBits::max_normal().get_val();
+    }
+#endif // !LIBC_MATH_HAS_ASSUME_ROUND_NEAREST_ONLY
+
+    fputil::set_errno_if_required(ERANGE);
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lntue wrote:

I think you missed `"hdr/errno_macros.h"` inclusion.

https://github.com/llvm/llvm-project/pull/224645