[libc-commits] [libc] [llvm] [libc][math] Add tgammabf16 math support for bfloat16. (PR #208689)

[via libc-commits]

================
@@ -0,0 +1,240 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+/// Implementation of the bfloat16 tgamma function.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_SRC___SUPPORT_MATH_TGAMMABF16_H
+#define LLVM_LIBC_SRC___SUPPORT_MATH_TGAMMABF16_H
+
+#include "hdr/errno_macros.h"
+#include "hdr/fenv_macros.h"
+#include "src/__support/FPUtil/FEnvImpl.h"
+#include "src/__support/FPUtil/FPBits.h"
+#include "src/__support/FPUtil/PolyEval.h"
+#include "src/__support/FPUtil/bfloat16.h"
+#include "src/__support/FPUtil/cast.h"
+#include "src/__support/FPUtil/multiply_add.h"
+#include "src/__support/macros/config.h"
+#include "src/__support/macros/optimization.h"
+#include "src/__support/math/expf.h"
+#include "src/__support/math/sinpif.h"
+
+namespace LIBC_NAMESPACE_DECL {
+namespace math {
+
+// Sets ERANGE, raises FE_OVERFLOW, and returns the overflow value
+// (+inf or max_normal) according to the sign and active IEEE 754 rounding mode.
+LIBC_INLINE bfloat16 tgammabf16_overflow(Sign sign) {
----------------
lntue wrote:

Move all the utility functions and tables + constants to `tgammabf16_internal` namespace.

https://github.com/llvm/llvm-project/pull/208689