[libc-commits] [libc] [llvm] [libc][math] Impl bfloat16 lgamma function. (PR #199312)

[via libc-commits]

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+//===-- Implementation of lgammabf16 ----------------------------*- 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_SRC___SUPPORT_MATH_LGAMMABF16_H
+#define LLVM_LIBC_SRC___SUPPORT_MATH_LGAMMABF16_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/macros/config.h"
+#include "src/__support/macros/optimization.h"
+#include "src/__support/math/log.h"
+
+namespace LIBC_NAMESPACE_DECL {
+namespace math {
+
+// Coefficients for lgamma on [n, n+1), centered at n+0.5
+// Each row: {c0, c1, c2, c3, c4} for fputil::polyeval in (x - (n+0.5))
+// Generated by numpy.polyfit with degree 4
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Sukumarsawant wrote:

Do add some script or something you used to generate it, so can verify them

https://github.com/llvm/llvm-project/pull/199312