[libc-commits] [compiler-rt] [libc] [llvm] [compiler-rt][builtins] introduce libc math routines (PR #197950)

[via libc-commits]

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@@ -0,0 +1,22 @@
+//===-- lib/addtf3.cpp - Quad-precision addition (libc-backed) --*- 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
+//
+//===----------------------------------------------------------------------===//
+//
+// __addtf3 implemented on top of LLVM-libc's shared::addtf3 instruction.
+//
+//===----------------------------------------------------------------------===//
+
+#define QUAD_PRECISION
+#include "fp_lib.h"
+
+#include "fp_libc_config.h"
+#include "int_lib.h"
+#include "shared/builtins/addtf3.h"
+
+extern "C" COMPILER_RT_ABI fp_t __addtf3(fp_t a, fp_t b) {
+  return LIBC_NAMESPACE::shared::addtf3(a, b);
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hulxv wrote:

libc wraps the namespace inside LIBC_NAMESPACE macro that could be defined at build-time. It's not a static name

@lntue correct me if I am wrong, please

https://github.com/llvm/llvm-project/pull/197950