llvm/compiler-rt/lib/builtins/floatuntixf.c

//===-- floatuntixf.c - Implement __floatuntixf ---------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This file implements __floatuntixf for the compiler_rt library.
//
//===----------------------------------------------------------------------===//

#include "int_lib.h"

#ifdef CRT_HAS_128BIT

// Returns: convert a to a long double, rounding toward even.

// Assumption: long double is a IEEE 80 bit floating point type padded to 128
// bits tu_int is a 128 bit integral type

// gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee
// eeee | 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm
// mmmm mmmm mmmm

COMPILER_RT_ABI xf_float __floatuntixf(tu_int a) { … }

#endif