35 lines · c
1//===-- powitf2.cpp - Implement __powitf2 ---------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// This file implements __powitf2 for the compiler_rt library.10//11//===----------------------------------------------------------------------===//12 13#define QUAD_PRECISION14#include "fp_lib.h"15 16#if defined(CRT_HAS_TF_MODE)17 18// Returns: a ^ b19 20COMPILER_RT_ABI fp_t __powitf2(fp_t a, int b) {21 const int recip = b < 0;22 fp_t r = 1;23 while (1) {24 if (b & 1)25 r *= a;26 b /= 2;27 if (b == 0)28 break;29 a *= a;30 }31 return recip ? 1 / r : r;32}33 34#endif35