1//===-- powisf2.cpp - Implement __powisf2 ---------------------------------===// 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-exception 6// 7//===----------------------------------------------------------------------===// 8// 9// This file implements __powisf2 for the compiler_rt library. 10// 11//===----------------------------------------------------------------------===// 12 13#include "int_lib.h" 14 15// Returns: a ^ b 16 17COMPILER_RT_ABI float __powisf2(float a, int b) { 18 const int recip = b < 0; 19 float r = 1; 20 while (1) { 21 if (b & 1) 22 r *= a; 23 b /= 2; 24 if (b == 0) 25 break; 26 a *= a; 27 } 28 return recip ? 1 / r : r; 29} 30