| //===-- powidf2.cpp - Implement __powidf2 ---------------------------------===// |
| // |
| // 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 __powidf2 for the compiler_rt library. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "int_lib.h" |
| |
| // Returns: a ^ b |
| |
| COMPILER_RT_ABI double __powidf2(double a, int b) { |
| const int recip = b < 0; |
| double r = 1; |
| while (1) { |
| if (b & 1) |
| r *= a; |
| b /= 2; |
| if (b == 0) |
| break; |
| a *= a; |
| } |
| return recip ? 1 / r : r; |
| } |
