1 //===-- powixf2.cpp - Implement __powixf2 ---------------------------------===//
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 __powixf2 for the compiler_rt library.
10 //
11 //===----------------------------------------------------------------------===//
12
13 #if !_ARCH_PPC
14
15 #include "int_lib.h"
16
17 // Returns: a ^ b
18
__powixf2(long double a,int b)19 COMPILER_RT_ABI long double __powixf2(long double a, int b) {
20 const int recip = b < 0;
21 long double r = 1;
22 while (1) {
23 if (b & 1)
24 r *= a;
25 b /= 2;
26 if (b == 0)
27 break;
28 a *= a;
29 }
30 return recip ? 1 / r : r;
31 }
32
33 #endif
34