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 | |
19 | COMPILER_RT_ABI xf_float __powixf2(xf_float a, int b) { |
20 | const int recip = b < 0; |
21 | xf_float 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 | |