| 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 | |