| //===-- powixf2.cpp - Implement __powixf2 ---------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file implements __powixf2 for the compiler_rt library. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #if !_ARCH_PPC |
| |
| #include "int_lib.h" |
| |
| // Returns: a ^ b |
| |
| long double |
| __powixf2(long double a, si_int b) |
| { |
| const int recip = b < 0; |
| long double r = 1; |
| while (1) |
| { |
| if (b & 1) |
| r *= a; |
| b /= 2; |
| if (b == 0) |
| break; |
| a *= a; |
| } |
| return recip ? 1/r : r; |
| } |
| |
| #endif |