1 /* ===-- powixf2.cpp - Implement __powixf2 ---------------------------------=== 2 * 3 * The LLVM Compiler Infrastructure 4 * 5 * This file is dual licensed under the MIT and the University of Illinois Open 6 * Source Licenses. See LICENSE.TXT for details. 7 * 8 * ===----------------------------------------------------------------------=== 9 * 10 * This file implements __powixf2 for the compiler_rt library. 11 * 12 * ===----------------------------------------------------------------------=== 13 */ 14 15 #if !_ARCH_PPC 16 17 #include "int_lib.h" 18 19 /* Returns: a ^ b */ 20 21 COMPILER_RT_ABI long double 22 __powixf2(long double a, si_int b) 23 { 24 const int recip = b < 0; 25 long double r = 1; 26 while (1) 27 { 28 if (b & 1) 29 r *= a; 30 b /= 2; 31 if (b == 0) 32 break; 33 a *= a; 34 } 35 return recip ? 1/r : r; 36 } 37 38 #endif 39
