From a6b264b51d4fa786d9df659621fc1ffad1fdc5d0 Mon Sep 17 00:00:00 2001 From: Alexey Samsonov Date: Fri, 14 Feb 2014 09:20:33 +0000 Subject: Move original compiler-rt functions (libgcc replacement) to lib/builtins directory llvm-svn: 201393 --- compiler-rt/lib/builtins/powidf2.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 compiler-rt/lib/builtins/powidf2.c (limited to 'compiler-rt/lib/builtins/powidf2.c') diff --git a/compiler-rt/lib/builtins/powidf2.c b/compiler-rt/lib/builtins/powidf2.c new file mode 100644 index 00000000000..ac13b172b04 --- /dev/null +++ b/compiler-rt/lib/builtins/powidf2.c @@ -0,0 +1,34 @@ +/* ===-- powidf2.cpp - Implement __powidf2 ---------------------------------=== + * + * The LLVM Compiler Infrastructure + * + * This file is dual licensed under the MIT and the University of Illinois Open + * Source Licenses. See LICENSE.TXT for details. + * + * ===----------------------------------------------------------------------=== + * + * This file implements __powidf2 for the compiler_rt library. + * + * ===----------------------------------------------------------------------=== + */ + +#include "int_lib.h" + +/* Returns: a ^ b */ + +COMPILER_RT_ABI double +__powidf2(double a, si_int b) +{ + const int recip = b < 0; + double r = 1; + while (1) + { + if (b & 1) + r *= a; + b /= 2; + if (b == 0) + break; + a *= a; + } + return recip ? 1/r : r; +} -- cgit v1.2.3