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author | ed <ed@FreeBSD.org> | 2010-11-11 15:13:11 +0000 |
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committer | ed <ed@FreeBSD.org> | 2010-11-11 15:13:11 +0000 |
commit | 870837e3e92f721a44db51308f2b900d928fb04f (patch) | |
tree | 9f851f7f6da4a4d9010d26bf17881d3bc5320f2b /contrib/compiler-rt/lib/powitf2.c | |
parent | a1b6fa69a6f674978270e402b8bba6552e152066 (diff) | |
parent | 653bb6745595746d04ad4acacaaab66caaaeb69b (diff) | |
download | FreeBSD-src-870837e3e92f721a44db51308f2b900d928fb04f.zip FreeBSD-src-870837e3e92f721a44db51308f2b900d928fb04f.tar.gz |
Import libcompiler_rt into HEAD and add Makefiles.
Obtained from: user/ed/compiler-rt
Diffstat (limited to 'contrib/compiler-rt/lib/powitf2.c')
-rw-r--r-- | contrib/compiler-rt/lib/powitf2.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/contrib/compiler-rt/lib/powitf2.c b/contrib/compiler-rt/lib/powitf2.c new file mode 100644 index 0000000..3dacbf6 --- /dev/null +++ b/contrib/compiler-rt/lib/powitf2.c @@ -0,0 +1,38 @@ +/* ===-- powitf2.cpp - Implement __powitf2 ---------------------------------=== + * + * The LLVM Compiler Infrastructure + * + * This file is distributed under the University of Illinois Open Source + * License. See LICENSE.TXT for details. + * + * ===----------------------------------------------------------------------=== + * + * This file implements __powitf2 for the compiler_rt library. + * + * ===----------------------------------------------------------------------=== + */ + +#if _ARCH_PPC + +#include "int_lib.h" + +/* Returns: a ^ b */ + +long double +__powitf2(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 |