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authored <ed@FreeBSD.org>2010-11-11 15:13:11 +0000
committered <ed@FreeBSD.org>2010-11-11 15:13:11 +0000
commit870837e3e92f721a44db51308f2b900d928fb04f (patch)
tree9f851f7f6da4a4d9010d26bf17881d3bc5320f2b /contrib/compiler-rt/lib/powitf2.c
parenta1b6fa69a6f674978270e402b8bba6552e152066 (diff)
parent653bb6745595746d04ad4acacaaab66caaaeb69b (diff)
downloadFreeBSD-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.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/contrib/compiler-rt/lib/powitf2.c b/contrib/compiler-rt/lib/powitf2.c
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+++ b/contrib/compiler-rt/lib/powitf2.c
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+/* ===-- 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
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