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Diffstat (limited to 'compiler-rt/lib/builtins/powitf2.c')
-rw-r--r-- | compiler-rt/lib/builtins/powitf2.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/compiler-rt/lib/builtins/powitf2.c b/compiler-rt/lib/builtins/powitf2.c new file mode 100644 index 000000000000..fcbdb4c2ee2a --- /dev/null +++ b/compiler-rt/lib/builtins/powitf2.c @@ -0,0 +1,33 @@ +//===-- powitf2.cpp - Implement __powitf2 ---------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// +// +// This file implements __powitf2 for the compiler_rt library. +// +//===----------------------------------------------------------------------===// + +#include "int_lib.h" + +#if _ARCH_PPC + +// Returns: a ^ b + +COMPILER_RT_ABI 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 |