diff options
Diffstat (limited to 'include/mcl/fp.hpp')
| -rw-r--r-- | include/mcl/fp.hpp | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/include/mcl/fp.hpp b/include/mcl/fp.hpp index b159e2b..b6f4df8 100644 --- a/include/mcl/fp.hpp +++ b/include/mcl/fp.hpp @@ -270,12 +270,16 @@ public: } static inline void powerArray(FpT& z, const FpT& x, const Unit *y, size_t yn, bool isNegative) { - FpT out(1); - fp::powerGeneric(out, x, y, yn, FpT::mul, FpT::square); + FpT tmp; + const FpT *px = &x; + if (&z == &x) { + tmp = x; + px = &tmp; + } + z = 1; + fp::powerGeneric(z, *px, y, yn, FpT::mul, FpT::square); if (isNegative) { - FpT::inv(z, out); - } else { - z = out; + FpT::inv(z, z); } } template<class tag2, size_t maxBitSize2> |