9af8dca70f
Simplify the range reduction steps by choosing the reduction constants carefully so that the reduced arguments v = r*m_x - 1 and v^2 are exact in double precision, even without FMA instructions, and -2^-8 <= v < 2^-7. This allows the polynomial evaluations to be parallelized more efficiently. Reviewed By: zimmermann6 Differential Revision: https://reviews.llvm.org/D147676