1 //===-- Collection of utils for exp and friends -----------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef LLVM_LIBC_SRC_MATH_GENERIC_EXP_UTILS_H 10 #define LLVM_LIBC_SRC_MATH_GENERIC_EXP_UTILS_H 11 12 #include "src/__support/macros/config.h" 13 #include <stdint.h> 14 15 #define EXP2F_TABLE_BITS 5 16 #define EXP2F_POLY_ORDER 3 17 #define N (1 << EXP2F_TABLE_BITS) 18 19 namespace LIBC_NAMESPACE_DECL { 20 21 struct Exp2fDataTable { 22 uint64_t tab[1 << EXP2F_TABLE_BITS]; 23 double shift_scaled; 24 double poly[EXP2F_POLY_ORDER]; 25 double shift; 26 double invln2_scaled; 27 double poly_scaled[EXP2F_POLY_ORDER]; 28 }; 29 30 extern const Exp2fDataTable exp2f_data; 31 32 } // namespace LIBC_NAMESPACE_DECL 33 34 #endif // LLVM_LIBC_SRC_MATH_GENERIC_EXP_UTILS_H 35