1*412f47f9SXin Li /* 2*412f47f9SXin Li * Coefficients and table entries for double-precision cbrt(x). 3*412f47f9SXin Li * 4*412f47f9SXin Li * Copyright (c) 2022-2023, Arm Limited. 5*412f47f9SXin Li * SPDX-License-Identifier: MIT OR Apache-2.0 WITH LLVM-exception 6*412f47f9SXin Li */ 7*412f47f9SXin Li 8*412f47f9SXin Li #include "math_config.h" 9*412f47f9SXin Li 10*412f47f9SXin Li const struct cbrt_data __cbrt_data 11*412f47f9SXin Li = {.poly = { /* Coefficients for very rough approximation of cbrt(x) in [0.5, 1]. 12*412f47f9SXin Li See cbrt.sollya for details of generation. */ 13*412f47f9SXin Li 0x1.c14e8ee44767p-2, 0x1.dd2d3f99e4c0ep-1, -0x1.08e83026b7e74p-1, 0x1.2c74eaa3ba428p-3}, 14*412f47f9SXin Li .table = { /* table[i] = 2^((i - 2) / 3). */ 15*412f47f9SXin Li 0x1.428a2f98d728bp-1, 0x1.965fea53d6e3dp-1, 0x1p0, 0x1.428a2f98d728bp0, 0x1.965fea53d6e3dp0}}; 16