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-rw-r--r--libc/src/math/generic/common_constants.h73
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diff --git a/libc/src/math/generic/common_constants.h b/libc/src/math/generic/common_constants.h
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-//===-- Common constants for math functions ---------------------*- C++ -*-===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_LIBC_SRC_MATH_GENERIC_COMMON_CONSTANTS_H
-#define LLVM_LIBC_SRC_MATH_GENERIC_COMMON_CONSTANTS_H
-
-#include "src/__support/FPUtil/triple_double.h"
-#include "src/__support/macros/config.h"
-#include "src/__support/math/acosh_float_constants.h"
-#include "src/__support/math/exp_constants.h"
-#include "src/__support/number_pair.h"
-
-namespace LIBC_NAMESPACE_DECL {
-
-// Lookup table for range reduction constants r for logarithms.
-extern const float R[128];
-
-// Lookup table for range reduction constants r for logarithms.
-extern const double RD[128];
-
-// Lookup table for compensated constants for exact range reduction when FMA
-// instructions are not available.
-extern const double CD[128];
-
-// Lookup table for -log(r)
-extern const double LOG_R[128];
-extern const NumberPair<double> LOG_R_DD[128];
-
-// Lookup table for -log2(r)
-extern const double LOG2_R[128];
-
-// Minimax polynomial for (log(1 + x) - x)/x^2, generated by sollya with:
-// > P = fpminimax((log(1 + x) - x)/x^2, 5, [|D...|], [-2^-8, 2^-7]);
-constexpr double LOG_COEFFS[6] = {-0x1.fffffffffffffp-2, 0x1.5555555554a9bp-2,
- -0x1.0000000094567p-2, 0x1.99999dcc9823cp-3,
- -0x1.55550ac2e537ap-3, 0x1.21a02c4e624d7p-3};
-
-// Logarithm Range Reduction - Step 2, 3, and 4.
-extern const int S2[193];
-extern const int S3[161];
-extern const int S4[130];
-
-extern const double R2[193];
-
-// log(2) generated by Sollya with:
-// > a = 2^-43 * nearestint(2^43*log(2));
-// LSB = 2^-43 is chosen so that e_x * LOG_2_HI is exact for -1075 < e_x < 1024.
-constexpr double LOG_2_HI = 0x1.62e42fefa38p-1; // LSB = 2^-43
-// > b = round(log10(2) - a, D, RN);
-constexpr double LOG_2_LO = 0x1.ef35793c7673p-45; // LSB = 2^-97
-
-// Lookup table for exp(m) with m = -104, ..., 89.
-// -104 = floor(log(single precision's min denormal))
-// 89 = ceil(log(single precision's max normal))
-// Table is generated with Sollya as follow:
-// > display = hexadecimal;
-// > for i from -104 to 89 do { D(exp(i)); };
-extern const double EXP_M1[195];
-
-// Lookup table for exp(m * 2^(-7)) with m = 0, ..., 127.
-// Table is generated with Sollya as follow:
-// > display = hexadecimal;
-// > for i from 0 to 127 do { D(exp(i / 128)); };
-extern const double EXP_M2[128];
-
-} // namespace LIBC_NAMESPACE_DECL
-
-#endif // LLVM_LIBC_SRC_MATH_GENERIC_COMMON_CONSTANTS_H