log_data.h

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/*
 * PROJECT:     ReactOS CRT
 * LICENSE:     MIT (https://spdx.org/licenses/MIT)
 * PURPOSE:     Data tables for log.
 * COPYRIGHT:   Imported from musl libc
 *              https://git.musl-libc.org/cgit/musl/tree/src/math/log_data.h
 *              blob: 1be22ab242a3699fe192ec7bb636d29babca5074
 *              See https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 */
 
/*
 * Copyright (c) 2018, Arm Limited.
 * SPDX-License-Identifier: MIT
 */
#ifndef _LOG_DATA_H
#define _LOG_DATA_H
 
#include "libm.h"
 
#define LOG_TABLE_BITS 7
#define LOG_POLY_ORDER 6
#define LOG_POLY1_ORDER 12
extern hidden const struct log_data {
    double ln2hi;
    double ln2lo;
    double poly[LOG_POLY_ORDER - 1]; /* First coefficient is 1.  */
    double poly1[LOG_POLY1_ORDER - 1];
    struct {
        double invc, logc;
    } tab[1 << LOG_TABLE_BITS];
#if !__FP_FAST_FMA
    struct {
        double chi, clo;
    } tab2[1 << LOG_TABLE_BITS];
#endif
} __log_data;
 
#endif