sqrt_data.h

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/*
 * PROJECT:     ReactOS CRT
 * LICENSE:     MIT (https://spdx.org/licenses/MIT)
 * PURPOSE:     Data table for sqrt.
 * COPYRIGHT:   Imported from musl libc
 *              https://git.musl-libc.org/cgit/musl/tree/src/math/sqrt_data.h
 *              blob: 260c7f9c292beb48fd7a0985a58a7740d38c0d5e
 *              See https://git.musl-libc.org/cgit/musl/tree/COPYRIGHT
 */
 
#ifndef _SQRT_DATA_H
#define _SQRT_DATA_H
 
#include "libm.h"
#include <stdint.h>
 
/* if x in [1,2): i = (int)(64*x);
   if x in [2,4): i = (int)(32*x-64);
   __rsqrt_tab[i]*2^-16 is estimating 1/sqrt(x) with small relative error:
   |__rsqrt_tab[i]*0x1p-16*sqrt(x) - 1| < -0x1.fdp-9 < 2^-8 */
extern hidden const uint16_t __rsqrt_tab[128];
 
#endif