mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
e557058ac8
This change addresses various open source compatibility issues, so that we pass 313/411 of the tests in https://github.com/jart/libc-test where earlier today we were passing about 30/411 of them, due to header toil. Please note that Glibc only passes 341/411 so 313 today is pretty good! - Make the conformance of libc/isystem/ headers nearly perfect - Import more of the remaining math library routines from Musl - Fix inconsistencies with type signatures of calls like umask - Write tests for getpriority/setpriority which work great now - conform to `struct sockaddr *` on remaining socket functions - Import a bunch of uninteresting stdlib functions e.g. rand48 - Introduce readdir_r, scandir, pthread_kill, sigsetjmp, etc.. Follow the instructions in our `tool/scripts/cosmocc` toolchain to run these tests yourself. You use `make CC=cosmocc` on the test repository
134 lines
5.2 KiB
C
134 lines
5.2 KiB
C
/*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8 -*-│
|
||
│vi: set et ft=c ts=8 tw=8 fenc=utf-8 :vi│
|
||
╚──────────────────────────────────────────────────────────────────────────────╝
|
||
│ │
|
||
│ Musl Libc │
|
||
│ Copyright © 2005-2020 Rich Felker, et al. │
|
||
│ │
|
||
│ Permission is hereby granted, free of charge, to any person obtaining │
|
||
│ a copy of this software and associated documentation files (the │
|
||
│ "Software"), to deal in the Software without restriction, including │
|
||
│ without limitation the rights to use, copy, modify, merge, publish, │
|
||
│ distribute, sublicense, and/or sell copies of the Software, and to │
|
||
│ permit persons to whom the Software is furnished to do so, subject to │
|
||
│ the following conditions: │
|
||
│ │
|
||
│ The above copyright notice and this permission notice shall be │
|
||
│ included in all copies or substantial portions of the Software. │
|
||
│ │
|
||
│ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │
|
||
│ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │
|
||
│ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │
|
||
│ IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY │
|
||
│ CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, │
|
||
│ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE │
|
||
│ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. │
|
||
│ │
|
||
╚─────────────────────────────────────────────────────────────────────────────*/
|
||
#include "libc/math.h"
|
||
#include "libc/tinymath/complex.internal.h"
|
||
#ifndef TINY
|
||
|
||
asm(".ident\t\"\\n\\n\
|
||
Musl libc (MIT License)\\n\
|
||
Copyright 2005-2014 Rich Felker, et. al.\"");
|
||
asm(".include \"libc/disclaimer.inc\"");
|
||
// clang-format off
|
||
|
||
/* origin: FreeBSD /usr/src/lib/msun/src/s_atanf.c */
|
||
/*
|
||
* Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
|
||
*/
|
||
/*
|
||
* ====================================================
|
||
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
|
||
*
|
||
* Developed at SunPro, a Sun Microsystems, Inc. business.
|
||
* Permission to use, copy, modify, and distribute this
|
||
* software is freely granted, provided that this notice
|
||
* is preserved.
|
||
* ====================================================
|
||
*/
|
||
|
||
static const float atanhi[] = {
|
||
4.6364760399e-01, /* atan(0.5)hi 0x3eed6338 */
|
||
7.8539812565e-01, /* atan(1.0)hi 0x3f490fda */
|
||
9.8279368877e-01, /* atan(1.5)hi 0x3f7b985e */
|
||
1.5707962513e+00, /* atan(inf)hi 0x3fc90fda */
|
||
};
|
||
|
||
static const float atanlo[] = {
|
||
5.0121582440e-09, /* atan(0.5)lo 0x31ac3769 */
|
||
3.7748947079e-08, /* atan(1.0)lo 0x33222168 */
|
||
3.4473217170e-08, /* atan(1.5)lo 0x33140fb4 */
|
||
7.5497894159e-08, /* atan(inf)lo 0x33a22168 */
|
||
};
|
||
|
||
static const float aT[] = {
|
||
3.3333328366e-01,
|
||
-1.9999158382e-01,
|
||
1.4253635705e-01,
|
||
-1.0648017377e-01,
|
||
6.1687607318e-02,
|
||
};
|
||
|
||
/**
|
||
* Returns arc tangent of 𝑥.
|
||
* @note should take ~12ns
|
||
*/
|
||
float atanf(float x)
|
||
{
|
||
float_t w,s1,s2,z;
|
||
uint32_t ix,sign;
|
||
int id;
|
||
|
||
GET_FLOAT_WORD(ix, x);
|
||
sign = ix>>31;
|
||
ix &= 0x7fffffff;
|
||
if (ix >= 0x4c800000) { /* if |x| >= 2**26 */
|
||
if (isnan(x))
|
||
return x;
|
||
z = atanhi[3] + 0x1p-120f;
|
||
return sign ? -z : z;
|
||
}
|
||
if (ix < 0x3ee00000) { /* |x| < 0.4375 */
|
||
if (ix < 0x39800000) { /* |x| < 2**-12 */
|
||
if (ix < 0x00800000)
|
||
/* raise underflow for subnormal x */
|
||
FORCE_EVAL(x*x);
|
||
return x;
|
||
}
|
||
id = -1;
|
||
} else {
|
||
x = fabsf(x);
|
||
if (ix < 0x3f980000) { /* |x| < 1.1875 */
|
||
if (ix < 0x3f300000) { /* 7/16 <= |x| < 11/16 */
|
||
id = 0;
|
||
x = (2.0f*x - 1.0f)/(2.0f + x);
|
||
} else { /* 11/16 <= |x| < 19/16 */
|
||
id = 1;
|
||
x = (x - 1.0f)/(x + 1.0f);
|
||
}
|
||
} else {
|
||
if (ix < 0x401c0000) { /* |x| < 2.4375 */
|
||
id = 2;
|
||
x = (x - 1.5f)/(1.0f + 1.5f*x);
|
||
} else { /* 2.4375 <= |x| < 2**26 */
|
||
id = 3;
|
||
x = -1.0f/x;
|
||
}
|
||
}
|
||
}
|
||
/* end of argument reduction */
|
||
z = x*x;
|
||
w = z*z;
|
||
/* break sum from i=0 to 10 aT[i]z**(i+1) into odd and even poly */
|
||
s1 = z*(aT[0]+w*(aT[2]+w*aT[4]));
|
||
s2 = w*(aT[1]+w*aT[3]);
|
||
if (id < 0)
|
||
return x - x*(s1+s2);
|
||
z = atanhi[id] - ((x*(s1+s2) - atanlo[id]) - x);
|
||
return sign ? -z : z;
|
||
}
|
||
|
||
#endif /* TINY */
|