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Port a lot more code to AARCH64
- Introduce epoll_pwait() - Rewrite -ftrapv and ffs() libraries in C code - Use more FreeBSD code in math function library - Get significantly more tests passing on qemu-aarch64 - Fix many Musl long double functions that were broken on AARCH64
This commit is contained in:
Justine Tunney
parent
91791e9f38
commit
550b52abf6
158 changed files with 6018 additions and 3499 deletions
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@ -2,79 +2,87 @@
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│vi: set et ft=c ts=8 tw=8 fenc=utf-8 :vi│
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╚──────────────────────────────────────────────────────────────────────────────╝
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│ │
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│ Musl Libc │
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│ Copyright © 2005-2014 Rich Felker, et al. │
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│ FreeBSD lib/msun/src/s_tanhf.c │
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│ Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com. │
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│ │
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│ Permission is hereby granted, free of charge, to any person obtaining │
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│ a copy of this software and associated documentation files (the │
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│ "Software"), to deal in the Software without restriction, including │
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│ without limitation the rights to use, copy, modify, merge, publish, │
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│ distribute, sublicense, and/or sell copies of the Software, and to │
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│ permit persons to whom the Software is furnished to do so, subject to │
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│ the following conditions: │
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│ Copyright (c) 1992-2023 The FreeBSD Project. │
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│ │
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│ The above copyright notice and this permission notice shall be │
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│ included in all copies or substantial portions of the Software. │
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│ Redistribution and use in source and binary forms, with or without │
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│ modification, are permitted provided that the following conditions │
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│ are met: │
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│ 1. Redistributions of source code must retain the above copyright │
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│ notice, this list of conditions and the following disclaimer. │
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│ 2. Redistributions in binary form must reproduce the above copyright │
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│ notice, this list of conditions and the following disclaimer in the │
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│ documentation and/or other materials provided with the distribution. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │
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│ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │
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│ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │
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│ IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY │
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│ CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, │
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│ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE │
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│ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. │
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│ THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND │
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│ ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE │
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│ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE │
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│ ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE │
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│ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL │
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│ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS │
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│ OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) │
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│ HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT │
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│ LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY │
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│ OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF │
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│ SUCH DAMAGE. │
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│ │
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│ Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. │
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│ Developed at SunPro, a Sun Microsystems, Inc. business. │
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│ Permission to use, copy, modify, and distribute this │
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│ software is freely granted, provided that this notice │
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│ is preserved. │
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│ │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/math.h"
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#include "libc/tinymath/feval.internal.h"
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#include "libc/tinymath/freebsd.internal.h"
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asm(".ident\t\"\\n\\n\
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Musl libc (MIT License)\\n\
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Copyright 2005-2014 Rich Felker, et. al.\"");
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FreeBSD libm (BSD-2 License)\\n\
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Copyright (c) 2005-2011, Bruce D. Evans, Steven G. Kargl, David Schultz.\"");
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asm(".ident\t\"\\n\\n\
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fdlibm (fdlibm license)\\n\
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Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.\"");
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asm(".include \"libc/disclaimer.inc\"");
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/* clang-format off */
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// clang-format off
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static const volatile float tiny = 1.0e-30;
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static const float one=1.0, two=2.0, huge = 1.0e30;
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/**
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* Returns hyperbolic tangent of 𝑥.
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*
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* tanh(x) = (exp(x) - exp(-x))/(exp(x) + exp(-x))
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* = (exp(2*x) - 1)/(exp(2*x) - 1 + 2)
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* = (1 - exp(-2*x))/(exp(-2*x) - 1 + 2)
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*/
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float tanhf(float x)
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float
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tanhf(float x)
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{
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union {float f; uint32_t i;} u = {.f = x};
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uint32_t w;
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int sign;
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float t;
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float t,z;
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int32_t jx,ix;
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/* x = |x| */
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sign = u.i >> 31;
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u.i &= 0x7fffffff;
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x = u.f;
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w = u.i;
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GET_FLOAT_WORD(jx,x);
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ix = jx&0x7fffffff;
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if (w > 0x3f0c9f54) {
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/* |x| > log(3)/2 ~= 0.5493 or nan */
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if (w > 0x41200000) {
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/* |x| > 10 */
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t = 1 + 0/x;
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} else {
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t = expm1f(2*x);
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t = 1 - 2/(t+2);
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}
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} else if (w > 0x3e82c578) {
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/* |x| > log(5/3)/2 ~= 0.2554 */
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t = expm1f(2*x);
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t = t/(t+2);
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} else if (w >= 0x00800000) {
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/* |x| >= 0x1p-126 */
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t = expm1f(-2*x);
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t = -t/(t+2);
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} else {
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/* |x| is subnormal */
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fevalf(x*x);
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t = x;
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/* x is INF or NaN */
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if(ix>=0x7f800000) {
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if (jx>=0) return one/x+one; /* tanh(+-inf)=+-1 */
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else return one/x-one; /* tanh(NaN) = NaN */
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}
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return sign ? -t : t;
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/* |x| < 9 */
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if (ix < 0x41100000) { /* |x|<9 */
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if (ix<0x39800000) { /* |x|<2**-12 */
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if(huge+x>one) return x; /* tanh(tiny) = tiny with inexact */
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}
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if (ix>=0x3f800000) { /* |x|>=1 */
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t = expm1f(two*fabsf(x));
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z = one - two/(t+two);
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} else {
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t = expm1f(-two*fabsf(x));
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z= -t/(t+two);
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}
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/* |x| >= 9, return +-1 */
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} else {
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z = one - tiny; /* raise inexact flag */
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}
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return (jx>=0)? z: -z;
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}
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