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Make improvements
This change progresses our AARCH64 support:
- The AARCH64 build and tests are now passing
- Add 128-bit floating-point support to printf()
- Fix clone() so it initializes cosmo's x28 TLS register
- Fix TLS memory layout issue with aarch64 _Alignas vars
- Revamp microbenchmarking tools so they work on aarch64
- Make some subtle improvements to aarch64 crash reporting
- Make kisdangerous() memory checks more accurate on aarch64
- Remove sys_open() since it's not available on Linux AARCH64
This change makes general improvements to Cosmo and Redbean:
- Introduce GetHostIsa() function in Redbean
- You can now feature check using pledge(0, 0)
- You can now feature check using unveil("",0)
- Refactor some more x86-specific asm comments
- Refactor and write docs for some libm functions
- Make the mmap() API behave more similar to Linux
- Fix WIFSIGNALED() which wrongly returned true for zero
- Rename some obscure cosmo keywords from noFOO to dontFOO
This commit is contained in:
Justine Tunney
parent
5655c9a4e7
commit
8f522cb702
116 changed files with 1194 additions and 1025 deletions
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@ -1,119 +1,52 @@
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/*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8 -*-│
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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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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2023 Justine Alexandra Roberts Tunney │
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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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│ │
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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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│ │
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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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│ │
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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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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/limits.h"
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#include "libc/math.h"
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#include "libc/runtime/fenv.h"
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#include "libc/tinymath/expo.internal.h"
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#include "libc/tinymath/feval.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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asm(".include \"libc/disclaimer.inc\"");
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// clang-format off
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/*
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If the result cannot be represented (overflow, nan), then
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lrint raises the invalid exception.
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Otherwise if the input was not an integer then the inexact
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exception is raised.
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C99 is a bit vague about whether inexact exception is
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allowed to be raised when invalid is raised.
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(F.9 explicitly allows spurious inexact exceptions, F.9.6.5
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does not make it clear if that rule applies to lrint, but
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IEEE 754r 7.8 seems to forbid spurious inexact exception in
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the ineger conversion functions)
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So we try to make sure that no spurious inexact exception is
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raised in case of an overflow.
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If the bit size of long > precision of double, then there
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cannot be inexact rounding in case the result overflows,
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otherwise LONG_MAX and LONG_MIN can be represented exactly
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as a double.
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*/
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#if LONG_MAX < 1U<<53 && defined(FE_INEXACT)
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#if FLT_EVAL_METHOD==0 || FLT_EVAL_METHOD==1
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#define EPS DBL_EPSILON
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#elif FLT_EVAL_METHOD==2
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#define EPS LDBL_EPSILON
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#endif
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static dontinline long lrint_slow(double x) {
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// #pragma STDC FENV_ACCESS ON
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int e;
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e = fetestexcept(FE_INEXACT);
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x = rint(x);
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if (!e && (x > LONG_MAX || x < LONG_MIN))
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feclearexcept(FE_INEXACT);
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/* conversion */
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return x;
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}
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#else
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#define JUST_CALL_RINT
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#endif
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/**
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* Rounds to nearest integer.
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* Rounds to integer in current rounding mode.
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*
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* The floating-point exception `FE_INEXACT` is raised if the result is
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* different from the input.
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*/
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long lrint(double x)
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{
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long lrint(double x) {
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long i;
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#ifdef __x86_64__
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long res;
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asm("cvtsd2si\t%1,%0" : "=r"(res) : "x"(x));
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return res;
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asm("cvtsd2si\t%1,%0" : "=r"(i) : "x"(x));
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#elif defined(__aarch64__)
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long res;
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asm("frintx\t%d1,%d1\n\t"
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"fcvtzs\t%x0,%d1"
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: "=r"(res), "+w"(x));
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return res;
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asm("frintx\t%d1,%d1\n\t"
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"fcvtzs\t%x0,%d1"
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: "=r"(i), "+w"(x));
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#elif defined(__powerpc64__) && defined(_ARCH_PWR5X)
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long res;
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asm("fctid\t%0,%1" : "=d"(res) : "d"(x));
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return res;
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#elif defined(JUST_CALL_RINT)
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return rint(x);
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asm("fctid\t%0,%1" : "=d"(i) : "d"(x));
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#else
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uint32_t abstop = asuint64(x)>>32 & 0x7fffffff;
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uint64_t sign = asuint64(x) & (1ULL << 63);
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if (abstop < 0x41dfffff) {
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/* |x| < 0x7ffffc00, no overflow */
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double_t toint = asdouble(asuint64(1/EPS) | sign);
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double_t y = x + toint - toint;
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return (long)y;
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}
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return lrint_slow(x);
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i = rint(x);
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#endif /* __x86_64__ */
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return i;
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}
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#if __SIZEOF_LONG__ == __SIZEOF_LONG_LONG__
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__weak_reference(lrint, llrint);
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#endif
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#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
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__strong_reference(lrint, lrintl);
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#if __SIZEOF_LONG__ == __SIZEOF_LONG_LONG__
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__strong_reference(lrint, llrintl);
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#endif
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#endif
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