mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
8f522cb702
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
52 lines
2.6 KiB
C
52 lines
2.6 KiB
C
/*-*- 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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│ 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/math.h"
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/**
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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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long i;
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#ifdef __x86_64__
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asm("cvtsd2si\t%1,%0" : "=r"(i) : "x"(x));
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#elif defined(__aarch64__)
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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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asm("fctid\t%0,%1" : "=d"(i) : "d"(x));
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#else
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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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