mirror of
https://github.com/jart/cosmopolitan.git
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6e6fc38935
Commit bc6c183 introduced a bunch of discrepancies between what files
look like in the repo and what clang-format says they should look like.
However, there were already a few discrepancies prior to that. Most of
these discrepancies seemed to be unintentional, but a few of them were
load-bearing (e.g., a #include that violated header ordering needing
something to have been #defined by a 'later' #include.)
I opted to take what I hope is a relatively smooth-brained approach: I
reverted the .clang-format change, ran clang-format on the whole repo,
reapplied the .clang-format change, reran clang-format again, and then
reverted the commit that contained the first run. Thus the full effect
of this PR should only be to apply the changed formatting rules to the
repo, and from skimming the results, this seems to be the case.
My work can be checked by applying the short, manual commits, and then
rerunning the command listed in the autogenerated commits (those whose
messages I have prefixed auto:) and seeing if your results agree.
It might be that the other diffs should be fixed at some point but I'm
leaving that aside for now.
fd '\.c(c|pp)?$' --print0| xargs -0 clang-format -i
212 lines
6.7 KiB
C
212 lines
6.7 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et 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/calls/calls.h"
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#include "libc/nexgen32e/x86feature.h"
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#include "libc/nexgen32e/x86info.h"
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#include "libc/runtime/runtime.h"
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#include "third_party/getopt/getopt.internal.h"
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/**
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* @fileoverview Command for printing `-march=native` flags.
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*
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* In recent years (2023) compilers have decided to remove support for
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* the `-march=native` flag, even on x86. That's unfortunate, since as
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* we can see below, grokking all the various microarchitecture is not
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* something a compiler should reasonably expect from users especially
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* not for a flag as important as this one, which can have a night and
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* day impact for apps that do scientific computing.
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*
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* This is a tiny program, that makes it easy for shell scripts to get
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* these flags.
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*/
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#define VERSION \
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"-march=native flag printer v0.1\n" \
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"copyright 2023 justine alexandra roberts tunney\n"
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#define USAGE \
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"usage: march-native [-hvc]\n" \
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" -h show help\n" \
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" -v show version\n" \
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" -c assume we're using clang (not gcc)\n"
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static bool isclang;
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static void GetOpts(int argc, char *argv[]) {
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int opt;
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while ((opt = getopt(argc, argv, "hvc")) != -1) {
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switch (opt) {
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case 'c':
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isclang = true;
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break;
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case 'v':
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tinyprint(1, VERSION, NULL);
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exit(0);
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case 'h':
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tinyprint(1, VERSION, USAGE, NULL);
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exit(0);
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default:
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tinyprint(2, VERSION, USAGE, NULL);
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exit(1);
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}
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}
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}
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static void Puts(const char *s) {
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tinyprint(1, s, "\n", NULL);
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}
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int main(int argc, char *argv[]) {
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GetOpts(argc, argv);
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#ifdef __x86_64__
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struct X86ProcessorModel *model;
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if (X86_HAVE(XOP))
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Puts("-mxop");
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if (X86_HAVE(SSE4A))
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Puts("-msse4a");
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if (X86_HAVE(SSE3))
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Puts("-msse3");
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if (X86_HAVE(SSSE3))
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Puts("-mssse3");
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if (X86_HAVE(SSE4_1))
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Puts("-msse4.1");
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if (X86_HAVE(SSE4_2))
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Puts("-msse4.2");
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if (X86_HAVE(AVX))
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Puts("-mavx");
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if (X86_HAVE(AVX2)) {
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Puts("-mavx2");
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if (!isclang) {
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Puts("-msse2avx");
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Puts("-Wa,-msse2avx");
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}
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}
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if (X86_HAVE(AVX512F))
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Puts("-mavx512f");
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if (X86_HAVE(AVX512PF))
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Puts("-mavx512pf");
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if (X86_HAVE(AVX512ER))
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Puts("-mavx512er");
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if (X86_HAVE(AVX512CD))
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Puts("-mavx512cd");
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if (X86_HAVE(AVX512VL))
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Puts("-mavx512vl");
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if (X86_HAVE(AVX512BW))
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Puts("-mavx512bw");
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if (X86_HAVE(AVX512DQ))
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Puts("-mavx512dq");
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if (X86_HAVE(AVX512IFMA))
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Puts("-mavx512ifma");
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if (X86_HAVE(AVX512VBMI))
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Puts("-mavx512vbmi");
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if (X86_HAVE(SHA))
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Puts("-msha");
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if (X86_HAVE(AES))
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Puts("-maes");
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if (X86_HAVE(VAES))
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Puts("-mvaes");
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if (X86_HAVE(PCLMUL))
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Puts("-mpclmul");
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if (X86_HAVE(FSGSBASE))
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Puts("-mfsgsbase");
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if (X86_HAVE(F16C))
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Puts("-mf16c");
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if (X86_HAVE(FMA))
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Puts("-mfma");
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if (X86_HAVE(POPCNT))
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Puts("-mpopcnt");
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if (X86_HAVE(BMI))
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Puts("-mbmi");
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if (X86_HAVE(BMI2))
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Puts("-mbmi2");
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if (X86_HAVE(ADX))
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Puts("-madx");
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if (X86_HAVE(FXSR))
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Puts("-mfxsr");
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if ((model = (void *)getx86processormodel(kX86ProcessorModelKey))) {
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switch (model->march) {
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case X86_MARCH_CORE2:
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Puts("-march=core2");
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break;
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case X86_MARCH_NEHALEM:
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Puts("-march=nehalem");
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break;
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case X86_MARCH_WESTMERE:
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Puts("-march=westmere");
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break;
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case X86_MARCH_SANDYBRIDGE:
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Puts("-march=sandybridge");
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break;
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case X86_MARCH_IVYBRIDGE:
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Puts("-march=ivybridge");
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break;
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case X86_MARCH_HASWELL:
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Puts("-march=haswell");
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break;
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case X86_MARCH_BROADWELL:
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Puts("-march=broadwell");
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break;
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case X86_MARCH_SKYLAKE:
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case X86_MARCH_KABYLAKE:
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Puts("-march=skylake");
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break;
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case X86_MARCH_CANNONLAKE:
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Puts("-march=cannonlake");
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break;
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case X86_MARCH_ICELAKE:
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if (model->grade >= X86_GRADE_SERVER) {
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Puts("-march=icelake-server");
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} else {
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Puts("-march=icelake-client");
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}
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break;
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case X86_MARCH_TIGERLAKE:
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Puts("-march=tigerlake");
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break;
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case X86_MARCH_BONNELL:
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case X86_MARCH_SALTWELL:
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Puts("-march=bonnell");
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break;
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case X86_MARCH_SILVERMONT:
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case X86_MARCH_AIRMONT:
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Puts("-march=silvermont");
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break;
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case X86_MARCH_GOLDMONT:
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Puts("-march=goldmont");
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break;
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case X86_MARCH_GOLDMONTPLUS:
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Puts("-march=goldmont-plus");
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break;
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case X86_MARCH_TREMONT:
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Puts("-march=tremont");
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break;
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case X86_MARCH_KNIGHTSLANDING:
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Puts("-march=knl");
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break;
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case X86_MARCH_KNIGHTSMILL:
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Puts("-march=knm");
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break;
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}
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}
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#elif defined(__aarch64__)
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// TODO(jart): How can we determine CPU features on AARCH64?
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#else
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// otherwise do nothing (it's usually best)
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#endif
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}
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