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Add chibicc

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This program popped up on Hacker News recently. It's the only modern
compiler I've ever seen that doesn't have dependencies and is easily
modified. So I added all of the missing GNU extensions I like to use
which means it might be possible soon to build on non-Linux and have
third party not vendor gcc binaries.
This commit is contained in:
Justine Tunney 2020-12-05 12:20:41 -08:00
parent e44a0cf6f8
commit 8da931a7f6
298 changed files with 19493 additions and 11950 deletions
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64
libc/nexgen32e/khalfcache3.S Normal file
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/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program is distributed in the hope that it will be useful, but │
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/macros.h"
/ Half size of level 3 cache in bytes.
.initbss 202,_init_kHalfCache3
kHalfCache3:
.quad 0
.endobj kHalfCache3,globl
.previous
.init.start 202,_init_kHalfCache3
cmpl $3,kCpuids(%rip)
jbe 3f
xor %r8d,%r8d
mov $4,%r8d
1: mov %r8d,%eax
mov %r8d,%ecx
push %rbx
cpuid
mov %ebx,%r9d
pop %rbx
test $31,%al
je 3f
cmp $99,%al
jne 2f
mov %r9d,%eax
mov %r9d,%edx
inc %ecx
shr $12,%r9d
shr $22,%eax
and $0x0fff,%edx
and $0x03ff,%r9d
inc %eax
inc %edx
imul %edx,%eax
imul %ecx,%eax
lea 1(%r9),%ecx
imul %ecx,%eax
jmp 4f
2: inc %r8d
jmp 1b
3: mov $0x00400000,%eax
4: shr %eax
stosq
.init.end 202,_init_kHalfCache3
.source __FILE__