mirror of
https://github.com/jart/cosmopolitan.git
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2fc507c98f
* modelines: tw -> sw shiftwidth, not textwidth. * space-surround modelines * fix irregular modelines * Fix modeline in titlegen.c
76 lines
2.6 KiB
ArmAsm
76 lines
2.6 KiB
ArmAsm
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
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│ vi: set noet ft=asm ts=8 sw=8 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 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/macros.internal.h"
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#ifdef __x86_64__
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.initbss 202,_init_kHalfCache3
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// Half size of level 3 cache in bytes.
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kHalfCache3:
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.quad 0
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.endobj kHalfCache3,globl
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.previous
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.init.start 202,_init_kHalfCache3
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cmpl $3,kCpuids(%rip)
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jbe 3f
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xor %r8d,%r8d
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mov $4,%r8d
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1: mov %r8d,%eax
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mov %r8d,%ecx
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push %rbx
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cpuid
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mov %ebx,%r9d
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pop %rbx
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test $31,%al
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je 3f
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cmp $99,%al
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jne 2f
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mov %r9d,%eax
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mov %r9d,%edx
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inc %ecx
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shr $12,%r9d
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shr $22,%eax
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and $0x0fff,%edx
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and $0x03ff,%r9d
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inc %eax
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inc %edx
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imul %edx,%eax
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imul %ecx,%eax
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lea 1(%r9),%ecx
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imul %ecx,%eax
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jmp 4f
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2: inc %r8d
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jmp 1b
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3: mov $0x00400000,%eax
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4: shr %eax
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stosq
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.init.end 202,_init_kHalfCache3
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#else
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.rodata
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.balign 8
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kHalfCache3:
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.quad 4 * 1024 * 1024
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.endobj kHalfCache3,globl
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.previous
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#endif /* __x86_64__ */
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