cosmopolitan/libc/nexgen32e/imapxlatab.S

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/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
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vi: set et ft=asm ts=8 sw=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"
.text.startup
.align 8
/ Identity maps 256-byte translation table.
/
/ @param char (*rdi)[256]
/ @speed 90mBps
/ @mode long
imapxlatab:
.leafprologue
.profilable
pushpop 32,%rcx
mov $0x0706050403020100,%rax
mov $0x0808080808080808,%rdx
.align 8
1: stosq
add %rdx,%rax
.loop 1b
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.leafepilogue
.endfn imapxlatab,globl,hidden
.source __FILE__