cosmopolitan/libc/nexgen32e/ktolower.S

62 lines
2.6 KiB
ArmAsm

/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
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"
/ ASCII uppercase lowercase translation tables.
/
/ char kToLower[256];
/ char16_t kToLower16[256];
/
/ @note kToLower16 saves 128kb; CMOVcc can't even 8-bit
.initbss 300,_init_kToLower
kToLower:
.rept 256
.byte 0
.endr
.endobj kToLower,globl,hidden
kToLower16:
.rept 256
.short 0
.endr
.endobj kToLower16,globl,hidden
.previous
.init.start 300,_init_kToLower
push %rdi
call imapxlatab
xchg %rsi,(%rsp)
xor %ecx,%ecx
0: inc %ecx
addb $0x20,'A-1(%rsi,%rcx)
cmp $'Z-'A,%ecx
jne 0b
xor %eax,%eax
mov $256,%ecx
0: lodsb
stosw
loop 0b
pop %rsi
.init.end 300,_init_kToLower
.type gperf_downcase,@object
.globl gperf_downcase
gperf_downcase = kToLower
.source __FILE__