cosmopolitan/libc/nexgen32e/ktolower.S

61 lines
2.5 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
Permission to use, copy, modify, and/or distribute this software for
any purpose with or without fee is hereby granted, provided that the
above copyright notice and this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.
*/
#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__