mirror of
https://github.com/jart/cosmopolitan.git
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60 lines
2.5 KiB
ArmAsm
60 lines
2.5 KiB
ArmAsm
/*-*- 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│
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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.h"
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/ ASCII uppercase → lowercase translation tables.
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/
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/ char kToLower[256];
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/ char16_t kToLower16[256];
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/
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/ @note kToLower16 saves 128kb; CMOVcc can't even 8-bit
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.initbss 300,_init_kToLower
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kToLower:
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.rept 256
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.byte 0
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.endr
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.endobj kToLower,globl,hidden
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kToLower16:
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.rept 256
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.short 0
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.endr
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.endobj kToLower16,globl,hidden
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.previous
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.init.start 300,_init_kToLower
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push %rdi
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call imapxlatab
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xchg %rsi,(%rsp)
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xor %ecx,%ecx
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0: inc %ecx
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addb $0x20,'A-1(%rsi,%rcx)
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cmp $'Z-'A,%ecx
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jne 0b
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xor %eax,%eax
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mov $256,%ecx
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0: lodsb
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stosw
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.loop 0b
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pop %rsi
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.init.end 300,_init_kToLower
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.type gperf_downcase,@object
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.globl gperf_downcase
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gperf_downcase = kToLower
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.source __FILE__
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