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61 lines
2.6 KiB
61 lines
2.6 KiB
/*-*- 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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│ This program is free software; you can redistribute it and/or modify │ |
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│ it under the terms of the GNU General Public License as published by │ |
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│ the Free Software Foundation; version 2 of the License. │ |
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│ │ |
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│ This program is distributed in the hope that it will be useful, but │ |
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │ |
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │ |
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│ General Public License for more details. │ |
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│ │ |
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│ You should have received a copy of the GNU General Public License │ |
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│ along with this program; if not, write to the Free Software │ |
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │ |
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│ 02110-1301 USA │ |
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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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